./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:52:33,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:52:33,438 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:52:33,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:52:33,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:52:33,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:52:33,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:52:33,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:52:33,488 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:52:33,488 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:52:33,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:52:33,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:52:33,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:52:33,491 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:52:33,492 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:52:33,492 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:52:33,494 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:52:33,495 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:52:33,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:52:33,496 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:52:33,496 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:52:33,500 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:52:33,501 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:52:33,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:52:33,501 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:52:33,502 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:52:33,502 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:52:33,502 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:52:33,503 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:52:33,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:52:33,504 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:52:33,505 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:52:33,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:52:33,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:52:33,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:52:33,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:52:33,507 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:52:33,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:52:33,508 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:52:33,508 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:52:33,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:52:33,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:52:33,509 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_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2024-11-08 16:52:33,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:52:33,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:52:33,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:52:33,921 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:52:33,921 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:52:33,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i Unable to find full path for "g++" [2024-11-08 16:52:36,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:52:36,725 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:52:36,729 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2024-11-08 16:52:36,756 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/data/43e3e8974/0f3081299fc14c91a96593aa4f806f21/FLAG12c422af8 [2024-11-08 16:52:36,947 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/data/43e3e8974/0f3081299fc14c91a96593aa4f806f21 [2024-11-08 16:52:36,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:52:36,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:52:36,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:52:36,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:52:36,964 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:52:36,965 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:52:36" (1/1) ... [2024-11-08 16:52:36,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7794eb74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:36, skipping insertion in model container [2024-11-08 16:52:36,969 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:52:36" (1/1) ... [2024-11-08 16:52:37,043 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:52:37,513 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:52:37,514 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:52:37,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:52:37,537 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:52:37,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:52:37,675 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:52:37,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37 WrapperNode [2024-11-08 16:52:37,676 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:52:37,677 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:52:37,677 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:52:37,677 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:52:37,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,744 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-11-08 16:52:37,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:52:37,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:52:37,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:52:37,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:52:37,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,763 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,779 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 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 [2, 2]. [2024-11-08 16:52:37,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,780 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,794 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,795 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:52:37,801 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:52:37,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:52:37,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:52:37,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (1/1) ... [2024-11-08 16:52:37,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:52:37,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:52:37,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:52:37,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:52:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:52:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:52:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:52:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:52:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 16:52:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 16:52:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:52:37,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:52:38,095 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:52:38,098 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:52:38,411 INFO L? ?]: Removed 58 outVars from TransFormulas that were not future-live. [2024-11-08 16:52:38,411 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:52:38,433 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:52:38,434 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 16:52:38,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:52:38 BoogieIcfgContainer [2024-11-08 16:52:38,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:52:38,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:52:38,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:52:38,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:52:38,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:52:36" (1/3) ... [2024-11-08 16:52:38,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565617bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:52:38, skipping insertion in model container [2024-11-08 16:52:38,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:52:37" (2/3) ... [2024-11-08 16:52:38,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565617bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:52:38, skipping insertion in model container [2024-11-08 16:52:38,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:52:38" (3/3) ... [2024-11-08 16:52:38,448 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2024-11-08 16:52:38,476 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:52:38,476 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-08 16:52:38,527 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:52:38,534 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f1b5d1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:52:38,534 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-08 16:52:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 16:52:38,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:38,548 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:38,548 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:38,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash 121323279, now seen corresponding path program 1 times [2024-11-08 16:52:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764721983] [2024-11-08 16:52:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:38,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:39,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764721983] [2024-11-08 16:52:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764721983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:39,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:39,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:52:39,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433768322] [2024-11-08 16:52:39,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:39,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:52:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:52:39,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:39,060 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:39,129 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2024-11-08 16:52:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:52:39,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-11-08 16:52:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:39,145 INFO L225 Difference]: With dead ends: 57 [2024-11-08 16:52:39,145 INFO L226 Difference]: Without dead ends: 55 [2024-11-08 16:52:39,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:39,156 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:39,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:52:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-08 16:52:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2024-11-08 16:52:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.65625) internal successors, (53), 44 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) [2024-11-08 16:52:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-08 16:52:39,200 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2024-11-08 16:52:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:39,200 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-08 16:52:39,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-08 16:52:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 16:52:39,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:39,202 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:39,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:52:39,202 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:39,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 178581581, now seen corresponding path program 1 times [2024-11-08 16:52:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595744604] [2024-11-08 16:52:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:39,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595744604] [2024-11-08 16:52:39,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595744604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:39,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:39,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:52:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030550017] [2024-11-08 16:52:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:39,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:52:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:52:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:39,939 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:40,122 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-11-08 16:52:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:52:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-11-08 16:52:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:40,125 INFO L225 Difference]: With dead ends: 63 [2024-11-08 16:52:40,125 INFO L226 Difference]: Without dead ends: 63 [2024-11-08 16:52:40,126 INFO L431 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 [2024-11-08 16:52:40,130 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 57 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:40,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 76 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-08 16:52:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2024-11-08 16:52:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.59375) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-08 16:52:40,147 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 8 [2024-11-08 16:52:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:40,147 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-08 16:52:40,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-08 16:52:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 16:52:40,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:40,149 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:40,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:52:40,150 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:40,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash 178581582, now seen corresponding path program 1 times [2024-11-08 16:52:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:40,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924264966] [2024-11-08 16:52:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:40,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:40,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:40,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924264966] [2024-11-08 16:52:40,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924264966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:40,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:52:40,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515537586] [2024-11-08 16:52:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:40,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:52:40,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:52:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:52:40,550 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:40,691 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2024-11-08 16:52:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:52:40,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-11-08 16:52:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:40,695 INFO L225 Difference]: With dead ends: 47 [2024-11-08 16:52:40,697 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 16:52:40,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:52:40,699 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:40,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 106 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 16:52:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-11-08 16:52:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-11-08 16:52:40,707 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 8 [2024-11-08 16:52:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:40,708 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-11-08 16:52:40,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-11-08 16:52:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:52:40,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:40,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:40,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:52:40,710 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:40,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash 637962110, now seen corresponding path program 1 times [2024-11-08 16:52:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:40,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056174329] [2024-11-08 16:52:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:40,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:40,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056174329] [2024-11-08 16:52:40,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056174329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:40,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:40,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:52:40,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485797175] [2024-11-08 16:52:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:40,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:52:40,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:52:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:40,786 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:40,821 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2024-11-08 16:52:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:52:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-11-08 16:52:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:40,824 INFO L225 Difference]: With dead ends: 64 [2024-11-08 16:52:40,824 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 16:52:40,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:40,826 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:40,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:52:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 16:52:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2024-11-08 16:52:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-08 16:52:40,834 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 10 [2024-11-08 16:52:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:40,835 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-08 16:52:40,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-08 16:52:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:52:40,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:40,836 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:40,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 16:52:40,837 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:40,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:40,838 INFO L85 PathProgramCache]: Analyzing trace with hash 637972938, now seen corresponding path program 1 times [2024-11-08 16:52:40,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:40,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899003342] [2024-11-08 16:52:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:40,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:41,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:41,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899003342] [2024-11-08 16:52:41,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899003342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:41,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:41,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:52:41,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824916212] [2024-11-08 16:52:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:41,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:52:41,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:52:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:41,045 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:41,134 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2024-11-08 16:52:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:52:41,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-11-08 16:52:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:41,137 INFO L225 Difference]: With dead ends: 69 [2024-11-08 16:52:41,139 INFO L226 Difference]: Without dead ends: 69 [2024-11-08 16:52:41,139 INFO L431 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 [2024-11-08 16:52:41,141 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:41,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 105 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-08 16:52:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2024-11-08 16:52:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.5) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2024-11-08 16:52:41,156 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 10 [2024-11-08 16:52:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:41,157 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2024-11-08 16:52:41,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2024-11-08 16:52:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:52:41,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:41,158 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:41,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 16:52:41,163 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:41,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1881997824, now seen corresponding path program 1 times [2024-11-08 16:52:41,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:41,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684973717] [2024-11-08 16:52:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:41,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684973717] [2024-11-08 16:52:41,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684973717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:41,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:41,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:52:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477760854] [2024-11-08 16:52:41,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:41,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:52:41,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:52:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:52:41,339 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:41,417 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-11-08 16:52:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:52:41,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-11-08 16:52:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:41,419 INFO L225 Difference]: With dead ends: 66 [2024-11-08 16:52:41,419 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 16:52:41,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:52:41,420 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:41,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 82 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 16:52:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-08 16:52:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 64 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) [2024-11-08 16:52:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2024-11-08 16:52:41,437 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 10 [2024-11-08 16:52:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:41,440 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2024-11-08 16:52:41,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2024-11-08 16:52:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:52:41,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:41,441 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:41,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:52:41,442 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:41,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1881997823, now seen corresponding path program 1 times [2024-11-08 16:52:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269545] [2024-11-08 16:52:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:41,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:41,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269545] [2024-11-08 16:52:41,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:41,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:41,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:52:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368372401] [2024-11-08 16:52:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:41,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:52:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:52:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:52:41,749 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:41,932 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2024-11-08 16:52:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:52:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-11-08 16:52:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:41,934 INFO L225 Difference]: With dead ends: 73 [2024-11-08 16:52:41,937 INFO L226 Difference]: Without dead ends: 73 [2024-11-08 16:52:41,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:52:41,939 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:41,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 92 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-08 16:52:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-11-08 16:52:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.467741935483871) internal successors, (91), 70 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2024-11-08 16:52:41,954 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 10 [2024-11-08 16:52:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:41,955 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2024-11-08 16:52:41,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2024-11-08 16:52:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:52:41,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:41,956 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:41,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:52:41,956 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:41,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:41,957 INFO L85 PathProgramCache]: Analyzing trace with hash -171373688, now seen corresponding path program 1 times [2024-11-08 16:52:41,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:41,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371907095] [2024-11-08 16:52:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:41,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:42,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:42,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371907095] [2024-11-08 16:52:42,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371907095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:42,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:42,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:52:42,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063563847] [2024-11-08 16:52:42,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:42,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:52:42,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:42,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:52:42,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:52:42,261 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:42,376 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2024-11-08 16:52:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:52:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-11-08 16:52:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:42,377 INFO L225 Difference]: With dead ends: 86 [2024-11-08 16:52:42,380 INFO L226 Difference]: Without dead ends: 86 [2024-11-08 16:52:42,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:52:42,381 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:42,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 100 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-08 16:52:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-11-08 16:52:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.467741935483871) internal successors, (91), 70 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2024-11-08 16:52:42,391 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 10 [2024-11-08 16:52:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:42,395 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2024-11-08 16:52:42,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2024-11-08 16:52:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:52:42,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:42,396 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:42,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 16:52:42,397 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:42,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1697675409, now seen corresponding path program 1 times [2024-11-08 16:52:42,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:42,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257383357] [2024-11-08 16:52:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:42,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:42,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:42,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257383357] [2024-11-08 16:52:42,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257383357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:42,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:42,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:52:42,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428334574] [2024-11-08 16:52:42,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:42,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:52:42,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:42,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:52:42,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:42,573 INFO L87 Difference]: Start difference. First operand 71 states and 91 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) [2024-11-08 16:52:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:42,616 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-11-08 16:52:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:52:42,618 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 [2024-11-08 16:52:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:42,619 INFO L225 Difference]: With dead ends: 78 [2024-11-08 16:52:42,619 INFO L226 Difference]: Without dead ends: 78 [2024-11-08 16:52:42,620 INFO L431 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 [2024-11-08 16:52:42,620 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:42,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 73 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:52:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-08 16:52:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2024-11-08 16:52:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 75 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2024-11-08 16:52:42,635 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 11 [2024-11-08 16:52:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:42,635 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2024-11-08 16:52:42,636 INFO L472 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) [2024-11-08 16:52:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2024-11-08 16:52:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:52:42,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:42,640 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:42,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 16:52:42,641 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:42,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1787945261, now seen corresponding path program 1 times [2024-11-08 16:52:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:42,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051695609] [2024-11-08 16:52:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051695609] [2024-11-08 16:52:42,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051695609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:42,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:42,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:52:42,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108605312] [2024-11-08 16:52:42,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:42,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:52:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:52:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:52:42,815 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2024-11-08 16:52:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:42,857 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-11-08 16:52:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:52:42,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 [2024-11-08 16:52:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:42,859 INFO L225 Difference]: With dead ends: 75 [2024-11-08 16:52:42,859 INFO L226 Difference]: Without dead ends: 75 [2024-11-08 16:52:42,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:52:42,861 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:42,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 51 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:52:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-08 16:52:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2024-11-08 16:52:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 69 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2024-11-08 16:52:42,871 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 11 [2024-11-08 16:52:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:42,872 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2024-11-08 16:52:42,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2024-11-08 16:52:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2024-11-08 16:52:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 16:52:42,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:42,877 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:42,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 16:52:42,877 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:42,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1390997254, now seen corresponding path program 1 times [2024-11-08 16:52:42,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:42,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839777792] [2024-11-08 16:52:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:42,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839777792] [2024-11-08 16:52:43,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839777792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:52:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802928577] [2024-11-08 16:52:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:43,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:52:43,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:52:43,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:52:43,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:52:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:43,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 16:52:43,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:52:43,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:52:43,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:52:43,596 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 10 treesize of output 8 [2024-11-08 16:52:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:43,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:52:44,270 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:52:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802928577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:52:44,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:52:44,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-08 16:52:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533995879] [2024-11-08 16:52:44,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:52:44,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 16:52:44,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 16:52:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:52:44,355 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:44,652 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-11-08 16:52:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:52:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 16:52:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:44,654 INFO L225 Difference]: With dead ends: 73 [2024-11-08 16:52:44,654 INFO L226 Difference]: Without dead ends: 73 [2024-11-08 16:52:44,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:52:44,656 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:44,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 158 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:52:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-08 16:52:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2024-11-08 16:52:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 64 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) [2024-11-08 16:52:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2024-11-08 16:52:44,662 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 12 [2024-11-08 16:52:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:44,662 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2024-11-08 16:52:44,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2024-11-08 16:52:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:52:44,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:44,664 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:44,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:52:44,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 16:52:44,868 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:44,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:44,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2086764269, now seen corresponding path program 1 times [2024-11-08 16:52:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:44,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559651244] [2024-11-08 16:52:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:44,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:44,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:44,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559651244] [2024-11-08 16:52:44,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559651244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:44,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:44,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:52:44,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384461099] [2024-11-08 16:52:44,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:44,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:52:44,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:52:44,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:52:44,960 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 5 states, 4 states have (on average 3.5) 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) [2024-11-08 16:52:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:45,029 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2024-11-08 16:52:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:52:45,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) 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 [2024-11-08 16:52:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:45,031 INFO L225 Difference]: With dead ends: 64 [2024-11-08 16:52:45,031 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 16:52:45,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:52:45,032 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:45,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 83 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 16:52:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-08 16:52:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.396551724137931) internal successors, (81), 63 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) [2024-11-08 16:52:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2024-11-08 16:52:45,037 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 14 [2024-11-08 16:52:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:45,037 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2024-11-08 16:52:45,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) 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) [2024-11-08 16:52:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2024-11-08 16:52:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:52:45,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:45,039 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:45,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 16:52:45,039 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:45,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2086764270, now seen corresponding path program 1 times [2024-11-08 16:52:45,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:45,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832851993] [2024-11-08 16:52:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:45,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:45,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:45,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832851993] [2024-11-08 16:52:45,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832851993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:45,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:45,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:52:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239349289] [2024-11-08 16:52:45,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:45,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:52:45,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:52:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:52:45,220 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) 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) [2024-11-08 16:52:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:45,349 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2024-11-08 16:52:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:52:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) 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 [2024-11-08 16:52:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:45,351 INFO L225 Difference]: With dead ends: 71 [2024-11-08 16:52:45,351 INFO L226 Difference]: Without dead ends: 71 [2024-11-08 16:52:45,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:52:45,352 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:45,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 138 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-08 16:52:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2024-11-08 16:52:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 65 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) [2024-11-08 16:52:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2024-11-08 16:52:45,358 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 14 [2024-11-08 16:52:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:45,358 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2024-11-08 16:52:45,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) 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) [2024-11-08 16:52:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2024-11-08 16:52:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:52:45,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:45,360 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:45,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 16:52:45,360 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:45,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1378543481, now seen corresponding path program 1 times [2024-11-08 16:52:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:45,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760390780] [2024-11-08 16:52:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:45,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:45,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760390780] [2024-11-08 16:52:45,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760390780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:52:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62327592] [2024-11-08 16:52:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:52:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:52:45,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:52:45,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:52:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:46,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:52:46,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:52:46,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:52:46,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:52:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:46,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:52:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:46,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62327592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:52:46,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:52:46,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-08 16:52:46,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079795730] [2024-11-08 16:52:46,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:52:46,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 16:52:46,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 16:52:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:52:46,829 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 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) [2024-11-08 16:52:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:47,387 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2024-11-08 16:52:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:52:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 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 14 [2024-11-08 16:52:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:47,390 INFO L225 Difference]: With dead ends: 75 [2024-11-08 16:52:47,390 INFO L226 Difference]: Without dead ends: 75 [2024-11-08 16:52:47,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:52:47,391 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:47,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 195 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:52:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-08 16:52:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2024-11-08 16:52:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-11-08 16:52:47,395 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 14 [2024-11-08 16:52:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:47,396 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-11-08 16:52:47,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 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) [2024-11-08 16:52:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-11-08 16:52:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:52:47,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:47,397 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:47,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:52:47,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 16:52:47,599 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:47,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1023949888, now seen corresponding path program 1 times [2024-11-08 16:52:47,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:47,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276328003] [2024-11-08 16:52:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:47,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:47,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:47,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276328003] [2024-11-08 16:52:47,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276328003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:47,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:47,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:52:47,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172872774] [2024-11-08 16:52:47,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:47,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:52:47,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:52:47,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:52:47,919 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) 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) [2024-11-08 16:52:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:47,974 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-11-08 16:52:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:52:47,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) 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 [2024-11-08 16:52:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:47,976 INFO L225 Difference]: With dead ends: 58 [2024-11-08 16:52:47,976 INFO L226 Difference]: Without dead ends: 58 [2024-11-08 16:52:47,978 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:52:47,979 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:47,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 69 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-08 16:52:47,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2024-11-08 16:52:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-11-08 16:52:47,982 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 14 [2024-11-08 16:52:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:47,982 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-11-08 16:52:47,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) 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) [2024-11-08 16:52:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-08 16:52:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 16:52:47,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:47,983 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:47,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 16:52:47,983 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:47,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1437727380, now seen corresponding path program 1 times [2024-11-08 16:52:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:47,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920549112] [2024-11-08 16:52:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:48,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:48,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920549112] [2024-11-08 16:52:48,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920549112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:48,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:48,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:52:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726411626] [2024-11-08 16:52:48,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:48,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:52:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:52:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:52:48,094 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:48,189 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-11-08 16:52:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:52:48,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-08 16:52:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:48,190 INFO L225 Difference]: With dead ends: 47 [2024-11-08 16:52:48,191 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 16:52:48,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:52:48,192 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:48,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 94 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 16:52:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-11-08 16:52:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.255813953488372) internal successors, (54), 45 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) [2024-11-08 16:52:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-11-08 16:52:48,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 17 [2024-11-08 16:52:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:48,195 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-11-08 16:52:48,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-11-08 16:52:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 16:52:48,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:48,197 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:48,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-08 16:52:48,197 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:48,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1437727381, now seen corresponding path program 1 times [2024-11-08 16:52:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:48,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116941611] [2024-11-08 16:52:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:48,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:48,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116941611] [2024-11-08 16:52:48,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116941611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:48,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:48,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 16:52:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609644813] [2024-11-08 16:52:48,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:48,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:52:48,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:52:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:52:48,502 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:48,675 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-11-08 16:52:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:52:48,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-08 16:52:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:48,677 INFO L225 Difference]: With dead ends: 54 [2024-11-08 16:52:48,677 INFO L226 Difference]: Without dead ends: 54 [2024-11-08 16:52:48,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:52:48,678 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:48,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 114 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-08 16:52:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-11-08 16:52:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-11-08 16:52:48,681 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 17 [2024-11-08 16:52:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:48,682 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-11-08 16:52:48,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-11-08 16:52:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:52:48,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:48,683 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:48,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 16:52:48,683 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:48,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 726633408, now seen corresponding path program 1 times [2024-11-08 16:52:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932384161] [2024-11-08 16:52:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932384161] [2024-11-08 16:52:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932384161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:52:48,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510275120] [2024-11-08 16:52:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:48,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:52:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:48,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:52:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:48,856 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:48,886 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-11-08 16:52:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:52:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:52:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:48,888 INFO L225 Difference]: With dead ends: 47 [2024-11-08 16:52:48,888 INFO L226 Difference]: Without dead ends: 44 [2024-11-08 16:52:48,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:52:48,889 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 56 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 [2024-11-08 16:52:48,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:52:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-08 16:52:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-08 16:52:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-08 16:52:48,892 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 22 [2024-11-08 16:52:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:48,892 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-08 16:52:48,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-08 16:52:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:52:48,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:48,893 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:48,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-08 16:52:48,894 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:48,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash 726688507, now seen corresponding path program 1 times [2024-11-08 16:52:48,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:48,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777082628] [2024-11-08 16:52:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:48,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:49,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777082628] [2024-11-08 16:52:49,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777082628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:49,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:49,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 16:52:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343247128] [2024-11-08 16:52:49,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:49,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 16:52:49,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 16:52:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:52:49,169 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:49,305 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2024-11-08 16:52:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:52:49,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:52:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:49,307 INFO L225 Difference]: With dead ends: 55 [2024-11-08 16:52:49,307 INFO L226 Difference]: Without dead ends: 35 [2024-11-08 16:52:49,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:52:49,308 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:49,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 193 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-08 16:52:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-08 16:52:49,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-08 16:52:49,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 22 [2024-11-08 16:52:49,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:49,312 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-08 16:52:49,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-08 16:52:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:52:49,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:49,315 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:49,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 16:52:49,315 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:49,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash -962255235, now seen corresponding path program 1 times [2024-11-08 16:52:49,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:49,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942870485] [2024-11-08 16:52:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:49,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:49,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:49,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942870485] [2024-11-08 16:52:49,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942870485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:49,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-08 16:52:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606158438] [2024-11-08 16:52:49,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:49,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:52:49,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:52:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:52:49,692 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:49,861 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-11-08 16:52:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:52:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:52:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:49,862 INFO L225 Difference]: With dead ends: 50 [2024-11-08 16:52:49,863 INFO L226 Difference]: Without dead ends: 39 [2024-11-08 16:52:49,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:52:49,864 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:49,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 169 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-08 16:52:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-11-08 16:52:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-08 16:52:49,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2024-11-08 16:52:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:49,869 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-08 16:52:49,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-08 16:52:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 16:52:49,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:49,872 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:49,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 16:52:49,872 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:49,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -858612747, now seen corresponding path program 1 times [2024-11-08 16:52:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:49,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637889064] [2024-11-08 16:52:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:49,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:50,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:50,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637889064] [2024-11-08 16:52:50,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637889064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:52:50,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053000605] [2024-11-08 16:52:50,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:50,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:52:50,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:52:50,414 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:52:50,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:52:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:50,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 16:52:50,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:52:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:50,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:52:51,098 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 [2024-11-08 16:52:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:51,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053000605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:52:51,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:52:51,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-11-08 16:52:51,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194592608] [2024-11-08 16:52:51,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:52:51,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:52:51,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:52:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:52:51,154 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:51,641 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-11-08 16:52:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 16:52:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 16:52:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:51,642 INFO L225 Difference]: With dead ends: 48 [2024-11-08 16:52:51,642 INFO L226 Difference]: Without dead ends: 48 [2024-11-08 16:52:51,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-11-08 16:52:51,643 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:51,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 285 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:52:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-08 16:52:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-11-08 16:52:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.2) internal successors, (48), 41 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) [2024-11-08 16:52:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-08 16:52:51,647 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2024-11-08 16:52:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:51,647 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-08 16:52:51,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-08 16:52:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 16:52:51,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:51,649 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:51,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:52:51,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-08 16:52:51,850 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:51,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash -858614925, now seen corresponding path program 1 times [2024-11-08 16:52:51,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:51,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560151329] [2024-11-08 16:52:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:52:52,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:52,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560151329] [2024-11-08 16:52:52,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560151329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:52,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:52,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 16:52:52,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149980660] [2024-11-08 16:52:52,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:52,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 16:52:52,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:52,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 16:52:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:52:52,142 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:52,229 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2024-11-08 16:52:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:52:52,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 16:52:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:52,230 INFO L225 Difference]: With dead ends: 69 [2024-11-08 16:52:52,230 INFO L226 Difference]: Without dead ends: 69 [2024-11-08 16:52:52,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:52:52,231 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:52,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 187 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-08 16:52:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2024-11-08 16:52:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2024-11-08 16:52:52,235 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 26 [2024-11-08 16:52:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:52,235 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2024-11-08 16:52:52,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2024-11-08 16:52:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 16:52:52,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:52,237 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:52,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-08 16:52:52,237 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:52,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash -992628431, now seen corresponding path program 1 times [2024-11-08 16:52:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:52,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473467920] [2024-11-08 16:52:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:52:52,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:52,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473467920] [2024-11-08 16:52:52,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473467920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:52:52,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:52:52,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 16:52:52,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728838224] [2024-11-08 16:52:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:52:52,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 16:52:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 16:52:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:52:52,570 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:52,702 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2024-11-08 16:52:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:52:52,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 16:52:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:52,703 INFO L225 Difference]: With dead ends: 99 [2024-11-08 16:52:52,703 INFO L226 Difference]: Without dead ends: 99 [2024-11-08 16:52:52,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:52:52,705 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:52,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 158 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:52:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-08 16:52:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2024-11-08 16:52:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 68 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2024-11-08 16:52:52,710 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 26 [2024-11-08 16:52:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:52,710 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2024-11-08 16:52:52,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2024-11-08 16:52:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 16:52:52,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:52,711 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:52,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-08 16:52:52,711 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:52,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1611358441, now seen corresponding path program 1 times [2024-11-08 16:52:52,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:52,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649751684] [2024-11-08 16:52:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:52,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:52:53,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:53,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649751684] [2024-11-08 16:52:53,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649751684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:52:53,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633965995] [2024-11-08 16:52:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:53,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:52:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:52:53,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:52:53,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:52:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:53,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 16:52:53,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:52:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:52:53,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:52:53,603 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 [2024-11-08 16:52:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:52:53,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633965995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:52:53,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:52:53,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-08 16:52:53,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692687053] [2024-11-08 16:52:53,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:52:53,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 16:52:53,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 16:52:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:52:53,668 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:52:53,996 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-11-08 16:52:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:52:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-08 16:52:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:52:53,998 INFO L225 Difference]: With dead ends: 88 [2024-11-08 16:52:53,998 INFO L226 Difference]: Without dead ends: 88 [2024-11-08 16:52:53,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-08 16:52:53,999 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:52:54,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 398 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:52:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-08 16:52:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-11-08 16:52:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2024-11-08 16:52:54,004 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 30 [2024-11-08 16:52:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:52:54,005 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2024-11-08 16:52:54,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:52:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2024-11-08 16:52:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 16:52:54,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:52:54,006 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:52:54,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:52:54,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-08 16:52:54,212 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:52:54,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:52:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2009227877, now seen corresponding path program 2 times [2024-11-08 16:52:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:52:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819412569] [2024-11-08 16:52:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:54,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:52:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:54,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819412569] [2024-11-08 16:52:54,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819412569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:52:54,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289785743] [2024-11-08 16:52:54,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:52:54,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:52:54,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:52:54,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:52:54,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:52:54,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:52:54,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:52:54,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-08 16:52:54,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:52:55,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:52:55,112 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 [2024-11-08 16:52:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:52:55,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:52:55,499 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 15 treesize of output 10 [2024-11-08 16:52:56,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:52:56,241 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 20 treesize of output 17 [2024-11-08 16:52:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:56,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:52:58,024 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 19 treesize of output 17 [2024-11-08 16:52:58,034 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 36 treesize of output 32 [2024-11-08 16:52:58,044 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 [2024-11-08 16:52:58,218 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 [2024-11-08 16:52:58,223 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 [2024-11-08 16:52:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:52:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289785743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:52:58,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:52:58,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 48 [2024-11-08 16:52:58,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986554519] [2024-11-08 16:52:58,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:52:58,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 16:52:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:52:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 16:52:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2116, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 16:52:58,764 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 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) [2024-11-08 16:53:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:01,476 INFO L93 Difference]: Finished difference Result 191 states and 210 transitions. [2024-11-08 16:53:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-08 16:53:01,477 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 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) Word has length 31 [2024-11-08 16:53:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:01,478 INFO L225 Difference]: With dead ends: 191 [2024-11-08 16:53:01,478 INFO L226 Difference]: Without dead ends: 151 [2024-11-08 16:53:01,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=364, Invalid=5186, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 16:53:01,481 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:01,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 386 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 16:53:01,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-08 16:53:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2024-11-08 16:53:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 136 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2024-11-08 16:53:01,487 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 31 [2024-11-08 16:53:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:01,487 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2024-11-08 16:53:01,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 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) [2024-11-08 16:53:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2024-11-08 16:53:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 16:53:01,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:01,489 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:01,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:53:01,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-08 16:53:01,690 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:01,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 864044837, now seen corresponding path program 1 times [2024-11-08 16:53:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000220980] [2024-11-08 16:53:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:02,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:02,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000220980] [2024-11-08 16:53:02,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000220980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:02,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697915906] [2024-11-08 16:53:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:02,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:02,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:02,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:02,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:53:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:02,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-08 16:53:02,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:02,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:02,943 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 [2024-11-08 16:53:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697915906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:03,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:03,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2024-11-08 16:53:03,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696789730] [2024-11-08 16:53:03,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:03,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 16:53:03,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:03,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 16:53:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:53:03,020 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 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) [2024-11-08 16:53:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:03,700 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2024-11-08 16:53:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 16:53:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 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) Word has length 35 [2024-11-08 16:53:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:03,701 INFO L225 Difference]: With dead ends: 194 [2024-11-08 16:53:03,701 INFO L226 Difference]: Without dead ends: 194 [2024-11-08 16:53:03,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 16:53:03,703 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:03,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 376 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:53:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-08 16:53:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 129. [2024-11-08 16:53:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 128 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2024-11-08 16:53:03,708 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 35 [2024-11-08 16:53:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:03,709 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2024-11-08 16:53:03,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 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) [2024-11-08 16:53:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2024-11-08 16:53:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 16:53:03,710 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:03,710 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:03,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:03,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-08 16:53:03,914 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:03,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:03,915 INFO L85 PathProgramCache]: Analyzing trace with hash -626912908, now seen corresponding path program 2 times [2024-11-08 16:53:03,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:03,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387506086] [2024-11-08 16:53:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:03,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:04,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387506086] [2024-11-08 16:53:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387506086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687123603] [2024-11-08 16:53:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:53:04,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:04,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:04,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:04,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:53:04,601 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:53:04,601 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:04,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-08 16:53:04,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:04,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:53:04,815 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 8 treesize of output 1 [2024-11-08 16:53:05,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:53:05,302 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 21 treesize of output 11 [2024-11-08 16:53:05,429 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 7 treesize of output 3 [2024-11-08 16:53:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:05,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:06,439 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 23 treesize of output 19 [2024-11-08 16:53:06,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2024-11-08 16:53:06,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:53:06,520 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 69 treesize of output 53 [2024-11-08 16:53:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:06,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687123603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:06,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:06,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 23] total 52 [2024-11-08 16:53:06,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209864347] [2024-11-08 16:53:06,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:06,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-08 16:53:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-08 16:53:06,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 16:53:06,823 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 52 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:08,567 INFO L93 Difference]: Finished difference Result 241 states and 268 transitions. [2024-11-08 16:53:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-08 16:53:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 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 38 [2024-11-08 16:53:08,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:08,569 INFO L225 Difference]: With dead ends: 241 [2024-11-08 16:53:08,569 INFO L226 Difference]: Without dead ends: 221 [2024-11-08 16:53:08,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=441, Invalid=4815, Unknown=0, NotChecked=0, Total=5256 [2024-11-08 16:53:08,573 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:08,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 648 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 16:53:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-08 16:53:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2024-11-08 16:53:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 167 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2024-11-08 16:53:08,579 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 38 [2024-11-08 16:53:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:08,579 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2024-11-08 16:53:08,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2024-11-08 16:53:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 16:53:08,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:08,581 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:08,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:08,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-08 16:53:08,785 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:08,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1582942419, now seen corresponding path program 3 times [2024-11-08 16:53:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:08,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126457094] [2024-11-08 16:53:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:08,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:09,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:09,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126457094] [2024-11-08 16:53:09,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126457094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:09,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207580732] [2024-11-08 16:53:09,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:53:09,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:09,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:09,283 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:09,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:53:09,427 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 16:53:09,427 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:09,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 16:53:09,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:09,562 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 [2024-11-08 16:53:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:09,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:09,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:53:09,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:53:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207580732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:09,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:09,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 27 [2024-11-08 16:53:09,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59916796] [2024-11-08 16:53:09,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:09,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 16:53:09,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 16:53:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:53:09,834 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:10,449 INFO L93 Difference]: Finished difference Result 281 states and 313 transitions. [2024-11-08 16:53:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 16:53:10,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2024-11-08 16:53:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:10,451 INFO L225 Difference]: With dead ends: 281 [2024-11-08 16:53:10,451 INFO L226 Difference]: Without dead ends: 225 [2024-11-08 16:53:10,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 16:53:10,452 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:10,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 491 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:53:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-08 16:53:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2024-11-08 16:53:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1352657004830917) internal successors, (235), 208 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 235 transitions. [2024-11-08 16:53:10,459 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 235 transitions. Word has length 40 [2024-11-08 16:53:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:10,460 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 235 transitions. [2024-11-08 16:53:10,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 235 transitions. [2024-11-08 16:53:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 16:53:10,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:10,462 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:10,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 16:53:10,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-08 16:53:10,663 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:10,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1307962668, now seen corresponding path program 3 times [2024-11-08 16:53:10,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953457045] [2024-11-08 16:53:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:11,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953457045] [2024-11-08 16:53:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953457045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394047984] [2024-11-08 16:53:11,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:53:11,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:11,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:11,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:11,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:53:11,238 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 16:53:11,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:11,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 16:53:11,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:11,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:11,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 16:53:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:53:11,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394047984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:11,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:11,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-08 16:53:11,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833817527] [2024-11-08 16:53:11,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:11,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 16:53:11,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:11,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 16:53:11,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-08 16:53:11,874 INFO L87 Difference]: Start difference. First operand 209 states and 235 transitions. Second operand has 26 states, 25 states have (on average 4.04) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:12,259 INFO L93 Difference]: Finished difference Result 252 states and 281 transitions. [2024-11-08 16:53:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 16:53:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.04) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 16:53:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:12,261 INFO L225 Difference]: With dead ends: 252 [2024-11-08 16:53:12,261 INFO L226 Difference]: Without dead ends: 252 [2024-11-08 16:53:12,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-11-08 16:53:12,263 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:12,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 535 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:53:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-08 16:53:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2024-11-08 16:53:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 249 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2024-11-08 16:53:12,270 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 42 [2024-11-08 16:53:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:12,271 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2024-11-08 16:53:12,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.04) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2024-11-08 16:53:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 16:53:12,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:12,272 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:12,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:12,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 16:53:12,473 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:12,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1658962267, now seen corresponding path program 4 times [2024-11-08 16:53:12,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:12,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489124456] [2024-11-08 16:53:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:12,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489124456] [2024-11-08 16:53:13,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489124456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829205426] [2024-11-08 16:53:13,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:53:13,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:13,038 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:13,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:53:13,180 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:53:13,180 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:13,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-08 16:53:13,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:13,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:13,836 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 [2024-11-08 16:53:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:13,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829205426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:13,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:13,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-11-08 16:53:13,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072472167] [2024-11-08 16:53:13,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:13,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 16:53:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:13,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 16:53:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-11-08 16:53:13,941 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:14,709 INFO L93 Difference]: Finished difference Result 365 states and 404 transitions. [2024-11-08 16:53:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 16:53:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-08 16:53:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:14,711 INFO L225 Difference]: With dead ends: 365 [2024-11-08 16:53:14,712 INFO L226 Difference]: Without dead ends: 365 [2024-11-08 16:53:14,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 16:53:14,713 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:14,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 489 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 16:53:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-08 16:53:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 275. [2024-11-08 16:53:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.1355311355311355) internal successors, (310), 274 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 310 transitions. [2024-11-08 16:53:14,739 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 310 transitions. Word has length 44 [2024-11-08 16:53:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:14,739 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 310 transitions. [2024-11-08 16:53:14,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 310 transitions. [2024-11-08 16:53:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 16:53:14,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:14,740 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:14,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:14,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:14,944 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:14,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash -868472597, now seen corresponding path program 5 times [2024-11-08 16:53:14,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:14,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206148682] [2024-11-08 16:53:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:14,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:15,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:15,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206148682] [2024-11-08 16:53:15,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206148682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:15,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510406378] [2024-11-08 16:53:15,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:53:15,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:15,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:15,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:53:15,788 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-08 16:53:15,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:15,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 16:53:15,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:15,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:53:16,004 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 [2024-11-08 16:53:16,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:53:16,977 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 20 treesize of output 15 [2024-11-08 16:53:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:17,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:17,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:53:17,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:53:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:18,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510406378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:18,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:18,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-08 16:53:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512678604] [2024-11-08 16:53:18,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:18,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 16:53:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 16:53:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2332, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:53:18,692 INFO L87 Difference]: Start difference. First operand 275 states and 310 transitions. Second operand has 51 states, 51 states have (on average 2.7254901960784315) internal successors, (139), 51 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:24,106 INFO L93 Difference]: Finished difference Result 628 states and 687 transitions. [2024-11-08 16:53:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-08 16:53:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.7254901960784315) internal successors, (139), 51 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-08 16:53:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:24,108 INFO L225 Difference]: With dead ends: 628 [2024-11-08 16:53:24,109 INFO L226 Difference]: Without dead ends: 555 [2024-11-08 16:53:24,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=569, Invalid=5751, Unknown=0, NotChecked=0, Total=6320 [2024-11-08 16:53:24,110 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 285 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:24,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 658 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1230 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2024-11-08 16:53:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-11-08 16:53:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 372. [2024-11-08 16:53:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 370 states have (on average 1.1324324324324324) internal successors, (419), 371 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 419 transitions. [2024-11-08 16:53:24,126 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 419 transitions. Word has length 49 [2024-11-08 16:53:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:24,126 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 419 transitions. [2024-11-08 16:53:24,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.7254901960784315) internal successors, (139), 51 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 419 transitions. [2024-11-08 16:53:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 16:53:24,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:24,128 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:24,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:24,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-08 16:53:24,332 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:24,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:24,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2032773815, now seen corresponding path program 4 times [2024-11-08 16:53:24,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:24,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740618806] [2024-11-08 16:53:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:26,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740618806] [2024-11-08 16:53:26,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740618806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509879405] [2024-11-08 16:53:26,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:53:26,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:26,328 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:26,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:53:26,485 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:53:26,485 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:26,494 WARN L253 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-08 16:53:26,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:26,699 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 15 treesize of output 1 [2024-11-08 16:53:26,780 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 [2024-11-08 16:53:26,889 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 [2024-11-08 16:53:30,134 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-08 16:53:30,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 46 [2024-11-08 16:53:30,817 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-08 16:53:30,818 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 48 treesize of output 33 [2024-11-08 16:53:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:53:31,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:35,333 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 54 treesize of output 48 [2024-11-08 16:53:35,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 88 [2024-11-08 16:53:35,366 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 [2024-11-08 16:53:35,562 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 18 treesize of output 16 [2024-11-08 16:53:35,566 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 73 treesize of output 69 [2024-11-08 16:53:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:53:35,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509879405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:35,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:35,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 82 [2024-11-08 16:53:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793121838] [2024-11-08 16:53:35,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:35,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-08 16:53:35,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:35,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-08 16:53:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=6216, Unknown=0, NotChecked=0, Total=6642 [2024-11-08 16:53:35,832 INFO L87 Difference]: Start difference. First operand 372 states and 419 transitions. Second operand has 82 states, 82 states have (on average 1.5853658536585367) internal successors, (130), 82 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:49,348 INFO L93 Difference]: Finished difference Result 518 states and 575 transitions. [2024-11-08 16:53:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-08 16:53:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.5853658536585367) internal successors, (130), 82 states have internal predecessors, (130), 0 states have call successors, (0), 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 50 [2024-11-08 16:53:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:49,351 INFO L225 Difference]: With dead ends: 518 [2024-11-08 16:53:49,351 INFO L226 Difference]: Without dead ends: 308 [2024-11-08 16:53:49,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1295, Invalid=17337, Unknown=0, NotChecked=0, Total=18632 [2024-11-08 16:53:49,357 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 75 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 2819 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2819 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:49,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 305 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2819 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2024-11-08 16:53:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-08 16:53:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 174. [2024-11-08 16:53:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.115606936416185) internal successors, (193), 173 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 193 transitions. [2024-11-08 16:53:49,365 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 193 transitions. Word has length 50 [2024-11-08 16:53:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:49,366 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 193 transitions. [2024-11-08 16:53:49,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.5853658536585367) internal successors, (130), 82 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 193 transitions. [2024-11-08 16:53:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 16:53:49,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:49,367 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:49,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:49,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-08 16:53:49,568 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:49,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash -185774115, now seen corresponding path program 6 times [2024-11-08 16:53:49,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:49,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038213834] [2024-11-08 16:53:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:49,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:50,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038213834] [2024-11-08 16:53:50,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038213834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:50,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792359087] [2024-11-08 16:53:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:53:50,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:50,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:50,400 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:50,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:53:50,569 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-08 16:53:50,569 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:50,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-08 16:53:50,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:50,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:53:51,010 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 [2024-11-08 16:53:51,227 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:53:51,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:53:51,232 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 15 treesize of output 10 [2024-11-08 16:53:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:51,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:51,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:53:51,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:53:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:52,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792359087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:52,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:52,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 21] total 47 [2024-11-08 16:53:52,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498906730] [2024-11-08 16:53:52,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:52,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 16:53:52,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 16:53:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2000, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 16:53:52,081 INFO L87 Difference]: Start difference. First operand 174 states and 193 transitions. Second operand has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:54,024 INFO L93 Difference]: Finished difference Result 346 states and 375 transitions. [2024-11-08 16:53:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-08 16:53:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 0 states have call successors, (0), 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 58 [2024-11-08 16:53:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:54,026 INFO L225 Difference]: With dead ends: 346 [2024-11-08 16:53:54,026 INFO L226 Difference]: Without dead ends: 222 [2024-11-08 16:53:54,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=437, Invalid=5569, Unknown=0, NotChecked=0, Total=6006 [2024-11-08 16:53:54,027 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 168 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:54,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 812 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 16:53:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-08 16:53:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 186. [2024-11-08 16:53:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.1081081081081081) internal successors, (205), 185 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 205 transitions. [2024-11-08 16:53:54,034 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 205 transitions. Word has length 58 [2024-11-08 16:53:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:54,034 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 205 transitions. [2024-11-08 16:53:54,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 205 transitions. [2024-11-08 16:53:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 16:53:54,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:54,035 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:54,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:54,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:54,236 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:54,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 317679957, now seen corresponding path program 7 times [2024-11-08 16:53:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:54,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3335982] [2024-11-08 16:53:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:55,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:55,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3335982] [2024-11-08 16:53:55,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3335982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:55,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260076371] [2024-11-08 16:53:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:53:55,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:55,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:55,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:55,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 16:53:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:55,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-08 16:53:55,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:55,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:53:56,144 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 [2024-11-08 16:53:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:56,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260076371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:53:56,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:53:56,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2024-11-08 16:53:56,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224808902] [2024-11-08 16:53:56,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:53:56,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 16:53:56,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:53:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 16:53:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 16:53:56,309 INFO L87 Difference]: Start difference. First operand 186 states and 205 transitions. Second operand has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:53:57,255 INFO L93 Difference]: Finished difference Result 231 states and 252 transitions. [2024-11-08 16:53:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 16:53:57,256 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 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 62 [2024-11-08 16:53:57,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:53:57,257 INFO L225 Difference]: With dead ends: 231 [2024-11-08 16:53:57,257 INFO L226 Difference]: Without dead ends: 231 [2024-11-08 16:53:57,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 16:53:57,258 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:53:57,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 594 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 16:53:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-08 16:53:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2024-11-08 16:53:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.11) internal successors, (222), 200 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2024-11-08 16:53:57,266 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 62 [2024-11-08 16:53:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:53:57,266 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2024-11-08 16:53:57,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:53:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2024-11-08 16:53:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-08 16:53:57,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:53:57,268 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:53:57,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 16:53:57,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:57,469 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:53:57,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:53:57,470 INFO L85 PathProgramCache]: Analyzing trace with hash 686435387, now seen corresponding path program 8 times [2024-11-08 16:53:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:53:57,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362118910] [2024-11-08 16:53:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:53:57,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:53:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:53:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:58,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:53:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362118910] [2024-11-08 16:53:58,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362118910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:53:58,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169022746] [2024-11-08 16:53:58,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:53:58,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:53:58,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:53:58,371 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:53:58,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 16:53:58,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:53:58,536 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:53:58,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-08 16:53:58,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:53:59,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:53:59,128 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 [2024-11-08 16:53:59,333 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:53:59,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:53:59,337 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 15 treesize of output 10 [2024-11-08 16:53:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:53:59,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:00,746 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 19 treesize of output 17 [2024-11-08 16:54:00,753 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 28 treesize of output 24 [2024-11-08 16:54:00,875 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 [2024-11-08 16:54:00,879 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 [2024-11-08 16:54:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:01,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169022746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:01,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:01,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 26] total 70 [2024-11-08 16:54:01,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099239643] [2024-11-08 16:54:01,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:01,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-08 16:54:01,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-08 16:54:01,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4610, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 16:54:01,988 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 70 states, 70 states have (on average 2.7285714285714286) internal successors, (191), 70 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:06,152 INFO L93 Difference]: Finished difference Result 427 states and 459 transitions. [2024-11-08 16:54:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-08 16:54:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.7285714285714286) internal successors, (191), 70 states have internal predecessors, (191), 0 states have call successors, (0), 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 67 [2024-11-08 16:54:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:06,154 INFO L225 Difference]: With dead ends: 427 [2024-11-08 16:54:06,154 INFO L226 Difference]: Without dead ends: 253 [2024-11-08 16:54:06,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=581, Invalid=12759, Unknown=0, NotChecked=0, Total=13340 [2024-11-08 16:54:06,156 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 152 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:06,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1430 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-08 16:54:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-08 16:54:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 213. [2024-11-08 16:54:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1037735849056605) internal successors, (234), 212 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 234 transitions. [2024-11-08 16:54:06,163 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 234 transitions. Word has length 67 [2024-11-08 16:54:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:06,163 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 234 transitions. [2024-11-08 16:54:06,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.7285714285714286) internal successors, (191), 70 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 234 transitions. [2024-11-08 16:54:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-08 16:54:06,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:06,165 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:06,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 16:54:06,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-08 16:54:06,366 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:06,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1537292739, now seen corresponding path program 9 times [2024-11-08 16:54:06,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838477987] [2024-11-08 16:54:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:07,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838477987] [2024-11-08 16:54:07,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838477987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955552277] [2024-11-08 16:54:07,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:54:07,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:07,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:07,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:07,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 16:54:07,512 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-08 16:54:07,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:07,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-08 16:54:07,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:08,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:08,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 16:54:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955552277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:08,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:08,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2024-11-08 16:54:08,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556379001] [2024-11-08 16:54:08,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:08,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-08 16:54:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-08 16:54:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2158, Unknown=0, NotChecked=0, Total=2450 [2024-11-08 16:54:08,902 INFO L87 Difference]: Start difference. First operand 213 states and 234 transitions. Second operand has 50 states, 49 states have (on average 3.5714285714285716) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:10,082 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2024-11-08 16:54:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 16:54:10,083 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.5714285714285716) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 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 71 [2024-11-08 16:54:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:10,084 INFO L225 Difference]: With dead ends: 264 [2024-11-08 16:54:10,084 INFO L226 Difference]: Without dead ends: 264 [2024-11-08 16:54:10,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=528, Invalid=3632, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 16:54:10,085 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 174 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:10,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 721 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 16:54:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-08 16:54:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2024-11-08 16:54:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.105726872246696) internal successors, (251), 227 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 251 transitions. [2024-11-08 16:54:10,093 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 251 transitions. Word has length 71 [2024-11-08 16:54:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:10,093 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 251 transitions. [2024-11-08 16:54:10,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.5714285714285716) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 251 transitions. [2024-11-08 16:54:10,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-08 16:54:10,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:10,095 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:10,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 16:54:10,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:10,296 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:10,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1385132173, now seen corresponding path program 10 times [2024-11-08 16:54:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:10,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050735630] [2024-11-08 16:54:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:10,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:11,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050735630] [2024-11-08 16:54:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050735630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60464700] [2024-11-08 16:54:11,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:54:11,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:11,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:11,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:11,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 16:54:11,627 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:54:11,627 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:11,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-08 16:54:11,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:11,960 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 [2024-11-08 16:54:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:12,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:12,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:54:12,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:54:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:12,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60464700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:12,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:12,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 39 [2024-11-08 16:54:12,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018029937] [2024-11-08 16:54:12,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:12,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 16:54:12,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 16:54:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 16:54:12,433 INFO L87 Difference]: Start difference. First operand 228 states and 251 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:13,865 INFO L93 Difference]: Finished difference Result 408 states and 443 transitions. [2024-11-08 16:54:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 16:54:13,866 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-08 16:54:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:13,867 INFO L225 Difference]: With dead ends: 408 [2024-11-08 16:54:13,867 INFO L226 Difference]: Without dead ends: 249 [2024-11-08 16:54:13,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=224, Invalid=2968, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 16:54:13,868 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:13,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1218 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 16:54:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-08 16:54:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2024-11-08 16:54:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.100418410041841) internal successors, (263), 239 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 263 transitions. [2024-11-08 16:54:13,875 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 263 transitions. Word has length 76 [2024-11-08 16:54:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:13,875 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 263 transitions. [2024-11-08 16:54:13,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 263 transitions. [2024-11-08 16:54:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-08 16:54:13,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:13,877 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:13,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 16:54:14,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:14,081 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:14,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1082450939, now seen corresponding path program 11 times [2024-11-08 16:54:14,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808220927] [2024-11-08 16:54:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808220927] [2024-11-08 16:54:15,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808220927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540125110] [2024-11-08 16:54:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:54:15,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:15,209 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:15,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 16:54:15,447 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 16:54:15,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:15,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-08 16:54:15,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:15,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:54:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:16,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:17,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540125110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:17,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:17,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-11-08 16:54:17,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974834186] [2024-11-08 16:54:17,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:17,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 16:54:17,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 16:54:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 16:54:17,515 INFO L87 Difference]: Start difference. First operand 240 states and 263 transitions. Second operand has 55 states, 54 states have (on average 3.6481481481481484) internal successors, (197), 55 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:19,225 INFO L93 Difference]: Finished difference Result 297 states and 322 transitions. [2024-11-08 16:54:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 16:54:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.6481481481481484) internal successors, (197), 55 states have internal predecessors, (197), 0 states have call successors, (0), 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 80 [2024-11-08 16:54:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:19,227 INFO L225 Difference]: With dead ends: 297 [2024-11-08 16:54:19,227 INFO L226 Difference]: Without dead ends: 297 [2024-11-08 16:54:19,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=589, Invalid=4523, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:54:19,229 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 175 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:19,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1061 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 16:54:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-08 16:54:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 255. [2024-11-08 16:54:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1023622047244095) internal successors, (280), 254 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 280 transitions. [2024-11-08 16:54:19,238 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 280 transitions. Word has length 80 [2024-11-08 16:54:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:19,239 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 280 transitions. [2024-11-08 16:54:19,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.6481481481481484) internal successors, (197), 55 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 280 transitions. [2024-11-08 16:54:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-08 16:54:19,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:19,241 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:19,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 16:54:19,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:19,442 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:19,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2043500661, now seen corresponding path program 12 times [2024-11-08 16:54:19,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027809878] [2024-11-08 16:54:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027809878] [2024-11-08 16:54:20,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027809878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757294325] [2024-11-08 16:54:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:54:20,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:20,722 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:20,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 16:54:20,999 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-08 16:54:20,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:21,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-08 16:54:21,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:21,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:54:21,834 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 [2024-11-08 16:54:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:54:22,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:54:22,083 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 15 treesize of output 10 [2024-11-08 16:54:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:22,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:23,894 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 19 treesize of output 17 [2024-11-08 16:54:23,898 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 28 treesize of output 24 [2024-11-08 16:54:24,034 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 [2024-11-08 16:54:24,039 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 [2024-11-08 16:54:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:25,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757294325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:25,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:25,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 30] total 82 [2024-11-08 16:54:25,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197497338] [2024-11-08 16:54:25,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:25,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-08 16:54:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:25,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-08 16:54:25,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=6382, Unknown=0, NotChecked=0, Total=6642 [2024-11-08 16:54:25,491 INFO L87 Difference]: Start difference. First operand 255 states and 280 transitions. Second operand has 82 states, 82 states have (on average 2.9878048780487805) internal successors, (245), 82 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:31,311 INFO L93 Difference]: Finished difference Result 541 states and 581 transitions. [2024-11-08 16:54:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-08 16:54:31,312 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.9878048780487805) internal successors, (245), 82 states have internal predecessors, (245), 0 states have call successors, (0), 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 85 [2024-11-08 16:54:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:31,314 INFO L225 Difference]: With dead ends: 541 [2024-11-08 16:54:31,314 INFO L226 Difference]: Without dead ends: 315 [2024-11-08 16:54:31,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=705, Invalid=18201, Unknown=0, NotChecked=0, Total=18906 [2024-11-08 16:54:31,316 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 188 mSDsluCounter, 1836 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:31,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1883 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4052 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-08 16:54:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-08 16:54:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 267. [2024-11-08 16:54:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0977443609022557) internal successors, (292), 266 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 292 transitions. [2024-11-08 16:54:31,324 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 292 transitions. Word has length 85 [2024-11-08 16:54:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:31,325 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 292 transitions. [2024-11-08 16:54:31,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.9878048780487805) internal successors, (245), 82 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 292 transitions. [2024-11-08 16:54:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-08 16:54:31,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:31,328 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:31,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-08 16:54:31,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-08 16:54:31,529 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:31,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash 44327699, now seen corresponding path program 13 times [2024-11-08 16:54:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:31,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470582873] [2024-11-08 16:54:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:31,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:32,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:32,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470582873] [2024-11-08 16:54:32,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470582873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:32,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520571678] [2024-11-08 16:54:32,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:54:32,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:32,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:32,982 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:32,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 16:54:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:33,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-08 16:54:33,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:33,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:34,575 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 [2024-11-08 16:54:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520571678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:34,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:34,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2024-11-08 16:54:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423578209] [2024-11-08 16:54:34,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:34,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 16:54:34,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 16:54:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:54:34,866 INFO L87 Difference]: Start difference. First operand 267 states and 292 transitions. Second operand has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 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) [2024-11-08 16:54:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:36,583 INFO L93 Difference]: Finished difference Result 330 states and 357 transitions. [2024-11-08 16:54:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 16:54:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 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) Word has length 89 [2024-11-08 16:54:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:36,585 INFO L225 Difference]: With dead ends: 330 [2024-11-08 16:54:36,585 INFO L226 Difference]: Without dead ends: 330 [2024-11-08 16:54:36,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 142 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=494, Invalid=4336, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 16:54:36,587 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 180 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:36,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1055 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 16:54:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-08 16:54:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 282. [2024-11-08 16:54:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.099644128113879) internal successors, (309), 281 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 309 transitions. [2024-11-08 16:54:36,597 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 309 transitions. Word has length 89 [2024-11-08 16:54:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:36,597 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 309 transitions. [2024-11-08 16:54:36,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 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) [2024-11-08 16:54:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 309 transitions. [2024-11-08 16:54:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-08 16:54:36,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:36,599 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:36,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 16:54:36,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-08 16:54:36,800 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:36,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 346134845, now seen corresponding path program 14 times [2024-11-08 16:54:36,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:36,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041821508] [2024-11-08 16:54:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:36,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 26 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:38,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041821508] [2024-11-08 16:54:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041821508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:38,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546616207] [2024-11-08 16:54:38,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:54:38,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:38,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:38,073 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:38,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 16:54:38,282 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:54:38,282 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:38,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-08 16:54:38,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:38,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:54:39,046 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 [2024-11-08 16:54:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:54:39,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:54:39,286 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 15 treesize of output 10 [2024-11-08 16:54:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:40,167 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:41,299 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 19 treesize of output 17 [2024-11-08 16:54:41,303 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 28 treesize of output 24 [2024-11-08 16:54:41,438 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 [2024-11-08 16:54:41,442 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 [2024-11-08 16:54:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:43,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546616207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:43,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:43,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 32] total 88 [2024-11-08 16:54:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107848548] [2024-11-08 16:54:43,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:43,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-08 16:54:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-08 16:54:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=7376, Unknown=0, NotChecked=0, Total=7656 [2024-11-08 16:54:43,262 INFO L87 Difference]: Start difference. First operand 282 states and 309 transitions. Second operand has 88 states, 88 states have (on average 3.090909090909091) internal successors, (272), 88 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:49,818 INFO L93 Difference]: Finished difference Result 598 states and 642 transitions. [2024-11-08 16:54:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-08 16:54:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.090909090909091) internal successors, (272), 88 states have internal predecessors, (272), 0 states have call successors, (0), 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 94 [2024-11-08 16:54:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:49,822 INFO L225 Difference]: With dead ends: 598 [2024-11-08 16:54:49,822 INFO L226 Difference]: Without dead ends: 346 [2024-11-08 16:54:49,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=767, Invalid=21285, Unknown=0, NotChecked=0, Total=22052 [2024-11-08 16:54:49,825 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 223 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 4995 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 5012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:49,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 2446 Invalid, 5012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4995 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-08 16:54:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-08 16:54:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 294. [2024-11-08 16:54:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.0955631399317407) internal successors, (321), 293 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 321 transitions. [2024-11-08 16:54:49,831 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 321 transitions. Word has length 94 [2024-11-08 16:54:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:49,832 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 321 transitions. [2024-11-08 16:54:49,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.090909090909091) internal successors, (272), 88 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 321 transitions. [2024-11-08 16:54:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-08 16:54:49,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:49,833 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:49,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-08 16:54:50,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-08 16:54:50,034 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:50,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1945523893, now seen corresponding path program 15 times [2024-11-08 16:54:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:50,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139162389] [2024-11-08 16:54:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:50,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139162389] [2024-11-08 16:54:50,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139162389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217413507] [2024-11-08 16:54:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:54:50,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:50,986 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:50,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 16:54:51,262 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-08 16:54:51,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:51,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-08 16:54:51,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 128 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:52,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:53,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 16:54:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 128 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:53,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217413507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:53,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:53,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 64 [2024-11-08 16:54:53,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154869592] [2024-11-08 16:54:53,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:53,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-08 16:54:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-08 16:54:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=3643, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 16:54:53,375 INFO L87 Difference]: Start difference. First operand 294 states and 321 transitions. Second operand has 65 states, 64 states have (on average 3.8125) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:54:55,302 INFO L93 Difference]: Finished difference Result 363 states and 392 transitions. [2024-11-08 16:54:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 16:54:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.8125) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 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 98 [2024-11-08 16:54:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:54:55,305 INFO L225 Difference]: With dead ends: 363 [2024-11-08 16:54:55,305 INFO L226 Difference]: Without dead ends: 363 [2024-11-08 16:54:55,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=915, Invalid=6395, Unknown=0, NotChecked=0, Total=7310 [2024-11-08 16:54:55,307 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 315 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:54:55,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 1262 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 16:54:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-08 16:54:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 309. [2024-11-08 16:54:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.0974025974025974) internal successors, (338), 308 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 338 transitions. [2024-11-08 16:54:55,317 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 338 transitions. Word has length 98 [2024-11-08 16:54:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:54:55,317 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 338 transitions. [2024-11-08 16:54:55,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.8125) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:54:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 338 transitions. [2024-11-08 16:54:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-08 16:54:55,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:54:55,319 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:54:55,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-08 16:54:55,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:55,525 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:54:55,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:54:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1946117413, now seen corresponding path program 16 times [2024-11-08 16:54:55,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:54:55,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155511224] [2024-11-08 16:54:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:54:55,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:54:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:54:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:56,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:54:56,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155511224] [2024-11-08 16:54:56,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155511224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:54:56,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374250108] [2024-11-08 16:54:56,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:54:56,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:54:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:54:56,910 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:54:56,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 16:54:57,156 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:54:57,157 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:54:57,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-08 16:54:57,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:54:57,632 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 [2024-11-08 16:54:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:57,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:54:57,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:54:57,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:54:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:54:58,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374250108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:54:58,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:54:58,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 48 [2024-11-08 16:54:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714165903] [2024-11-08 16:54:58,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:54:58,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 16:54:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:54:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 16:54:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 16:54:58,151 INFO L87 Difference]: Start difference. First operand 309 states and 338 transitions. Second operand has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:55:00,154 INFO L93 Difference]: Finished difference Result 552 states and 599 transitions. [2024-11-08 16:55:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 16:55:00,155 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 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 103 [2024-11-08 16:55:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:55:00,156 INFO L225 Difference]: With dead ends: 552 [2024-11-08 16:55:00,156 INFO L226 Difference]: Without dead ends: 330 [2024-11-08 16:55:00,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=284, Invalid=4828, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:55:00,157 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 125 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 2247 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:55:00,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1901 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2247 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 16:55:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-08 16:55:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2024-11-08 16:55:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.09375) internal successors, (350), 320 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 350 transitions. [2024-11-08 16:55:00,165 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 350 transitions. Word has length 103 [2024-11-08 16:55:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:55:00,165 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 350 transitions. [2024-11-08 16:55:00,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 350 transitions. [2024-11-08 16:55:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-08 16:55:00,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:55:00,167 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:55:00,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-08 16:55:00,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:00,368 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:55:00,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:55:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash -434273181, now seen corresponding path program 17 times [2024-11-08 16:55:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:55:00,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419260199] [2024-11-08 16:55:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:55:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:55:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:02,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:55:02,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419260199] [2024-11-08 16:55:02,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419260199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:55:02,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427811845] [2024-11-08 16:55:02,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:55:02,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:55:02,231 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:55:02,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 16:55:02,525 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-08 16:55:02,525 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:55:02,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-08 16:55:02,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:55:02,560 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 [2024-11-08 16:55:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:03,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:55:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427811845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:55:05,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:55:05,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 69 [2024-11-08 16:55:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956877826] [2024-11-08 16:55:05,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:55:05,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-08 16:55:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:55:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-08 16:55:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=4207, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 16:55:05,729 INFO L87 Difference]: Start difference. First operand 321 states and 350 transitions. Second operand has 70 states, 69 states have (on average 3.8115942028985508) internal successors, (263), 70 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:55:08,112 INFO L93 Difference]: Finished difference Result 396 states and 427 transitions. [2024-11-08 16:55:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-08 16:55:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.8115942028985508) internal successors, (263), 70 states have internal predecessors, (263), 0 states have call successors, (0), 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 107 [2024-11-08 16:55:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:55:08,114 INFO L225 Difference]: With dead ends: 396 [2024-11-08 16:55:08,114 INFO L226 Difference]: Without dead ends: 396 [2024-11-08 16:55:08,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=936, Invalid=7620, Unknown=0, NotChecked=0, Total=8556 [2024-11-08 16:55:08,116 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 308 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:55:08,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1261 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 16:55:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-11-08 16:55:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 336. [2024-11-08 16:55:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.0955223880597016) internal successors, (367), 335 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 367 transitions. [2024-11-08 16:55:08,126 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 367 transitions. Word has length 107 [2024-11-08 16:55:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:55:08,126 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 367 transitions. [2024-11-08 16:55:08,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.8115942028985508) internal successors, (263), 70 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 367 transitions. [2024-11-08 16:55:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-08 16:55:08,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:55:08,128 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:55:08,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-08 16:55:08,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-08 16:55:08,329 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:55:08,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:55:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1295567341, now seen corresponding path program 18 times [2024-11-08 16:55:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:55:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949904231] [2024-11-08 16:55:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:55:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:55:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:09,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:55:09,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949904231] [2024-11-08 16:55:09,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949904231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:55:09,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096297934] [2024-11-08 16:55:09,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:55:09,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:09,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:55:09,824 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:55:09,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 16:55:10,250 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-08 16:55:10,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:55:10,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-08 16:55:10,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:55:10,738 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 [2024-11-08 16:55:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:10,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:55:11,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:55:11,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:55:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:11,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096297934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:55:11,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:55:11,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 51 [2024-11-08 16:55:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078287554] [2024-11-08 16:55:11,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:55:11,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 16:55:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:55:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 16:55:11,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:55:11,314 INFO L87 Difference]: Start difference. First operand 336 states and 367 transitions. Second operand has 51 states, 51 states have (on average 3.3137254901960786) internal successors, (169), 51 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:13,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:55:13,889 INFO L93 Difference]: Finished difference Result 600 states and 651 transitions. [2024-11-08 16:55:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-08 16:55:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.3137254901960786) internal successors, (169), 51 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2024-11-08 16:55:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:55:13,891 INFO L225 Difference]: With dead ends: 600 [2024-11-08 16:55:13,891 INFO L226 Difference]: Without dead ends: 357 [2024-11-08 16:55:13,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=304, Invalid=5548, Unknown=0, NotChecked=0, Total=5852 [2024-11-08 16:55:13,893 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 136 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:55:13,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 2437 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 16:55:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-11-08 16:55:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 348. [2024-11-08 16:55:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.0922190201729107) internal successors, (379), 347 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 379 transitions. [2024-11-08 16:55:13,901 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 379 transitions. Word has length 112 [2024-11-08 16:55:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:55:13,901 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 379 transitions. [2024-11-08 16:55:13,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.3137254901960786) internal successors, (169), 51 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 379 transitions. [2024-11-08 16:55:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-08 16:55:13,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:55:13,902 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:55:13,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-08 16:55:14,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-08 16:55:14,103 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:55:14,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:55:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 831920485, now seen corresponding path program 19 times [2024-11-08 16:55:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:55:14,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425978598] [2024-11-08 16:55:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:55:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:55:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 153 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:15,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:55:15,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425978598] [2024-11-08 16:55:15,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425978598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:55:15,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460949180] [2024-11-08 16:55:15,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:55:15,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:15,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:55:15,855 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:55:15,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 16:55:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:16,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-08 16:55:16,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:55:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:16,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:55:18,046 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 [2024-11-08 16:55:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460949180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:55:18,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:55:18,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2024-11-08 16:55:18,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035615090] [2024-11-08 16:55:18,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:55:18,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-08 16:55:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:55:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-08 16:55:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=3500, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 16:55:18,486 INFO L87 Difference]: Start difference. First operand 348 states and 379 transitions. Second operand has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:55:21,230 INFO L93 Difference]: Finished difference Result 429 states and 462 transitions. [2024-11-08 16:55:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-08 16:55:21,230 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2024-11-08 16:55:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:55:21,232 INFO L225 Difference]: With dead ends: 429 [2024-11-08 16:55:21,232 INFO L226 Difference]: Without dead ends: 429 [2024-11-08 16:55:21,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 187 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=749, Invalid=6907, Unknown=0, NotChecked=0, Total=7656 [2024-11-08 16:55:21,233 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 185 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:55:21,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1860 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 16:55:21,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2024-11-08 16:55:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 363. [2024-11-08 16:55:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.0939226519337018) internal successors, (396), 362 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 396 transitions. [2024-11-08 16:55:21,241 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 396 transitions. Word has length 116 [2024-11-08 16:55:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:55:21,241 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 396 transitions. [2024-11-08 16:55:21,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 396 transitions. [2024-11-08 16:55:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-08 16:55:21,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:55:21,243 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:55:21,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-08 16:55:21,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-08 16:55:21,443 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:55:21,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:55:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1304492501, now seen corresponding path program 20 times [2024-11-08 16:55:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:55:21,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002569109] [2024-11-08 16:55:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:55:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:55:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:55:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002569109] [2024-11-08 16:55:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002569109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:55:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785362581] [2024-11-08 16:55:23,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:55:23,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:55:23,253 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:55:23,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 16:55:23,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:55:23,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:55:23,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-08 16:55:23,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:55:24,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:55:24,659 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 [2024-11-08 16:55:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:55:24,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:55:24,937 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 15 treesize of output 10 [2024-11-08 16:55:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:26,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:55:27,749 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 19 treesize of output 17 [2024-11-08 16:55:27,754 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 28 treesize of output 24 [2024-11-08 16:55:27,942 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 [2024-11-08 16:55:27,946 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 [2024-11-08 16:55:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785362581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:55:30,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:55:30,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 38] total 106 [2024-11-08 16:55:30,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058896144] [2024-11-08 16:55:30,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:55:30,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-08 16:55:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:55:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-08 16:55:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=10790, Unknown=0, NotChecked=0, Total=11130 [2024-11-08 16:55:30,324 INFO L87 Difference]: Start difference. First operand 363 states and 396 transitions. Second operand has 106 states, 106 states have (on average 3.330188679245283) internal successors, (353), 106 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:55:40,548 INFO L93 Difference]: Finished difference Result 769 states and 825 transitions. [2024-11-08 16:55:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-08 16:55:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.330188679245283) internal successors, (353), 106 states have internal predecessors, (353), 0 states have call successors, (0), 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 121 [2024-11-08 16:55:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:55:40,550 INFO L225 Difference]: With dead ends: 769 [2024-11-08 16:55:40,550 INFO L226 Difference]: Without dead ends: 439 [2024-11-08 16:55:40,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8760 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=953, Invalid=31989, Unknown=0, NotChecked=0, Total=32942 [2024-11-08 16:55:40,554 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 264 mSDsluCounter, 3539 mSDsCounter, 0 mSdLazyCounter, 7771 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 3606 SdHoareTripleChecker+Invalid, 7794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:55:40,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 3606 Invalid, 7794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 7771 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-08 16:55:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-11-08 16:55:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 375. [2024-11-08 16:55:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0909090909090908) internal successors, (408), 374 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 408 transitions. [2024-11-08 16:55:40,563 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 408 transitions. Word has length 121 [2024-11-08 16:55:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:55:40,563 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 408 transitions. [2024-11-08 16:55:40,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.330188679245283) internal successors, (353), 106 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 408 transitions. [2024-11-08 16:55:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-08 16:55:40,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:55:40,566 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:55:40,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-08 16:55:40,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-08 16:55:40,767 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:55:40,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:55:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1831363149, now seen corresponding path program 21 times [2024-11-08 16:55:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:55:40,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917905895] [2024-11-08 16:55:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:55:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:55:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:42,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:55:42,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917905895] [2024-11-08 16:55:42,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917905895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:55:42,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145879823] [2024-11-08 16:55:42,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:55:42,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:42,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:55:42,739 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:55:42,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-08 16:55:43,234 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-08 16:55:43,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:55:43,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-08 16:55:43,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:55:43,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:55:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 242 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:44,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:55:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 242 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:47,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145879823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:55:47,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:55:47,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 92 [2024-11-08 16:55:47,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652389319] [2024-11-08 16:55:47,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:55:47,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-08 16:55:47,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:55:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-08 16:55:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1063, Invalid=7493, Unknown=0, NotChecked=0, Total=8556 [2024-11-08 16:55:47,459 INFO L87 Difference]: Start difference. First operand 375 states and 408 transitions. Second operand has 93 states, 92 states have (on average 3.967391304347826) internal successors, (365), 93 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:55:50,448 INFO L93 Difference]: Finished difference Result 462 states and 497 transitions. [2024-11-08 16:55:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 16:55:50,449 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.967391304347826) internal successors, (365), 93 states have internal predecessors, (365), 0 states have call successors, (0), 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 125 [2024-11-08 16:55:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:55:50,450 INFO L225 Difference]: With dead ends: 462 [2024-11-08 16:55:50,451 INFO L226 Difference]: Without dead ends: 462 [2024-11-08 16:55:50,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4517 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1672, Invalid=12608, Unknown=0, NotChecked=0, Total=14280 [2024-11-08 16:55:50,453 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 349 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:55:50,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1566 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 16:55:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2024-11-08 16:55:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 390. [2024-11-08 16:55:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0925449871465296) internal successors, (425), 389 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 425 transitions. [2024-11-08 16:55:50,464 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 425 transitions. Word has length 125 [2024-11-08 16:55:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:55:50,465 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 425 transitions. [2024-11-08 16:55:50,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.967391304347826) internal successors, (365), 93 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 425 transitions. [2024-11-08 16:55:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-08 16:55:50,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:55:50,467 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:55:50,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-08 16:55:50,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-08 16:55:50,671 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:55:50,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:55:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1234566499, now seen corresponding path program 22 times [2024-11-08 16:55:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:55:50,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354345119] [2024-11-08 16:55:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:55:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:55:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:55:52,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354345119] [2024-11-08 16:55:52,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354345119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:55:52,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830652331] [2024-11-08 16:55:52,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:55:52,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:55:52,369 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:55:52,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-08 16:55:52,675 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:55:52,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:55:52,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-08 16:55:52,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:55:53,378 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 [2024-11-08 16:55:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:53,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:55:53,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:55:53,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:55:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:53,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830652331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:55:53,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:55:53,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 57 [2024-11-08 16:55:53,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443029860] [2024-11-08 16:55:53,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:55:53,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-08 16:55:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:55:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-08 16:55:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3032, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 16:55:53,973 INFO L87 Difference]: Start difference. First operand 390 states and 425 transitions. Second operand has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:55:57,178 INFO L93 Difference]: Finished difference Result 696 states and 755 transitions. [2024-11-08 16:55:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-08 16:55:57,179 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 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 130 [2024-11-08 16:55:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:55:57,180 INFO L225 Difference]: With dead ends: 696 [2024-11-08 16:55:57,180 INFO L226 Difference]: Without dead ends: 411 [2024-11-08 16:55:57,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=344, Invalid=7138, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 16:55:57,181 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 155 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 3826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:55:57,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 3291 Invalid, 3826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 16:55:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-08 16:55:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 402. [2024-11-08 16:55:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.0897755610972568) internal successors, (437), 401 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 437 transitions. [2024-11-08 16:55:57,190 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 437 transitions. Word has length 130 [2024-11-08 16:55:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:55:57,190 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 437 transitions. [2024-11-08 16:55:57,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:55:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 437 transitions. [2024-11-08 16:55:57,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-08 16:55:57,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:55:57,192 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:55:57,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-08 16:55:57,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-08 16:55:57,393 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:55:57,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:55:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 428827669, now seen corresponding path program 23 times [2024-11-08 16:55:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:55:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185352330] [2024-11-08 16:55:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:55:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:55:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:55:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 231 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:55:59,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:55:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185352330] [2024-11-08 16:55:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185352330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:55:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080144516] [2024-11-08 16:55:59,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:55:59,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:55:59,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:55:59,552 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:55:59,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-08 16:55:59,961 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-08 16:55:59,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:55:59,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-08 16:55:59,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:55:59,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:56:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 276 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:01,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:56:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 276 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:04,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080144516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:56:04,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:56:04,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 84 [2024-11-08 16:56:04,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924046601] [2024-11-08 16:56:04,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:56:04,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-08 16:56:04,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:56:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-08 16:56:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=6214, Unknown=0, NotChecked=0, Total=7140 [2024-11-08 16:56:04,100 INFO L87 Difference]: Start difference. First operand 402 states and 437 transitions. Second operand has 85 states, 84 states have (on average 3.9166666666666665) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:56:07,661 INFO L93 Difference]: Finished difference Result 495 states and 532 transitions. [2024-11-08 16:56:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-08 16:56:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 3.9166666666666665) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 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 134 [2024-11-08 16:56:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:56:07,663 INFO L225 Difference]: With dead ends: 495 [2024-11-08 16:56:07,663 INFO L226 Difference]: Without dead ends: 495 [2024-11-08 16:56:07,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1365, Invalid=11517, Unknown=0, NotChecked=0, Total=12882 [2024-11-08 16:56:07,665 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 323 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:56:07,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1997 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3087 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 16:56:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2024-11-08 16:56:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 417. [2024-11-08 16:56:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.0913461538461537) internal successors, (454), 416 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 454 transitions. [2024-11-08 16:56:07,674 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 454 transitions. Word has length 134 [2024-11-08 16:56:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:56:07,675 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 454 transitions. [2024-11-08 16:56:07,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 3.9166666666666665) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 454 transitions. [2024-11-08 16:56:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-08 16:56:07,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:07,677 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:07,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-08 16:56:07,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-08 16:56:07,878 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:56:07,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1356392827, now seen corresponding path program 24 times [2024-11-08 16:56:07,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:56:07,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236282098] [2024-11-08 16:56:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:07,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:56:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:56:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236282098] [2024-11-08 16:56:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236282098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:56:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572731353] [2024-11-08 16:56:09,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:56:09,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:09,841 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:56:09,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-08 16:56:10,746 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-08 16:56:10,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:56:10,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-08 16:56:10,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:56:11,465 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 [2024-11-08 16:56:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:11,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:56:11,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:56:11,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:56:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572731353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:56:12,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:56:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 60 [2024-11-08 16:56:12,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353261962] [2024-11-08 16:56:12,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:56:12,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-08 16:56:12,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:56:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-08 16:56:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3372, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 16:56:12,180 INFO L87 Difference]: Start difference. First operand 417 states and 454 transitions. Second operand has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:16,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:56:16,017 INFO L93 Difference]: Finished difference Result 744 states and 807 transitions. [2024-11-08 16:56:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 16:56:16,017 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 0 states have call successors, (0), 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 139 [2024-11-08 16:56:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:56:16,019 INFO L225 Difference]: With dead ends: 744 [2024-11-08 16:56:16,019 INFO L226 Difference]: Without dead ends: 438 [2024-11-08 16:56:16,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=364, Invalid=8008, Unknown=0, NotChecked=0, Total=8372 [2024-11-08 16:56:16,021 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 254 mSDsluCounter, 3947 mSDsCounter, 0 mSdLazyCounter, 4698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 4042 SdHoareTripleChecker+Invalid, 4712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:56:16,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 4042 Invalid, 4712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4698 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-08 16:56:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-08 16:56:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 429. [2024-11-08 16:56:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.088785046728972) internal successors, (466), 428 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 466 transitions. [2024-11-08 16:56:16,029 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 466 transitions. Word has length 139 [2024-11-08 16:56:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:56:16,029 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 466 transitions. [2024-11-08 16:56:16,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 466 transitions. [2024-11-08 16:56:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-08 16:56:16,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:16,030 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:16,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-08 16:56:16,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:16,231 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:56:16,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash -39997693, now seen corresponding path program 25 times [2024-11-08 16:56:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:56:16,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910446422] [2024-11-08 16:56:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:16,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:56:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 276 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:18,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:56:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910446422] [2024-11-08 16:56:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910446422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:56:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110221401] [2024-11-08 16:56:18,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:56:18,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:18,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:18,598 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:56:18,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-08 16:56:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:18,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-08 16:56:18,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:56:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:20,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:56:21,656 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 [2024-11-08 16:56:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:22,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110221401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:56:22,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:56:22,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 74 [2024-11-08 16:56:22,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669466741] [2024-11-08 16:56:22,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:56:22,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-08 16:56:22,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:56:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-08 16:56:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=4964, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 16:56:22,304 INFO L87 Difference]: Start difference. First operand 429 states and 466 transitions. Second operand has 75 states, 74 states have (on average 3.9054054054054053) internal successors, (289), 75 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:56:25,984 INFO L93 Difference]: Finished difference Result 528 states and 567 transitions. [2024-11-08 16:56:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-08 16:56:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.9054054054054053) internal successors, (289), 75 states have internal predecessors, (289), 0 states have call successors, (0), 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 143 [2024-11-08 16:56:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:56:25,987 INFO L225 Difference]: With dead ends: 528 [2024-11-08 16:56:25,987 INFO L226 Difference]: Without dead ends: 528 [2024-11-08 16:56:25,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 232 SyntacticMatches, 15 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4159 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1058, Invalid=10072, Unknown=0, NotChecked=0, Total=11130 [2024-11-08 16:56:25,989 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 338 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 3513 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:56:25,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 2050 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3513 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-08 16:56:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2024-11-08 16:56:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 444. [2024-11-08 16:56:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.090293453724605) internal successors, (483), 443 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 483 transitions. [2024-11-08 16:56:25,999 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 483 transitions. Word has length 143 [2024-11-08 16:56:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:56:26,000 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 483 transitions. [2024-11-08 16:56:26,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.9054054054054053) internal successors, (289), 75 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 483 transitions. [2024-11-08 16:56:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-08 16:56:26,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:26,002 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:26,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-08 16:56:26,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:26,203 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:56:26,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:26,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1572191411, now seen corresponding path program 26 times [2024-11-08 16:56:26,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:56:26,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133727401] [2024-11-08 16:56:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:26,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:56:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 44 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:28,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:56:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133727401] [2024-11-08 16:56:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133727401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:56:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124882626] [2024-11-08 16:56:28,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:56:28,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:28,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:28,380 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:56:28,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-08 16:56:28,688 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:56:28,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:56:28,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 166 conjuncts are in the unsatisfiable core [2024-11-08 16:56:28,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:56:29,462 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 [2024-11-08 16:56:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 44 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:29,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:56:29,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:56:29,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:56:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 44 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124882626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:56:30,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:56:30,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 63 [2024-11-08 16:56:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415401266] [2024-11-08 16:56:30,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:56:30,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-08 16:56:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:56:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-08 16:56:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3730, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 16:56:30,159 INFO L87 Difference]: Start difference. First operand 444 states and 483 transitions. Second operand has 63 states, 63 states have (on average 3.5238095238095237) internal successors, (222), 63 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:56:34,192 INFO L93 Difference]: Finished difference Result 792 states and 859 transitions. [2024-11-08 16:56:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-08 16:56:34,193 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.5238095238095237) internal successors, (222), 63 states have internal predecessors, (222), 0 states have call successors, (0), 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 148 [2024-11-08 16:56:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:56:34,194 INFO L225 Difference]: With dead ends: 792 [2024-11-08 16:56:34,194 INFO L226 Difference]: Without dead ends: 465 [2024-11-08 16:56:34,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=384, Invalid=8928, Unknown=0, NotChecked=0, Total=9312 [2024-11-08 16:56:34,196 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 268 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 3661 SdHoareTripleChecker+Invalid, 4814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:56:34,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 3661 Invalid, 4814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-08 16:56:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-08 16:56:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 456. [2024-11-08 16:56:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.0879120879120878) internal successors, (495), 455 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 495 transitions. [2024-11-08 16:56:34,216 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 495 transitions. Word has length 148 [2024-11-08 16:56:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:56:34,216 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 495 transitions. [2024-11-08 16:56:34,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.5238095238095237) internal successors, (222), 63 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 495 transitions. [2024-11-08 16:56:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-08 16:56:34,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:34,218 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:34,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-08 16:56:34,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-08 16:56:34,420 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:56:34,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1561802437, now seen corresponding path program 27 times [2024-11-08 16:56:34,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:56:34,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681502061] [2024-11-08 16:56:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:56:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 325 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:56:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681502061] [2024-11-08 16:56:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681502061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:56:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148593062] [2024-11-08 16:56:36,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:56:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:36,905 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:56:36,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-08 16:56:37,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-08 16:56:37,936 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:56:37,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-08 16:56:37,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:56:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 392 proven. 598 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:39,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:56:40,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-08 16:56:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 392 proven. 598 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:42,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148593062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:56:42,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:56:42,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 94 [2024-11-08 16:56:42,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016635932] [2024-11-08 16:56:42,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:56:42,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-08 16:56:42,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:56:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-08 16:56:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=7799, Unknown=0, NotChecked=0, Total=8930 [2024-11-08 16:56:42,354 INFO L87 Difference]: Start difference. First operand 456 states and 495 transitions. Second operand has 95 states, 94 states have (on average 3.9680851063829787) internal successors, (373), 95 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:56:46,702 INFO L93 Difference]: Finished difference Result 561 states and 602 transitions. [2024-11-08 16:56:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-08 16:56:46,703 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 3.9680851063829787) internal successors, (373), 95 states have internal predecessors, (373), 0 states have call successors, (0), 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 152 [2024-11-08 16:56:46,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:56:46,704 INFO L225 Difference]: With dead ends: 561 [2024-11-08 16:56:46,704 INFO L226 Difference]: Without dead ends: 561 [2024-11-08 16:56:46,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5166 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1664, Invalid=14592, Unknown=0, NotChecked=0, Total=16256 [2024-11-08 16:56:46,706 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 448 mSDsluCounter, 2179 mSDsCounter, 0 mSdLazyCounter, 3914 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 3914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:56:46,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2267 Invalid, 3914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3914 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-08 16:56:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-11-08 16:56:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 471. [2024-11-08 16:56:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.0893617021276596) internal successors, (512), 470 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 512 transitions. [2024-11-08 16:56:46,713 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 512 transitions. Word has length 152 [2024-11-08 16:56:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:56:46,713 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 512 transitions. [2024-11-08 16:56:46,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 3.9680851063829787) internal successors, (373), 95 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 512 transitions. [2024-11-08 16:56:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-08 16:56:46,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:46,716 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:46,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-08 16:56:46,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-08 16:56:46,916 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:56:46,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1346812725, now seen corresponding path program 28 times [2024-11-08 16:56:46,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:56:46,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133179434] [2024-11-08 16:56:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:46,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:56:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:56:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133179434] [2024-11-08 16:56:49,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133179434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:56:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948892902] [2024-11-08 16:56:49,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:56:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:49,816 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:56:49,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-08 16:56:50,185 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:56:50,185 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:56:50,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-11-08 16:56:50,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:56:51,040 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 [2024-11-08 16:56:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:51,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:56:51,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:56:51,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:56:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:51,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948892902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:56:51,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:56:51,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 66 [2024-11-08 16:56:51,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028778326] [2024-11-08 16:56:51,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:56:51,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-08 16:56:51,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:56:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-08 16:56:51,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=4106, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 16:56:51,779 INFO L87 Difference]: Start difference. First operand 471 states and 512 transitions. Second operand has 66 states, 66 states have (on average 3.5606060606060606) internal successors, (235), 66 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:56:56,377 INFO L93 Difference]: Finished difference Result 840 states and 911 transitions. [2024-11-08 16:56:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-08 16:56:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.5606060606060606) internal successors, (235), 66 states have internal predecessors, (235), 0 states have call successors, (0), 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 157 [2024-11-08 16:56:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:56:56,379 INFO L225 Difference]: With dead ends: 840 [2024-11-08 16:56:56,379 INFO L226 Difference]: Without dead ends: 492 [2024-11-08 16:56:56,381 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=404, Invalid=9898, Unknown=0, NotChecked=0, Total=10302 [2024-11-08 16:56:56,381 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 191 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 5672 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 4910 SdHoareTripleChecker+Invalid, 5687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:56:56,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 4910 Invalid, 5687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 5672 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-08 16:56:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-08 16:56:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 483. [2024-11-08 16:56:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.0871369294605808) internal successors, (524), 482 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 524 transitions. [2024-11-08 16:56:56,390 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 524 transitions. Word has length 157 [2024-11-08 16:56:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:56:56,391 INFO L471 AbstractCegarLoop]: Abstraction has 483 states and 524 transitions. [2024-11-08 16:56:56,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.5606060606060606) internal successors, (235), 66 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:56:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 524 transitions. [2024-11-08 16:56:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-08 16:56:56,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:56,393 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:56,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-08 16:56:56,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-08 16:56:56,594 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:56:56,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:56,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1824868269, now seen corresponding path program 29 times [2024-11-08 16:56:56,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:56:56,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123325267] [2024-11-08 16:56:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:56:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 378 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:58,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:56:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123325267] [2024-11-08 16:56:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123325267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:56:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607586857] [2024-11-08 16:56:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:56:58,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:56:58,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:58,799 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:56:58,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-08 16:56:59,364 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-08 16:56:59,364 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:56:59,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-08 16:56:59,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:56:59,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:57:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 435 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:00,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:57:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 435 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607586857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:57:04,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:57:04,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 99 [2024-11-08 16:57:04,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015077789] [2024-11-08 16:57:04,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:57:04,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-08 16:57:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:57:04,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-08 16:57:04,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=8607, Unknown=0, NotChecked=0, Total=9900 [2024-11-08 16:57:04,585 INFO L87 Difference]: Start difference. First operand 483 states and 524 transitions. Second operand has 100 states, 99 states have (on average 3.98989898989899) internal successors, (395), 100 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:57:09,431 INFO L93 Difference]: Finished difference Result 594 states and 637 transitions. [2024-11-08 16:57:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-08 16:57:09,431 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 3.98989898989899) internal successors, (395), 100 states have internal predecessors, (395), 0 states have call successors, (0), 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 161 [2024-11-08 16:57:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:57:09,433 INFO L225 Difference]: With dead ends: 594 [2024-11-08 16:57:09,433 INFO L226 Difference]: Without dead ends: 594 [2024-11-08 16:57:09,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5869 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1876, Invalid=16214, Unknown=0, NotChecked=0, Total=18090 [2024-11-08 16:57:09,435 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 444 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 2632 SdHoareTripleChecker+Invalid, 4280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:57:09,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 2632 Invalid, 4280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-08 16:57:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2024-11-08 16:57:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 498. [2024-11-08 16:57:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.0885311871227363) internal successors, (541), 497 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 541 transitions. [2024-11-08 16:57:09,442 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 541 transitions. Word has length 161 [2024-11-08 16:57:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:57:09,443 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 541 transitions. [2024-11-08 16:57:09,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 3.98989898989899) internal successors, (395), 100 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 541 transitions. [2024-11-08 16:57:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-08 16:57:09,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:57:09,445 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:57:09,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-08 16:57:09,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:57:09,645 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:57:09,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:57:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash -353465347, now seen corresponding path program 30 times [2024-11-08 16:57:09,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:57:09,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731874259] [2024-11-08 16:57:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:57:09,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:57:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:57:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 50 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:12,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:57:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731874259] [2024-11-08 16:57:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731874259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:57:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817351785] [2024-11-08 16:57:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:57:12,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:57:12,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:57:12,136 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:57:12,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-08 16:57:13,503 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-08 16:57:13,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:57:13,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-08 16:57:13,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:57:14,447 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 [2024-11-08 16:57:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 50 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:14,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:57:14,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:57:14,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:57:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 50 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:15,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817351785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:57:15,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:57:15,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 69 [2024-11-08 16:57:15,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409980231] [2024-11-08 16:57:15,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:57:15,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-08 16:57:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:57:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-08 16:57:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4500, Unknown=0, NotChecked=0, Total=4692 [2024-11-08 16:57:15,218 INFO L87 Difference]: Start difference. First operand 498 states and 541 transitions. Second operand has 69 states, 69 states have (on average 3.579710144927536) internal successors, (247), 69 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:57:20,328 INFO L93 Difference]: Finished difference Result 888 states and 963 transitions. [2024-11-08 16:57:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-08 16:57:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.579710144927536) internal successors, (247), 69 states have internal predecessors, (247), 0 states have call successors, (0), 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 166 [2024-11-08 16:57:20,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:57:20,330 INFO L225 Difference]: With dead ends: 888 [2024-11-08 16:57:20,330 INFO L226 Difference]: Without dead ends: 519 [2024-11-08 16:57:20,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=424, Invalid=10918, Unknown=0, NotChecked=0, Total=11342 [2024-11-08 16:57:20,333 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 205 mSDsluCounter, 5378 mSDsCounter, 0 mSdLazyCounter, 6364 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 5491 SdHoareTripleChecker+Invalid, 6381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:57:20,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 5491 Invalid, 6381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6364 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-08 16:57:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-08 16:57:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 510. [2024-11-08 16:57:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.0864440078585462) internal successors, (553), 509 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 553 transitions. [2024-11-08 16:57:20,341 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 553 transitions. Word has length 166 [2024-11-08 16:57:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:57:20,342 INFO L471 AbstractCegarLoop]: Abstraction has 510 states and 553 transitions. [2024-11-08 16:57:20,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.579710144927536) internal successors, (247), 69 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 553 transitions. [2024-11-08 16:57:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-08 16:57:20,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:57:20,344 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:57:20,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-08 16:57:20,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-08 16:57:20,545 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:57:20,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:57:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash 761434485, now seen corresponding path program 31 times [2024-11-08 16:57:20,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:57:20,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378209776] [2024-11-08 16:57:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:57:20,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:57:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:57:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 435 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:23,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:57:23,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378209776] [2024-11-08 16:57:23,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378209776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:57:23,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97884302] [2024-11-08 16:57:23,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:57:23,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:57:23,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:57:23,460 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:57:23,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-08 16:57:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:57:23,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-11-08 16:57:23,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:57:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 496 proven. 779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:25,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:57:27,286 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 [2024-11-08 16:57:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 496 proven. 779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97884302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:57:28,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:57:28,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 86 [2024-11-08 16:57:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309648291] [2024-11-08 16:57:28,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:57:28,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-08 16:57:28,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:57:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-08 16:57:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=802, Invalid=6680, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 16:57:28,174 INFO L87 Difference]: Start difference. First operand 510 states and 553 transitions. Second operand has 87 states, 86 states have (on average 3.988372093023256) internal successors, (343), 87 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:57:33,298 INFO L93 Difference]: Finished difference Result 627 states and 672 transitions. [2024-11-08 16:57:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-08 16:57:33,299 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.988372093023256) internal successors, (343), 87 states have internal predecessors, (343), 0 states have call successors, (0), 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 170 [2024-11-08 16:57:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:57:33,300 INFO L225 Difference]: With dead ends: 627 [2024-11-08 16:57:33,301 INFO L226 Difference]: Without dead ends: 627 [2024-11-08 16:57:33,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 277 SyntacticMatches, 18 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5854 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1421, Invalid=13831, Unknown=0, NotChecked=0, Total=15252 [2024-11-08 16:57:33,302 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 368 mSDsluCounter, 3003 mSDsCounter, 0 mSdLazyCounter, 5088 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:57:33,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 3101 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5088 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-08 16:57:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2024-11-08 16:57:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 525. [2024-11-08 16:57:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0877862595419847) internal successors, (570), 524 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 570 transitions. [2024-11-08 16:57:33,308 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 570 transitions. Word has length 170 [2024-11-08 16:57:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:57:33,309 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 570 transitions. [2024-11-08 16:57:33,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.988372093023256) internal successors, (343), 87 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 570 transitions. [2024-11-08 16:57:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-11-08 16:57:33,311 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:57:33,311 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:57:33,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-08 16:57:33,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-08 16:57:33,512 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:57:33,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:57:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash 382408731, now seen corresponding path program 32 times [2024-11-08 16:57:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:57:33,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588844449] [2024-11-08 16:57:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:57:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:57:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:57:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:36,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:57:36,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588844449] [2024-11-08 16:57:36,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588844449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:57:36,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353849634] [2024-11-08 16:57:36,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:57:36,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:57:36,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:57:36,388 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:57:36,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-08 16:57:36,754 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:57:36,754 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:57:36,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-08 16:57:36,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:57:38,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:57:38,658 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 [2024-11-08 16:57:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:39,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:57:39,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:57:39,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:57:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:41,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353849634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:57:41,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:57:41,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 50, 45] total 97 [2024-11-08 16:57:41,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265156418] [2024-11-08 16:57:41,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:57:41,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-08 16:57:41,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:57:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-08 16:57:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=8995, Unknown=0, NotChecked=0, Total=9312 [2024-11-08 16:57:41,062 INFO L87 Difference]: Start difference. First operand 525 states and 570 transitions. Second operand has 97 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:57:51,428 INFO L93 Difference]: Finished difference Result 1022 states and 1103 transitions. [2024-11-08 16:57:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-11-08 16:57:51,428 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 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 175 [2024-11-08 16:57:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:57:51,430 INFO L225 Difference]: With dead ends: 1022 [2024-11-08 16:57:51,430 INFO L226 Difference]: Without dead ends: 625 [2024-11-08 16:57:51,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7464 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1023, Invalid=31197, Unknown=0, NotChecked=0, Total=32220 [2024-11-08 16:57:51,432 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 291 mSDsluCounter, 6525 mSDsCounter, 0 mSdLazyCounter, 8954 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 6639 SdHoareTripleChecker+Invalid, 8988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 8954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:57:51,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 6639 Invalid, 8988 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 8954 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-08 16:57:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2024-11-08 16:57:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 537. [2024-11-08 16:57:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.085820895522388) internal successors, (582), 536 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 582 transitions. [2024-11-08 16:57:51,439 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 582 transitions. Word has length 175 [2024-11-08 16:57:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:57:51,440 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 582 transitions. [2024-11-08 16:57:51,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:57:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 582 transitions. [2024-11-08 16:57:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-08 16:57:51,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:57:51,442 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:57:51,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-08 16:57:51,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-08 16:57:51,643 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:57:51,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:57:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1215936931, now seen corresponding path program 33 times [2024-11-08 16:57:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:57:51,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774514218] [2024-11-08 16:57:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:57:51,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:57:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:57:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 496 proven. 935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:54,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:57:54,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774514218] [2024-11-08 16:57:54,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774514218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:57:54,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268893462] [2024-11-08 16:57:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:57:54,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:57:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:57:54,708 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:57:54,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-08 16:57:56,131 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-08 16:57:56,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:57:56,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-08 16:57:56,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:57:56,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:57:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 578 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:57:58,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:58:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 578 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:03,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268893462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:58:03,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:58:03,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 128 [2024-11-08 16:58:03,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079352304] [2024-11-08 16:58:03,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:58:03,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-08 16:58:03,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:58:03,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-08 16:58:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2158, Invalid=14354, Unknown=0, NotChecked=0, Total=16512 [2024-11-08 16:58:03,239 INFO L87 Difference]: Start difference. First operand 537 states and 582 transitions. Second operand has 129 states, 128 states have (on average 4.1171875) internal successors, (527), 129 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:58:08,472 INFO L93 Difference]: Finished difference Result 660 states and 707 transitions. [2024-11-08 16:58:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-08 16:58:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 4.1171875) internal successors, (527), 129 states have internal predecessors, (527), 0 states have call successors, (0), 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 179 [2024-11-08 16:58:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:58:08,474 INFO L225 Difference]: With dead ends: 660 [2024-11-08 16:58:08,474 INFO L226 Difference]: Without dead ends: 660 [2024-11-08 16:58:08,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9284 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3277, Invalid=24779, Unknown=0, NotChecked=0, Total=28056 [2024-11-08 16:58:08,476 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 443 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 3833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:58:08,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 2341 Invalid, 3833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-08 16:58:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2024-11-08 16:58:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 552. [2024-11-08 16:58:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.087114337568058) internal successors, (599), 551 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 599 transitions. [2024-11-08 16:58:08,483 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 599 transitions. Word has length 179 [2024-11-08 16:58:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:58:08,483 INFO L471 AbstractCegarLoop]: Abstraction has 552 states and 599 transitions. [2024-11-08 16:58:08,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 4.1171875) internal successors, (527), 129 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 599 transitions. [2024-11-08 16:58:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-08 16:58:08,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:58:08,485 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:58:08,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-08 16:58:08,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-08 16:58:08,686 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:58:08,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:58:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash -496247635, now seen corresponding path program 34 times [2024-11-08 16:58:08,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:58:08,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977148427] [2024-11-08 16:58:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:58:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:58:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:58:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 56 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:11,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:58:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977148427] [2024-11-08 16:58:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977148427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:58:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191799271] [2024-11-08 16:58:11,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:58:11,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:58:11,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:58:11,744 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:58:11,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-08 16:58:12,142 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:58:12,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:58:12,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 232 conjuncts are in the unsatisfiable core [2024-11-08 16:58:12,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:58:13,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 16:58:13,845 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 [2024-11-08 16:58:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:16,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:58:18,987 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 19 treesize of output 17 [2024-11-08 16:58:18,990 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 28 treesize of output 24 [2024-11-08 16:58:19,000 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 [2024-11-08 16:58:19,004 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 14 treesize of output 12 [2024-11-08 16:58:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191799271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:58:19,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:58:19,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 51] total 126 [2024-11-08 16:58:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830680243] [2024-11-08 16:58:19,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:58:19,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-11-08 16:58:19,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:58:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-11-08 16:58:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=15400, Unknown=0, NotChecked=0, Total=15750 [2024-11-08 16:58:19,531 INFO L87 Difference]: Start difference. First operand 552 states and 599 transitions. Second operand has 126 states, 126 states have (on average 3.7222222222222223) internal successors, (469), 126 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:58:36,155 INFO L93 Difference]: Finished difference Result 1168 states and 1252 transitions. [2024-11-08 16:58:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-11-08 16:58:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.7222222222222223) internal successors, (469), 126 states have internal predecessors, (469), 0 states have call successors, (0), 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 184 [2024-11-08 16:58:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:58:36,157 INFO L225 Difference]: With dead ends: 1168 [2024-11-08 16:58:36,157 INFO L226 Difference]: Without dead ends: 656 [2024-11-08 16:58:36,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15824 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1139, Invalid=54793, Unknown=0, NotChecked=0, Total=55932 [2024-11-08 16:58:36,161 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 383 mSDsluCounter, 7020 mSDsCounter, 0 mSdLazyCounter, 15312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 7122 SdHoareTripleChecker+Invalid, 15349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 15312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:58:36,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 7122 Invalid, 15349 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 15312 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2024-11-08 16:58:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2024-11-08 16:58:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 564. [2024-11-08 16:58:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.0852575488454708) internal successors, (611), 563 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 611 transitions. [2024-11-08 16:58:36,170 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 611 transitions. Word has length 184 [2024-11-08 16:58:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:58:36,171 INFO L471 AbstractCegarLoop]: Abstraction has 564 states and 611 transitions. [2024-11-08 16:58:36,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.7222222222222223) internal successors, (469), 126 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 611 transitions. [2024-11-08 16:58:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-08 16:58:36,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:58:36,173 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:58:36,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-08 16:58:36,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:58:36,374 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:58:36,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:58:36,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1415154651, now seen corresponding path program 35 times [2024-11-08 16:58:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:58:36,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351747228] [2024-11-08 16:58:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:58:36,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:58:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:58:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 561 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:39,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:58:39,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351747228] [2024-11-08 16:58:39,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351747228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:58:39,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11936899] [2024-11-08 16:58:39,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:58:39,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:58:39,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:58:39,207 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:58:39,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-08 16:58:39,936 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-08 16:58:39,937 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:58:39,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-11-08 16:58:39,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:58:39,958 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 [2024-11-08 16:58:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:41,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:58:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:46,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11936899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:58:46,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:58:46,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 114 [2024-11-08 16:58:46,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592743099] [2024-11-08 16:58:46,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:58:46,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-11-08 16:58:46,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:58:46,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-11-08 16:58:46,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=11387, Unknown=0, NotChecked=0, Total=13110 [2024-11-08 16:58:46,680 INFO L87 Difference]: Start difference. First operand 564 states and 611 transitions. Second operand has 115 states, 114 states have (on average 4.043859649122807) internal successors, (461), 115 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:58:53,154 INFO L93 Difference]: Finished difference Result 693 states and 742 transitions. [2024-11-08 16:58:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-08 16:58:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 4.043859649122807) internal successors, (461), 115 states have internal predecessors, (461), 0 states have call successors, (0), 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 188 [2024-11-08 16:58:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:58:53,157 INFO L225 Difference]: With dead ends: 693 [2024-11-08 16:58:53,157 INFO L226 Difference]: Without dead ends: 693 [2024-11-08 16:58:53,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7917 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2468, Invalid=21712, Unknown=0, NotChecked=0, Total=24180 [2024-11-08 16:58:53,159 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 700 mSDsluCounter, 3582 mSDsCounter, 0 mSdLazyCounter, 5696 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 3692 SdHoareTripleChecker+Invalid, 5696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:58:53,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 3692 Invalid, 5696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5696 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-08 16:58:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2024-11-08 16:58:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 579. [2024-11-08 16:58:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.0865051903114187) internal successors, (628), 578 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 628 transitions. [2024-11-08 16:58:53,168 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 628 transitions. Word has length 188 [2024-11-08 16:58:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:58:53,168 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 628 transitions. [2024-11-08 16:58:53,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 4.043859649122807) internal successors, (461), 115 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:58:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 628 transitions. [2024-11-08 16:58:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-08 16:58:53,170 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:58:53,170 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:58:53,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-08 16:58:53,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-08 16:58:53,371 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:58:53,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:58:53,371 INFO L85 PathProgramCache]: Analyzing trace with hash -570858645, now seen corresponding path program 36 times [2024-11-08 16:58:53,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:58:53,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819958532] [2024-11-08 16:58:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:58:53,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:58:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:58:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:58:56,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:58:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819958532] [2024-11-08 16:58:56,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819958532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:58:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282499222] [2024-11-08 16:58:56,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:58:56,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:58:56,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:58:56,781 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:58:56,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-08 16:58:58,352 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2024-11-08 16:58:58,352 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:58:58,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 216 conjuncts are in the unsatisfiable core [2024-11-08 16:58:58,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:58:59,664 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 [2024-11-08 16:59:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:00,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:59:00,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:59:00,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:59:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:00,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282499222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:59:00,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:59:00,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 49] total 78 [2024-11-08 16:59:00,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145049996] [2024-11-08 16:59:00,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:59:00,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-08 16:59:00,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:59:00,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-08 16:59:00,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5790, Unknown=0, NotChecked=0, Total=6006 [2024-11-08 16:59:00,547 INFO L87 Difference]: Start difference. First operand 579 states and 628 transitions. Second operand has 78 states, 78 states have (on average 3.6666666666666665) internal successors, (286), 78 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:59:07,573 INFO L93 Difference]: Finished difference Result 1032 states and 1119 transitions. [2024-11-08 16:59:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-08 16:59:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.6666666666666665) internal successors, (286), 78 states have internal predecessors, (286), 0 states have call successors, (0), 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 193 [2024-11-08 16:59:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:59:07,575 INFO L225 Difference]: With dead ends: 1032 [2024-11-08 16:59:07,575 INFO L226 Difference]: Without dead ends: 600 [2024-11-08 16:59:07,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3209 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=484, Invalid=14278, Unknown=0, NotChecked=0, Total=14762 [2024-11-08 16:59:07,577 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 238 mSDsluCounter, 7776 mSDsCounter, 0 mSdLazyCounter, 9073 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 7907 SdHoareTripleChecker+Invalid, 9093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 9073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:59:07,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 7907 Invalid, 9093 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 9073 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-08 16:59:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2024-11-08 16:59:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 591. [2024-11-08 16:59:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.0847457627118644) internal successors, (640), 590 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 640 transitions. [2024-11-08 16:59:07,586 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 640 transitions. Word has length 193 [2024-11-08 16:59:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:59:07,586 INFO L471 AbstractCegarLoop]: Abstraction has 591 states and 640 transitions. [2024-11-08 16:59:07,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.6666666666666665) internal successors, (286), 78 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 640 transitions. [2024-11-08 16:59:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-08 16:59:07,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:59:07,588 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:59:07,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-08 16:59:07,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-08 16:59:07,789 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:59:07,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:59:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1440369933, now seen corresponding path program 37 times [2024-11-08 16:59:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:59:07,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114056139] [2024-11-08 16:59:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:59:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:59:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:59:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 630 proven. 1140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:11,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:59:11,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114056139] [2024-11-08 16:59:11,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114056139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:59:11,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286903099] [2024-11-08 16:59:11,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:59:11,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:59:11,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:59:11,480 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:59:11,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-08 16:59:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:59:11,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 198 conjuncts are in the unsatisfiable core [2024-11-08 16:59:11,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:59:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 703 proven. 1067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:13,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:59:16,140 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 [2024-11-08 16:59:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 703 proven. 1067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:17,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286903099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:59:17,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:59:17,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 98 [2024-11-08 16:59:17,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528427962] [2024-11-08 16:59:17,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:59:17,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-08 16:59:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:59:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-08 16:59:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1054, Invalid=8648, Unknown=0, NotChecked=0, Total=9702 [2024-11-08 16:59:17,292 INFO L87 Difference]: Start difference. First operand 591 states and 640 transitions. Second operand has 99 states, 98 states have (on average 4.051020408163265) internal successors, (397), 99 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:59:24,348 INFO L93 Difference]: Finished difference Result 726 states and 777 transitions. [2024-11-08 16:59:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-08 16:59:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 4.051020408163265) internal successors, (397), 99 states have internal predecessors, (397), 0 states have call successors, (0), 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 197 [2024-11-08 16:59:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:59:24,351 INFO L225 Difference]: With dead ends: 726 [2024-11-08 16:59:24,351 INFO L226 Difference]: Without dead ends: 726 [2024-11-08 16:59:24,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 322 SyntacticMatches, 21 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7837 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1838, Invalid=18184, Unknown=0, NotChecked=0, Total=20022 [2024-11-08 16:59:24,353 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 751 mSDsluCounter, 4243 mSDsCounter, 0 mSdLazyCounter, 6840 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 4356 SdHoareTripleChecker+Invalid, 6840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:59:24,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 4356 Invalid, 6840 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 6840 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-08 16:59:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2024-11-08 16:59:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 606. [2024-11-08 16:59:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.0859504132231406) internal successors, (657), 605 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 657 transitions. [2024-11-08 16:59:24,361 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 657 transitions. Word has length 197 [2024-11-08 16:59:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:59:24,361 INFO L471 AbstractCegarLoop]: Abstraction has 606 states and 657 transitions. [2024-11-08 16:59:24,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 4.051020408163265) internal successors, (397), 99 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 657 transitions. [2024-11-08 16:59:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-08 16:59:24,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:59:24,363 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:59:24,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-08 16:59:24,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:59:24,564 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:59:24,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:59:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1121400157, now seen corresponding path program 38 times [2024-11-08 16:59:24,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:59:24,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642815370] [2024-11-08 16:59:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:59:24,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:59:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:59:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 62 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:28,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:59:28,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642815370] [2024-11-08 16:59:28,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642815370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:59:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200052630] [2024-11-08 16:59:28,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:59:28,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:59:28,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:59:28,191 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:59:28,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-08 16:59:28,623 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:59:28,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:59:28,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-08 16:59:28,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:59:29,952 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 [2024-11-08 16:59:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 62 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:30,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:59:30,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:59:30,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 16:59:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 62 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:30,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200052630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:59:30,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:59:30,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 81 [2024-11-08 16:59:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115622080] [2024-11-08 16:59:30,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:59:30,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-08 16:59:30,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:59:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-08 16:59:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=6256, Unknown=0, NotChecked=0, Total=6480 [2024-11-08 16:59:30,886 INFO L87 Difference]: Start difference. First operand 606 states and 657 transitions. Second operand has 81 states, 81 states have (on average 3.7037037037037037) internal successors, (300), 81 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:59:38,279 INFO L93 Difference]: Finished difference Result 1080 states and 1171 transitions. [2024-11-08 16:59:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-08 16:59:38,279 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.7037037037037037) internal successors, (300), 81 states have internal predecessors, (300), 0 states have call successors, (0), 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 202 [2024-11-08 16:59:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:59:38,281 INFO L225 Difference]: With dead ends: 1080 [2024-11-08 16:59:38,281 INFO L226 Difference]: Without dead ends: 627 [2024-11-08 16:59:38,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=504, Invalid=15498, Unknown=0, NotChecked=0, Total=16002 [2024-11-08 16:59:38,282 INFO L432 NwaCegarLoop]: 137 mSDtfsCounter, 243 mSDsluCounter, 7393 mSDsCounter, 0 mSdLazyCounter, 9433 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 7530 SdHoareTripleChecker+Invalid, 9453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 9433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:59:38,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 7530 Invalid, 9453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 9433 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-08 16:59:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2024-11-08 16:59:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 618. [2024-11-08 16:59:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.0842787682333874) internal successors, (669), 617 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 669 transitions. [2024-11-08 16:59:38,289 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 669 transitions. Word has length 202 [2024-11-08 16:59:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:59:38,289 INFO L471 AbstractCegarLoop]: Abstraction has 618 states and 669 transitions. [2024-11-08 16:59:38,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.7037037037037037) internal successors, (300), 81 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 669 transitions. [2024-11-08 16:59:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-08 16:59:38,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:59:38,291 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:59:38,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-08 16:59:38,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:59:38,491 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:59:38,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:59:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash -652747051, now seen corresponding path program 39 times [2024-11-08 16:59:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:59:38,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374515902] [2024-11-08 16:59:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:59:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:59:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:59:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 703 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:59:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374515902] [2024-11-08 16:59:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374515902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:59:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731150333] [2024-11-08 16:59:41,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:59:41,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:59:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:59:41,803 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:59:41,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-08 16:59:44,134 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-08 16:59:44,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:59:44,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-08 16:59:44,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:59:44,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:59:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 800 proven. 1153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:47,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:59:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 800 proven. 1153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:59:52,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731150333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:59:52,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:59:52,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 146 [2024-11-08 16:59:52,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311655639] [2024-11-08 16:59:52,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:59:52,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2024-11-08 16:59:52,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:59:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2024-11-08 16:59:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=18607, Unknown=0, NotChecked=0, Total=21462 [2024-11-08 16:59:52,560 INFO L87 Difference]: Start difference. First operand 618 states and 669 transitions. Second operand has 147 states, 146 states have (on average 4.164383561643835) internal successors, (608), 147 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:59:58,757 INFO L93 Difference]: Finished difference Result 759 states and 812 transitions. [2024-11-08 16:59:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-08 16:59:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 146 states have (on average 4.164383561643835) internal successors, (608), 147 states have internal predecessors, (608), 0 states have call successors, (0), 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 206 [2024-11-08 16:59:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:59:58,760 INFO L225 Difference]: With dead ends: 759 [2024-11-08 16:59:58,760 INFO L226 Difference]: Without dead ends: 759 [2024-11-08 16:59:58,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12464 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=4283, Invalid=32389, Unknown=0, NotChecked=0, Total=36672 [2024-11-08 16:59:58,762 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 649 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 4216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 4216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:59:58,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 2916 Invalid, 4216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4216 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-08 16:59:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2024-11-08 16:59:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 633. [2024-11-08 16:59:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.0854430379746836) internal successors, (686), 632 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 686 transitions. [2024-11-08 16:59:58,769 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 686 transitions. Word has length 206 [2024-11-08 16:59:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:59:58,770 INFO L471 AbstractCegarLoop]: Abstraction has 633 states and 686 transitions. [2024-11-08 16:59:58,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 146 states have (on average 4.164383561643835) internal successors, (608), 147 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:59:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 686 transitions. [2024-11-08 16:59:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-08 16:59:58,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:59:58,772 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:59:58,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-08 16:59:58,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:59:58,973 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:59:58,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:59:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2100242107, now seen corresponding path program 40 times [2024-11-08 16:59:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:59:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36827346] [2024-11-08 16:59:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:59:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:59:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 65 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:02,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:00:02,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36827346] [2024-11-08 17:00:02,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36827346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:00:02,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282190393] [2024-11-08 17:00:02,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:00:02,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:02,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:02,877 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:02,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-08 17:00:03,437 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:00:03,438 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:00:03,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 236 conjuncts are in the unsatisfiable core [2024-11-08 17:00:03,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:04,921 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 [2024-11-08 17:00:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 65 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:05,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:00:05,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 17:00:05,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 17:00:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 65 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:06,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282190393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:00:06,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:00:06,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53, 53] total 84 [2024-11-08 17:00:06,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916772817] [2024-11-08 17:00:06,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:00:06,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-08 17:00:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:00:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-08 17:00:06,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=6740, Unknown=0, NotChecked=0, Total=6972 [2024-11-08 17:00:06,030 INFO L87 Difference]: Start difference. First operand 633 states and 686 transitions. Second operand has 84 states, 84 states have (on average 3.7261904761904763) internal successors, (313), 84 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:00:13,459 INFO L93 Difference]: Finished difference Result 1128 states and 1223 transitions. [2024-11-08 17:00:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-08 17:00:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.7261904761904763) internal successors, (313), 84 states have internal predecessors, (313), 0 states have call successors, (0), 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 211 [2024-11-08 17:00:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:00:13,462 INFO L225 Difference]: With dead ends: 1128 [2024-11-08 17:00:13,462 INFO L226 Difference]: Without dead ends: 654 [2024-11-08 17:00:13,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=524, Invalid=16768, Unknown=0, NotChecked=0, Total=17292 [2024-11-08 17:00:13,465 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 384 mSDsluCounter, 8340 mSDsCounter, 0 mSdLazyCounter, 9843 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 8483 SdHoareTripleChecker+Invalid, 9864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 9843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-08 17:00:13,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 8483 Invalid, 9864 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 9843 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-08 17:00:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2024-11-08 17:00:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 645. [2024-11-08 17:00:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0838509316770186) internal successors, (698), 644 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 698 transitions. [2024-11-08 17:00:13,477 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 698 transitions. Word has length 211 [2024-11-08 17:00:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:00:13,477 INFO L471 AbstractCegarLoop]: Abstraction has 645 states and 698 transitions. [2024-11-08 17:00:13,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.7261904761904763) internal successors, (313), 84 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 698 transitions. [2024-11-08 17:00:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-11-08 17:00:13,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:00:13,479 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:13,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-08 17:00:13,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-08 17:00:13,680 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:00:13,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash -318135229, now seen corresponding path program 41 times [2024-11-08 17:00:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:00:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776252662] [2024-11-08 17:00:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:00:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 780 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:00:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776252662] [2024-11-08 17:00:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776252662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:00:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335344147] [2024-11-08 17:00:18,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 17:00:18,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:18,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:18,072 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:18,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-08 17:00:18,992 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-08 17:00:18,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:00:19,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 222 conjuncts are in the unsatisfiable core [2024-11-08 17:00:19,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:19,012 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 [2024-11-08 17:00:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 861 proven. 1284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:21,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:00:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 861 proven. 1284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:27,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335344147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:00:27,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:00:27,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 129 [2024-11-08 17:00:27,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312742899] [2024-11-08 17:00:27,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:00:27,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2024-11-08 17:00:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:00:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2024-11-08 17:00:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=14557, Unknown=0, NotChecked=0, Total=16770 [2024-11-08 17:00:27,392 INFO L87 Difference]: Start difference. First operand 645 states and 698 transitions. Second operand has 130 states, 129 states have (on average 4.0852713178294575) internal successors, (527), 130 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:00:34,945 INFO L93 Difference]: Finished difference Result 792 states and 847 transitions. [2024-11-08 17:00:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-08 17:00:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 4.0852713178294575) internal successors, (527), 130 states have internal predecessors, (527), 0 states have call successors, (0), 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 215 [2024-11-08 17:00:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:00:34,948 INFO L225 Difference]: With dead ends: 792 [2024-11-08 17:00:34,948 INFO L226 Difference]: Without dead ends: 792 [2024-11-08 17:00:34,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10125 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=3138, Invalid=28014, Unknown=0, NotChecked=0, Total=31152 [2024-11-08 17:00:34,951 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 626 mSDsluCounter, 3583 mSDsCounter, 0 mSdLazyCounter, 6160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 3706 SdHoareTripleChecker+Invalid, 6160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-08 17:00:34,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 3706 Invalid, 6160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6160 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-08 17:00:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2024-11-08 17:00:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 660. [2024-11-08 17:00:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 1.0849772382397571) internal successors, (715), 659 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 715 transitions. [2024-11-08 17:00:34,960 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 715 transitions. Word has length 215 [2024-11-08 17:00:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:00:34,960 INFO L471 AbstractCegarLoop]: Abstraction has 660 states and 715 transitions. [2024-11-08 17:00:34,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 4.0852713178294575) internal successors, (527), 130 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 715 transitions. [2024-11-08 17:00:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-08 17:00:34,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:00:34,961 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:34,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-11-08 17:00:35,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-08 17:00:35,162 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:00:35,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash 507876877, now seen corresponding path program 42 times [2024-11-08 17:00:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:00:35,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928395662] [2024-11-08 17:00:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:00:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 68 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:39,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:00:39,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928395662] [2024-11-08 17:00:39,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928395662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:00:39,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675657347] [2024-11-08 17:00:39,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 17:00:39,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:39,198 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:39,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-08 17:00:43,360 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2024-11-08 17:00:43,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:00:43,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 246 conjuncts are in the unsatisfiable core [2024-11-08 17:00:43,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:45,115 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 [2024-11-08 17:00:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 68 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:45,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:00:45,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 17:00:45,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 17:00:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 68 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675657347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:00:46,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:00:46,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 55, 55] total 87 [2024-11-08 17:00:46,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424043126] [2024-11-08 17:00:46,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:00:46,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-08 17:00:46,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:00:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-08 17:00:46,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=7242, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 17:00:46,150 INFO L87 Difference]: Start difference. First operand 660 states and 715 transitions. Second operand has 87 states, 87 states have (on average 3.735632183908046) internal successors, (325), 87 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:00:54,801 INFO L93 Difference]: Finished difference Result 1176 states and 1275 transitions. [2024-11-08 17:00:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-08 17:00:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.735632183908046) internal successors, (325), 87 states have internal predecessors, (325), 0 states have call successors, (0), 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 220 [2024-11-08 17:00:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:00:54,803 INFO L225 Difference]: With dead ends: 1176 [2024-11-08 17:00:54,803 INFO L226 Difference]: Without dead ends: 681 [2024-11-08 17:00:54,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4055 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=544, Invalid=18088, Unknown=0, NotChecked=0, Total=18632 [2024-11-08 17:00:54,804 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 265 mSDsluCounter, 9580 mSDsCounter, 0 mSdLazyCounter, 11285 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 9729 SdHoareTripleChecker+Invalid, 11308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-08 17:00:54,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 9729 Invalid, 11308 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [23 Valid, 11285 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-08 17:00:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2024-11-08 17:00:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 672. [2024-11-08 17:00:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.0834575260804769) internal successors, (727), 671 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 727 transitions. [2024-11-08 17:00:54,812 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 727 transitions. Word has length 220 [2024-11-08 17:00:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:00:54,813 INFO L471 AbstractCegarLoop]: Abstraction has 672 states and 727 transitions. [2024-11-08 17:00:54,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.735632183908046) internal successors, (325), 87 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 727 transitions. [2024-11-08 17:00:54,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-08 17:00:54,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:00:54,814 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:54,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-08 17:00:55,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-08 17:00:55,015 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:00:55,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:55,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2031365755, now seen corresponding path program 43 times [2024-11-08 17:00:55,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:00:55,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195142849] [2024-11-08 17:00:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:00:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 861 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:59,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:00:59,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195142849] [2024-11-08 17:00:59,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195142849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:00:59,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100994121] [2024-11-08 17:00:59,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 17:00:59,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:59,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:59,673 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:59,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-08 17:01:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:01:00,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 225 conjuncts are in the unsatisfiable core [2024-11-08 17:01:00,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:01:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 946 proven. 1400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:01:02,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:01:05,159 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 [2024-11-08 17:01:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 946 proven. 1400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:01:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100994121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:01:06,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:01:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 110 [2024-11-08 17:01:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709345457] [2024-11-08 17:01:06,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:01:06,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-11-08 17:01:06,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:01:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-11-08 17:01:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=10868, Unknown=0, NotChecked=0, Total=12210 [2024-11-08 17:01:06,561 INFO L87 Difference]: Start difference. First operand 672 states and 727 transitions. Second operand has 111 states, 110 states have (on average 4.1) internal successors, (451), 111 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:01:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:01:14,865 INFO L93 Difference]: Finished difference Result 825 states and 882 transitions. [2024-11-08 17:01:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-08 17:01:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 4.1) internal successors, (451), 111 states have internal predecessors, (451), 0 states have call successors, (0), 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 224 [2024-11-08 17:01:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:01:14,868 INFO L225 Difference]: With dead ends: 825 [2024-11-08 17:01:14,868 INFO L226 Difference]: Without dead ends: 825 [2024-11-08 17:01:14,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 367 SyntacticMatches, 24 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10108 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2309, Invalid=23131, Unknown=0, NotChecked=0, Total=25440 [2024-11-08 17:01:14,871 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 584 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 8607 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 5645 SdHoareTripleChecker+Invalid, 8607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-08 17:01:14,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 5645 Invalid, 8607 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8607 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-08 17:01:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2024-11-08 17:01:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 687. [2024-11-08 17:01:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.0845481049562682) internal successors, (744), 686 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:01:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 744 transitions. [2024-11-08 17:01:14,884 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 744 transitions. Word has length 224 [2024-11-08 17:01:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:01:14,884 INFO L471 AbstractCegarLoop]: Abstraction has 687 states and 744 transitions. [2024-11-08 17:01:14,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 4.1) internal successors, (451), 111 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:01:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 744 transitions. [2024-11-08 17:01:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-08 17:01:14,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:01:14,886 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:01:14,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-08 17:01:15,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-08 17:01:15,087 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:01:15,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:01:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1671994869, now seen corresponding path program 44 times [2024-11-08 17:01:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:01:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049826826] [2024-11-08 17:01:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:01:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:01:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:01:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 71 proven. 2392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:01:19,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:01:19,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049826826] [2024-11-08 17:01:19,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049826826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:01:19,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398162031] [2024-11-08 17:01:19,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:01:19,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:01:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:01:19,255 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:01:19,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-08 17:01:19,743 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:01:19,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:01:19,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 288 conjuncts are in the unsatisfiable core [2024-11-08 17:01:19,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:01:22,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 17:01:22,573 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 [2024-11-08 17:01:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 48 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:01:26,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:01:29,661 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 19 treesize of output 17 [2024-11-08 17:01:29,663 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 28 treesize of output 24 [2024-11-08 17:01:29,801 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 [2024-11-08 17:01:29,803 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 14 treesize of output 12 [2024-11-08 17:01:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 48 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:01:33,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398162031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:01:33,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:01:33,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 62, 61] total 177 [2024-11-08 17:01:33,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624372542] [2024-11-08 17:01:33,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:01:33,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2024-11-08 17:01:33,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:01:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2024-11-08 17:01:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=30601, Unknown=0, NotChecked=0, Total=31152 [2024-11-08 17:01:33,657 INFO L87 Difference]: Start difference. First operand 687 states and 744 transitions. Second operand has 177 states, 177 states have (on average 3.824858757062147) internal successors, (677), 177 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:02:00,625 INFO L93 Difference]: Finished difference Result 1453 states and 1557 transitions. [2024-11-08 17:02:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2024-11-08 17:02:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 3.824858757062147) internal successors, (677), 177 states have internal predecessors, (677), 0 states have call successors, (0), 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 229 [2024-11-08 17:02:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:02:00,628 INFO L225 Difference]: With dead ends: 1453 [2024-11-08 17:02:00,628 INFO L226 Difference]: Without dead ends: 811 [2024-11-08 17:02:00,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28972 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=1618, Invalid=96038, Unknown=0, NotChecked=0, Total=97656 [2024-11-08 17:02:00,633 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 473 mSDsluCounter, 14752 mSDsCounter, 0 mSdLazyCounter, 28329 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 14879 SdHoareTripleChecker+Invalid, 28376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 28329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:02:00,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 14879 Invalid, 28376 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [47 Valid, 28329 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2024-11-08 17:02:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2024-11-08 17:02:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 699. [2024-11-08 17:02:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 1.0830945558739256) internal successors, (756), 698 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 756 transitions. [2024-11-08 17:02:00,642 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 756 transitions. Word has length 229 [2024-11-08 17:02:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:02:00,642 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 756 transitions. [2024-11-08 17:02:00,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 3.824858757062147) internal successors, (677), 177 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 756 transitions. [2024-11-08 17:02:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2024-11-08 17:02:00,644 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:02:00,645 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:02:00,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-08 17:02:00,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:00,845 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:02:00,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:02:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -34566765, now seen corresponding path program 45 times [2024-11-08 17:02:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:02:00,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857915933] [2024-11-08 17:02:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:02:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:02:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:02:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 946 proven. 1610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:02:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857915933] [2024-11-08 17:02:05,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857915933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:02:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76478028] [2024-11-08 17:02:05,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:02:05,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:05,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:02:05,153 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:02:05,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-08 17:02:06,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-08 17:02:06,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:02:06,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-11-08 17:02:06,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:02:06,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 17:02:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 1058 proven. 1498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:10,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:02:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 1058 proven. 1498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76478028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:02:17,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:02:17,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 164 [2024-11-08 17:02:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354085752] [2024-11-08 17:02:17,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:02:17,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2024-11-08 17:02:17,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:02:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2024-11-08 17:02:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3650, Invalid=23410, Unknown=0, NotChecked=0, Total=27060 [2024-11-08 17:02:17,237 INFO L87 Difference]: Start difference. First operand 699 states and 756 transitions. Second operand has 165 states, 164 states have (on average 4.201219512195122) internal successors, (689), 165 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:02:24,257 INFO L93 Difference]: Finished difference Result 858 states and 917 transitions. [2024-11-08 17:02:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-08 17:02:24,258 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 164 states have (on average 4.201219512195122) internal successors, (689), 165 states have internal predecessors, (689), 0 states have call successors, (0), 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 233 [2024-11-08 17:02:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:02:24,260 INFO L225 Difference]: With dead ends: 858 [2024-11-08 17:02:24,260 INFO L226 Difference]: Without dead ends: 858 [2024-11-08 17:02:24,265 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15926 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=5423, Invalid=41017, Unknown=0, NotChecked=0, Total=46440 [2024-11-08 17:02:24,266 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 768 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 4687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 3400 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-08 17:02:24,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 3400 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4687 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-08 17:02:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2024-11-08 17:02:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 714. [2024-11-08 17:02:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 1.0841514726507715) internal successors, (773), 713 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 773 transitions. [2024-11-08 17:02:24,279 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 773 transitions. Word has length 233 [2024-11-08 17:02:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:02:24,279 INFO L471 AbstractCegarLoop]: Abstraction has 714 states and 773 transitions. [2024-11-08 17:02:24,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 164 states have (on average 4.201219512195122) internal successors, (689), 165 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 773 transitions. [2024-11-08 17:02:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-08 17:02:24,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:02:24,282 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:02:24,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-08 17:02:24,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:24,483 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:02:24,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:02:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash -825491779, now seen corresponding path program 46 times [2024-11-08 17:02:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:02:24,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53065956] [2024-11-08 17:02:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:02:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:02:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:02:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 74 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:29,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:02:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53065956] [2024-11-08 17:02:29,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53065956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:02:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156976899] [2024-11-08 17:02:29,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:02:29,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:02:29,477 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:02:29,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-08 17:02:30,258 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:02:30,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:02:30,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 266 conjuncts are in the unsatisfiable core [2024-11-08 17:02:30,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:02:31,983 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 [2024-11-08 17:02:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 74 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:32,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:02:32,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 17:02:32,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 17:02:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 74 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:33,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156976899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:02:33,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:02:33,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59, 59] total 93 [2024-11-08 17:02:33,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874961179] [2024-11-08 17:02:33,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:02:33,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-08 17:02:33,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:02:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-08 17:02:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=8300, Unknown=0, NotChecked=0, Total=8556 [2024-11-08 17:02:33,143 INFO L87 Difference]: Start difference. First operand 714 states and 773 transitions. Second operand has 93 states, 93 states have (on average 3.78494623655914) internal successors, (352), 93 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:02:43,206 INFO L93 Difference]: Finished difference Result 1272 states and 1379 transitions. [2024-11-08 17:02:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-08 17:02:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.78494623655914) internal successors, (352), 93 states have internal predecessors, (352), 0 states have call successors, (0), 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 238 [2024-11-08 17:02:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:02:43,208 INFO L225 Difference]: With dead ends: 1272 [2024-11-08 17:02:43,208 INFO L226 Difference]: Without dead ends: 735 [2024-11-08 17:02:43,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4674 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=584, Invalid=20878, Unknown=0, NotChecked=0, Total=21462 [2024-11-08 17:02:43,210 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 435 mSDsluCounter, 11442 mSDsCounter, 0 mSdLazyCounter, 13230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 11603 SdHoareTripleChecker+Invalid, 13254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 13230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-08 17:02:43,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 11603 Invalid, 13254 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 13230 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-11-08 17:02:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-11-08 17:02:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 726. [2024-11-08 17:02:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.0827586206896551) internal successors, (785), 725 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 785 transitions. [2024-11-08 17:02:43,217 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 785 transitions. Word has length 238 [2024-11-08 17:02:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:02:43,217 INFO L471 AbstractCegarLoop]: Abstraction has 726 states and 785 transitions. [2024-11-08 17:02:43,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.78494623655914) internal successors, (352), 93 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 785 transitions. [2024-11-08 17:02:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2024-11-08 17:02:43,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:02:43,219 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:02:43,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-08 17:02:43,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:43,419 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:02:43,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:02:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1180126261, now seen corresponding path program 47 times [2024-11-08 17:02:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:02:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607193844] [2024-11-08 17:02:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:02:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:02:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:02:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1035 proven. 1740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:48,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:02:48,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607193844] [2024-11-08 17:02:48,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607193844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:02:48,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126196172] [2024-11-08 17:02:48,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 17:02:48,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:48,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:02:48,624 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:02:48,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-08 17:02:49,930 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-11-08 17:02:49,931 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:02:49,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 249 conjuncts are in the unsatisfiable core [2024-11-08 17:02:49,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:02:49,955 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 [2024-11-08 17:02:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1128 proven. 1647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:52,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:02:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1128 proven. 1647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:02:59,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126196172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:02:59,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:02:59,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 144 [2024-11-08 17:02:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236479560] [2024-11-08 17:02:59,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:02:59,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2024-11-08 17:02:59,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:02:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2024-11-08 17:02:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2768, Invalid=18112, Unknown=0, NotChecked=0, Total=20880 [2024-11-08 17:02:59,998 INFO L87 Difference]: Start difference. First operand 726 states and 785 transitions. Second operand has 145 states, 144 states have (on average 4.118055555555555) internal successors, (593), 145 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:03:09,478 INFO L93 Difference]: Finished difference Result 891 states and 952 transitions. [2024-11-08 17:03:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-08 17:03:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 144 states have (on average 4.118055555555555) internal successors, (593), 145 states have internal predecessors, (593), 0 states have call successors, (0), 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 242 [2024-11-08 17:03:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:03:09,481 INFO L225 Difference]: With dead ends: 891 [2024-11-08 17:03:09,481 INFO L226 Difference]: Without dead ends: 891 [2024-11-08 17:03:09,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12768 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=3891, Invalid=35115, Unknown=0, NotChecked=0, Total=39006 [2024-11-08 17:03:09,484 INFO L432 NwaCegarLoop]: 138 mSDtfsCounter, 1042 mSDsluCounter, 4814 mSDsCounter, 0 mSdLazyCounter, 8505 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 4952 SdHoareTripleChecker+Invalid, 8505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:03:09,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 4952 Invalid, 8505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8505 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-08 17:03:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2024-11-08 17:03:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 741. [2024-11-08 17:03:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.0837837837837838) internal successors, (802), 740 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 802 transitions. [2024-11-08 17:03:09,492 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 802 transitions. Word has length 242 [2024-11-08 17:03:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:03:09,492 INFO L471 AbstractCegarLoop]: Abstraction has 741 states and 802 transitions. [2024-11-08 17:03:09,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 144 states have (on average 4.118055555555555) internal successors, (593), 145 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 802 transitions. [2024-11-08 17:03:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-08 17:03:09,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:03:09,494 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:03:09,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-11-08 17:03:09,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:03:09,695 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:03:09,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:03:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash 593302875, now seen corresponding path program 48 times [2024-11-08 17:03:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:03:09,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436576134] [2024-11-08 17:03:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:03:09,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:03:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:03:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2902 backedges. 77 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:03:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:03:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436576134] [2024-11-08 17:03:14,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436576134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:03:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579573811] [2024-11-08 17:03:14,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 17:03:14,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:03:14,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:03:14,947 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:03:14,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-08 17:03:20,370 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-08 17:03:20,370 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:03:20,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 276 conjuncts are in the unsatisfiable core [2024-11-08 17:03:20,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:03:22,221 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 [2024-11-08 17:03:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2902 backedges. 77 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:03:22,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:03:23,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 17:03:23,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 17:03:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2902 backedges. 77 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:03:23,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579573811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:03:23,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:03:23,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 61, 61] total 96 [2024-11-08 17:03:23,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444577633] [2024-11-08 17:03:23,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:03:23,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-08 17:03:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:03:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-08 17:03:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=8856, Unknown=0, NotChecked=0, Total=9120 [2024-11-08 17:03:23,369 INFO L87 Difference]: Start difference. First operand 741 states and 802 transitions. Second operand has 96 states, 96 states have (on average 3.7916666666666665) internal successors, (364), 96 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:03:34,037 INFO L93 Difference]: Finished difference Result 1320 states and 1431 transitions. [2024-11-08 17:03:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-08 17:03:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.7916666666666665) internal successors, (364), 96 states have internal predecessors, (364), 0 states have call successors, (0), 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 247 [2024-11-08 17:03:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:03:34,039 INFO L225 Difference]: With dead ends: 1320 [2024-11-08 17:03:34,039 INFO L226 Difference]: Without dead ends: 762 [2024-11-08 17:03:34,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5000 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=604, Invalid=22348, Unknown=0, NotChecked=0, Total=22952 [2024-11-08 17:03:34,042 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 298 mSDsluCounter, 11908 mSDsCounter, 0 mSdLazyCounter, 13968 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 12075 SdHoareTripleChecker+Invalid, 13994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 13968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:03:34,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 12075 Invalid, 13994 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 13968 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2024-11-08 17:03:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2024-11-08 17:03:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 753. [2024-11-08 17:03:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 1.0824468085106382) internal successors, (814), 752 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 814 transitions. [2024-11-08 17:03:34,049 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 814 transitions. Word has length 247 [2024-11-08 17:03:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:03:34,049 INFO L471 AbstractCegarLoop]: Abstraction has 753 states and 814 transitions. [2024-11-08 17:03:34,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.7916666666666665) internal successors, (364), 96 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 814 transitions. [2024-11-08 17:03:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-11-08 17:03:34,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:03:34,051 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:03:34,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-11-08 17:03:34,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-11-08 17:03:34,251 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:03:34,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:03:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1851429149, now seen corresponding path program 49 times [2024-11-08 17:03:34,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:03:34,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828606358] [2024-11-08 17:03:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:03:34,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:03:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:03:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 1128 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:03:39,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:03:39,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828606358] [2024-11-08 17:03:39,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828606358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:03:39,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653090901] [2024-11-08 17:03:39,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 17:03:39,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:03:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:03:39,960 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:03:39,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-08 17:03:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:03:40,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 252 conjuncts are in the unsatisfiable core [2024-11-08 17:03:40,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:03:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 1225 proven. 1778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:03:43,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:03:46,617 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 [2024-11-08 17:03:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 1225 proven. 1778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:03:48,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653090901] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:03:48,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:03:48,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 122 [2024-11-08 17:03:48,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925352647] [2024-11-08 17:03:48,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:03:48,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-11-08 17:03:48,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:03:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-11-08 17:03:48,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1666, Invalid=13340, Unknown=0, NotChecked=0, Total=15006 [2024-11-08 17:03:48,301 INFO L87 Difference]: Start difference. First operand 753 states and 814 transitions. Second operand has 123 states, 122 states have (on average 4.139344262295082) internal successors, (505), 123 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:03:56,566 INFO L93 Difference]: Finished difference Result 924 states and 987 transitions. [2024-11-08 17:03:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-08 17:03:56,567 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 4.139344262295082) internal successors, (505), 123 states have internal predecessors, (505), 0 states have call successors, (0), 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 251 [2024-11-08 17:03:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:03:56,568 INFO L225 Difference]: With dead ends: 924 [2024-11-08 17:03:56,568 INFO L226 Difference]: Without dead ends: 924 [2024-11-08 17:03:56,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 412 SyntacticMatches, 27 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12667 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2834, Invalid=28672, Unknown=0, NotChecked=0, Total=31506 [2024-11-08 17:03:56,570 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 801 mSDsluCounter, 5378 mSDsCounter, 0 mSdLazyCounter, 9103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 5521 SdHoareTripleChecker+Invalid, 9103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:03:56,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 5521 Invalid, 9103 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 9103 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-08 17:03:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2024-11-08 17:03:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 768. [2024-11-08 17:03:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.0834419817470664) internal successors, (831), 767 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 831 transitions. [2024-11-08 17:03:56,576 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 831 transitions. Word has length 251 [2024-11-08 17:03:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:03:56,576 INFO L471 AbstractCegarLoop]: Abstraction has 768 states and 831 transitions. [2024-11-08 17:03:56,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 4.139344262295082) internal successors, (505), 123 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:03:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 831 transitions. [2024-11-08 17:03:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-08 17:03:56,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:03:56,578 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:03:56,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-11-08 17:03:56,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-11-08 17:03:56,778 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:03:56,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:03:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash -427856019, now seen corresponding path program 50 times [2024-11-08 17:03:56,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:03:56,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935417716] [2024-11-08 17:03:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:03:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:03:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:04:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 80 proven. 3055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:04:01,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:04:01,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935417716] [2024-11-08 17:04:01,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935417716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:04:01,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356423484] [2024-11-08 17:04:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:04:01,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:04:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:04:01,717 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:04:01,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-08 17:04:02,252 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:04:02,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:04:02,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 313 conjuncts are in the unsatisfiable core [2024-11-08 17:04:02,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:04:05,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 17:04:05,313 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 [2024-11-08 17:04:05,686 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:04:05,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:04:05,689 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 15 treesize of output 10 [2024-11-08 17:04:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 80 proven. 3055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:04:06,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:04:06,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 17:04:06,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 17:04:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 80 proven. 3055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:04:09,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356423484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:04:09,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:04:09,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 68, 65] total 135 [2024-11-08 17:04:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902889379] [2024-11-08 17:04:09,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:04:09,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-11-08 17:04:09,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:04:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-11-08 17:04:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=17642, Unknown=0, NotChecked=0, Total=18090 [2024-11-08 17:04:09,553 INFO L87 Difference]: Start difference. First operand 768 states and 831 transitions. Second operand has 135 states, 135 states have (on average 3.6296296296296298) internal successors, (490), 135 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:04:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:04:28,741 INFO L93 Difference]: Finished difference Result 1490 states and 1607 transitions. [2024-11-08 17:04:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-11-08 17:04:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.6296296296296298) internal successors, (490), 135 states have internal predecessors, (490), 0 states have call successors, (0), 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 256 [2024-11-08 17:04:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:04:28,744 INFO L225 Difference]: With dead ends: 1490 [2024-11-08 17:04:28,744 INFO L226 Difference]: Without dead ends: 904 [2024-11-08 17:04:28,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15023 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=1537, Invalid=62725, Unknown=0, NotChecked=0, Total=64262 [2024-11-08 17:04:28,749 INFO L432 NwaCegarLoop]: 168 mSDtfsCounter, 717 mSDsluCounter, 13404 mSDsCounter, 0 mSdLazyCounter, 17177 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 13572 SdHoareTripleChecker+Invalid, 17229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 17177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:04:28,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 13572 Invalid, 17229 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 17177 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2024-11-08 17:04:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2024-11-08 17:04:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 780. [2024-11-08 17:04:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.0821566110397947) internal successors, (843), 779 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:04:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 843 transitions. [2024-11-08 17:04:28,757 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 843 transitions. Word has length 256 [2024-11-08 17:04:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:04:28,757 INFO L471 AbstractCegarLoop]: Abstraction has 780 states and 843 transitions. [2024-11-08 17:04:28,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.6296296296296298) internal successors, (490), 135 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:04:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 843 transitions. [2024-11-08 17:04:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2024-11-08 17:04:28,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:04:28,759 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:04:28,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-11-08 17:04:28,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-11-08 17:04:28,959 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:04:28,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:04:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1485786853, now seen corresponding path program 51 times [2024-11-08 17:04:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:04:28,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632018888] [2024-11-08 17:04:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:04:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:04:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:04:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 1225 proven. 2015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:04:35,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:04:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632018888] [2024-11-08 17:04:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632018888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:04:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103844603] [2024-11-08 17:04:35,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:04:35,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:04:35,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:04:35,054 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:04:35,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-08 17:04:44,756 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2024-11-08 17:04:44,756 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:04:44,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-11-08 17:04:44,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:04:44,783 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 [2024-11-08 17:04:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 1352 proven. 1888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:04:49,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:04:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 1352 proven. 1888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:04:57,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103844603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:04:57,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:04:57,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 182 [2024-11-08 17:04:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389084126] [2024-11-08 17:04:57,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:04:57,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2024-11-08 17:04:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:04:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2024-11-08 17:04:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4543, Invalid=28763, Unknown=0, NotChecked=0, Total=33306 [2024-11-08 17:04:57,205 INFO L87 Difference]: Start difference. First operand 780 states and 843 transitions. Second operand has 183 states, 182 states have (on average 4.230769230769231) internal successors, (770), 183 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:05:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:05:05,024 INFO L93 Difference]: Finished difference Result 957 states and 1022 transitions. [2024-11-08 17:05:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-08 17:05:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 182 states have (on average 4.230769230769231) internal successors, (770), 183 states have internal predecessors, (770), 0 states have call successors, (0), 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 260 [2024-11-08 17:05:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:05:05,027 INFO L225 Difference]: With dead ends: 957 [2024-11-08 17:05:05,027 INFO L226 Difference]: Without dead ends: 957 [2024-11-08 17:05:05,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19607 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=6697, Invalid=50663, Unknown=0, NotChecked=0, Total=57360 [2024-11-08 17:05:05,033 INFO L432 NwaCegarLoop]: 148 mSDtfsCounter, 905 mSDsluCounter, 4591 mSDsCounter, 0 mSdLazyCounter, 6952 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 4739 SdHoareTripleChecker+Invalid, 6952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:05:05,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 4739 Invalid, 6952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6952 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-08 17:05:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2024-11-08 17:05:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 795. [2024-11-08 17:05:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.0831234256926952) internal successors, (860), 794 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:05:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 860 transitions. [2024-11-08 17:05:05,042 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 860 transitions. Word has length 260 [2024-11-08 17:05:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:05:05,042 INFO L471 AbstractCegarLoop]: Abstraction has 795 states and 860 transitions. [2024-11-08 17:05:05,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 182 states have (on average 4.230769230769231) internal successors, (770), 183 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:05:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 860 transitions. [2024-11-08 17:05:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2024-11-08 17:05:05,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:05:05,045 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:05:05,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-11-08 17:05:05,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:05:05,245 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 17:05:05,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:05:05,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1244348587, now seen corresponding path program 52 times [2024-11-08 17:05:05,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:05:05,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395954485] [2024-11-08 17:05:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:05:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:05:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:05:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3377 backedges. 83 proven. 3294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:05:10,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:05:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395954485] [2024-11-08 17:05:10,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395954485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:05:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400571854] [2024-11-08 17:05:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:05:10,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:05:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:05:10,683 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:05:10,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9e2afd-427e-4e48-8cc1-403f067026b7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-08 17:05:11,519 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:05:11,519 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:05:11,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 322 conjuncts are in the unsatisfiable core [2024-11-08 17:05:11,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:05:14,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 17:05:14,604 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 [2024-11-08 17:05:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3377 backedges. 56 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:05:19,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:05:23,741 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 19 treesize of output 17 [2024-11-08 17:05:23,744 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 28 treesize of output 24 [2024-11-08 17:05:23,756 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 [2024-11-08 17:05:23,760 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 14 treesize of output 12 [2024-11-08 17:05:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3377 backedges. 56 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:05:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400571854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:05:24,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:05:24,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 69, 69] total 171 [2024-11-08 17:05:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767975661] [2024-11-08 17:05:24,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:05:24,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2024-11-08 17:05:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:05:24,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2024-11-08 17:05:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=28594, Unknown=0, NotChecked=0, Total=29070 [2024-11-08 17:05:24,505 INFO L87 Difference]: Start difference. First operand 795 states and 860 transitions. Second operand has 171 states, 171 states have (on average 3.953216374269006) internal successors, (676), 171 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)