./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-middle-data.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-middle-data.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx --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 64bit --witnessprinter.graph.data.programhash 1f089d84611e193726b0906f7c8f41bdfbd2779029235be3e70f3cbcf8b5071e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:58:03,911 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:58:04,029 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-21 20:58:04,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:58:04,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:58:04,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:58:04,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:58:04,071 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:58:04,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:58:04,073 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:58:04,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:58:04,074 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:58:04,075 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:58:04,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:58:04,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:58:04,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:58:04,080 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 20:58:04,080 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 20:58:04,081 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 20:58:04,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:58:04,082 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 20:58:04,084 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 20:58:04,084 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:58:04,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:58:04,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:58:04,086 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:58:04,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:58:04,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:58:04,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:58:04,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:58:04,089 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:58:04,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:58:04,090 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:58:04,090 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:58:04,090 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:58:04,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:58:04,090 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f089d84611e193726b0906f7c8f41bdfbd2779029235be3e70f3cbcf8b5071e [2023-11-21 20:58:04,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:58:04,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:58:04,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:58:04,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:58:04,436 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:58:04,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/memsafety-broom/sll-middle-data.i [2023-11-21 20:58:07,631 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:58:08,014 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:58:08,015 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/sv-benchmarks/c/memsafety-broom/sll-middle-data.i [2023-11-21 20:58:08,065 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/data/a9591d784/1cc62e4025de4539861109241d96f88e/FLAGf942baf77 [2023-11-21 20:58:08,087 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/data/a9591d784/1cc62e4025de4539861109241d96f88e [2023-11-21 20:58:08,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:58:08,096 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:58:08,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:58:08,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:58:08,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:58:08,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdd73e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08, skipping insertion in model container [2023-11-21 20:58:08,110 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,190 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:58:08,440 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 20:58:08,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:58:08,561 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:58:08,599 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 20:58:08,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:58:08,670 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 20:58:08,677 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:58:08,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08 WrapperNode [2023-11-21 20:58:08,677 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:58:08,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:58:08,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:58:08,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:58:08,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,728 INFO L138 Inliner]: procedures = 122, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 76 [2023-11-21 20:58:08,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:58:08,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:58:08,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:58:08,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:58:08,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,743 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,743 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,757 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,758 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,760 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:58:08,767 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:58:08,767 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:58:08,767 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:58:08,768 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (1/1) ... [2023-11-21 20:58:08,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:58:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:08,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:58:08,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:58:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 20:58:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-21 20:58:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-21 20:58:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 20:58:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 20:58:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 20:58:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 20:58:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:58:08,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:58:09,025 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:58:09,028 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:58:09,355 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:58:09,422 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:58:09,423 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 20:58:09,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:09 BoogieIcfgContainer [2023-11-21 20:58:09,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:58:09,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:58:09,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:58:09,431 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:58:09,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:58:08" (1/3) ... [2023-11-21 20:58:09,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e2d6bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:09, skipping insertion in model container [2023-11-21 20:58:09,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:08" (2/3) ... [2023-11-21 20:58:09,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e2d6bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:09, skipping insertion in model container [2023-11-21 20:58:09,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:09" (3/3) ... [2023-11-21 20:58:09,435 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-middle-data.i [2023-11-21 20:58:09,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:58:09,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-21 20:58:09,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:58:09,512 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5bcc293b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:58:09,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-21 20:58:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 20:58:09,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:09,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 20:58:09,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:09,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash 4451354, now seen corresponding path program 1 times [2023-11-21 20:58:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:09,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259382267] [2023-11-21 20:58:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:09,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259382267] [2023-11-21 20:58:09,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259382267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:09,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:09,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:58:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336616050] [2023-11-21 20:58:09,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:09,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:58:09,893 INFO L87 Difference]: Start difference. First operand has 53 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:10,027 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2023-11-21 20:58:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:10,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 20:58:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:10,038 INFO L225 Difference]: With dead ends: 52 [2023-11-21 20:58:10,038 INFO L226 Difference]: Without dead ends: 51 [2023-11-21 20:58:10,041 INFO L412 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 [2023-11-21 20:58:10,046 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:10,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:10,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-21 20:58:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-21 20:58:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-11-21 20:58:10,092 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 4 [2023-11-21 20:58:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:10,093 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-11-21 20:58:10,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-11-21 20:58:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 20:58:10,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:10,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 20:58:10,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:58:10,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:10,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash 4451355, now seen corresponding path program 1 times [2023-11-21 20:58:10,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:10,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534239830] [2023-11-21 20:58:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:10,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:10,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534239830] [2023-11-21 20:58:10,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534239830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:10,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:10,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:58:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224399830] [2023-11-21 20:58:10,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:10,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:10,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:58:10,226 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:10,318 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2023-11-21 20:58:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 20:58:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:10,321 INFO L225 Difference]: With dead ends: 50 [2023-11-21 20:58:10,321 INFO L226 Difference]: Without dead ends: 50 [2023-11-21 20:58:10,323 INFO L412 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 [2023-11-21 20:58:10,324 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:10,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-21 20:58:10,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-21 20:58:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 23 states have (on average 2.130434782608696) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-11-21 20:58:10,334 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 4 [2023-11-21 20:58:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:10,334 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-11-21 20:58:10,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-11-21 20:58:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 20:58:10,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:10,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:10,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 20:58:10,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:10,338 INFO L85 PathProgramCache]: Analyzing trace with hash -530348794, now seen corresponding path program 1 times [2023-11-21 20:58:10,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:10,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763073046] [2023-11-21 20:58:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:10,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:10,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:10,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763073046] [2023-11-21 20:58:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763073046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112653231] [2023-11-21 20:58:10,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:10,580 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:10,785 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-11-21 20:58:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:58:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-21 20:58:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:10,789 INFO L225 Difference]: With dead ends: 49 [2023-11-21 20:58:10,789 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 20:58:10,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:10,793 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:10,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 70 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 20:58:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 20:58:10,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-11-21 20:58:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-11-21 20:58:10,802 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 7 [2023-11-21 20:58:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:10,803 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-11-21 20:58:10,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-11-21 20:58:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 20:58:10,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:10,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:10,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 20:58:10,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:10,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -530348793, now seen corresponding path program 1 times [2023-11-21 20:58:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897945748] [2023-11-21 20:58:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:11,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897945748] [2023-11-21 20:58:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897945748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:11,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:11,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840383875] [2023-11-21 20:58:11,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:58:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:58:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:11,051 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:11,220 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-11-21 20:58:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:11,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-21 20:58:11,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:11,222 INFO L225 Difference]: With dead ends: 47 [2023-11-21 20:58:11,222 INFO L226 Difference]: Without dead ends: 47 [2023-11-21 20:58:11,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:11,224 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:11,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-21 20:58:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-11-21 20:58:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.826086956521739) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-11-21 20:58:11,231 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 7 [2023-11-21 20:58:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:11,231 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-11-21 20:58:11,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-11-21 20:58:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 20:58:11,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:11,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 20:58:11,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -928522982, now seen corresponding path program 1 times [2023-11-21 20:58:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795068947] [2023-11-21 20:58:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:11,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795068947] [2023-11-21 20:58:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795068947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:11,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459199408] [2023-11-21 20:58:11,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:11,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:58:11,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:58:11,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:11,395 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:11,548 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-11-21 20:58:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:11,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-21 20:58:11,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:11,553 INFO L225 Difference]: With dead ends: 50 [2023-11-21 20:58:11,553 INFO L226 Difference]: Without dead ends: 50 [2023-11-21 20:58:11,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:11,556 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:11,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-21 20:58:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-21 20:58:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-11-21 20:58:11,570 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 13 [2023-11-21 20:58:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:11,570 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-11-21 20:58:11,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-11-21 20:58:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 20:58:11,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:11,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:11,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 20:58:11,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:11,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -928522981, now seen corresponding path program 1 times [2023-11-21 20:58:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:11,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765198019] [2023-11-21 20:58:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:11,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:11,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:11,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765198019] [2023-11-21 20:58:11,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765198019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:11,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:11,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 20:58:11,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65722090] [2023-11-21 20:58:11,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:11,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 20:58:11,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 20:58:11,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:11,848 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:12,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:12,039 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-11-21 20:58:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:58:12,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-21 20:58:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:12,041 INFO L225 Difference]: With dead ends: 49 [2023-11-21 20:58:12,041 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 20:58:12,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:58:12,042 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:12,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 120 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 20:58:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 20:58:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-21 20:58:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.75) internal successors, (49), 44 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-11-21 20:58:12,048 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 13 [2023-11-21 20:58:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:12,048 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-11-21 20:58:12,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-11-21 20:58:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 20:58:12,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:12,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:12,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 20:58:12,050 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:12,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:12,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1280572993, now seen corresponding path program 1 times [2023-11-21 20:58:12,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:12,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816667110] [2023-11-21 20:58:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:12,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:12,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:12,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816667110] [2023-11-21 20:58:12,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816667110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:12,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:12,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 20:58:12,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267415860] [2023-11-21 20:58:12,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:12,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 20:58:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:12,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 20:58:12,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:12,186 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:12,316 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2023-11-21 20:58:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:58:12,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-21 20:58:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:12,317 INFO L225 Difference]: With dead ends: 52 [2023-11-21 20:58:12,318 INFO L226 Difference]: Without dead ends: 52 [2023-11-21 20:58:12,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:58:12,319 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:12,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 162 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-21 20:58:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2023-11-21 20:58:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-11-21 20:58:12,324 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 14 [2023-11-21 20:58:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:12,324 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-11-21 20:58:12,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-11-21 20:58:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 20:58:12,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:12,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:12,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 20:58:12,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:12,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:12,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1092820800, now seen corresponding path program 1 times [2023-11-21 20:58:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:12,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197047116] [2023-11-21 20:58:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:12,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:12,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197047116] [2023-11-21 20:58:12,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197047116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:12,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619782090] [2023-11-21 20:58:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:12,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:12,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:12,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:12,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:58:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 20:58:12,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:13,143 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-21 20:58:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:13,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 20:58:13,221 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:13,221 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 11 treesize of output 11 [2023-11-21 20:58:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:13,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:13,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619782090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:13,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:13,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-11-21 20:58:13,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328510267] [2023-11-21 20:58:13,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:13,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:58:13,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:13,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:58:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=147, Unknown=1, NotChecked=24, Total=210 [2023-11-21 20:58:13,252 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:13,390 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-11-21 20:58:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-21 20:58:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:13,392 INFO L225 Difference]: With dead ends: 61 [2023-11-21 20:58:13,392 INFO L226 Difference]: Without dead ends: 61 [2023-11-21 20:58:13,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=147, Unknown=1, NotChecked=24, Total=210 [2023-11-21 20:58:13,394 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:13,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 73 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2023-11-21 20:58:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-21 20:58:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2023-11-21 20:58:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-21 20:58:13,413 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 15 [2023-11-21 20:58:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:13,414 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-21 20:58:13,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-21 20:58:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 20:58:13,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:13,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:13,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:13,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:13,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1092820799, now seen corresponding path program 1 times [2023-11-21 20:58:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:13,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413376835] [2023-11-21 20:58:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:13,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413376835] [2023-11-21 20:58:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413376835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894144264] [2023-11-21 20:58:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:13,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:13,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:13,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:58:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:14,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 20:58:14,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:14,069 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-21 20:58:14,101 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 20:58:14,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 20:58:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:14,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:14,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894144264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:14,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:14,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-21 20:58:14,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123395237] [2023-11-21 20:58:14,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:14,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2023-11-21 20:58:14,113 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:14,177 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2023-11-21 20:58:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-21 20:58:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:14,178 INFO L225 Difference]: With dead ends: 56 [2023-11-21 20:58:14,179 INFO L226 Difference]: Without dead ends: 56 [2023-11-21 20:58:14,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2023-11-21 20:58:14,181 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:14,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 49 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2023-11-21 20:58:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-21 20:58:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-21 20:58:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2023-11-21 20:58:14,190 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 15 [2023-11-21 20:58:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:14,190 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2023-11-21 20:58:14,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2023-11-21 20:58:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 20:58:14,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:14,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:14,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:14,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:14,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:14,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:14,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1042665444, now seen corresponding path program 1 times [2023-11-21 20:58:14,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:14,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450086137] [2023-11-21 20:58:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:14,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:15,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450086137] [2023-11-21 20:58:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450086137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746054342] [2023-11-21 20:58:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:15,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:15,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:15,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 20:58:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:15,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-21 20:58:15,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:15,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 20:58:15,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 20:58:15,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-21 20:58:15,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-21 20:58:15,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 [2023-11-21 20:58:15,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-21 20:58:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:15,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:15,572 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4)) (.cse0 (+ 12 |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_321 (Array Int Int))) (or (not (= v_ArrVal_321 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_321 .cse0)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_321) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) 0))) (forall ((v_ArrVal_320 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_320) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) 0) (not (= v_ArrVal_320 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_320 .cse0)))))))) is different from false [2023-11-21 20:58:15,637 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4)) (.cse0 (+ 12 |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_320 (Array Int Int))) (or (not (= (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_320 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse0 (select v_ArrVal_320 .cse0)) v_ArrVal_320)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_320) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) 0))) (forall ((v_ArrVal_321 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_321) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) 0) (not (= v_ArrVal_321 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_321 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse0 (select v_ArrVal_321 .cse0)))))))) is different from false [2023-11-21 20:58:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746054342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:15,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:15,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 17 [2023-11-21 20:58:15,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407725930] [2023-11-21 20:58:15,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:15,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 20:58:15,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:15,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 20:58:15,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=177, Unknown=2, NotChecked=54, Total=272 [2023-11-21 20:58:15,740 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 20:58:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:16,013 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-11-21 20:58:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:58:16,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-11-21 20:58:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:16,014 INFO L225 Difference]: With dead ends: 57 [2023-11-21 20:58:16,014 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 20:58:16,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=202, Unknown=2, NotChecked=58, Total=306 [2023-11-21 20:58:16,015 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:16,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 253 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2023-11-21 20:58:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 20:58:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-21 20:58:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 52 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-11-21 20:58:16,028 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 15 [2023-11-21 20:58:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:16,028 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-11-21 20:58:16,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 20:58:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-11-21 20:58:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 20:58:16,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:16,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:16,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:16,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:16,241 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:16,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2037095241, now seen corresponding path program 1 times [2023-11-21 20:58:16,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:16,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161795701] [2023-11-21 20:58:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:16,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:16,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:16,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161795701] [2023-11-21 20:58:16,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161795701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:16,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:16,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 20:58:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980867709] [2023-11-21 20:58:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:16,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 20:58:16,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 20:58:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:58:16,380 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:16,527 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2023-11-21 20:58:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:58:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-21 20:58:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:16,528 INFO L225 Difference]: With dead ends: 66 [2023-11-21 20:58:16,528 INFO L226 Difference]: Without dead ends: 66 [2023-11-21 20:58:16,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 20:58:16,529 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:16,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 135 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-21 20:58:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2023-11-21 20:58:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2023-11-21 20:58:16,534 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 16 [2023-11-21 20:58:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:16,534 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2023-11-21 20:58:16,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2023-11-21 20:58:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 20:58:16,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:16,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:16,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 20:58:16,536 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:16,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:16,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2037096557, now seen corresponding path program 1 times [2023-11-21 20:58:16,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:16,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573082173] [2023-11-21 20:58:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:16,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573082173] [2023-11-21 20:58:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573082173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550781222] [2023-11-21 20:58:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:16,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:16,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:16,626 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:16,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 20:58:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 20:58:16,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:16,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:16,778 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 20:58:16,778 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 12 treesize of output 11 [2023-11-21 20:58:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550781222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:16,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:16,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-21 20:58:16,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034096520] [2023-11-21 20:58:16,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:16,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:16,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:16,795 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:16,918 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-11-21 20:58:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-21 20:58:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:16,921 INFO L225 Difference]: With dead ends: 67 [2023-11-21 20:58:16,922 INFO L226 Difference]: Without dead ends: 67 [2023-11-21 20:58:16,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:16,923 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:16,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-21 20:58:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2023-11-21 20:58:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.631578947368421) internal successors, (62), 53 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-11-21 20:58:16,929 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 16 [2023-11-21 20:58:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:16,930 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-11-21 20:58:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-11-21 20:58:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 20:58:16,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:16,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:16,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:17,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 20:58:17,149 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:17,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2037096556, now seen corresponding path program 1 times [2023-11-21 20:58:17,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:17,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904097236] [2023-11-21 20:58:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:17,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:17,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:17,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:17,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904097236] [2023-11-21 20:58:17,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904097236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:17,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:17,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 20:58:17,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401255619] [2023-11-21 20:58:17,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:17,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 20:58:17,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 20:58:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:58:17,399 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:17,673 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2023-11-21 20:58:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:58:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-21 20:58:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:17,674 INFO L225 Difference]: With dead ends: 75 [2023-11-21 20:58:17,674 INFO L226 Difference]: Without dead ends: 75 [2023-11-21 20:58:17,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 20:58:17,675 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:17,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 94 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 20:58:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-21 20:58:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2023-11-21 20:58:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-11-21 20:58:17,679 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 16 [2023-11-21 20:58:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:17,679 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-11-21 20:58:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-11-21 20:58:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 20:58:17,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:17,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:17,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 20:58:17,681 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:17,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2066117182, now seen corresponding path program 1 times [2023-11-21 20:58:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:17,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781042005] [2023-11-21 20:58:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:17,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:17,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 20:58:17,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781042005] [2023-11-21 20:58:17,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781042005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:17,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451328510] [2023-11-21 20:58:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:17,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:58:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:58:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:17,824 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 20:58:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:17,967 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2023-11-21 20:58:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-21 20:58:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:17,969 INFO L225 Difference]: With dead ends: 60 [2023-11-21 20:58:17,969 INFO L226 Difference]: Without dead ends: 60 [2023-11-21 20:58:17,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:17,969 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:17,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-21 20:58:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-21 20:58:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-11-21 20:58:17,973 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 17 [2023-11-21 20:58:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:17,973 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-11-21 20:58:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 20:58:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-11-21 20:58:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 20:58:17,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:17,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:17,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 20:58:17,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:17,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2066117181, now seen corresponding path program 1 times [2023-11-21 20:58:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:17,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797046711] [2023-11-21 20:58:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797046711] [2023-11-21 20:58:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797046711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 20:58:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052901360] [2023-11-21 20:58:18,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 20:58:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 20:58:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:18,246 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 20:58:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:18,417 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2023-11-21 20:58:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:58:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-21 20:58:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:18,418 INFO L225 Difference]: With dead ends: 59 [2023-11-21 20:58:18,418 INFO L226 Difference]: Without dead ends: 59 [2023-11-21 20:58:18,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-21 20:58:18,419 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:18,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 115 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-21 20:58:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-21 20:58:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 54 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-11-21 20:58:18,423 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 17 [2023-11-21 20:58:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:18,423 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-11-21 20:58:18,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 20:58:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-11-21 20:58:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 20:58:18,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:18,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:18,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 20:58:18,425 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:18,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 855324623, now seen corresponding path program 1 times [2023-11-21 20:58:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:18,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626201034] [2023-11-21 20:58:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:18,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:18,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626201034] [2023-11-21 20:58:18,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626201034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:18,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:18,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 20:58:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921781885] [2023-11-21 20:58:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:18,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 20:58:18,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:18,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 20:58:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:58:18,600 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:18,787 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2023-11-21 20:58:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:58:18,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-21 20:58:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:18,789 INFO L225 Difference]: With dead ends: 63 [2023-11-21 20:58:18,789 INFO L226 Difference]: Without dead ends: 63 [2023-11-21 20:58:18,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 20:58:18,790 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:18,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 20:58:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-21 20:58:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-11-21 20:58:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-11-21 20:58:18,794 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 18 [2023-11-21 20:58:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:18,795 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-11-21 20:58:18,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-11-21 20:58:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 20:58:18,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:18,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:18,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 20:58:18,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1263640471, now seen corresponding path program 1 times [2023-11-21 20:58:18,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:18,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717853003] [2023-11-21 20:58:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:18,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:19,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:19,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:19,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717853003] [2023-11-21 20:58:19,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717853003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720486685] [2023-11-21 20:58:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:19,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:19,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:19,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:19,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 20:58:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:19,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-21 20:58:19,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:19,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 20:58:19,631 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:19,632 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 11 treesize of output 11 [2023-11-21 20:58:19,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 20:58:19,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 20:58:19,801 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:19,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2023-11-21 20:58:19,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-21 20:58:19,829 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 31 treesize of output 13 [2023-11-21 20:58:19,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-21 20:58:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:19,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:19,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720486685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:19,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 20 [2023-11-21 20:58:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949044352] [2023-11-21 20:58:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:19,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 20:58:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 20:58:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-11-21 20:58:19,870 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:20,169 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-11-21 20:58:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 20:58:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-21 20:58:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:20,170 INFO L225 Difference]: With dead ends: 62 [2023-11-21 20:58:20,170 INFO L226 Difference]: Without dead ends: 62 [2023-11-21 20:58:20,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-11-21 20:58:20,171 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:20,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 20:58:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-21 20:58:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2023-11-21 20:58:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 56 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-11-21 20:58:20,174 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 19 [2023-11-21 20:58:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:20,175 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-11-21 20:58:20,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-11-21 20:58:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 20:58:20,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:20,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:20,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:20,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 20:58:20,389 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:20,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1263640472, now seen corresponding path program 1 times [2023-11-21 20:58:20,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:20,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879443474] [2023-11-21 20:58:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:20,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879443474] [2023-11-21 20:58:20,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879443474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:20,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:20,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-21 20:58:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836905614] [2023-11-21 20:58:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:20,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 20:58:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 20:58:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-21 20:58:20,775 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:21,050 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-11-21 20:58:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 20:58:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-21 20:58:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:21,051 INFO L225 Difference]: With dead ends: 61 [2023-11-21 20:58:21,051 INFO L226 Difference]: Without dead ends: 61 [2023-11-21 20:58:21,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-21 20:58:21,052 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:21,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 131 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 20:58:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-21 20:58:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-21 20:58:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.441860465116279) internal successors, (62), 56 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-11-21 20:58:21,056 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 19 [2023-11-21 20:58:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:21,056 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-11-21 20:58:21,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-11-21 20:58:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 20:58:21,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:21,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:21,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 20:58:21,057 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:21,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1064996265, now seen corresponding path program 1 times [2023-11-21 20:58:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086063886] [2023-11-21 20:58:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:21,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:21,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086063886] [2023-11-21 20:58:21,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086063886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:21,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217234222] [2023-11-21 20:58:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:21,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:21,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:21,277 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:21,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 20:58:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:21,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 20:58:21,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:21,480 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 13 treesize of output 9 [2023-11-21 20:58:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:21,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:21,570 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_21| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_21|) 0)) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_21| 0)))) is different from false [2023-11-21 20:58:21,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217234222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:21,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:58:21,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2023-11-21 20:58:21,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500754143] [2023-11-21 20:58:21,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:21,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 20:58:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 20:58:21,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=110, Unknown=1, NotChecked=20, Total=156 [2023-11-21 20:58:21,575 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:21,914 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2023-11-21 20:58:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 20:58:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-21 20:58:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:21,916 INFO L225 Difference]: With dead ends: 73 [2023-11-21 20:58:21,916 INFO L226 Difference]: Without dead ends: 72 [2023-11-21 20:58:21,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=175, Unknown=1, NotChecked=26, Total=240 [2023-11-21 20:58:21,917 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:21,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 20:58:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-21 20:58:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2023-11-21 20:58:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 59 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2023-11-21 20:58:21,921 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 21 [2023-11-21 20:58:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:21,921 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2023-11-21 20:58:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 20:58:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2023-11-21 20:58:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 20:58:21,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:21,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:21,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:22,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:22,123 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:22,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:22,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1064997581, now seen corresponding path program 1 times [2023-11-21 20:58:22,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:22,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298486248] [2023-11-21 20:58:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:22,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:22,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298486248] [2023-11-21 20:58:22,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298486248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715153539] [2023-11-21 20:58:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:22,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:22,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:22,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 20:58:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-21 20:58:22,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:22,690 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 11 treesize of output 7 [2023-11-21 20:58:22,695 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 11 treesize of output 7 [2023-11-21 20:58:22,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 20:58:22,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 20:58:22,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 20:58:22,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 20:58:22,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:22,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 20:58:22,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:22,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 20:58:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:22,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:23,126 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 12 |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_824 (Array Int Int))) (or (not (= v_ArrVal_824 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_824 .cse0)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_824) |c_ULTIMATE.start_create_~sll~0#1.base|) 4) 0))) (forall ((v_ArrVal_825 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_825) |c_ULTIMATE.start_create_~sll~0#1.base|) 4) 0) (not (= v_ArrVal_825 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_825 .cse0)))))))) is different from false [2023-11-21 20:58:23,217 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 12 |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_824 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_824) |c_ULTIMATE.start_create_~sll~0#1.base|) 4) 0) (not (= v_ArrVal_824 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_824 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse0 (select v_ArrVal_824 .cse0)))))) (forall ((v_ArrVal_825 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_825) |c_ULTIMATE.start_create_~sll~0#1.base|) 4) 0) (not (= v_ArrVal_825 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_825 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse0 (select v_ArrVal_825 .cse0)))))))) is different from false [2023-11-21 20:58:23,441 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 20 treesize of output 18 [2023-11-21 20:58:23,445 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 226 treesize of output 222 [2023-11-21 20:58:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:23,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715153539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:23,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:23,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2023-11-21 20:58:23,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916147998] [2023-11-21 20:58:23,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:23,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-21 20:58:23,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:23,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-21 20:58:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=414, Unknown=2, NotChecked=82, Total=552 [2023-11-21 20:58:23,456 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 24 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 20:58:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:24,134 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2023-11-21 20:58:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 20:58:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-11-21 20:58:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:24,136 INFO L225 Difference]: With dead ends: 80 [2023-11-21 20:58:24,136 INFO L226 Difference]: Without dead ends: 70 [2023-11-21 20:58:24,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=727, Unknown=2, NotChecked=110, Total=930 [2023-11-21 20:58:24,137 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:24,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 319 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 559 Invalid, 0 Unknown, 110 Unchecked, 0.4s Time] [2023-11-21 20:58:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-21 20:58:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2023-11-21 20:58:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.5) internal successors, (66), 57 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2023-11-21 20:58:24,141 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 21 [2023-11-21 20:58:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:24,141 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2023-11-21 20:58:24,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 20:58:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2023-11-21 20:58:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 20:58:24,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:24,142 INFO L195 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] [2023-11-21 20:58:24,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:24,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:24,343 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:24,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash 604058841, now seen corresponding path program 1 times [2023-11-21 20:58:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303873133] [2023-11-21 20:58:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 20:58:24,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303873133] [2023-11-21 20:58:24,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303873133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566447344] [2023-11-21 20:58:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:24,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:24,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:24,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:24,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 20:58:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 20:58:24,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 20:58:24,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:24,706 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 20:58:24,707 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 12 treesize of output 11 [2023-11-21 20:58:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 20:58:24,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566447344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:24,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:24,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2023-11-21 20:58:24,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103353991] [2023-11-21 20:58:24,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:24,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:58:24,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:24,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:58:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:24,728 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:24,862 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2023-11-21 20:58:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-21 20:58:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:24,864 INFO L225 Difference]: With dead ends: 69 [2023-11-21 20:58:24,864 INFO L226 Difference]: Without dead ends: 69 [2023-11-21 20:58:24,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:24,865 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:24,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-21 20:58:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-11-21 20:58:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.489795918367347) internal successors, (73), 62 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2023-11-21 20:58:24,870 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 25 [2023-11-21 20:58:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:24,870 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2023-11-21 20:58:24,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 20:58:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2023-11-21 20:58:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 20:58:24,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:24,872 INFO L195 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] [2023-11-21 20:58:24,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:25,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:25,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:25,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 604058842, now seen corresponding path program 1 times [2023-11-21 20:58:25,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:25,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234971048] [2023-11-21 20:58:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:25,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:25,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234971048] [2023-11-21 20:58:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234971048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138757032] [2023-11-21 20:58:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:25,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:25,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:25,476 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:25,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 20:58:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-21 20:58:25,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:25,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:25,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:25,984 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 21 treesize of output 25 [2023-11-21 20:58:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138757032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:26,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-11-21 20:58:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353189405] [2023-11-21 20:58:26,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 20:58:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 20:58:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-11-21 20:58:26,167 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 22 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 20:58:26,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:26,389 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-11-21 20:58:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 20:58:26,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25 [2023-11-21 20:58:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:26,391 INFO L225 Difference]: With dead ends: 68 [2023-11-21 20:58:26,391 INFO L226 Difference]: Without dead ends: 68 [2023-11-21 20:58:26,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-11-21 20:58:26,392 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:26,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 245 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 20:58:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-21 20:58:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-11-21 20:58:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.469387755102041) internal successors, (72), 62 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-11-21 20:58:26,396 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 25 [2023-11-21 20:58:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:26,396 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-11-21 20:58:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 20:58:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-11-21 20:58:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 20:58:26,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:26,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:26,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:26,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-21 20:58:26,621 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:26,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash 730170175, now seen corresponding path program 1 times [2023-11-21 20:58:26,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:26,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941989195] [2023-11-21 20:58:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:26,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:27,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:27,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 20:58:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 20:58:27,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:27,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941989195] [2023-11-21 20:58:27,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941989195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:27,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505383014] [2023-11-21 20:58:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:27,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:27,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:27,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:27,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 20:58:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:27,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-21 20:58:27,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:27,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 20:58:28,026 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:28,027 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 11 treesize of output 11 [2023-11-21 20:58:28,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 20:58:28,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 20:58:28,157 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:28,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2023-11-21 20:58:28,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-21 20:58:28,237 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:28,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2023-11-21 20:58:28,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-21 20:58:28,264 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 42 treesize of output 18 [2023-11-21 20:58:28,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-21 20:58:28,320 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-21 20:58:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:28,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 20:58:28,344 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:28,344 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 11 treesize of output 11 [2023-11-21 20:58:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-21 20:58:28,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505383014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:28,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:58:28,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2023-11-21 20:58:28,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990765918] [2023-11-21 20:58:28,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 20:58:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 20:58:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-11-21 20:58:28,511 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 20:58:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:29,307 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-11-21 20:58:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 20:58:29,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 27 [2023-11-21 20:58:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:29,309 INFO L225 Difference]: With dead ends: 62 [2023-11-21 20:58:29,309 INFO L226 Difference]: Without dead ends: 62 [2023-11-21 20:58:29,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=1035, Unknown=1, NotChecked=66, Total=1260 [2023-11-21 20:58:29,310 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:29,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 252 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 572 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2023-11-21 20:58:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-21 20:58:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-21 20:58:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-11-21 20:58:29,313 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 27 [2023-11-21 20:58:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:29,314 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-11-21 20:58:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 20:58:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-11-21 20:58:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 20:58:29,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:29,315 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:29,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:29,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-21 20:58:29,525 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:29,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:29,525 INFO L85 PathProgramCache]: Analyzing trace with hash 730170174, now seen corresponding path program 1 times [2023-11-21 20:58:29,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:29,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283673413] [2023-11-21 20:58:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:29,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:30,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:30,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 20:58:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 20:58:30,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:30,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283673413] [2023-11-21 20:58:30,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283673413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:30,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895256904] [2023-11-21 20:58:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:30,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:30,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:30,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:30,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 20:58:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:30,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-21 20:58:30,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:30,522 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:30,523 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 11 treesize of output 11 [2023-11-21 20:58:30,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 20:58:30,616 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:30,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-21 20:58:30,680 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:30,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-21 20:58:30,692 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 31 treesize of output 13 [2023-11-21 20:58:30,712 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-21 20:58:30,740 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 20:58:30,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 20:58:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-11-21 20:58:30,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:30,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895256904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:30,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:58:30,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2023-11-21 20:58:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692118123] [2023-11-21 20:58:30,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:30,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 20:58:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 20:58:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=442, Unknown=1, NotChecked=42, Total=552 [2023-11-21 20:58:30,809 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 20:58:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:31,140 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-11-21 20:58:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 20:58:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 27 [2023-11-21 20:58:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:31,141 INFO L225 Difference]: With dead ends: 61 [2023-11-21 20:58:31,141 INFO L226 Difference]: Without dead ends: 61 [2023-11-21 20:58:31,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=647, Unknown=1, NotChecked=52, Total=812 [2023-11-21 20:58:31,143 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:31,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 176 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2023-11-21 20:58:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-21 20:58:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-21 20:58:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.346938775510204) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2023-11-21 20:58:31,145 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 27 [2023-11-21 20:58:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:31,146 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2023-11-21 20:58:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 20:58:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2023-11-21 20:58:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 20:58:31,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:31,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:31,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:31,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-21 20:58:31,357 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:31,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash 680014819, now seen corresponding path program 1 times [2023-11-21 20:58:31,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:31,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159274837] [2023-11-21 20:58:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:31,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:32,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:32,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:32,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159274837] [2023-11-21 20:58:32,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159274837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:32,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341069452] [2023-11-21 20:58:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:32,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:32,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:32,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 20:58:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:32,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-21 20:58:32,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:32,695 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:32,695 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 11 treesize of output 11 [2023-11-21 20:58:32,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 20:58:32,851 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:32,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-11-21 20:58:32,904 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:32,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-21 20:58:33,011 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 31 treesize of output 13 [2023-11-21 20:58:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:33,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:33,099 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-21 20:58:33,099 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 21 treesize of output 20 [2023-11-21 20:58:33,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:33,380 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 44 [2023-11-21 20:58:33,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:33,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 253 [2023-11-21 20:58:33,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:33,412 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 82 treesize of output 63 [2023-11-21 20:58:33,420 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 80 treesize of output 68 [2023-11-21 20:58:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341069452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:33,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:58:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-21 20:58:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175403869] [2023-11-21 20:58:33,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:33,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 20:58:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 20:58:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=966, Unknown=44, NotChecked=0, Total=1122 [2023-11-21 20:58:33,634 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 20:58:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:34,388 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-11-21 20:58:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 20:58:34,389 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-11-21 20:58:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:34,389 INFO L225 Difference]: With dead ends: 65 [2023-11-21 20:58:34,390 INFO L226 Difference]: Without dead ends: 65 [2023-11-21 20:58:34,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=1477, Unknown=47, NotChecked=0, Total=1722 [2023-11-21 20:58:34,391 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:34,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 312 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:58:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-21 20:58:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-21 20:58:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 58 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-11-21 20:58:34,395 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 27 [2023-11-21 20:58:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:34,395 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-11-21 20:58:34,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 20:58:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-11-21 20:58:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 20:58:34,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:34,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:34,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:34,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-21 20:58:34,620 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:34,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash 680014820, now seen corresponding path program 1 times [2023-11-21 20:58:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224148952] [2023-11-21 20:58:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:34,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:35,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:35,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:35,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:35,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224148952] [2023-11-21 20:58:35,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224148952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:35,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816879454] [2023-11-21 20:58:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:35,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:35,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:35,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:35,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 20:58:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:35,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-21 20:58:35,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:36,173 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:36,173 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 11 treesize of output 11 [2023-11-21 20:58:36,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 20:58:36,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 20:58:36,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:36,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 36 [2023-11-21 20:58:36,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-21 20:58:36,465 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 20:58:36,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2023-11-21 20:58:36,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-21 20:58:36,626 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 31 treesize of output 13 [2023-11-21 20:58:36,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-21 20:58:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:36,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:36,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:36,853 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 48 treesize of output 52 [2023-11-21 20:58:36,897 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4))) (and (forall ((v_prenex_3 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem11#1.base| v_prenex_3) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0) 4))) (forall ((v_ArrVal_1551 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1551) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0) (+ 5 |c_ULTIMATE.start_create_#t~mem11#1.offset|))) (forall ((v_ArrVal_1552 (Array Int Int))) (= |c_ULTIMATE.start_create_#t~mem11#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1552) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0))))) is different from false [2023-11-21 20:58:36,919 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse2)) (.cse1 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4))) (and (forall ((v_prenex_3 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_3) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) 4))) (forall ((v_ArrVal_1551 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1551) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) (+ 5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse2)))) (forall ((v_ArrVal_1552 (Array Int Int))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1552) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1)))))) is different from false [2023-11-21 20:58:36,965 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base|)) (.cse3 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4)) (.cse2 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4))) (and (forall ((v_ArrVal_1549 (Array Int Int))) (or (forall ((v_ArrVal_1552 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1549))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) .cse3))) (= .cse0 (select (select (store .cse1 .cse0 v_ArrVal_1552) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2))))) (not (= (store .cse4 |c_ULTIMATE.start_create_#t~mem9#1.offset| (select v_ArrVal_1549 |c_ULTIMATE.start_create_#t~mem9#1.offset|)) v_ArrVal_1549)))) (forall ((v_ArrVal_1549 (Array Int Int))) (or (not (= (store .cse4 |c_ULTIMATE.start_create_#t~mem9#1.offset| (select v_ArrVal_1549 |c_ULTIMATE.start_create_#t~mem9#1.offset|)) v_ArrVal_1549)) (forall ((v_ArrVal_1551 (Array Int Int)) (v_ArrVal_1550 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1550))) (< (select (select (store .cse5 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1549) |c_ULTIMATE.start_create_~now~0#1.base|) .cse3) v_ArrVal_1551) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2) (+ 5 (select (select .cse5 |c_ULTIMATE.start_create_~now~0#1.base|) .cse3))))))) (forall ((v_ArrVal_1549 (Array Int Int))) (or (not (= (store .cse4 |c_ULTIMATE.start_create_#t~mem9#1.offset| (select v_ArrVal_1549 |c_ULTIMATE.start_create_#t~mem9#1.offset|)) v_ArrVal_1549)) (forall ((v_ArrVal_1550 (Array Int Int)) (v_prenex_3 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1550) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1549) |c_ULTIMATE.start_create_~now~0#1.base|) .cse3) v_prenex_3) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2) 4))))))) is different from false [2023-11-21 20:58:39,050 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse4))) (let ((.cse6 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse4)) (.cse0 (select |c_#memory_$Pointer$.base| .cse5)) (.cse3 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_29| Int)) (or (forall ((v_ArrVal_1549 (Array Int Int))) (or (not (= v_ArrVal_1549 (store .cse0 |v_ULTIMATE.start_create_#t~mem9#1.offset_29| (select v_ArrVal_1549 |v_ULTIMATE.start_create_#t~mem9#1.offset_29|)))) (forall ((v_ArrVal_1552 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse5 v_ArrVal_1549))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) .cse4))) (= (select (select (store .cse1 .cse2 v_ArrVal_1552) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse3) .cse2)))))) (< .cse6 |v_ULTIMATE.start_create_#t~mem9#1.offset_29|))) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_29| Int)) (or (< .cse6 |v_ULTIMATE.start_create_#t~mem9#1.offset_29|) (forall ((v_ArrVal_1549 (Array Int Int))) (or (not (= v_ArrVal_1549 (store .cse0 |v_ULTIMATE.start_create_#t~mem9#1.offset_29| (select v_ArrVal_1549 |v_ULTIMATE.start_create_#t~mem9#1.offset_29|)))) (forall ((v_ArrVal_1550 (Array Int Int)) (v_prenex_3 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse5 v_ArrVal_1550) (select (select (store |c_#memory_$Pointer$.base| .cse5 v_ArrVal_1549) |c_ULTIMATE.start_create_~now~0#1.base|) .cse4) v_prenex_3) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse3) 4))))))) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_29| Int)) (or (< .cse6 |v_ULTIMATE.start_create_#t~mem9#1.offset_29|) (forall ((v_ArrVal_1549 (Array Int Int))) (or (not (= v_ArrVal_1549 (store .cse0 |v_ULTIMATE.start_create_#t~mem9#1.offset_29| (select v_ArrVal_1549 |v_ULTIMATE.start_create_#t~mem9#1.offset_29|)))) (forall ((v_ArrVal_1551 (Array Int Int)) (v_ArrVal_1550 (Array Int Int))) (let ((.cse7 (store |c_#memory_$Pointer$.offset| .cse5 v_ArrVal_1550))) (< (select (select (store .cse7 (select (select (store |c_#memory_$Pointer$.base| .cse5 v_ArrVal_1549) |c_ULTIMATE.start_create_~now~0#1.base|) .cse4) v_ArrVal_1551) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse3) (+ (select (select .cse7 |c_ULTIMATE.start_create_~now~0#1.base|) .cse4) 5)))))))))))) is different from false [2023-11-21 20:58:39,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:39,105 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2023-11-21 20:58:39,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:39,118 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 57 [2023-11-21 20:58:39,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:39,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 95 [2023-11-21 20:58:39,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:39,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 668 treesize of output 565 [2023-11-21 20:58:39,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:39,220 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 174 treesize of output 158 [2023-11-21 20:58:39,234 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 150 treesize of output 134 [2023-11-21 20:58:39,903 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 8 treesize of output 4 [2023-11-21 20:58:39,915 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 82 treesize of output 70 [2023-11-21 20:58:39,979 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-21 20:58:39,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 1 [2023-11-21 20:58:39,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:39,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2023-11-21 20:58:40,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:40,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 48 [2023-11-21 20:58:40,019 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 20:58:40,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-21 20:58:40,035 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 20:58:40,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 20:58:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:40,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-21 20:58:40,049 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 8 treesize of output 4 [2023-11-21 20:58:40,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816879454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:40,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:58:40,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-11-21 20:58:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558328670] [2023-11-21 20:58:40,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:40,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-21 20:58:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-21 20:58:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1213, Unknown=4, NotChecked=292, Total=1640 [2023-11-21 20:58:40,358 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 20:58:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:41,554 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2023-11-21 20:58:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 20:58:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-11-21 20:58:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:41,555 INFO L225 Difference]: With dead ends: 64 [2023-11-21 20:58:41,556 INFO L226 Difference]: Without dead ends: 64 [2023-11-21 20:58:41,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=198, Invalid=1620, Unknown=4, NotChecked=340, Total=2162 [2023-11-21 20:58:41,558 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:41,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 354 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 20:58:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-21 20:58:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-11-21 20:58:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2023-11-21 20:58:41,561 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 27 [2023-11-21 20:58:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:41,561 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-11-21 20:58:41,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 20:58:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2023-11-21 20:58:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 20:58:41,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:41,562 INFO L195 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] [2023-11-21 20:58:41,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:41,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-21 20:58:41,763 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:41,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash -394364043, now seen corresponding path program 1 times [2023-11-21 20:58:41,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:41,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774091924] [2023-11-21 20:58:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:41,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:42,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:42,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:42,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:42,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774091924] [2023-11-21 20:58:42,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774091924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:42,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64018484] [2023-11-21 20:58:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:42,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:42,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:42,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:42,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 20:58:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:42,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-21 20:58:42,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:42,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:43,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 20:58:43,053 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 15 treesize of output 19 [2023-11-21 20:58:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:43,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64018484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:43,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:43,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2023-11-21 20:58:43,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144042700] [2023-11-21 20:58:43,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:43,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 20:58:43,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:43,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 20:58:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-11-21 20:58:43,347 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 27 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-21 20:58:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:44,037 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2023-11-21 20:58:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 20:58:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 28 [2023-11-21 20:58:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:44,038 INFO L225 Difference]: With dead ends: 89 [2023-11-21 20:58:44,038 INFO L226 Difference]: Without dead ends: 89 [2023-11-21 20:58:44,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2023-11-21 20:58:44,040 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:44,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 167 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 20:58:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-21 20:58:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2023-11-21 20:58:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 20:58:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2023-11-21 20:58:44,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2023-11-21 20:58:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:44,044 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2023-11-21 20:58:44,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-21 20:58:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2023-11-21 20:58:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 20:58:44,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:44,045 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:44,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:44,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-21 20:58:44,261 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-21 20:58:44,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash 659265645, now seen corresponding path program 2 times [2023-11-21 20:58:44,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:44,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701961436] [2023-11-21 20:58:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:44,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 20:58:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:46,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 20:58:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:58:46,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:46,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701961436] [2023-11-21 20:58:46,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701961436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:46,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594975933] [2023-11-21 20:58:46,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:58:46,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:46,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:46,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:46,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46967083-66b6-429d-9407-1ea306719723/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 20:58:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:58:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:58:46,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-21 20:58:46,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:46,597 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 6 treesize of output 5 [2023-11-21 20:58:46,943 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 11 treesize of output 7 [2023-11-21 20:58:46,954 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 11 treesize of output 7 [2023-11-21 20:58:47,000 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 20:58:47,000 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 11 treesize of output 11 [2023-11-21 20:58:47,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-21 20:58:47,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-21 20:58:47,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:47,400 INFO L349 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2023-11-21 20:58:47,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 60 [2023-11-21 20:58:47,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:47,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 29 [2023-11-21 20:58:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:47,614 INFO L349 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2023-11-21 20:58:47,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 68 [2023-11-21 20:58:47,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:58:47,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 29 [2023-11-21 20:58:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:48,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:48,417 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem11#1.base|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem11#1.base|)) (.cse1 (+ |c_ULTIMATE.start_create_#t~mem11#1.offset| 12)) (.cse4 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4))) (and (forall ((v_ArrVal_1778 (Array Int Int))) (or (not (= v_ArrVal_1778 (store .cse0 .cse1 (select v_ArrVal_1778 .cse1)))) (forall ((v_ArrVal_1779 (Array Int Int))) (or (not (= v_ArrVal_1779 (store .cse2 .cse1 (select v_ArrVal_1779 .cse1)))) (= 0 (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1778))) (select (select .cse3 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1779) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse4)) (+ (select (select .cse3 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse4) 4)))))))) (forall ((v_ArrVal_1778 (Array Int Int))) (or (not (= v_ArrVal_1778 (store .cse0 .cse1 (select v_ArrVal_1778 .cse1)))) (forall ((v_ArrVal_1779 (Array Int Int))) (or (not (= v_ArrVal_1779 (store .cse2 .cse1 (select v_ArrVal_1779 .cse1)))) (= (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1779))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse4))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1778) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse4) 4)) 0))))))) is different from false [2023-11-21 20:58:48,482 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse9 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse9))) (let ((.cse2 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4)) (.cse3 (select |c_#memory_$Pointer$.base| .cse1)) (.cse5 (select |c_#memory_$Pointer$.offset| .cse1)) (.cse6 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse9))) (and (forall ((|v_ULTIMATE.start_create_#t~mem11#1.offset_34| Int)) (or (forall ((v_ArrVal_1778 (Array Int Int))) (let ((.cse4 (+ |v_ULTIMATE.start_create_#t~mem11#1.offset_34| 12))) (or (forall ((v_ArrVal_1779 (Array Int Int))) (or (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1778))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1779) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2)) (+ (select (select .cse0 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2) 4))) 0) (not (= (store .cse3 .cse4 (select v_ArrVal_1779 .cse4)) v_ArrVal_1779)))) (not (= (store .cse5 .cse4 (select v_ArrVal_1778 .cse4)) v_ArrVal_1778))))) (< |v_ULTIMATE.start_create_#t~mem11#1.offset_34| .cse6))) (forall ((|v_ULTIMATE.start_create_#t~mem11#1.offset_34| Int)) (or (forall ((v_ArrVal_1778 (Array Int Int))) (let ((.cse8 (+ |v_ULTIMATE.start_create_#t~mem11#1.offset_34| 12))) (or (forall ((v_ArrVal_1779 (Array Int Int))) (or (= (select (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1779))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2))) (+ (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1778) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2) 4)) 0) (not (= (store .cse3 .cse8 (select v_ArrVal_1779 .cse8)) v_ArrVal_1779)))) (not (= (store .cse5 .cse8 (select v_ArrVal_1778 .cse8)) v_ArrVal_1778))))) (< |v_ULTIMATE.start_create_#t~mem11#1.offset_34| .cse6))))))) is different from false [2023-11-21 20:58:49,282 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse8 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse8))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse8)) (.cse1 (select |c_#memory_$Pointer$.base| .cse9)) (.cse7 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4)) (.cse10 (select |c_#memory_$Pointer$.offset| .cse9))) (and (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_34| Int)) (or (< .cse0 |v_ULTIMATE.start_create_#t~mem9#1.offset_34|) (forall ((v_ArrVal_1775 (Array Int Int))) (or (not (= v_ArrVal_1775 (store .cse1 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| (select v_ArrVal_1775 |v_ULTIMATE.start_create_#t~mem9#1.offset_34|)))) (forall ((|v_ULTIMATE.start_create_#t~mem11#1.offset_34| Int) (v_ArrVal_1776 Int)) (let ((.cse2 (store |c_#memory_$Pointer$.offset| .cse9 (store .cse10 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| v_ArrVal_1776)))) (or (forall ((v_ArrVal_1778 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$.base| .cse9 v_ArrVal_1775))) (let ((.cse4 (+ |v_ULTIMATE.start_create_#t~mem11#1.offset_34| 12)) (.cse3 (select (select .cse5 |c_ULTIMATE.start_create_~now~0#1.base|) .cse8))) (or (not (= (store (select .cse2 .cse3) .cse4 (select v_ArrVal_1778 .cse4)) v_ArrVal_1778)) (forall ((v_ArrVal_1779 (Array Int Int))) (or (not (= v_ArrVal_1779 (store (select .cse5 .cse3) .cse4 (select v_ArrVal_1779 .cse4)))) (= (let ((.cse6 (store .cse2 .cse3 v_ArrVal_1778))) (select (select .cse6 (select (select (store .cse5 .cse3 v_ArrVal_1779) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7)) (+ (select (select .cse6 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7) 4))) 0))))))) (< |v_ULTIMATE.start_create_#t~mem11#1.offset_34| (select (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) .cse8))))))))) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_34| Int)) (or (< .cse0 |v_ULTIMATE.start_create_#t~mem9#1.offset_34|) (forall ((v_ArrVal_1775 (Array Int Int))) (or (not (= v_ArrVal_1775 (store .cse1 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| (select v_ArrVal_1775 |v_ULTIMATE.start_create_#t~mem9#1.offset_34|)))) (forall ((|v_ULTIMATE.start_create_#t~mem11#1.offset_34| Int) (v_ArrVal_1776 Int)) (let ((.cse11 (store |c_#memory_$Pointer$.offset| .cse9 (store .cse10 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| v_ArrVal_1776)))) (or (forall ((v_ArrVal_1778 (Array Int Int))) (let ((.cse14 (store |c_#memory_$Pointer$.base| .cse9 v_ArrVal_1775))) (let ((.cse13 (+ |v_ULTIMATE.start_create_#t~mem11#1.offset_34| 12)) (.cse12 (select (select .cse14 |c_ULTIMATE.start_create_~now~0#1.base|) .cse8))) (or (not (= (store (select .cse11 .cse12) .cse13 (select v_ArrVal_1778 .cse13)) v_ArrVal_1778)) (forall ((v_ArrVal_1779 (Array Int Int))) (or (not (= v_ArrVal_1779 (store (select .cse14 .cse12) .cse13 (select v_ArrVal_1779 .cse13)))) (= (select (let ((.cse15 (store .cse14 .cse12 v_ArrVal_1779))) (select .cse15 (select (select .cse15 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7))) (+ (select (select (store .cse11 .cse12 v_ArrVal_1778) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7) 4)) 0))))))) (< |v_ULTIMATE.start_create_#t~mem11#1.offset_34| (select (select .cse11 |c_ULTIMATE.start_create_~now~0#1.base|) .cse8))))))))))))) is different from false [2023-11-21 20:58:49,455 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse2 |c_ULTIMATE.start_create_#t~ret8#1.offset|))) (.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse2 |c_ULTIMATE.start_create_#t~ret8#1.base|)))) (let ((.cse0 (select .cse8 |c_ULTIMATE.start_create_#t~ret8#1.base|)) (.cse7 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 4)) (.cse10 (select .cse9 |c_ULTIMATE.start_create_#t~ret8#1.base|))) (and (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_34| Int)) (or (forall ((v_ArrVal_1775 (Array Int Int))) (or (not (= v_ArrVal_1775 (store .cse0 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| (select v_ArrVal_1775 |v_ULTIMATE.start_create_#t~mem9#1.offset_34|)))) (forall ((|v_ULTIMATE.start_create_#t~mem11#1.offset_34| Int) (v_ArrVal_1776 Int)) (let ((.cse1 (store .cse9 |c_ULTIMATE.start_create_#t~ret8#1.base| (store .cse10 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| v_ArrVal_1776)))) (or (< |v_ULTIMATE.start_create_#t~mem11#1.offset_34| (select (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) .cse2)) (forall ((v_ArrVal_1778 (Array Int Int))) (let ((.cse5 (store .cse8 |c_ULTIMATE.start_create_#t~ret8#1.base| v_ArrVal_1775))) (let ((.cse4 (+ |v_ULTIMATE.start_create_#t~mem11#1.offset_34| 12)) (.cse3 (select (select .cse5 |c_ULTIMATE.start_create_~now~0#1.base|) .cse2))) (or (not (= v_ArrVal_1778 (store (select .cse1 .cse3) .cse4 (select v_ArrVal_1778 .cse4)))) (forall ((v_ArrVal_1779 (Array Int Int))) (or (not (= v_ArrVal_1779 (store (select .cse5 .cse3) .cse4 (select v_ArrVal_1779 .cse4)))) (= (select (let ((.cse6 (store .cse5 .cse3 v_ArrVal_1779))) (select .cse6 (select (select .cse6 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7))) (+ (select (select (store .cse1 .cse3 v_ArrVal_1778) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7) 4)) 0)))))))))))) (< |c_ULTIMATE.start_create_#t~ret8#1.offset| |v_ULTIMATE.start_create_#t~mem9#1.offset_34|))) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_34| Int)) (or (forall ((v_ArrVal_1775 (Array Int Int))) (or (not (= v_ArrVal_1775 (store .cse0 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| (select v_ArrVal_1775 |v_ULTIMATE.start_create_#t~mem9#1.offset_34|)))) (forall ((|v_ULTIMATE.start_create_#t~mem11#1.offset_34| Int) (v_ArrVal_1776 Int)) (let ((.cse14 (store .cse9 |c_ULTIMATE.start_create_#t~ret8#1.base| (store .cse10 |v_ULTIMATE.start_create_#t~mem9#1.offset_34| v_ArrVal_1776)))) (or (forall ((v_ArrVal_1778 (Array Int Int))) (let ((.cse12 (store .cse8 |c_ULTIMATE.start_create_#t~ret8#1.base| v_ArrVal_1775))) (let ((.cse13 (select (select .cse12 |c_ULTIMATE.start_create_~now~0#1.base|) .cse2)) (.cse15 (+ |v_ULTIMATE.start_create_#t~mem11#1.offset_34| 12))) (or (forall ((v_ArrVal_1779 (Array Int Int))) (or (= (let ((.cse11 (store .cse14 .cse13 v_ArrVal_1778))) (select (select .cse11 (select (select (store .cse12 .cse13 v_ArrVal_1779) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7)) (+ (select (select .cse11 |c_ULTIMATE.start_create_~sll~0#1.base|) .cse7) 4))) 0) (not (= v_ArrVal_1779 (store (select .cse12 .cse13) .cse15 (select v_ArrVal_1779 .cse15)))))) (not (= v_ArrVal_1778 (store (select .cse14 .cse13) .cse15 (select v_ArrVal_1778 .cse15)))))))) (< |v_ULTIMATE.start_create_#t~mem11#1.offset_34| (select (select .cse14 |c_ULTIMATE.start_create_~now~0#1.base|) .cse2))))))) (< |c_ULTIMATE.start_create_#t~ret8#1.offset| |v_ULTIMATE.start_create_#t~mem9#1.offset_34|))))))) is different from false [2023-11-21 20:58:50,735 INFO L349 Elim1Store]: treesize reduction 655, result has 39.0 percent of original size [2023-11-21 20:58:50,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 94600 treesize of output 85714