./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strlcat.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strlcat.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4a2b4697f5c3b66d485090307ef74ec11d08954b2ae38adb1c0f438a86221c12 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:54,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:54,671 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-26 11:47:54,676 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:54,677 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:54,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:54,705 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:54,706 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:54,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:54,707 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:54,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:54,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:54,709 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:54,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:54,711 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:54,711 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:54,712 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:54,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:54,713 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:47:54,714 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:47:54,715 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:47:54,715 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:54,716 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:47:54,717 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:47:54,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:54,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:54,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:54,719 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:54,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:54,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:54,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:54,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:54,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:54,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:54,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:54,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:54,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:54,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:54,725 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_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a2b4697f5c3b66d485090307ef74ec11d08954b2ae38adb1c0f438a86221c12 [2023-11-26 11:47:55,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:55,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:55,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:55,060 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:55,061 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:55,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/termination-dietlibc/strlcat.i [2023-11-26 11:47:58,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:58,566 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:58,567 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/sv-benchmarks/c/termination-dietlibc/strlcat.i [2023-11-26 11:47:58,582 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/data/3354813e1/46c098849e76498e97511243e9ca3267/FLAGb47fa6808 [2023-11-26 11:47:58,598 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/data/3354813e1/46c098849e76498e97511243e9ca3267 [2023-11-26 11:47:58,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:58,604 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:58,606 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:58,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:58,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:58,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:58" (1/1) ... [2023-11-26 11:47:58,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1611e04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:58, skipping insertion in model container [2023-11-26 11:47:58,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:58" (1/1) ... [2023-11-26 11:47:58,662 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:58,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:59,005 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:59,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:59,121 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:59,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59 WrapperNode [2023-11-26 11:47:59,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:59,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:59,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:59,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:59,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,199 INFO L138 Inliner]: procedures = 114, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 115 [2023-11-26 11:47:59,200 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:59,201 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:59,201 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:59,201 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:59,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,231 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,260 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [4, 4]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [1, 3]. [2023-11-26 11:47:59,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,280 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,296 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,305 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:59,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:59,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:59,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:59,308 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (1/1) ... [2023-11-26 11:47:59,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:59,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:59,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:47:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:47:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:47:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:47:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:47:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:47:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:59,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:59,519 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:59,523 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:59,906 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:59,967 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:59,968 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:47:59,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:59 BoogieIcfgContainer [2023-11-26 11:47:59,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:59,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:59,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:59,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:59,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:58" (1/3) ... [2023-11-26 11:47:59,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aad9f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:59, skipping insertion in model container [2023-11-26 11:47:59,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:59" (2/3) ... [2023-11-26 11:47:59,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aad9f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:59, skipping insertion in model container [2023-11-26 11:47:59,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:59" (3/3) ... [2023-11-26 11:47:59,985 INFO L112 eAbstractionObserver]: Analyzing ICFG strlcat.i [2023-11-26 11:48:00,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:48:00,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-11-26 11:48:00,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:00,064 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;@6320073d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:00,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-26 11:48:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-26 11:48:00,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:00,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-26 11:48:00,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:00,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash 141531, now seen corresponding path program 1 times [2023-11-26 11:48:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:00,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382143684] [2023-11-26 11:48:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:00,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:00,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382143684] [2023-11-26 11:48:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382143684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:00,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:00,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:48:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323955002] [2023-11-26 11:48:00,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:00,282 INFO L87 Difference]: Start difference. First operand has 42 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:00,348 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2023-11-26 11:48:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:00,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-26 11:48:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:00,359 INFO L225 Difference]: With dead ends: 43 [2023-11-26 11:48:00,359 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 11:48:00,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:00,365 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:00,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 11:48:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-26 11:48:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 2.0) 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) [2023-11-26 11:48:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-11-26 11:48:00,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 3 [2023-11-26 11:48:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:00,401 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-11-26 11:48:00,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-11-26 11:48:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-26 11:48:00,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:00,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-26 11:48:00,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:48:00,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:00,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 141493, now seen corresponding path program 1 times [2023-11-26 11:48:00,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:00,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544817540] [2023-11-26 11:48:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:00,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:00,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:00,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544817540] [2023-11-26 11:48:00,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544817540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:00,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:00,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:00,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079257221] [2023-11-26 11:48:00,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:00,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:00,533 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:00,576 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-11-26 11:48:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-26 11:48:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:00,578 INFO L225 Difference]: With dead ends: 40 [2023-11-26 11:48:00,578 INFO L226 Difference]: Without dead ends: 40 [2023-11-26 11:48:00,578 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 [2023-11-26 11:48:00,580 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:00,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 26 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-26 11:48:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-26 11:48:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 39 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) [2023-11-26 11:48:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-11-26 11:48:00,597 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 3 [2023-11-26 11:48:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:00,597 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-11-26 11:48:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-11-26 11:48:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-26 11:48:00,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:00,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-26 11:48:00,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:48:00,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:00,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash 141494, now seen corresponding path program 1 times [2023-11-26 11:48:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:00,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122924141] [2023-11-26 11:48:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:00,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:00,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:00,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122924141] [2023-11-26 11:48:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122924141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:00,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:00,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:00,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125506937] [2023-11-26 11:48:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:00,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:00,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:00,852 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:00,928 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-26 11:48:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:00,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-26 11:48:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:00,929 INFO L225 Difference]: With dead ends: 41 [2023-11-26 11:48:00,930 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 11:48:00,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:00,931 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:00,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 63 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 11:48:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-26 11:48:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 38 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) [2023-11-26 11:48:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-11-26 11:48:00,938 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 3 [2023-11-26 11:48:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:00,939 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-11-26 11:48:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-11-26 11:48:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:48:00,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:00,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:48:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:48:00,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:00,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 136075231, now seen corresponding path program 1 times [2023-11-26 11:48:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:00,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482464677] [2023-11-26 11:48:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:01,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:01,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482464677] [2023-11-26 11:48:01,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482464677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:01,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:01,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:01,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185504498] [2023-11-26 11:48:01,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:01,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:01,027 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:01,076 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-11-26 11:48:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:01,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-26 11:48:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:01,077 INFO L225 Difference]: With dead ends: 38 [2023-11-26 11:48:01,077 INFO L226 Difference]: Without dead ends: 38 [2023-11-26 11:48:01,078 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 [2023-11-26 11:48:01,079 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:01,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 27 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-26 11:48:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-26 11:48:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.875) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-26 11:48:01,085 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 5 [2023-11-26 11:48:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:01,086 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-26 11:48:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-26 11:48:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:48:01,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:01,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:48:01,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:48:01,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:01,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 136075232, now seen corresponding path program 1 times [2023-11-26 11:48:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:01,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437152422] [2023-11-26 11:48:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:01,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:01,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437152422] [2023-11-26 11:48:01,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437152422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:01,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:01,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:01,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659561843] [2023-11-26 11:48:01,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:01,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:01,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:01,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:01,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:01,349 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:01,407 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-26 11:48:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:01,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-26 11:48:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:01,410 INFO L225 Difference]: With dead ends: 39 [2023-11-26 11:48:01,410 INFO L226 Difference]: Without dead ends: 39 [2023-11-26 11:48:01,410 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 [2023-11-26 11:48:01,414 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:01,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 29 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-26 11:48:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-11-26 11:48:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 36 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) [2023-11-26 11:48:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-11-26 11:48:01,433 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 5 [2023-11-26 11:48:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:01,433 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-11-26 11:48:01,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-11-26 11:48:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:48:01,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:01,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:48:01,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:48:01,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:01,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash 136075260, now seen corresponding path program 1 times [2023-11-26 11:48:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:01,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475910550] [2023-11-26 11:48:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:01,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:01,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475910550] [2023-11-26 11:48:01,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475910550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:01,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:01,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114009816] [2023-11-26 11:48:01,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:01,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:01,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:01,556 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:01,614 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-11-26 11:48:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-26 11:48:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:01,617 INFO L225 Difference]: With dead ends: 38 [2023-11-26 11:48:01,618 INFO L226 Difference]: Without dead ends: 37 [2023-11-26 11:48:01,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:01,624 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:01,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-26 11:48:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-26 11:48:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-11-26 11:48:01,635 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 5 [2023-11-26 11:48:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:01,635 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-11-26 11:48:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-11-26 11:48:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:48:01,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:01,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:48:01,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:48:01,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:01,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash -76632040, now seen corresponding path program 1 times [2023-11-26 11:48:01,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582102607] [2023-11-26 11:48:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:01,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:01,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:01,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582102607] [2023-11-26 11:48:01,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582102607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:01,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:01,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:01,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802362565] [2023-11-26 11:48:01,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:01,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:01,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:01,811 INFO L87 Difference]: Start difference. First operand 37 states and 43 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) [2023-11-26 11:48:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:01,873 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-11-26 11:48:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:01,886 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 [2023-11-26 11:48:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:01,888 INFO L225 Difference]: With dead ends: 35 [2023-11-26 11:48:01,888 INFO L226 Difference]: Without dead ends: 35 [2023-11-26 11:48:01,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:01,892 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:01,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-26 11:48:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-26 11:48:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 34 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) [2023-11-26 11:48:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-26 11:48:01,908 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2023-11-26 11:48:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:01,909 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-26 11:48:01,909 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) [2023-11-26 11:48:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-26 11:48:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:48:01,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:01,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:48:01,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:48:01,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:01,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash -76632039, now seen corresponding path program 1 times [2023-11-26 11:48:01,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:01,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893285821] [2023-11-26 11:48:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:02,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893285821] [2023-11-26 11:48:02,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893285821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:02,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:02,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:48:02,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399029327] [2023-11-26 11:48:02,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:02,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:02,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:02,245 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2023-11-26 11:48:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:02,422 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-11-26 11:48:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:02,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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 [2023-11-26 11:48:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:02,424 INFO L225 Difference]: With dead ends: 55 [2023-11-26 11:48:02,424 INFO L226 Difference]: Without dead ends: 55 [2023-11-26 11:48:02,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:02,426 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 150 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:02,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 31 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-26 11:48:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2023-11-26 11:48:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-11-26 11:48:02,436 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 6 [2023-11-26 11:48:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:02,436 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-11-26 11:48:02,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2023-11-26 11:48:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-11-26 11:48:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 11:48:02,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:02,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:02,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:48:02,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:02,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1980301344, now seen corresponding path program 1 times [2023-11-26 11:48:02,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:02,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996038680] [2023-11-26 11:48:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:02,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996038680] [2023-11-26 11:48:02,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996038680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505685360] [2023-11-26 11:48:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:02,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:02,481 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-11-26 11:48:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:02,504 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-11-26 11:48:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:02,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2023-11-26 11:48:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:02,509 INFO L225 Difference]: With dead ends: 47 [2023-11-26 11:48:02,509 INFO L226 Difference]: Without dead ends: 47 [2023-11-26 11:48:02,510 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 [2023-11-26 11:48:02,512 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 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 [2023-11-26 11:48:02,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-26 11:48:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-26 11:48:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 46 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) [2023-11-26 11:48:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2023-11-26 11:48:02,523 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 9 [2023-11-26 11:48:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:02,523 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2023-11-26 11:48:02,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-11-26 11:48:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2023-11-26 11:48:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 11:48:02,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:02,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:02,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:48:02,525 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:02,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:02,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1980299422, now seen corresponding path program 1 times [2023-11-26 11:48:02,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:02,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381259814] [2023-11-26 11:48:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:02,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:02,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:02,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381259814] [2023-11-26 11:48:02,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381259814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:02,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259655280] [2023-11-26 11:48:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:02,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:02,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:02,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:02,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:48:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:03,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 11:48:03,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:03,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 11:48:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:03,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 11:48:03,245 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:48:03,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 11:48:03,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:48:03,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2023-11-26 11:48:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:03,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:48:03,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-26 11:48:03,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-26 11:48:03,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-26 11:48:04,019 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:48:04,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-26 11:48:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:04,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259655280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:04,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:04,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-26 11:48:04,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166304611] [2023-11-26 11:48:04,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:04,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:48:04,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:48:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:48:04,038 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:05,353 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2023-11-26 11:48:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:48:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2023-11-26 11:48:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:05,356 INFO L225 Difference]: With dead ends: 127 [2023-11-26 11:48:05,356 INFO L226 Difference]: Without dead ends: 127 [2023-11-26 11:48:05,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 11:48:05,358 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 622 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:05,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 161 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:48:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-26 11:48:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 53. [2023-11-26 11:48:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 52 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2023-11-26 11:48:05,363 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 9 [2023-11-26 11:48:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:05,364 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2023-11-26 11:48:05,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,364 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2023-11-26 11:48:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:48:05,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:05,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:05,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:05,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:48:05,572 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:05,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 399037560, now seen corresponding path program 1 times [2023-11-26 11:48:05,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:05,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784146331] [2023-11-26 11:48:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:05,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:05,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784146331] [2023-11-26 11:48:05,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784146331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:05,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:05,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609846146] [2023-11-26 11:48:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:05,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:05,665 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:05,697 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-11-26 11:48:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:05,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-26 11:48:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:05,699 INFO L225 Difference]: With dead ends: 51 [2023-11-26 11:48:05,699 INFO L226 Difference]: Without dead ends: 51 [2023-11-26 11:48:05,700 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 [2023-11-26 11:48:05,701 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:05,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-26 11:48:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-26 11:48:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-11-26 11:48:05,706 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 11 [2023-11-26 11:48:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:05,706 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-11-26 11:48:05,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-11-26 11:48:05,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:48:05,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:05,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:05,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:48:05,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:05,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash 399037561, now seen corresponding path program 1 times [2023-11-26 11:48:05,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:05,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201582033] [2023-11-26 11:48:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:05,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:05,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:05,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201582033] [2023-11-26 11:48:05,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201582033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:05,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:05,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467123965] [2023-11-26 11:48:05,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:05,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:05,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:05,897 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:05,954 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2023-11-26 11:48:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-26 11:48:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:05,956 INFO L225 Difference]: With dead ends: 68 [2023-11-26 11:48:05,956 INFO L226 Difference]: Without dead ends: 68 [2023-11-26 11:48:05,956 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 [2023-11-26 11:48:05,958 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:05,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-26 11:48:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-11-26 11:48:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.62) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2023-11-26 11:48:05,965 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 11 [2023-11-26 11:48:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:05,965 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2023-11-26 11:48:05,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2023-11-26 11:48:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:48:05,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:05,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:05,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:48:05,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:05,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash -514763295, now seen corresponding path program 1 times [2023-11-26 11:48:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:05,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325850202] [2023-11-26 11:48:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:06,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:06,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325850202] [2023-11-26 11:48:06,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325850202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:06,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:06,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599263225] [2023-11-26 11:48:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:06,056 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:06,110 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2023-11-26 11:48:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 11:48:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:06,112 INFO L225 Difference]: With dead ends: 58 [2023-11-26 11:48:06,112 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 11:48:06,112 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 [2023-11-26 11:48:06,113 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:06,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 11:48:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-26 11:48:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.6) internal successors, (80), 57 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2023-11-26 11:48:06,119 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 12 [2023-11-26 11:48:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:06,120 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2023-11-26 11:48:06,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2023-11-26 11:48:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:48:06,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:06,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:48:06,122 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:06,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash -514763294, now seen corresponding path program 1 times [2023-11-26 11:48:06,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:06,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779144762] [2023-11-26 11:48:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:06,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:06,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779144762] [2023-11-26 11:48:06,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779144762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:06,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:06,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:06,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143343049] [2023-11-26 11:48:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:06,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:06,357 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:06,441 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-11-26 11:48:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:48:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 11:48:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:06,443 INFO L225 Difference]: With dead ends: 71 [2023-11-26 11:48:06,443 INFO L226 Difference]: Without dead ends: 71 [2023-11-26 11:48:06,444 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 [2023-11-26 11:48:06,444 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:06,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 43 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-26 11:48:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2023-11-26 11:48:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.588235294117647) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2023-11-26 11:48:06,448 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 12 [2023-11-26 11:48:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:06,449 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2023-11-26 11:48:06,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2023-11-26 11:48:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:48:06,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:06,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:48:06,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:06,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:06,452 INFO L85 PathProgramCache]: Analyzing trace with hash -567925255, now seen corresponding path program 2 times [2023-11-26 11:48:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:06,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495496537] [2023-11-26 11:48:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:06,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:07,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:07,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495496537] [2023-11-26 11:48:07,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495496537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612600933] [2023-11-26 11:48:07,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:07,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:07,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:07,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:07,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:07,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:48:07,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:07,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 11:48:07,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:07,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 11:48:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:07,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 11:48:07,316 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:48:07,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 11:48:07,787 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-11-26 11:48:07,787 INFO L378 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 42 treesize of output 39 [2023-11-26 11:48:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:07,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:08,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-26 11:48:08,519 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:48:08,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-26 11:48:08,535 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:48:08,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-26 11:48:08,558 INFO L378 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 [2023-11-26 11:48:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:08,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612600933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:08,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:08,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2023-11-26 11:48:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988285133] [2023-11-26 11:48:08,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:08,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 11:48:08,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 11:48:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2023-11-26 11:48:08,588 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:12,242 INFO L93 Difference]: Finished difference Result 188 states and 240 transitions. [2023-11-26 11:48:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:48:12,243 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 11:48:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:12,245 INFO L225 Difference]: With dead ends: 188 [2023-11-26 11:48:12,245 INFO L226 Difference]: Without dead ends: 188 [2023-11-26 11:48:12,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=508, Invalid=1654, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 11:48:12,246 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 650 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:12,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 528 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:48:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-26 11:48:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 54. [2023-11-26 11:48:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.574468085106383) internal successors, (74), 53 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2023-11-26 11:48:12,250 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 12 [2023-11-26 11:48:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:12,250 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2023-11-26 11:48:12,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2023-11-26 11:48:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 11:48:12,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:12,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:12,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:12,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:12,457 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:12,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash -766330157, now seen corresponding path program 1 times [2023-11-26 11:48:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:12,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229569945] [2023-11-26 11:48:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:12,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:12,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:12,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229569945] [2023-11-26 11:48:12,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229569945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:12,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:12,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:48:12,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423490036] [2023-11-26 11:48:12,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:12,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:12,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:12,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:12,557 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:12,603 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2023-11-26 11:48:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:48:12,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 11:48:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:12,604 INFO L225 Difference]: With dead ends: 54 [2023-11-26 11:48:12,605 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 11:48:12,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:12,606 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:12,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 41 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 11:48:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-26 11:48:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.553191489361702) internal successors, (73), 53 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2023-11-26 11:48:12,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 14 [2023-11-26 11:48:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:12,610 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2023-11-26 11:48:12,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2023-11-26 11:48:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 11:48:12,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:12,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:48:12,615 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:12,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash -766284825, now seen corresponding path program 1 times [2023-11-26 11:48:12,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:12,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679493501] [2023-11-26 11:48:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:12,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:12,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679493501] [2023-11-26 11:48:12,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679493501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:12,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:12,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:48:12,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052722550] [2023-11-26 11:48:12,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:12,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:12,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:12,816 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:12,934 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2023-11-26 11:48:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 11:48:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:12,936 INFO L225 Difference]: With dead ends: 88 [2023-11-26 11:48:12,936 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 11:48:12,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:48:12,937 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:12,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 65 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 11:48:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2023-11-26 11:48:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.509090909090909) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2023-11-26 11:48:12,940 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 14 [2023-11-26 11:48:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:12,941 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2023-11-26 11:48:12,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2023-11-26 11:48:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:48:12,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:12,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:12,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:48:12,943 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:12,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:12,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1510816646, now seen corresponding path program 1 times [2023-11-26 11:48:12,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:12,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143255595] [2023-11-26 11:48:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:13,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:13,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143255595] [2023-11-26 11:48:13,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143255595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:13,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:13,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:13,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518741046] [2023-11-26 11:48:13,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:13,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:13,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:13,113 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:13,158 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2023-11-26 11:48:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:48:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 11:48:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:13,160 INFO L225 Difference]: With dead ends: 61 [2023-11-26 11:48:13,160 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 11:48:13,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:13,161 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:13,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 63 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 11:48:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-26 11:48:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.44) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-11-26 11:48:13,164 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 15 [2023-11-26 11:48:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:13,165 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-11-26 11:48:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-11-26 11:48:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:48:13,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:13,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:13,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:48:13,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:13,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:13,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1510775632, now seen corresponding path program 1 times [2023-11-26 11:48:13,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:13,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600432304] [2023-11-26 11:48:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:13,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:13,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600432304] [2023-11-26 11:48:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600432304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842819830] [2023-11-26 11:48:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:13,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:13,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:13,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:13,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:48:13,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:13,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 11:48:13,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:48:13,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-26 11:48:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:13,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:13,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-26 11:48:13,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-26 11:48:13,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:13,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842819830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:13,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:13,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-26 11:48:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110699128] [2023-11-26 11:48:13,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:13,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:48:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:48:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:48:14,000 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:14,296 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2023-11-26 11:48:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 11:48:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:14,298 INFO L225 Difference]: With dead ends: 82 [2023-11-26 11:48:14,298 INFO L226 Difference]: Without dead ends: 82 [2023-11-26 11:48:14,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:48:14,299 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 124 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:14,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 83 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-26 11:48:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2023-11-26 11:48:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 62 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2023-11-26 11:48:14,302 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 15 [2023-11-26 11:48:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:14,302 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2023-11-26 11:48:14,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2023-11-26 11:48:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:48:14,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:14,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:14,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:14,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:14,511 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:14,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1510784578, now seen corresponding path program 1 times [2023-11-26 11:48:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:14,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019205887] [2023-11-26 11:48:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:14,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019205887] [2023-11-26 11:48:14,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019205887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:14,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:14,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704020919] [2023-11-26 11:48:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:14,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:14,564 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:14,604 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-11-26 11:48:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 11:48:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:14,606 INFO L225 Difference]: With dead ends: 62 [2023-11-26 11:48:14,606 INFO L226 Difference]: Without dead ends: 62 [2023-11-26 11:48:14,606 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 [2023-11-26 11:48:14,607 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:14,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-26 11:48:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-26 11:48:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2023-11-26 11:48:14,619 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 15 [2023-11-26 11:48:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:14,619 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2023-11-26 11:48:14,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2023-11-26 11:48:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:48:14,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:14,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:14,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 11:48:14,621 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:14,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1510784577, now seen corresponding path program 1 times [2023-11-26 11:48:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13123015] [2023-11-26 11:48:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13123015] [2023-11-26 11:48:14,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13123015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:14,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:48:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866297119] [2023-11-26 11:48:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:14,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:14,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:14,747 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:14,836 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2023-11-26 11:48:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 11:48:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:14,837 INFO L225 Difference]: With dead ends: 89 [2023-11-26 11:48:14,837 INFO L226 Difference]: Without dead ends: 89 [2023-11-26 11:48:14,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:48:14,841 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:14,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-26 11:48:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-11-26 11:48:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 87 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2023-11-26 11:48:14,845 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 15 [2023-11-26 11:48:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:14,845 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2023-11-26 11:48:14,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2023-11-26 11:48:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:48:14,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:14,846 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:14,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:48:14,847 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:14,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1504927596, now seen corresponding path program 1 times [2023-11-26 11:48:14,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338200861] [2023-11-26 11:48:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:48:15,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:15,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338200861] [2023-11-26 11:48:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338200861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:15,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817098896] [2023-11-26 11:48:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:15,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:15,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:15,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:48:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 11:48:15,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:15,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 11:48:15,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:48:15,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-26 11:48:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:48:15,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:15,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-26 11:48:15,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-26 11:48:15,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:48:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817098896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:15,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:15,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-26 11:48:15,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852090648] [2023-11-26 11:48:15,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:15,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:48:15,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:48:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:48:15,913 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 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) [2023-11-26 11:48:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:16,311 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2023-11-26 11:48:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 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) Word has length 17 [2023-11-26 11:48:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:16,312 INFO L225 Difference]: With dead ends: 92 [2023-11-26 11:48:16,312 INFO L226 Difference]: Without dead ends: 92 [2023-11-26 11:48:16,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:48:16,313 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:16,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 80 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-26 11:48:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2023-11-26 11:48:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.302325581395349) internal successors, (112), 89 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2023-11-26 11:48:16,317 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 17 [2023-11-26 11:48:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:16,317 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2023-11-26 11:48:16,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 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) [2023-11-26 11:48:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2023-11-26 11:48:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 11:48:16,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:16,318 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:16,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:16,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:16,519 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:16,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash 177323738, now seen corresponding path program 1 times [2023-11-26 11:48:16,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:16,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685103449] [2023-11-26 11:48:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:16,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:16,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:16,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685103449] [2023-11-26 11:48:16,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685103449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:16,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835213381] [2023-11-26 11:48:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:16,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:16,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:16,657 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:16,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:48:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:16,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:48:16,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:16,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:16,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835213381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:16,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:16,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-26 11:48:16,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234119654] [2023-11-26 11:48:16,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:16,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:16,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:16,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:16,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:16,819 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:16,894 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2023-11-26 11:48:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:16,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-26 11:48:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:16,895 INFO L225 Difference]: With dead ends: 100 [2023-11-26 11:48:16,895 INFO L226 Difference]: Without dead ends: 100 [2023-11-26 11:48:16,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:48:16,897 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:16,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-26 11:48:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2023-11-26 11:48:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2023-11-26 11:48:16,901 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 18 [2023-11-26 11:48:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:16,902 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2023-11-26 11:48:16,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2023-11-26 11:48:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:48:16,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:16,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:16,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:17,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:17,111 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:17,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash -10682009, now seen corresponding path program 2 times [2023-11-26 11:48:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:17,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680968420] [2023-11-26 11:48:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:17,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680968420] [2023-11-26 11:48:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680968420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501839303] [2023-11-26 11:48:17,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:17,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:17,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:17,575 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:17,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:48:17,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:48:17,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:17,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-26 11:48:17,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:17,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:48:17,709 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:48:17,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 11:48:17,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-26 11:48:18,078 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-11-26 11:48:18,078 INFO L378 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 25 treesize of output 23 [2023-11-26 11:48:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:18,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:18,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-26 11:48:18,629 INFO L378 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 29 treesize of output 23 [2023-11-26 11:48:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501839303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:18,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:18,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-11-26 11:48:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278041983] [2023-11-26 11:48:18,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:18,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 11:48:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 11:48:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:48:18,704 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:20,904 INFO L93 Difference]: Finished difference Result 223 states and 262 transitions. [2023-11-26 11:48:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 11:48:20,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2023-11-26 11:48:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:20,906 INFO L225 Difference]: With dead ends: 223 [2023-11-26 11:48:20,906 INFO L226 Difference]: Without dead ends: 223 [2023-11-26 11:48:20,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=567, Invalid=2085, Unknown=0, NotChecked=0, Total=2652 [2023-11-26 11:48:20,909 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 609 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:20,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 100 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:48:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-26 11:48:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 146. [2023-11-26 11:48:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 145 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2023-11-26 11:48:20,915 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 19 [2023-11-26 11:48:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:20,916 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2023-11-26 11:48:20,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2023-11-26 11:48:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:48:20,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:20,917 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:20,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:21,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:21,124 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-26 11:48:21,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 343690649, now seen corresponding path program 1 times [2023-11-26 11:48:21,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:21,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373799084] [2023-11-26 11:48:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:21,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:48:21,152 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:48:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:48:21,197 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:48:21,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:48:21,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2023-11-26 11:48:21,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2023-11-26 11:48:21,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2023-11-26 11:48:21,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2023-11-26 11:48:21,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2023-11-26 11:48:21,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2023-11-26 11:48:21,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2023-11-26 11:48:21,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2023-11-26 11:48:21,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2023-11-26 11:48:21,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2023-11-26 11:48:21,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2023-11-26 11:48:21,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2023-11-26 11:48:21,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2023-11-26 11:48:21,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2023-11-26 11:48:21,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2023-11-26 11:48:21,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2023-11-26 11:48:21,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2023-11-26 11:48:21,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-26 11:48:21,211 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:21,216 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:48:21,262 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc16 [2023-11-26 11:48:21,264 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc18 [2023-11-26 11:48:21,264 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc16 [2023-11-26 11:48:21,268 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:48:21,268 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short7 could not be translated [2023-11-26 11:48:21,270 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~post11 [2023-11-26 11:48:21,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:48:21 BoogieIcfgContainer [2023-11-26 11:48:21,282 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:48:21,282 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:48:21,283 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:48:21,283 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:48:21,283 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:59" (3/4) ... [2023-11-26 11:48:21,284 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 11:48:21,302 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc16 [2023-11-26 11:48:21,302 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc16 [2023-11-26 11:48:21,303 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc18 [2023-11-26 11:48:21,311 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:48:21,313 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short7 could not be translated [2023-11-26 11:48:21,314 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~post11 [2023-11-26 11:48:21,364 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:48:21,364 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:48:21,366 INFO L158 Benchmark]: Toolchain (without parser) took 22760.84ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 99.8MB in the beginning and 92.0MB in the end (delta: 7.8MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. [2023-11-26 11:48:21,366 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 63.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:48:21,368 INFO L158 Benchmark]: CACSL2BoogieTranslator took 516.88ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 82.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-26 11:48:21,368 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.48ms. Allocated memory is still 142.6MB. Free memory was 82.7MB in the beginning and 80.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:48:21,368 INFO L158 Benchmark]: Boogie Preprocessor took 104.78ms. Allocated memory is still 142.6MB. Free memory was 80.6MB in the beginning and 78.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:48:21,369 INFO L158 Benchmark]: RCFGBuilder took 662.17ms. Allocated memory is still 142.6MB. Free memory was 78.2MB in the beginning and 102.5MB in the end (delta: -24.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:48:21,370 INFO L158 Benchmark]: TraceAbstraction took 21304.42ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 102.0MB in the beginning and 95.2MB in the end (delta: 6.8MB). Peak memory consumption was 90.7MB. Max. memory is 16.1GB. [2023-11-26 11:48:21,370 INFO L158 Benchmark]: Witness Printer took 82.10ms. Allocated memory is still 224.4MB. Free memory was 95.2MB in the beginning and 92.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:48:21,383 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 113.2MB. Free memory is still 63.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 516.88ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 82.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.48ms. Allocated memory is still 142.6MB. Free memory was 82.7MB in the beginning and 80.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 104.78ms. Allocated memory is still 142.6MB. Free memory was 80.6MB in the beginning and 78.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 662.17ms. Allocated memory is still 142.6MB. Free memory was 78.2MB in the beginning and 102.5MB in the end (delta: -24.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 21304.42ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 102.0MB in the beginning and 95.2MB in the end (delta: 6.8MB). Peak memory consumption was 90.7MB. Max. memory is 16.1GB. * Witness Printer took 82.10ms. Allocated memory is still 224.4MB. Free memory was 95.2MB in the beginning and 92.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc16 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc18 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc16 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~post11 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc16 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc16 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc18 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~post11 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L538] int in_len = __VERIFIER_nondet_int(); [L539] COND FALSE !(in_len < 1) [L540] char* in = __builtin_alloca (in_len); VAL [in={4:0}, in_len=1] [L541] in[in_len-1]=0 [L542] int out_len = __VERIFIER_nondet_int(); [L543] COND FALSE !(out_len < 1) [L544] char* out = __builtin_alloca (out_len); VAL [in={4:0}, in_len=1, out={3:0}, out_len=2] [L545] out[out_len-1]=0 [L546] CALL strlcat(in, out, out_len) [L517] register char *d = dst; [L518] register const char *s = src; [L519] register size_t n = siz; [L520] size_t dlen; VAL [\old(siz)=2, d={4:0}, dst={4:0}, dst={4:0}, n=2, s={3:0}, siz=2, src={3:0}, src={3:0}] [L521] EXPR \read(*d) [L521] *d != '\0' && n-- != 0 VAL [\old(siz)=2, d={4:0}, dst={4:0}, dst={4:0}, n=2, s={3:0}, siz=2, src={3:0}, src={3:0}] [L521] COND FALSE !(*d != '\0' && n-- != 0) [L523] dlen = d - dst [L524] n = siz - dlen VAL [\old(siz)=2, d={4:0}, dlen=0, dst={4:0}, dst={4:0}, n=2, s={3:0}, siz=2, src={3:0}, src={3:0}] [L525] COND FALSE !(n == 0) [L527] EXPR \read(*s) [L527] COND TRUE *s != '\0' [L528] COND TRUE n != 1 [L529] EXPR d++ VAL [\old(siz)=2, d={4:1}, dlen=0, dst={4:0}, dst={4:0}, n=2, s={3:0}, siz=2, src={3:0}, src={3:0}] [L529] EXPR \read(*s) [L529] *d++ = *s [L530] n-- VAL [\old(siz)=2, d={4:1}, dlen=0, dst={4:0}, dst={4:0}, n=1, s={3:0}, siz=2, src={3:0}, src={3:0}] [L532] s++ VAL [\old(siz)=2, d={4:1}, dlen=0, dst={4:0}, dst={4:0}, n=1, s={3:1}, siz=2, src={3:0}, src={3:0}] [L527] EXPR \read(*s) [L527] COND FALSE !(*s != '\0') [L534] *d = '\0' - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 21.2s, OverallIterations: 25, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2982 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2982 mSDsluCounter, 1795 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1173 mSDsCounter, 104 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2568 IncrementalHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 104 mSolverCounterUnsat, 622 mSDtfsCounter, 2568 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 343 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=24, InterpolantAutomatonStates: 166, 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, 24 MinimizatonAttempts, 396 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 363 NumberOfCodeBlocks, 363 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 381 ConstructedInterpolants, 47 QuantifiedInterpolants, 4285 SizeOfPredicates, 82 NumberOfNonLiveVariables, 778 ConjunctsInSsa, 201 ConjunctsInUnsatCore, 35 InterpolantComputations, 19 PerfectInterpolantSequences, 15/59 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 RESULT: Ultimate proved your program to be incorrect! [2023-11-26 11:48:21,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057b9397-f533-4c17-b7bb-e7a16024715a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)