./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ddbc486d8837447489a9f02b29f9b0c86837a784a73349e3a6819c320282b326 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:42:44,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:42:44,286 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:42:44,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:42:44,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:42:44,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:42:44,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:42:44,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:42:44,324 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:42:44,325 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:42:44,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:42:44,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:42:44,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:42:44,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:42:44,328 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:42:44,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:42:44,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:42:44,330 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:42:44,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:42:44,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:42:44,332 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:42:44,333 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:42:44,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:42:44,334 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:42:44,335 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:42:44,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:42:44,336 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:42:44,337 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:42:44,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:42:44,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:42:44,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:42:44,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:44,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:42:44,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:42:44,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:42:44,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:42:44,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:42:44,342 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:42:44,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:42:44,342 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:42:44,343 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:42:44,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:42:44,343 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_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddbc486d8837447489a9f02b29f9b0c86837a784a73349e3a6819c320282b326 [2023-11-24 21:42:44,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:42:44,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:42:44,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:42:44,668 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:42:44,668 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:42:44,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem12_label52.c [2023-11-24 21:42:47,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:42:48,651 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:42:48,653 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/sv-benchmarks/c/eca-rers2012/Problem12_label52.c [2023-11-24 21:42:48,699 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/data/953c96044/c75330e6c8ca42a893155931c9919753/FLAGdf155c770 [2023-11-24 21:42:48,718 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/data/953c96044/c75330e6c8ca42a893155931c9919753 [2023-11-24 21:42:48,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:42:48,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:42:48,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:48,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:42:48,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:42:48,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9e8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:48, skipping insertion in model container [2023-11-24 21:42:48,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:42:48" (1/1) ... [2023-11-24 21:42:48,909 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:42:49,288 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/sv-benchmarks/c/eca-rers2012/Problem12_label52.c[3994,4007] [2023-11-24 21:42:50,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:50,502 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:42:50,538 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/sv-benchmarks/c/eca-rers2012/Problem12_label52.c[3994,4007] [2023-11-24 21:42:51,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:42:51,307 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:42:51,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51 WrapperNode [2023-11-24 21:42:51,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:42:51,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:51,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:42:51,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:42:51,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,412 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,822 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758 [2023-11-24 21:42:51,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:42:51,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:42:51,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:42:51,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:42:51,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:51,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,097 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 21:42:52,097 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,098 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,378 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,428 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,443 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:42:52,556 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:42:52,572 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:42:52,572 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:42:52,573 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (1/1) ... [2023-11-24 21:42:52,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:52,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:52,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:42:52,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:42:52,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:42:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:42:52,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:42:52,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:42:52,871 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:42:52,879 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:42:58,799 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:42:58,888 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:42:58,890 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:42:58,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:58 BoogieIcfgContainer [2023-11-24 21:42:58,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:42:58,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:42:58,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:42:58,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:42:58,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:42:48" (1/3) ... [2023-11-24 21:42:58,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b44507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:58, skipping insertion in model container [2023-11-24 21:42:58,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:42:51" (2/3) ... [2023-11-24 21:42:58,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b44507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:42:58, skipping insertion in model container [2023-11-24 21:42:58,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:42:58" (3/3) ... [2023-11-24 21:42:58,904 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label52.c [2023-11-24 21:42:58,926 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:42:58,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:42:59,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:42:59,027 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1d7c5fc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:42:59,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:42:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:42:59,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:42:59,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:59,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:42:59,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash 910151865, now seen corresponding path program 1 times [2023-11-24 21:42:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:59,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978054215] [2023-11-24 21:42:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978054215] [2023-11-24 21:42:59,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978054215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:59,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:59,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:42:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791877816] [2023-11-24 21:42:59,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:59,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:42:59,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:42:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:42:59,362 INFO L87 Difference]: Start difference. First operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 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 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:42:59,486 INFO L93 Difference]: Finished difference Result 1511 states and 3005 transitions. [2023-11-24 21:42:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:42:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2023-11-24 21:42:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:42:59,509 INFO L225 Difference]: With dead ends: 1511 [2023-11-24 21:42:59,509 INFO L226 Difference]: Without dead ends: 754 [2023-11-24 21:42:59,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:42:59,520 INFO L413 NwaCegarLoop]: 1438 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:42:59,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1438 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:42:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-24 21:42:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2023-11-24 21:42:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.9096945551128819) internal successors, (1438), 753 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1438 transitions. [2023-11-24 21:42:59,605 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1438 transitions. Word has length 29 [2023-11-24 21:42:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:42:59,606 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1438 transitions. [2023-11-24 21:42:59,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:42:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1438 transitions. [2023-11-24 21:42:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:42:59,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:42:59,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:42:59,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:42:59,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:42:59,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash -624375063, now seen corresponding path program 1 times [2023-11-24 21:42:59,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:59,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651281655] [2023-11-24 21:42:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:59,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:59,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651281655] [2023-11-24 21:42:59,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651281655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:42:59,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:42:59,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:42:59,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883234649] [2023-11-24 21:42:59,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:42:59,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:42:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:42:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:42:59,795 INFO L87 Difference]: Start difference. First operand 754 states and 1438 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:04,923 INFO L93 Difference]: Finished difference Result 2258 states and 4311 transitions. [2023-11-24 21:43:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2023-11-24 21:43:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:04,939 INFO L225 Difference]: With dead ends: 2258 [2023-11-24 21:43:04,939 INFO L226 Difference]: Without dead ends: 1505 [2023-11-24 21:43:04,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:04,946 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 785 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:04,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 75 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-24 21:43:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2023-11-24 21:43:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1505. [2023-11-24 21:43:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.8703457446808511) internal successors, (2813), 1504 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2813 transitions. [2023-11-24 21:43:05,009 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2813 transitions. Word has length 29 [2023-11-24 21:43:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:05,014 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2813 transitions. [2023-11-24 21:43:05,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2813 transitions. [2023-11-24 21:43:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 21:43:05,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:05,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:05,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:05,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash -846901387, now seen corresponding path program 1 times [2023-11-24 21:43:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:05,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574997878] [2023-11-24 21:43:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:05,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:05,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574997878] [2023-11-24 21:43:05,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574997878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:05,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:05,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278181651] [2023-11-24 21:43:05,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:05,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:05,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:05,360 INFO L87 Difference]: Start difference. First operand 1505 states and 2813 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:10,295 INFO L93 Difference]: Finished difference Result 4513 states and 8437 transitions. [2023-11-24 21:43:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2023-11-24 21:43:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:10,318 INFO L225 Difference]: With dead ends: 4513 [2023-11-24 21:43:10,318 INFO L226 Difference]: Without dead ends: 3009 [2023-11-24 21:43:10,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:10,323 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 918 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:10,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 352 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-24 21:43:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2023-11-24 21:43:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 3007. [2023-11-24 21:43:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 1.6533599467731204) internal successors, (4970), 3006 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 4970 transitions. [2023-11-24 21:43:10,412 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 4970 transitions. Word has length 102 [2023-11-24 21:43:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:10,413 INFO L495 AbstractCegarLoop]: Abstraction has 3007 states and 4970 transitions. [2023-11-24 21:43:10,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 4970 transitions. [2023-11-24 21:43:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-24 21:43:10,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:10,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:10,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:10,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:10,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:10,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1881985586, now seen corresponding path program 1 times [2023-11-24 21:43:10,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:10,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177961354] [2023-11-24 21:43:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:10,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:10,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177961354] [2023-11-24 21:43:10,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177961354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:10,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:10,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:10,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402730705] [2023-11-24 21:43:10,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:10,840 INFO L87 Difference]: Start difference. First operand 3007 states and 4970 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:18,163 INFO L93 Difference]: Finished difference Result 8266 states and 13428 transitions. [2023-11-24 21:43:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:18,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2023-11-24 21:43:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:18,198 INFO L225 Difference]: With dead ends: 8266 [2023-11-24 21:43:18,199 INFO L226 Difference]: Without dead ends: 5260 [2023-11-24 21:43:18,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:18,205 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 2153 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4999 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2153 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:18,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2153 Valid, 351 Invalid, 5850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [851 Valid, 4999 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-24 21:43:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2023-11-24 21:43:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 5260. [2023-11-24 21:43:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5260 states, 5259 states have (on average 1.510363186917665) internal successors, (7943), 5259 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 7943 transitions. [2023-11-24 21:43:18,345 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 7943 transitions. Word has length 115 [2023-11-24 21:43:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:18,347 INFO L495 AbstractCegarLoop]: Abstraction has 5260 states and 7943 transitions. [2023-11-24 21:43:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 7943 transitions. [2023-11-24 21:43:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-24 21:43:18,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:18,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:18,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:18,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:18,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1780431669, now seen corresponding path program 1 times [2023-11-24 21:43:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:18,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153824629] [2023-11-24 21:43:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:18,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 21:43:18,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:18,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153824629] [2023-11-24 21:43:18,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153824629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:18,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878214227] [2023-11-24 21:43:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:18,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:18,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:18,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:18,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:43:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:19,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:43:19,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-24 21:43:19,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:19,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878214227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:19,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:19,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 21:43:19,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365731757] [2023-11-24 21:43:19,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:19,397 INFO L87 Difference]: Start difference. First operand 5260 states and 7943 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:23,879 INFO L93 Difference]: Finished difference Result 14274 states and 22312 transitions. [2023-11-24 21:43:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 [2023-11-24 21:43:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:23,928 INFO L225 Difference]: With dead ends: 14274 [2023-11-24 21:43:23,928 INFO L226 Difference]: Without dead ends: 9766 [2023-11-24 21:43:23,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:23,936 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 621 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:23,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 664 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-24 21:43:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9766 states. [2023-11-24 21:43:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9766 to 9766. [2023-11-24 21:43:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9766 states, 9765 states have (on average 1.387916026625704) internal successors, (13553), 9765 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9766 states to 9766 states and 13553 transitions. [2023-11-24 21:43:24,163 INFO L78 Accepts]: Start accepts. Automaton has 9766 states and 13553 transitions. Word has length 170 [2023-11-24 21:43:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:24,165 INFO L495 AbstractCegarLoop]: Abstraction has 9766 states and 13553 transitions. [2023-11-24 21:43:24,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 9766 states and 13553 transitions. [2023-11-24 21:43:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-24 21:43:24,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:24,169 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:24,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:43:24,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:24,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:24,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash 121748127, now seen corresponding path program 1 times [2023-11-24 21:43:24,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:24,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90259787] [2023-11-24 21:43:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:24,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:24,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90259787] [2023-11-24 21:43:24,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90259787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:24,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:24,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158482075] [2023-11-24 21:43:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:24,828 INFO L87 Difference]: Start difference. First operand 9766 states and 13553 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:29,528 INFO L93 Difference]: Finished difference Result 23323 states and 32176 transitions. [2023-11-24 21:43:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:29,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2023-11-24 21:43:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:29,592 INFO L225 Difference]: With dead ends: 23323 [2023-11-24 21:43:29,592 INFO L226 Difference]: Without dead ends: 14272 [2023-11-24 21:43:29,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:29,604 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 702 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:29,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 705 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-24 21:43:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2023-11-24 21:43:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 14272. [2023-11-24 21:43:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 1.2779763156050732) internal successors, (18238), 14271 states have internal predecessors, (18238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 18238 transitions. [2023-11-24 21:43:29,939 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 18238 transitions. Word has length 186 [2023-11-24 21:43:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:29,939 INFO L495 AbstractCegarLoop]: Abstraction has 14272 states and 18238 transitions. [2023-11-24 21:43:29,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 18238 transitions. [2023-11-24 21:43:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-24 21:43:29,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:29,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:29,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:29,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:43:29,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:29,947 INFO L85 PathProgramCache]: Analyzing trace with hash -697443418, now seen corresponding path program 1 times [2023-11-24 21:43:29,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:29,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413543860] [2023-11-24 21:43:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:29,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 41 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:30,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:30,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413543860] [2023-11-24 21:43:30,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413543860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:30,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328640823] [2023-11-24 21:43:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:30,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:30,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:30,929 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:30,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722f68af-aa2a-42d5-be93-efd7f4b46814/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:43:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:31,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:43:31,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-24 21:43:31,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:43:31,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328640823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:31,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:43:31,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-24 21:43:31,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618956030] [2023-11-24 21:43:31,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:31,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:31,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:43:31,212 INFO L87 Difference]: Start difference. First operand 14272 states and 18238 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)