./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 739cfa6985f5cbe3c485b066571ccf0bd5575c5b24975a1e4ae9d10696731379 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:04:52,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:04:52,360 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-06 22:04:52,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:04:52,371 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:04:52,416 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:04:52,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:04:52,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:04:52,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:04:52,424 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:04:52,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:04:52,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:04:52,427 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:04:52,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:04:52,429 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:04:52,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:04:52,430 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:04:52,431 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:04:52,431 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:04:52,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:04:52,432 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:04:52,433 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:04:52,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:04:52,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:04:52,435 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:04:52,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:04:52,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:04:52,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:04:52,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:04:52,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:04:52,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:04:52,439 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:04:52,439 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:04:52,439 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:04:52,440 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:04:52,440 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_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739cfa6985f5cbe3c485b066571ccf0bd5575c5b24975a1e4ae9d10696731379 [2023-11-06 22:04:52,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:04:52,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:04:52,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:04:52,828 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:04:52,829 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:04:52,830 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i [2023-11-06 22:04:56,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:04:56,745 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:04:56,746 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/sv-benchmarks/c/termination-memory-alloca/cstrspn-alloca-2.i [2023-11-06 22:04:56,778 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/data/23f0a86df/95989e38681746629f5520f4499dbedf/FLAGe972d92e5 [2023-11-06 22:04:56,797 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/data/23f0a86df/95989e38681746629f5520f4499dbedf [2023-11-06 22:04:56,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:04:56,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:04:56,805 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:04:56,805 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:04:56,812 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:04:56,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:04:56" (1/1) ... [2023-11-06 22:04:56,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320c99ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:56, skipping insertion in model container [2023-11-06 22:04:56,815 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:04:56" (1/1) ... [2023-11-06 22:04:56,876 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:04:57,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:04:57,277 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:04:57,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:04:57,416 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:04:57,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57 WrapperNode [2023-11-06 22:04:57,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:04:57,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:04:57,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:04:57,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:04:57,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,482 INFO L138 Inliner]: procedures = 111, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-06 22:04:57,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:04:57,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:04:57,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:04:57,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:04:57,504 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,516 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,519 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:04:57,571 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:04:57,571 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:04:57,571 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:04:57,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (1/1) ... [2023-11-06 22:04:57,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:04:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:57,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:04:57,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:04:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:04:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:04:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:04:57,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:04:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:04:57,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:04:57,853 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:04:57,856 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:04:58,225 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:04:58,234 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:04:58,234 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:04:58,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:58 BoogieIcfgContainer [2023-11-06 22:04:58,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:04:58,241 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:04:58,241 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:04:58,246 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:04:58,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:04:56" (1/3) ... [2023-11-06 22:04:58,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4bd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:58, skipping insertion in model container [2023-11-06 22:04:58,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:57" (2/3) ... [2023-11-06 22:04:58,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4bd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:58, skipping insertion in model container [2023-11-06 22:04:58,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:58" (3/3) ... [2023-11-06 22:04:58,252 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-2.i [2023-11-06 22:04:58,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:04:58,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-06 22:04:58,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:04:58,357 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;@64b29416, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:04:58,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-06 22:04:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 22:04:58,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:58,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:04:58,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:04:58,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2023-11-06 22:04:58,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:58,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176270527] [2023-11-06 22:04:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:58,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:58,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:58,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176270527] [2023-11-06 22:04:58,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176270527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:58,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:58,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:04:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036528831] [2023-11-06 22:04:58,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:58,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:04:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:04:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:04:58,995 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:59,068 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-11-06 22:04:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 22:04:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:59,083 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:04:59,083 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:04:59,085 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 [2023-11-06 22:04:59,090 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:59,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:04:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:04:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-06 22:04:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-06 22:04:59,168 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2023-11-06 22:04:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:59,168 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-06 22:04:59,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-06 22:04:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 22:04:59,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:59,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:04:59,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:04:59,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:04:59,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2023-11-06 22:04:59,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:59,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021139465] [2023-11-06 22:04:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:59,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:59,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021139465] [2023-11-06 22:04:59,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021139465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:59,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:59,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:59,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046633092] [2023-11-06 22:04:59,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:59,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:59,675 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:59,822 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2023-11-06 22:04:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:04:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 22:04:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:59,825 INFO L225 Difference]: With dead ends: 72 [2023-11-06 22:04:59,826 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 22:04:59,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:59,828 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:59,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 89 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:04:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 22:04:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 41. [2023-11-06 22:04:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-06 22:04:59,842 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 6 [2023-11-06 22:04:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:59,843 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-06 22:04:59,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-06 22:04:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 22:04:59,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:59,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:04:59,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:04:59,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:04:59,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2023-11-06 22:04:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335046003] [2023-11-06 22:04:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:59,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335046003] [2023-11-06 22:05:00,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335046003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:00,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:00,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:05:00,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726392746] [2023-11-06 22:05:00,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:00,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:05:00,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:00,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:05:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:00,207 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:00,258 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-11-06 22:05:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:05:00,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 22:05:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:00,260 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:05:00,260 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 22:05:00,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:00,262 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:00,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:05:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 22:05:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2023-11-06 22:05:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.75) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-06 22:05:00,277 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 6 [2023-11-06 22:05:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:00,277 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-06 22:05:00,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-06 22:05:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:05:00,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:00,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:00,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:05:00,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:00,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028874, now seen corresponding path program 1 times [2023-11-06 22:05:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:00,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180961260] [2023-11-06 22:05:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:00,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:00,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180961260] [2023-11-06 22:05:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180961260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:00,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:00,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:05:00,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937611699] [2023-11-06 22:05:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:00,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:05:00,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:05:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:00,335 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:00,388 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-06 22:05:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:05:00,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 22:05:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:00,390 INFO L225 Difference]: With dead ends: 36 [2023-11-06 22:05:00,390 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:05:00,391 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 [2023-11-06 22:05:00,403 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:00,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:05:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:05:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-06 22:05:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-06 22:05:00,415 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 7 [2023-11-06 22:05:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:00,416 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-06 22:05:00,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-06 22:05:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:05:00,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:00,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:00,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:05:00,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:00,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028875, now seen corresponding path program 1 times [2023-11-06 22:05:00,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:00,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210120601] [2023-11-06 22:05:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:00,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210120601] [2023-11-06 22:05:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210120601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:00,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:00,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:05:00,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056228779] [2023-11-06 22:05:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:05:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:05:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:05:00,591 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:00,698 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2023-11-06 22:05:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:05:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 22:05:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:00,705 INFO L225 Difference]: With dead ends: 67 [2023-11-06 22:05:00,705 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 22:05:00,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:05:00,710 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:00,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 22:05:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2023-11-06 22:05:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-06 22:05:00,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 7 [2023-11-06 22:05:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:00,720 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-06 22:05:00,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-06 22:05:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:05:00,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:00,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:00,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:05:00,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:00,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1805088457, now seen corresponding path program 1 times [2023-11-06 22:05:00,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:00,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261262077] [2023-11-06 22:05:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261262077] [2023-11-06 22:05:00,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261262077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:00,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:00,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:05:00,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536665981] [2023-11-06 22:05:00,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:00,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:05:00,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:05:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:00,876 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:00,921 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-11-06 22:05:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:05:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 22:05:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:00,923 INFO L225 Difference]: With dead ends: 38 [2023-11-06 22:05:00,923 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:05:00,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:00,925 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:00,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:05:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:05:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2023-11-06 22:05:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-06 22:05:00,931 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 7 [2023-11-06 22:05:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:00,931 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-06 22:05:00,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-06 22:05:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:05:00,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:00,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:00,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:05:00,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:00,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash -534039922, now seen corresponding path program 1 times [2023-11-06 22:05:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576817174] [2023-11-06 22:05:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:00,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576817174] [2023-11-06 22:05:00,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576817174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:00,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:05:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803425823] [2023-11-06 22:05:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:05:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:05:00,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:05:00,993 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:01,084 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-06 22:05:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:05:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 22:05:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:01,086 INFO L225 Difference]: With dead ends: 33 [2023-11-06 22:05:01,086 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 22:05:01,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:01,087 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:01,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 22:05:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 22:05:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-06 22:05:01,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 9 [2023-11-06 22:05:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:01,102 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-06 22:05:01,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-06 22:05:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:05:01,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:01,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:01,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:05:01,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:01,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash -534039921, now seen corresponding path program 1 times [2023-11-06 22:05:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:01,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192056552] [2023-11-06 22:05:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:01,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:01,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192056552] [2023-11-06 22:05:01,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192056552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:01,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:01,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:05:01,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377961600] [2023-11-06 22:05:01,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:01,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:05:01,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:05:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:05:01,323 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:01,428 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-11-06 22:05:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:05:01,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 22:05:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:01,430 INFO L225 Difference]: With dead ends: 54 [2023-11-06 22:05:01,430 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 22:05:01,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:05:01,432 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:01,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 50 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 22:05:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2023-11-06 22:05:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-06 22:05:01,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 9 [2023-11-06 22:05:01,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:01,438 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-06 22:05:01,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-06 22:05:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:05:01,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:01,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:01,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:05:01,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:01,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144940, now seen corresponding path program 1 times [2023-11-06 22:05:01,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:01,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023400532] [2023-11-06 22:05:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:01,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:01,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023400532] [2023-11-06 22:05:01,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023400532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:01,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:01,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:05:01,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324552774] [2023-11-06 22:05:01,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:01,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:05:01,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:05:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:01,523 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:01,598 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-11-06 22:05:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:05:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 22:05:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:01,599 INFO L225 Difference]: With dead ends: 35 [2023-11-06 22:05:01,599 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 22:05:01,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:05:01,601 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:01,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 37 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 22:05:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-11-06 22:05:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-11-06 22:05:01,606 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 13 [2023-11-06 22:05:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:01,606 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-11-06 22:05:01,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-11-06 22:05:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:05:01,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:01,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:01,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:05:01,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:01,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144939, now seen corresponding path program 1 times [2023-11-06 22:05:01,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:01,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166520322] [2023-11-06 22:05:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:01,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:01,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:01,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166520322] [2023-11-06 22:05:01,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166520322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:01,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:01,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:05:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479322196] [2023-11-06 22:05:01,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:01,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:05:01,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:05:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:05:01,878 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:02,062 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-11-06 22:05:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:05:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 22:05:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:02,064 INFO L225 Difference]: With dead ends: 47 [2023-11-06 22:05:02,064 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 22:05:02,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:05:02,065 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 170 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 54 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 22:05:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-11-06 22:05:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.411764705882353) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-11-06 22:05:02,071 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 13 [2023-11-06 22:05:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:02,071 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-11-06 22:05:02,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,072 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-11-06 22:05:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:05:02,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:02,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:02,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:05:02,073 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:02,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:02,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1693161859, now seen corresponding path program 1 times [2023-11-06 22:05:02,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:02,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819851759] [2023-11-06 22:05:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:02,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:02,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819851759] [2023-11-06 22:05:02,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819851759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:02,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:02,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:05:02,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813573167] [2023-11-06 22:05:02,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:02,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:05:02,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:05:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:05:02,234 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:02,263 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-11-06 22:05:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:05:02,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 22:05:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:02,265 INFO L225 Difference]: With dead ends: 39 [2023-11-06 22:05:02,265 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:05:02,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:05:02,267 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:02,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 48 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:05:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:05:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-06 22:05:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-06 22:05:02,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 13 [2023-11-06 22:05:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:02,272 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-06 22:05:02,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-06 22:05:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 22:05:02,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:02,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:02,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:05:02,274 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:02,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash 950889964, now seen corresponding path program 1 times [2023-11-06 22:05:02,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:02,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467599592] [2023-11-06 22:05:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:02,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:02,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:02,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467599592] [2023-11-06 22:05:02,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467599592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:02,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:02,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:05:02,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194978326] [2023-11-06 22:05:02,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:02,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:05:02,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:05:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:02,313 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:02,325 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-11-06 22:05:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:05:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 22:05:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:02,327 INFO L225 Difference]: With dead ends: 38 [2023-11-06 22:05:02,327 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:05:02,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:02,328 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:02,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:05:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:05:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-06 22:05:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-06 22:05:02,333 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 17 [2023-11-06 22:05:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:02,334 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-06 22:05:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-06 22:05:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:05:02,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:02,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:02,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:05:02,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:02,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1028637879, now seen corresponding path program 1 times [2023-11-06 22:05:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073187383] [2023-11-06 22:05:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:02,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:02,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073187383] [2023-11-06 22:05:02,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073187383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:02,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:02,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:05:02,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087601909] [2023-11-06 22:05:02,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:02,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:05:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:02,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:05:02,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:05:02,650 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:02,781 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-11-06 22:05:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:05:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:05:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:02,783 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:05:02,783 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:05:02,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:05:02,784 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:02,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:05:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-06 22:05:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-06 22:05:02,791 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 19 [2023-11-06 22:05:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:02,791 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-06 22:05:02,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-06 22:05:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:05:02,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:02,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:02,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:05:02,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:02,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1677981515, now seen corresponding path program 1 times [2023-11-06 22:05:02,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:02,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342727258] [2023-11-06 22:05:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:02,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:03,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:03,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342727258] [2023-11-06 22:05:03,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342727258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:03,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:03,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:05:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527856374] [2023-11-06 22:05:03,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:05:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:05:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:05:03,158 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:03,391 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2023-11-06 22:05:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:05:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:05:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:03,394 INFO L225 Difference]: With dead ends: 58 [2023-11-06 22:05:03,394 INFO L226 Difference]: Without dead ends: 58 [2023-11-06 22:05:03,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:05:03,396 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:03,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 124 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-06 22:05:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-11-06 22:05:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-11-06 22:05:03,413 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2023-11-06 22:05:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:03,413 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-11-06 22:05:03,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-11-06 22:05:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:05:03,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:03,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:03,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:05:03,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:03,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash 656913161, now seen corresponding path program 1 times [2023-11-06 22:05:03,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:03,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098971089] [2023-11-06 22:05:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:03,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:03,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:03,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098971089] [2023-11-06 22:05:03,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098971089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:03,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875948711] [2023-11-06 22:05:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:03,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:03,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:05:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:04,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:05:04,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:04,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-06 22:05:04,628 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:04,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-06 22:05:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:04,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:05,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-06 22:05:05,353 INFO L351 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 15 treesize of output 11 [2023-11-06 22:05:05,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-06 22:05:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:05,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875948711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:05,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:05,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-11-06 22:05:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274708528] [2023-11-06 22:05:05,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:05,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:05:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:05:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:05:05,403 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:07,078 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2023-11-06 22:05:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:05:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:05:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:07,081 INFO L225 Difference]: With dead ends: 78 [2023-11-06 22:05:07,081 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 22:05:07,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=255, Invalid=867, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:05:07,083 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 313 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:07,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 125 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:05:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 22:05:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2023-11-06 22:05:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.2) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-11-06 22:05:07,087 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 19 [2023-11-06 22:05:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:07,088 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-11-06 22:05:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-11-06 22:05:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:05:07,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:07,090 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] [2023-11-06 22:05:07,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:07,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:05:07,309 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:07,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 658274998, now seen corresponding path program 1 times [2023-11-06 22:05:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:07,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548185598] [2023-11-06 22:05:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:07,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:07,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548185598] [2023-11-06 22:05:07,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548185598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:07,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:07,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:05:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623912093] [2023-11-06 22:05:07,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:05:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:05:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:05:07,530 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:07,773 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2023-11-06 22:05:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:05:07,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 22:05:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:07,774 INFO L225 Difference]: With dead ends: 52 [2023-11-06 22:05:07,774 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 22:05:07,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:05:07,776 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:07,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 79 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 22:05:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-11-06 22:05:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-11-06 22:05:07,778 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2023-11-06 22:05:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:07,779 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-11-06 22:05:07,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-11-06 22:05:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:05:07,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:07,782 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, 1] [2023-11-06 22:05:07,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:05:07,782 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:07,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2067169221, now seen corresponding path program 1 times [2023-11-06 22:05:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059641167] [2023-11-06 22:05:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:08,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:08,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059641167] [2023-11-06 22:05:08,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059641167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:08,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336852157] [2023-11-06 22:05:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:08,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:08,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:08,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:05:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:08,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:05:08,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:08,372 INFO L351 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 10 treesize of output 8 [2023-11-06 22:05:08,405 INFO L351 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 14 treesize of output 10 [2023-11-06 22:05:08,464 INFO L351 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 19 treesize of output 14 [2023-11-06 22:05:09,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:09,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2023-11-06 22:05:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:09,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:10,465 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_141 (Array Int Int)) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_16| Int) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse0 (select v_ArrVal_141 |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_16|) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_141) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_16|) .cse0)) (< (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_16| 1) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_16| 0) (= .cse0 0)))) is different from false [2023-11-06 22:05:10,489 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:10,490 INFO L351 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 24 treesize of output 25 [2023-11-06 22:05:10,505 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:10,505 INFO L351 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 40 treesize of output 41 [2023-11-06 22:05:10,521 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:10,521 INFO L351 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 30 treesize of output 30 [2023-11-06 22:05:10,530 INFO L351 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 15 treesize of output 11 [2023-11-06 22:05:10,633 INFO L351 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 10 treesize of output 8 [2023-11-06 22:05:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:10,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336852157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:10,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:10,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 16] total 34 [2023-11-06 22:05:10,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680006673] [2023-11-06 22:05:10,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:10,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:05:10,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:10,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:05:10,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=958, Unknown=1, NotChecked=64, Total=1190 [2023-11-06 22:05:10,646 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 35 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:12,498 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2023-11-06 22:05:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:05:12,500 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-06 22:05:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:12,501 INFO L225 Difference]: With dead ends: 72 [2023-11-06 22:05:12,501 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 22:05:12,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=558, Invalid=1701, Unknown=1, NotChecked=92, Total=2352 [2023-11-06 22:05:12,503 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 301 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:12,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 111 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 259 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2023-11-06 22:05:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 22:05:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2023-11-06 22:05:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-11-06 22:05:12,517 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 22 [2023-11-06 22:05:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:12,518 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-11-06 22:05:12,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-11-06 22:05:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 22:05:12,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:12,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:12,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:05:12,746 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:12,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1423532355, now seen corresponding path program 2 times [2023-11-06 22:05:12,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:12,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473425999] [2023-11-06 22:05:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:13,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473425999] [2023-11-06 22:05:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473425999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136906860] [2023-11-06 22:05:13,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:13,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:13,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:13,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:13,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:05:13,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:13,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:13,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:05:13,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:13,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-06 22:05:14,541 INFO L322 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-11-06 22:05:14,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2023-11-06 22:05:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:14,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:15,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-06 22:05:15,586 INFO L351 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 15 treesize of output 11 [2023-11-06 22:05:15,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2023-11-06 22:05:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136906860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:15,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2023-11-06 22:05:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293776485] [2023-11-06 22:05:15,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:15,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:05:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:05:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:05:15,648 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:25,872 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2023-11-06 22:05:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:05:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 22:05:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:25,874 INFO L225 Difference]: With dead ends: 80 [2023-11-06 22:05:25,874 INFO L226 Difference]: Without dead ends: 80 [2023-11-06 22:05:25,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 22:05:25,877 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 357 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:25,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 157 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:05:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-06 22:05:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2023-11-06 22:05:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-06 22:05:25,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2023-11-06 22:05:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:25,881 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-06 22:05:25,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-06 22:05:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:05:25,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:25,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:25,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:26,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:05:26,097 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 22:05:26,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:26,097 INFO L85 PathProgramCache]: Analyzing trace with hash -587507249, now seen corresponding path program 2 times [2023-11-06 22:05:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:26,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829919707] [2023-11-06 22:05:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:26,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:27,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829919707] [2023-11-06 22:05:27,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829919707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171590714] [2023-11-06 22:05:27,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:27,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:27,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:27,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:27,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:05:27,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:27,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:27,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:05:27,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:27,755 INFO L351 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 10 treesize of output 8 [2023-11-06 22:05:27,806 INFO L351 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 14 treesize of output 10 [2023-11-06 22:05:27,884 INFO L351 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 19 treesize of output 14 [2023-11-06 22:05:30,720 INFO L322 Elim1Store]: treesize reduction 24, result has 79.8 percent of original size [2023-11-06 22:05:30,721 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 115 [2023-11-06 22:05:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:31,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:34,213 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:34,214 INFO L351 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 125 treesize of output 70 [2023-11-06 22:05:34,316 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:34,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 202 treesize of output 264 [2023-11-06 22:05:34,422 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:34,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 151 [2023-11-06 22:05:34,454 INFO L351 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 15 treesize of output 11 [2023-11-06 22:05:43,209 INFO L351 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 10 treesize of output 8 [2023-11-06 22:05:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:43,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171590714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:43,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:43,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 61 [2023-11-06 22:05:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550485237] [2023-11-06 22:05:43,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:43,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-06 22:05:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-06 22:05:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=3420, Unknown=13, NotChecked=0, Total=3782 [2023-11-06 22:05:43,253 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 62 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:53,565 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-11-06 22:05:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:05:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 62 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-06 22:05:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:53,566 INFO L225 Difference]: With dead ends: 59 [2023-11-06 22:05:53,567 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 22:05:53,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1917, Invalid=9411, Unknown=14, NotChecked=0, Total=11342 [2023-11-06 22:05:53,574 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 506 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 204 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:05:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 22:05:53,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 22:05:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 22:05:53,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2023-11-06 22:05:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:53,577 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 22:05:53,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 62 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 22:05:53,578 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 22:05:53,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-11-06 22:05:53,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-11-06 22:05:53,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-11-06 22:05:53,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-11-06 22:05:53,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-11-06 22:05:53,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-11-06 22:05:53,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-11-06 22:05:53,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-11-06 22:05:53,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-11-06 22:05:53,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-11-06 22:05:53,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-11-06 22:05:53,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-11-06 22:05:53,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-11-06 22:05:53,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-11-06 22:05:53,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2023-11-06 22:05:53,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:05:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:53,800 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:53,805 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:05:53,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:05:53 BoogieIcfgContainer [2023-11-06 22:05:53,809 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:05:53,810 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:05:53,810 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:05:53,811 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:05:53,811 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:58" (3/4) ... [2023-11-06 22:05:53,815 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:05:53,834 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-06 22:05:53,834 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-06 22:05:53,835 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-06 22:05:53,835 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 22:05:53,921 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:05:53,921 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:05:53,921 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:05:53,924 INFO L158 Benchmark]: Toolchain (without parser) took 57119.64ms. Allocated memory was 163.6MB in the beginning and 388.0MB in the end (delta: 224.4MB). Free memory was 115.8MB in the beginning and 323.6MB in the end (delta: -207.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2023-11-06 22:05:53,924 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 163.6MB. Free memory is still 136.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:05:53,925 INFO L158 Benchmark]: CACSL2BoogieTranslator took 613.43ms. Allocated memory is still 163.6MB. Free memory was 115.8MB in the beginning and 99.7MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-06 22:05:53,925 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.89ms. Allocated memory is still 163.6MB. Free memory was 99.7MB in the beginning and 97.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:05:53,926 INFO L158 Benchmark]: Boogie Preprocessor took 85.93ms. Allocated memory is still 163.6MB. Free memory was 97.6MB in the beginning and 96.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:05:53,926 INFO L158 Benchmark]: RCFGBuilder took 666.57ms. Allocated memory is still 163.6MB. Free memory was 96.2MB in the beginning and 81.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 22:05:53,927 INFO L158 Benchmark]: TraceAbstraction took 55568.49ms. Allocated memory was 163.6MB in the beginning and 388.0MB in the end (delta: 224.4MB). Free memory was 80.8MB in the beginning and 326.8MB in the end (delta: -246.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:05:53,927 INFO L158 Benchmark]: Witness Printer took 111.57ms. Allocated memory is still 388.0MB. Free memory was 326.8MB in the beginning and 323.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 22:05:53,931 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 163.6MB. Free memory is still 136.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 613.43ms. Allocated memory is still 163.6MB. Free memory was 115.8MB in the beginning and 99.7MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.89ms. Allocated memory is still 163.6MB. Free memory was 99.7MB in the beginning and 97.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 85.93ms. Allocated memory is still 163.6MB. Free memory was 97.6MB in the beginning and 96.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 666.57ms. Allocated memory is still 163.6MB. Free memory was 96.2MB in the beginning and 81.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 55568.49ms. Allocated memory was 163.6MB in the beginning and 388.0MB in the end (delta: 224.4MB). Free memory was 80.8MB in the beginning and 326.8MB in the end (delta: -246.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 111.57ms. Allocated memory is still 388.0MB. Free memory was 326.8MB in the beginning and 323.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 562]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 55.5s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 25.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2345 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2345 mSDsluCounter, 1502 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 51 IncrementalHoareTripleChecker+Unchecked, 1087 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2452 IncrementalHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 415 mSDtfsCounter, 2452 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 430 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 310 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 30.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=14, InterpolantAutomatonStates: 188, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 185 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 27.1s InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 447 ConstructedInterpolants, 90 QuantifiedInterpolants, 7127 SizeOfPredicates, 82 NumberOfNonLiveVariables, 555 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 27 InterpolantComputations, 15 PerfectInterpolantSequences, 16/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 22:05:54,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4523aaf3-ec9d-4dbe-8202-8eacca09b84f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE