./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/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_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/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_a7c8a8f5-bb00-4379-afed-0430cb7d7512/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 79b7ed930517f0c303520f60ebdea461202c3431ddfaa74076064178b3e4d861 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:03:18,833 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:03:18,985 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:03:18,995 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:03:18,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:03:19,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:03:19,043 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:03:19,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:03:19,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:03:19,050 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:03:19,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:03:19,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:03:19,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:03:19,054 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:03:19,054 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:03:19,055 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:03:19,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:03:19,056 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:03:19,056 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:03:19,057 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:03:19,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:03:19,059 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:03:19,060 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:03:19,060 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:03:19,061 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:03:19,061 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:03:19,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:03:19,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:03:19,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:03:19,063 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:03:19,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:03:19,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:19,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:03:19,066 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:03:19,066 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:03:19,066 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:03:19,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:03:19,066 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:03:19,067 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:03:19,067 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:03:19,067 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:03:19,068 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:03:19,068 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_a7c8a8f5-bb00-4379-afed-0430cb7d7512/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79b7ed930517f0c303520f60ebdea461202c3431ddfaa74076064178b3e4d861 [2023-11-24 22:03:19,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:03:19,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:03:19,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:03:19,496 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:03:19,496 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:03:19,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem14_label40.c [2023-11-24 22:03:22,799 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:03:23,187 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:03:23,190 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/sv-benchmarks/c/eca-rers2012/Problem14_label40.c [2023-11-24 22:03:23,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/data/390cf1391/89a685347b4c4d8d9f45d1ccb1ac386c/FLAG040253e90 [2023-11-24 22:03:23,237 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/data/390cf1391/89a685347b4c4d8d9f45d1ccb1ac386c [2023-11-24 22:03:23,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:03:23,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:03:23,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:23,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:03:23,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:03:23,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:23" (1/1) ... [2023-11-24 22:03:23,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9eb2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:23, skipping insertion in model container [2023-11-24 22:03:23,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:23" (1/1) ... [2023-11-24 22:03:23,353 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:03:23,669 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_a7c8a8f5-bb00-4379-afed-0430cb7d7512/sv-benchmarks/c/eca-rers2012/Problem14_label40.c[2182,2195] [2023-11-24 22:03:24,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:24,024 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:03:24,065 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_a7c8a8f5-bb00-4379-afed-0430cb7d7512/sv-benchmarks/c/eca-rers2012/Problem14_label40.c[2182,2195] [2023-11-24 22:03:24,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:24,241 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:03:24,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24 WrapperNode [2023-11-24 22:03:24,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:24,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:24,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:03:24,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:03:24,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,393 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-11-24 22:03:24,394 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:24,395 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:03:24,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:03:24,395 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:03:24,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,420 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,455 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 22:03:24,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,455 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,492 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,498 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,507 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:03:24,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:03:24,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:03:24,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:03:24,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (1/1) ... [2023-11-24 22:03:24,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:24,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:24,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:03:24,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:03:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:03:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:03:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:03:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:03:24,697 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:03:24,699 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:03:26,206 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:03:26,256 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:03:26,256 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:03:26,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:26 BoogieIcfgContainer [2023-11-24 22:03:26,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:03:26,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:03:26,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:03:26,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:03:26,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:03:23" (1/3) ... [2023-11-24 22:03:26,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9febe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:26, skipping insertion in model container [2023-11-24 22:03:26,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:24" (2/3) ... [2023-11-24 22:03:26,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9febe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:26, skipping insertion in model container [2023-11-24 22:03:26,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:26" (3/3) ... [2023-11-24 22:03:26,267 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label40.c [2023-11-24 22:03:26,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:03:26,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:03:26,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:03:26,352 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;@51b03615, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:03:26,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:03:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 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 22:03:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 22:03:26,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:26,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:26,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:26,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:26,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1794323258, now seen corresponding path program 1 times [2023-11-24 22:03:26,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:26,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979447968] [2023-11-24 22:03:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:26,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:26,534 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 22:03:26,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:26,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979447968] [2023-11-24 22:03:26,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979447968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:26,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:26,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:03:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686207463] [2023-11-24 22:03:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:26,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:03:26,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:03:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:03:26,582 INFO L87 Difference]: Start difference. First operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:26,634 INFO L93 Difference]: Finished difference Result 365 states and 719 transitions. [2023-11-24 22:03:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:03:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 22:03:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:26,650 INFO L225 Difference]: With dead ends: 365 [2023-11-24 22:03:26,651 INFO L226 Difference]: Without dead ends: 181 [2023-11-24 22:03:26,655 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 22:03:26,659 INFO L413 NwaCegarLoop]: 295 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, 295 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 22:03:26,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-24 22:03:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-24 22:03:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 0 states have call successors, (0), 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 22:03:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-24 22:03:26,739 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 18 [2023-11-24 22:03:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:26,740 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-24 22:03:26,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-24 22:03:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 22:03:26,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:26,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:03:26,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:26,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash 325144876, now seen corresponding path program 1 times [2023-11-24 22:03:26,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:26,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325331547] [2023-11-24 22:03:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:26,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:26,958 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 22:03:26,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325331547] [2023-11-24 22:03:26,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325331547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:26,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:26,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:03:26,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088726346] [2023-11-24 22:03:26,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:26,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:26,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:26,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:26,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:26,964 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:27,996 INFO L93 Difference]: Finished difference Result 361 states and 589 transitions. [2023-11-24 22:03:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:27,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 22:03:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:28,001 INFO L225 Difference]: With dead ends: 361 [2023-11-24 22:03:28,002 INFO L226 Difference]: Without dead ends: 359 [2023-11-24 22:03:28,003 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 22:03:28,004 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:28,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 10 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 22:03:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-24 22:03:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-24 22:03:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.6396648044692737) internal successors, (587), 358 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:03:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 587 transitions. [2023-11-24 22:03:28,057 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 587 transitions. Word has length 18 [2023-11-24 22:03:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:28,057 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 587 transitions. [2023-11-24 22:03:28,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 587 transitions. [2023-11-24 22:03:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-24 22:03:28,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:28,062 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:03:28,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:03:28,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:28,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1570100031, now seen corresponding path program 1 times [2023-11-24 22:03:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:28,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674204228] [2023-11-24 22:03:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:28,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:28,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:28,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674204228] [2023-11-24 22:03:28,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674204228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:28,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:28,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:03:28,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012869038] [2023-11-24 22:03:28,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:28,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:28,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:28,367 INFO L87 Difference]: Start difference. First operand 359 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:29,424 INFO L93 Difference]: Finished difference Result 1075 states and 1759 transitions. [2023-11-24 22:03:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 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) Word has length 83 [2023-11-24 22:03:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:29,430 INFO L225 Difference]: With dead ends: 1075 [2023-11-24 22:03:29,430 INFO L226 Difference]: Without dead ends: 717 [2023-11-24 22:03:29,433 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 22:03:29,435 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:29,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 86 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 22:03:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-24 22:03:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2023-11-24 22:03:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.42296918767507) internal successors, (1016), 714 states have internal predecessors, (1016), 0 states have call successors, (0), 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 22:03:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1016 transitions. [2023-11-24 22:03:29,469 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1016 transitions. Word has length 83 [2023-11-24 22:03:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:29,470 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 1016 transitions. [2023-11-24 22:03:29,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1016 transitions. [2023-11-24 22:03:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-24 22:03:29,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:29,475 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:03:29,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:03:29,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:29,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1198596068, now seen corresponding path program 1 times [2023-11-24 22:03:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:29,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366159041] [2023-11-24 22:03:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:29,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366159041] [2023-11-24 22:03:29,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366159041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:29,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:03:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723356047] [2023-11-24 22:03:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:29,643 INFO L87 Difference]: Start difference. First operand 715 states and 1016 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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) [2023-11-24 22:03:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:30,643 INFO L93 Difference]: Finished difference Result 1607 states and 2323 transitions. [2023-11-24 22:03:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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) Word has length 84 [2023-11-24 22:03:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:30,654 INFO L225 Difference]: With dead ends: 1607 [2023-11-24 22:03:30,654 INFO L226 Difference]: Without dead ends: 893 [2023-11-24 22:03:30,656 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 22:03:30,658 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 125 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:30,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 55 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 22:03:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-11-24 22:03:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2023-11-24 22:03:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3318385650224216) internal successors, (1188), 892 states have internal predecessors, (1188), 0 states have call successors, (0), 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 22:03:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1188 transitions. [2023-11-24 22:03:30,700 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1188 transitions. Word has length 84 [2023-11-24 22:03:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:30,701 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1188 transitions. [2023-11-24 22:03:30,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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) [2023-11-24 22:03:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1188 transitions. [2023-11-24 22:03:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-24 22:03:30,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:30,706 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:03:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:03:30,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:30,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1208708853, now seen corresponding path program 1 times [2023-11-24 22:03:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158141274] [2023-11-24 22:03:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:30,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:31,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158141274] [2023-11-24 22:03:31,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158141274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:31,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:31,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:31,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683311848] [2023-11-24 22:03:31,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:31,063 INFO L87 Difference]: Start difference. First operand 893 states and 1188 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:32,559 INFO L93 Difference]: Finished difference Result 2143 states and 2781 transitions. [2023-11-24 22:03:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:32,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 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 87 [2023-11-24 22:03:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:32,572 INFO L225 Difference]: With dead ends: 2143 [2023-11-24 22:03:32,572 INFO L226 Difference]: Without dead ends: 1251 [2023-11-24 22:03:32,574 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 22:03:32,585 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 440 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:32,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 121 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-24 22:03:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-11-24 22:03:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2023-11-24 22:03:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.2572115384615385) internal successors, (1569), 1248 states have internal predecessors, (1569), 0 states have call successors, (0), 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 22:03:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1569 transitions. [2023-11-24 22:03:32,648 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1569 transitions. Word has length 87 [2023-11-24 22:03:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:32,651 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1569 transitions. [2023-11-24 22:03:32,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1569 transitions. [2023-11-24 22:03:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 22:03:32,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:32,664 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:03:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:03:32,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:32,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1888943553, now seen corresponding path program 1 times [2023-11-24 22:03:32,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:32,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318421278] [2023-11-24 22:03:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:32,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:32,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:32,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318421278] [2023-11-24 22:03:32,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318421278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:32,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:32,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511153013] [2023-11-24 22:03:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:32,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:32,898 INFO L87 Difference]: Start difference. First operand 1249 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:33,797 INFO L93 Difference]: Finished difference Result 2853 states and 3585 transitions. [2023-11-24 22:03:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:33,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2023-11-24 22:03:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:33,808 INFO L225 Difference]: With dead ends: 2853 [2023-11-24 22:03:33,808 INFO L226 Difference]: Without dead ends: 1427 [2023-11-24 22:03:33,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:33,812 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:33,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 294 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 22:03:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-11-24 22:03:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1249. [2023-11-24 22:03:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.2467948717948718) internal successors, (1556), 1248 states have internal predecessors, (1556), 0 states have call successors, (0), 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 22:03:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1556 transitions. [2023-11-24 22:03:33,873 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1556 transitions. Word has length 98 [2023-11-24 22:03:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:33,874 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1556 transitions. [2023-11-24 22:03:33,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:03:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1556 transitions. [2023-11-24 22:03:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-24 22:03:33,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:33,878 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:33,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:03:33,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:33,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash 506897489, now seen corresponding path program 1 times [2023-11-24 22:03:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:33,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883556507] [2023-11-24 22:03:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:33,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:34,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883556507] [2023-11-24 22:03:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883556507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:34,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:34,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:34,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492611080] [2023-11-24 22:03:34,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:34,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:34,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:34,211 INFO L87 Difference]: Start difference. First operand 1249 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 22:03:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:35,272 INFO L93 Difference]: Finished difference Result 2350 states and 2951 transitions. [2023-11-24 22:03:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2023-11-24 22:03:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:35,282 INFO L225 Difference]: With dead ends: 2350 [2023-11-24 22:03:35,283 INFO L226 Difference]: Without dead ends: 1251 [2023-11-24 22:03:35,285 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 22:03:35,287 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 112 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:35,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 117 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 22:03:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-11-24 22:03:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2023-11-24 22:03:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.1290064102564104) internal successors, (1409), 1248 states have internal predecessors, (1409), 0 states have call successors, (0), 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 22:03:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1409 transitions. [2023-11-24 22:03:35,329 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1409 transitions. Word has length 177 [2023-11-24 22:03:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:35,331 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1409 transitions. [2023-11-24 22:03:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 22:03:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1409 transitions. [2023-11-24 22:03:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-24 22:03:35,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:35,338 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-24 22:03:35,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:03:35,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:35,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash -945727957, now seen corresponding path program 1 times [2023-11-24 22:03:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:35,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913621545] [2023-11-24 22:03:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:03:35,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:35,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913621545] [2023-11-24 22:03:35,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913621545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:35,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:35,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:35,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981258027] [2023-11-24 22:03:35,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:35,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:35,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:35,796 INFO L87 Difference]: Start difference. First operand 1249 states and 1409 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 22:03:36,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:36,623 INFO L93 Difference]: Finished difference Result 3209 states and 3681 transitions. [2023-11-24 22:03:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 [2023-11-24 22:03:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:36,635 INFO L225 Difference]: With dead ends: 3209 [2023-11-24 22:03:36,635 INFO L226 Difference]: Without dead ends: 1961 [2023-11-24 22:03:36,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:36,638 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:36,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 73 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 22:03:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-24 22:03:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1961. [2023-11-24 22:03:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.1076530612244897) internal successors, (2171), 1960 states have internal predecessors, (2171), 0 states have call successors, (0), 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 22:03:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2171 transitions. [2023-11-24 22:03:36,695 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2171 transitions. Word has length 202 [2023-11-24 22:03:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:36,696 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2171 transitions. [2023-11-24 22:03:36,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 22:03:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2171 transitions. [2023-11-24 22:03:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-11-24 22:03:36,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:36,705 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:36,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:03:36,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:36,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash -36189684, now seen corresponding path program 1 times [2023-11-24 22:03:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695623971] [2023-11-24 22:03:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-24 22:03:37,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:37,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695623971] [2023-11-24 22:03:37,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695623971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:37,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:37,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:37,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047738981] [2023-11-24 22:03:37,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:37,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:37,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:37,432 INFO L87 Difference]: Start difference. First operand 1961 states and 2171 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 22:03:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:38,343 INFO L93 Difference]: Finished difference Result 3772 states and 4194 transitions. [2023-11-24 22:03:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 388 [2023-11-24 22:03:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:38,357 INFO L225 Difference]: With dead ends: 3772 [2023-11-24 22:03:38,358 INFO L226 Difference]: Without dead ends: 2139 [2023-11-24 22:03:38,360 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 22:03:38,361 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:38,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 14 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 22:03:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-24 22:03:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1961. [2023-11-24 22:03:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.073469387755102) internal successors, (2104), 1960 states have internal predecessors, (2104), 0 states have call successors, (0), 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 22:03:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2104 transitions. [2023-11-24 22:03:38,421 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2104 transitions. Word has length 388 [2023-11-24 22:03:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:38,423 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2104 transitions. [2023-11-24 22:03:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 22:03:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2104 transitions. [2023-11-24 22:03:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-11-24 22:03:38,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:38,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2023-11-24 22:03:38,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:03:38,433 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:38,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1487562219, now seen corresponding path program 1 times [2023-11-24 22:03:38,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:38,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23966025] [2023-11-24 22:03:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:38,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 317 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-24 22:03:39,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:39,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23966025] [2023-11-24 22:03:39,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23966025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:39,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426378690] [2023-11-24 22:03:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:39,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:39,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:39,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:03:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:39,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:03:39,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-24 22:03:40,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:40,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426378690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:40,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:40,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-24 22:03:40,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307399886] [2023-11-24 22:03:40,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:40,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:40,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:40,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:03:40,102 INFO L87 Difference]: Start difference. First operand 1961 states and 2104 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 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) [2023-11-24 22:03:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:40,718 INFO L93 Difference]: Finished difference Result 3743 states and 4050 transitions. [2023-11-24 22:03:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 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 414 [2023-11-24 22:03:40,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:40,731 INFO L225 Difference]: With dead ends: 3743 [2023-11-24 22:03:40,732 INFO L226 Difference]: Without dead ends: 2139 [2023-11-24 22:03:40,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:03:40,735 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:40,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 242 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-24 22:03:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1961. [2023-11-24 22:03:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.073469387755102) internal successors, (2104), 1960 states have internal predecessors, (2104), 0 states have call successors, (0), 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 22:03:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2104 transitions. [2023-11-24 22:03:40,791 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2104 transitions. Word has length 414 [2023-11-24 22:03:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:40,792 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2104 transitions. [2023-11-24 22:03:40,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 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) [2023-11-24 22:03:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2104 transitions. [2023-11-24 22:03:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2023-11-24 22:03:40,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:40,802 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 22:03:40,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:41,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:03:41,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:41,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1873790903, now seen corresponding path program 1 times [2023-11-24 22:03:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:41,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912922589] [2023-11-24 22:03:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:41,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 321 proven. 18 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 22:03:41,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:41,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912922589] [2023-11-24 22:03:41,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912922589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:41,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053482277] [2023-11-24 22:03:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:41,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:41,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:41,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:41,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:03:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:41,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:03:42,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2023-11-24 22:03:42,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:42,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053482277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:42,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:42,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 22:03:42,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633530960] [2023-11-24 22:03:42,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:42,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:42,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:42,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:42,055 INFO L87 Difference]: Start difference. First operand 1961 states and 2104 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 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) [2023-11-24 22:03:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:42,729 INFO L93 Difference]: Finished difference Result 4099 states and 4486 transitions. [2023-11-24 22:03:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 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 426 [2023-11-24 22:03:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:42,743 INFO L225 Difference]: With dead ends: 4099 [2023-11-24 22:03:42,743 INFO L226 Difference]: Without dead ends: 2495 [2023-11-24 22:03:42,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:42,747 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:42,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 242 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-11-24 22:03:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2139. [2023-11-24 22:03:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 1.0818521983161833) internal successors, (2313), 2138 states have internal predecessors, (2313), 0 states have call successors, (0), 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 22:03:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 2313 transitions. [2023-11-24 22:03:42,797 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 2313 transitions. Word has length 426 [2023-11-24 22:03:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:42,798 INFO L495 AbstractCegarLoop]: Abstraction has 2139 states and 2313 transitions. [2023-11-24 22:03:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 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) [2023-11-24 22:03:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 2313 transitions. [2023-11-24 22:03:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-24 22:03:42,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:42,813 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:42,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:43,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 22:03:43,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:43,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1885681238, now seen corresponding path program 1 times [2023-11-24 22:03:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:43,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98029826] [2023-11-24 22:03:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:43,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 699 proven. 11 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-24 22:03:43,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98029826] [2023-11-24 22:03:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98029826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510549218] [2023-11-24 22:03:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:43,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:43,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:03:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:44,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:03:44,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2023-11-24 22:03:44,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510549218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:44,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:44,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 22:03:44,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217605707] [2023-11-24 22:03:44,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:44,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:44,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:44,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:44,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:44,219 INFO L87 Difference]: Start difference. First operand 2139 states and 2313 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2023-11-24 22:03:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:44,867 INFO L93 Difference]: Finished difference Result 4811 states and 5265 transitions. [2023-11-24 22:03:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:44,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 525 [2023-11-24 22:03:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:44,883 INFO L225 Difference]: With dead ends: 4811 [2023-11-24 22:03:44,883 INFO L226 Difference]: Without dead ends: 2851 [2023-11-24 22:03:44,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:44,886 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:44,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 230 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2023-11-24 22:03:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2495. [2023-11-24 22:03:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.0842020850040097) internal successors, (2704), 2494 states have internal predecessors, (2704), 0 states have call successors, (0), 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 22:03:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2704 transitions. [2023-11-24 22:03:44,957 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2704 transitions. Word has length 525 [2023-11-24 22:03:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:44,959 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 2704 transitions. [2023-11-24 22:03:44,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2023-11-24 22:03:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2704 transitions. [2023-11-24 22:03:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-24 22:03:44,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:44,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:44,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:45,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 22:03:45,182 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:45,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash -22417399, now seen corresponding path program 1 times [2023-11-24 22:03:45,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:45,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637505520] [2023-11-24 22:03:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 775 proven. 11 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-24 22:03:46,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:46,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637505520] [2023-11-24 22:03:46,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637505520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:46,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377028718] [2023-11-24 22:03:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:46,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:46,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:46,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:03:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:46,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:03:46,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2023-11-24 22:03:46,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:46,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377028718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:46,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:46,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 22:03:46,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140885813] [2023-11-24 22:03:46,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:46,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:46,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:46,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:46,492 INFO L87 Difference]: Start difference. First operand 2495 states and 2704 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2023-11-24 22:03:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:47,094 INFO L93 Difference]: Finished difference Result 4811 states and 5232 transitions. [2023-11-24 22:03:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 544 [2023-11-24 22:03:47,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:47,109 INFO L225 Difference]: With dead ends: 4811 [2023-11-24 22:03:47,109 INFO L226 Difference]: Without dead ends: 2673 [2023-11-24 22:03:47,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:47,113 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 165 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:47,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 190 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2023-11-24 22:03:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2317. [2023-11-24 22:03:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.079447322970639) internal successors, (2500), 2316 states have internal predecessors, (2500), 0 states have call successors, (0), 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 22:03:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2500 transitions. [2023-11-24 22:03:47,166 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2500 transitions. Word has length 544 [2023-11-24 22:03:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:47,168 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 2500 transitions. [2023-11-24 22:03:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2023-11-24 22:03:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2500 transitions. [2023-11-24 22:03:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2023-11-24 22:03:47,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:47,175 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:47,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 22:03:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 22:03:47,382 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:47,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1722652532, now seen corresponding path program 1 times [2023-11-24 22:03:47,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:47,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873992180] [2023-11-24 22:03:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 796 proven. 11 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-24 22:03:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:48,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873992180] [2023-11-24 22:03:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873992180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:48,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895463737] [2023-11-24 22:03:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:48,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:48,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:48,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:48,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:03:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:48,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:03:48,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2023-11-24 22:03:49,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:49,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895463737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:49,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:49,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 22:03:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002249230] [2023-11-24 22:03:49,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:49,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:49,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:49,163 INFO L87 Difference]: Start difference. First operand 2317 states and 2500 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 22:03:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:49,768 INFO L93 Difference]: Finished difference Result 4811 states and 5221 transitions. [2023-11-24 22:03:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:49,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 558 [2023-11-24 22:03:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:49,783 INFO L225 Difference]: With dead ends: 4811 [2023-11-24 22:03:49,784 INFO L226 Difference]: Without dead ends: 2851 [2023-11-24 22:03:49,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:49,787 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:49,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 46 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2023-11-24 22:03:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2851. [2023-11-24 22:03:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 1.075438596491228) internal successors, (3065), 2850 states have internal predecessors, (3065), 0 states have call successors, (0), 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 22:03:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 3065 transitions. [2023-11-24 22:03:49,852 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 3065 transitions. Word has length 558 [2023-11-24 22:03:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:49,853 INFO L495 AbstractCegarLoop]: Abstraction has 2851 states and 3065 transitions. [2023-11-24 22:03:49,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 22:03:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 3065 transitions. [2023-11-24 22:03:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2023-11-24 22:03:49,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:49,861 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:49,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:50,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 22:03:50,069 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:50,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1796503329, now seen corresponding path program 1 times [2023-11-24 22:03:50,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:50,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692422976] [2023-11-24 22:03:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 1043 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-11-24 22:03:50,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:50,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692422976] [2023-11-24 22:03:50,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692422976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:50,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:50,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123512216] [2023-11-24 22:03:50,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:50,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:50,899 INFO L87 Difference]: Start difference. First operand 2851 states and 3065 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 22:03:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:51,499 INFO L93 Difference]: Finished difference Result 5701 states and 6158 transitions. [2023-11-24 22:03:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 627 [2023-11-24 22:03:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:51,516 INFO L225 Difference]: With dead ends: 5701 [2023-11-24 22:03:51,516 INFO L226 Difference]: Without dead ends: 3207 [2023-11-24 22:03:51,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:51,520 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:51,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 240 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2023-11-24 22:03:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3029. [2023-11-24 22:03:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 1.071664464993395) internal successors, (3245), 3028 states have internal predecessors, (3245), 0 states have call successors, (0), 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 22:03:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3245 transitions. [2023-11-24 22:03:51,581 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3245 transitions. Word has length 627 [2023-11-24 22:03:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:51,582 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 3245 transitions. [2023-11-24 22:03:51,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 22:03:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3245 transitions. [2023-11-24 22:03:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2023-11-24 22:03:51,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:51,591 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-24 22:03:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 22:03:51,591 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:51,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1694781986, now seen corresponding path program 1 times [2023-11-24 22:03:51,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:51,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354207444] [2023-11-24 22:03:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 828 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-24 22:03:52,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354207444] [2023-11-24 22:03:52,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354207444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:52,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:52,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:52,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915764606] [2023-11-24 22:03:52,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:52,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:52,062 INFO L87 Difference]: Start difference. First operand 3029 states and 3245 transitions. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 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) [2023-11-24 22:03:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:52,681 INFO L93 Difference]: Finished difference Result 6947 states and 7497 transitions. [2023-11-24 22:03:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:52,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 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) Word has length 632 [2023-11-24 22:03:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:52,711 INFO L225 Difference]: With dead ends: 6947 [2023-11-24 22:03:52,711 INFO L226 Difference]: Without dead ends: 4097 [2023-11-24 22:03:52,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:52,716 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:52,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2023-11-24 22:03:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3919. [2023-11-24 22:03:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.071465033180194) internal successors, (4198), 3918 states have internal predecessors, (4198), 0 states have call successors, (0), 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 22:03:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4198 transitions. [2023-11-24 22:03:52,802 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4198 transitions. Word has length 632 [2023-11-24 22:03:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:52,804 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4198 transitions. [2023-11-24 22:03:52,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 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) [2023-11-24 22:03:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4198 transitions. [2023-11-24 22:03:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2023-11-24 22:03:52,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:52,813 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:52,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 22:03:52,813 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:52,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1663360338, now seen corresponding path program 1 times [2023-11-24 22:03:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:52,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773042307] [2023-11-24 22:03:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1508 backedges. 1052 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-11-24 22:03:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773042307] [2023-11-24 22:03:53,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773042307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:53,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625722317] [2023-11-24 22:03:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:53,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:53,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:53,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:53,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:53,442 INFO L87 Difference]: Start difference. First operand 3919 states and 4198 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 22:03:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:54,209 INFO L93 Difference]: Finished difference Result 8193 states and 8831 transitions. [2023-11-24 22:03:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 634 [2023-11-24 22:03:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:54,225 INFO L225 Difference]: With dead ends: 8193 [2023-11-24 22:03:54,225 INFO L226 Difference]: Without dead ends: 4275 [2023-11-24 22:03:54,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:54,231 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 112 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:54,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 199 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 22:03:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-11-24 22:03:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3919. [2023-11-24 22:03:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.0592138846350179) internal successors, (4150), 3918 states have internal predecessors, (4150), 0 states have call successors, (0), 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 22:03:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4150 transitions. [2023-11-24 22:03:54,317 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4150 transitions. Word has length 634 [2023-11-24 22:03:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:54,318 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4150 transitions. [2023-11-24 22:03:54,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 22:03:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4150 transitions. [2023-11-24 22:03:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2023-11-24 22:03:54,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:54,362 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:54,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 22:03:54,363 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:54,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2027369839, now seen corresponding path program 1 times [2023-11-24 22:03:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340974291] [2023-11-24 22:03:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 1453 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-11-24 22:03:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340974291] [2023-11-24 22:03:55,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340974291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:55,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:55,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484335189] [2023-11-24 22:03:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:55,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:55,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:55,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:55,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:55,126 INFO L87 Difference]: Start difference. First operand 3919 states and 4150 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 22:03:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:55,760 INFO L93 Difference]: Finished difference Result 7837 states and 8303 transitions. [2023-11-24 22:03:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 711 [2023-11-24 22:03:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:55,776 INFO L225 Difference]: With dead ends: 7837 [2023-11-24 22:03:55,776 INFO L226 Difference]: Without dead ends: 3919 [2023-11-24 22:03:55,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:55,784 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:55,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 230 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:03:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2023-11-24 22:03:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3919. [2023-11-24 22:03:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.0533435426237876) internal successors, (4127), 3918 states have internal predecessors, (4127), 0 states have call successors, (0), 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 22:03:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4127 transitions. [2023-11-24 22:03:55,873 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4127 transitions. Word has length 711 [2023-11-24 22:03:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:55,874 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4127 transitions. [2023-11-24 22:03:55,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 22:03:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4127 transitions. [2023-11-24 22:03:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2023-11-24 22:03:55,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:55,893 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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 22:03:55,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 22:03:55,893 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:55,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash 690220388, now seen corresponding path program 1 times [2023-11-24 22:03:55,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765561258] [2023-11-24 22:03:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 1283 proven. 155 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-24 22:03:56,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765561258] [2023-11-24 22:03:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765561258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696735535] [2023-11-24 22:03:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:56,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:56,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:56,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:03:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:57,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:03:57,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 1283 proven. 155 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-24 22:03:57,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 1283 proven. 155 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-24 22:03:58,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696735535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:58,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:58,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-24 22:03:58,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511724857] [2023-11-24 22:03:58,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:58,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:03:58,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:58,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:03:58,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:58,023 INFO L87 Difference]: Start difference. First operand 3919 states and 4127 transitions. Second operand has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 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 22:03:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:59,204 INFO L93 Difference]: Finished difference Result 8905 states and 9395 transitions. [2023-11-24 22:03:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:03:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 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 787 [2023-11-24 22:03:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:59,216 INFO L225 Difference]: With dead ends: 8905 [2023-11-24 22:03:59,216 INFO L226 Difference]: Without dead ends: 5165 [2023-11-24 22:03:59,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1572 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:59,221 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:59,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 22:03:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2023-11-24 22:03:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4453. [2023-11-24 22:03:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 1.0534591194968554) internal successors, (4690), 4452 states have internal predecessors, (4690), 0 states have call successors, (0), 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 22:03:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 4690 transitions. [2023-11-24 22:03:59,304 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 4690 transitions. Word has length 787 [2023-11-24 22:03:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:59,305 INFO L495 AbstractCegarLoop]: Abstraction has 4453 states and 4690 transitions. [2023-11-24 22:03:59,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 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 22:03:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 4690 transitions. [2023-11-24 22:03:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2023-11-24 22:03:59,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:59,338 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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 22:03:59,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:59,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:59,546 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:59,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2114457763, now seen corresponding path program 1 times [2023-11-24 22:03:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881063916] [2023-11-24 22:03:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2217 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-11-24 22:04:00,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881063916] [2023-11-24 22:04:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881063916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:00,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:04:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958813632] [2023-11-24 22:04:00,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:00,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:00,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:00,144 INFO L87 Difference]: Start difference. First operand 4453 states and 4690 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 22:04:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:00,704 INFO L93 Difference]: Finished difference Result 9439 states and 9969 transitions. [2023-11-24 22:04:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 859 [2023-11-24 22:04:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:00,714 INFO L225 Difference]: With dead ends: 9439 [2023-11-24 22:04:00,714 INFO L226 Difference]: Without dead ends: 5165 [2023-11-24 22:04:00,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:00,720 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:00,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 24 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:04:00,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2023-11-24 22:04:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4987. [2023-11-24 22:04:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4986 states have (on average 1.0507420778178902) internal successors, (5239), 4986 states have internal predecessors, (5239), 0 states have call successors, (0), 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 22:04:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 5239 transitions. [2023-11-24 22:04:00,803 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 5239 transitions. Word has length 859 [2023-11-24 22:04:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:00,804 INFO L495 AbstractCegarLoop]: Abstraction has 4987 states and 5239 transitions. [2023-11-24 22:04:00,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 22:04:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 5239 transitions. [2023-11-24 22:04:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2023-11-24 22:04:00,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:00,845 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 22:04:00,846 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:00,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash 750590896, now seen corresponding path program 1 times [2023-11-24 22:04:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:00,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879779931] [2023-11-24 22:04:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 1518 proven. 93 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2023-11-24 22:04:01,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879779931] [2023-11-24 22:04:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879779931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906613001] [2023-11-24 22:04:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:01,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:01,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:01,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:04:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:02,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:04:02,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 1611 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2023-11-24 22:04:02,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:02,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906613001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:02,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:04:02,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 22:04:02,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280474237] [2023-11-24 22:04:02,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:02,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:02,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:04:02,659 INFO L87 Difference]: Start difference. First operand 4987 states and 5239 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 22:04:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:03,192 INFO L93 Difference]: Finished difference Result 9973 states and 10480 transitions. [2023-11-24 22:04:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:03,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 877 [2023-11-24 22:04:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:03,202 INFO L225 Difference]: With dead ends: 9973 [2023-11-24 22:04:03,203 INFO L226 Difference]: Without dead ends: 5165 [2023-11-24 22:04:03,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:04:03,208 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:03,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:04:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2023-11-24 22:04:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4809. [2023-11-24 22:04:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 1.0517886855241265) internal successors, (5057), 4808 states have internal predecessors, (5057), 0 states have call successors, (0), 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 22:04:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 5057 transitions. [2023-11-24 22:04:03,292 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 5057 transitions. Word has length 877 [2023-11-24 22:04:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:03,293 INFO L495 AbstractCegarLoop]: Abstraction has 4809 states and 5057 transitions. [2023-11-24 22:04:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 22:04:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 5057 transitions. [2023-11-24 22:04:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2023-11-24 22:04:03,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:03,306 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:03,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:03,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c8a8f5-bb00-4379-afed-0430cb7d7512/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:03,514 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:03,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash -740749046, now seen corresponding path program 1 times [2023-11-24 22:04:03,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:03,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305996743] [2023-11-24 22:04:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:03,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat