./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU --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 073d0286f7f22cdfd8eea76e89ac58c5da1aee755973b8c9a7ddb0308333499f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:55:37,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:55:37,705 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:55:37,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:55:37,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:55:37,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:55:37,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:55:37,750 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:55:37,751 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:55:37,752 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:55:37,752 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:55:37,753 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:55:37,753 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:55:37,754 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:55:37,754 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:55:37,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:55:37,755 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:55:37,755 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:55:37,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:55:37,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:55:37,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:55:37,761 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:55:37,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:55:37,761 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:55:37,762 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:55:37,762 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:55:37,762 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:55:37,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:55:37,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:55:37,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:55:37,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:55:37,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:55:37,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:37,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:55:37,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:55:37,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:55:37,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:55:37,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:55:37,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:55:37,769 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:55:37,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:55:37,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:55:37,771 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_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 073d0286f7f22cdfd8eea76e89ac58c5da1aee755973b8c9a7ddb0308333499f [2024-10-31 21:55:38,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:55:38,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:55:38,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:55:38,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:55:38,113 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:55:38,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/eca-rers2012/Problem14_label47.c Unable to find full path for "g++" [2024-10-31 21:55:40,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:55:40,537 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:55:40,539 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/sv-benchmarks/c/eca-rers2012/Problem14_label47.c [2024-10-31 21:55:40,559 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/data/e6eaac463/7585a5163dcd492783e6d624158b302c/FLAG801158a28 [2024-10-31 21:55:40,574 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/data/e6eaac463/7585a5163dcd492783e6d624158b302c [2024-10-31 21:55:40,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:55:40,579 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:55:40,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:40,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:55:40,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:55:40,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:40" (1/1) ... [2024-10-31 21:55:40,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0c447b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:40, skipping insertion in model container [2024-10-31 21:55:40,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:40" (1/1) ... [2024-10-31 21:55:40,663 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:55:40,910 WARN L251 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_fe0c4e1d-a9ee-407d-8f68-60584240f173/sv-benchmarks/c/eca-rers2012/Problem14_label47.c[3529,3542] [2024-10-31 21:55:41,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:41,170 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:55:41,189 WARN L251 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_fe0c4e1d-a9ee-407d-8f68-60584240f173/sv-benchmarks/c/eca-rers2012/Problem14_label47.c[3529,3542] [2024-10-31 21:55:41,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:41,350 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:55:41,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41 WrapperNode [2024-10-31 21:55:41,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:41,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:41,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:55:41,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:55:41,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,378 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,505 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2024-10-31 21:55:41,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:41,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:55:41,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:55:41,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:55:41,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,532 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,584 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]. [2024-10-31 21:55:41,584 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,584 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,624 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,645 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,667 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:55:41,671 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:55:41,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:55:41,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:55:41,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (1/1) ... [2024-10-31 21:55:41,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:41,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:55:41,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:55:41,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:55:41,830 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:55:41,832 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:55:43,423 INFO L? ?]: Removed 123 outVars from TransFormulas that were not future-live. [2024-10-31 21:55:43,424 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:55:43,449 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:55:43,452 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 21:55:43,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:43 BoogieIcfgContainer [2024-10-31 21:55:43,453 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:55:43,455 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:55:43,455 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:55:43,460 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:55:43,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:55:40" (1/3) ... [2024-10-31 21:55:43,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b2eb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:43, skipping insertion in model container [2024-10-31 21:55:43,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:41" (2/3) ... [2024-10-31 21:55:43,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b2eb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:43, skipping insertion in model container [2024-10-31 21:55:43,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:43" (3/3) ... [2024-10-31 21:55:43,463 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label47.c [2024-10-31 21:55:43,484 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:55:43,484 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:55:43,573 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:55:43,581 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@4ab02e45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:55:43,585 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:55:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 21:55:43,603 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:43,604 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:43,605 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:43,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2113343065, now seen corresponding path program 1 times [2024-10-31 21:55:43,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:43,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344558448] [2024-10-31 21:55:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:43,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:44,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344558448] [2024-10-31 21:55:44,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344558448] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:44,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:44,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:55:44,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833190755] [2024-10-31 21:55:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:44,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:55:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:44,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:55:44,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:55:44,070 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:45,532 INFO L93 Difference]: Finished difference Result 685 states and 1216 transitions. [2024-10-31 21:55:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:55:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2024-10-31 21:55:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:45,546 INFO L225 Difference]: With dead ends: 685 [2024-10-31 21:55:45,547 INFO L226 Difference]: Without dead ends: 360 [2024-10-31 21:55:45,551 INFO L431 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 [2024-10-31 21:55:45,554 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:45,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 139 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-31 21:55:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-10-31 21:55:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2024-10-31 21:55:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4206128133704736) internal successors, (510), 359 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2024-10-31 21:55:45,614 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 33 [2024-10-31 21:55:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:45,615 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2024-10-31 21:55:45,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2024-10-31 21:55:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-10-31 21:55:45,619 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:45,619 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-10-31 21:55:45,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:55:45,620 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:45,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash 598342279, now seen corresponding path program 1 times [2024-10-31 21:55:45,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:45,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635593231] [2024-10-31 21:55:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:45,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:46,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635593231] [2024-10-31 21:55:46,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635593231] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:46,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:46,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:46,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055833287] [2024-10-31 21:55:46,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:46,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:46,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:46,246 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:47,708 INFO L93 Difference]: Finished difference Result 1074 states and 1446 transitions. [2024-10-31 21:55:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2024-10-31 21:55:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:47,714 INFO L225 Difference]: With dead ends: 1074 [2024-10-31 21:55:47,714 INFO L226 Difference]: Without dead ends: 716 [2024-10-31 21:55:47,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:47,717 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 419 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:47,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 121 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-31 21:55:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2024-10-31 21:55:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2024-10-31 21:55:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.2615384615384615) internal successors, (902), 715 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 902 transitions. [2024-10-31 21:55:47,778 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 902 transitions. Word has length 112 [2024-10-31 21:55:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:47,779 INFO L471 AbstractCegarLoop]: Abstraction has 716 states and 902 transitions. [2024-10-31 21:55:47,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 902 transitions. [2024-10-31 21:55:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-10-31 21:55:47,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:47,784 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:47,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:55:47,785 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:47,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash -508469528, now seen corresponding path program 1 times [2024-10-31 21:55:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:47,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124133867] [2024-10-31 21:55:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:47,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-31 21:55:48,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:48,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124133867] [2024-10-31 21:55:48,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124133867] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:48,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417594232] [2024-10-31 21:55:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:48,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:48,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:48,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:48,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:55:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:48,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:55:48,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-31 21:55:48,809 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:55:48,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417594232] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:48,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:55:48,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2024-10-31 21:55:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958023481] [2024-10-31 21:55:48,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:48,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:55:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:55:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:48,815 INFO L87 Difference]: Start difference. First operand 716 states and 902 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:49,739 INFO L93 Difference]: Finished difference Result 1252 states and 1612 transitions. [2024-10-31 21:55:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:55:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 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 138 [2024-10-31 21:55:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:49,745 INFO L225 Difference]: With dead ends: 1252 [2024-10-31 21:55:49,745 INFO L226 Difference]: Without dead ends: 1250 [2024-10-31 21:55:49,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:49,747 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 91 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:49,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 21:55:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2024-10-31 21:55:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 894. [2024-10-31 21:55:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.3370660694288914) internal successors, (1194), 893 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1194 transitions. [2024-10-31 21:55:49,775 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1194 transitions. Word has length 138 [2024-10-31 21:55:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:49,776 INFO L471 AbstractCegarLoop]: Abstraction has 894 states and 1194 transitions. [2024-10-31 21:55:49,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1194 transitions. [2024-10-31 21:55:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-10-31 21:55:49,780 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:49,781 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:49,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:55:49,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:49,982 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:49,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 215067956, now seen corresponding path program 1 times [2024-10-31 21:55:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:49,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351704614] [2024-10-31 21:55:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:55:50,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:50,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351704614] [2024-10-31 21:55:50,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351704614] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:50,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:50,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493586249] [2024-10-31 21:55:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:50,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:50,350 INFO L87 Difference]: Start difference. First operand 894 states and 1194 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:51,411 INFO L93 Difference]: Finished difference Result 1993 states and 2629 transitions. [2024-10-31 21:55:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2024-10-31 21:55:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:51,417 INFO L225 Difference]: With dead ends: 1993 [2024-10-31 21:55:51,417 INFO L226 Difference]: Without dead ends: 1072 [2024-10-31 21:55:51,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:51,423 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:51,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 121 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-31 21:55:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2024-10-31 21:55:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2024-10-31 21:55:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.1802054154995332) internal successors, (1264), 1071 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1264 transitions. [2024-10-31 21:55:51,447 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1264 transitions. Word has length 192 [2024-10-31 21:55:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:51,447 INFO L471 AbstractCegarLoop]: Abstraction has 1072 states and 1264 transitions. [2024-10-31 21:55:51,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1264 transitions. [2024-10-31 21:55:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2024-10-31 21:55:51,450 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:51,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:51,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:55:51,451 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:51,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1219303416, now seen corresponding path program 1 times [2024-10-31 21:55:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:51,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204258806] [2024-10-31 21:55:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:51,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:51,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204258806] [2024-10-31 21:55:51,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204258806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:51,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889642809] [2024-10-31 21:55:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:51,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:51,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:51,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:51,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:55:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:51,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:55:51,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-10-31 21:55:52,072 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:55:52,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889642809] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:52,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:55:52,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-10-31 21:55:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90466567] [2024-10-31 21:55:52,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:52,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:55:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:55:52,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:55:52,075 INFO L87 Difference]: Start difference. First operand 1072 states and 1264 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:52,835 INFO L93 Difference]: Finished difference Result 2498 states and 3033 transitions. [2024-10-31 21:55:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:55:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 204 [2024-10-31 21:55:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:52,841 INFO L225 Difference]: With dead ends: 2498 [2024-10-31 21:55:52,842 INFO L226 Difference]: Without dead ends: 1428 [2024-10-31 21:55:52,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:55:52,844 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 150 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:52,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 85 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 21:55:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2024-10-31 21:55:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1072. [2024-10-31 21:55:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.1802054154995332) internal successors, (1264), 1071 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1264 transitions. [2024-10-31 21:55:52,873 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1264 transitions. Word has length 204 [2024-10-31 21:55:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:52,874 INFO L471 AbstractCegarLoop]: Abstraction has 1072 states and 1264 transitions. [2024-10-31 21:55:52,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1264 transitions. [2024-10-31 21:55:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-10-31 21:55:52,878 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:52,878 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:52,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:55:53,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:53,080 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:53,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash -994795489, now seen corresponding path program 1 times [2024-10-31 21:55:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:53,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570116778] [2024-10-31 21:55:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:53,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570116778] [2024-10-31 21:55:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570116778] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:53,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:53,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:53,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618684431] [2024-10-31 21:55:53,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:53,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:55:53,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:55:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:55:53,418 INFO L87 Difference]: Start difference. First operand 1072 states and 1264 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:54,180 INFO L93 Difference]: Finished difference Result 2676 states and 3213 transitions. [2024-10-31 21:55:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:55:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2024-10-31 21:55:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:54,186 INFO L225 Difference]: With dead ends: 2676 [2024-10-31 21:55:54,187 INFO L226 Difference]: Without dead ends: 1606 [2024-10-31 21:55:54,188 INFO L431 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 [2024-10-31 21:55:54,191 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:54,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 58 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 21:55:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2024-10-31 21:55:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1428. [2024-10-31 21:55:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.156271899088998) internal successors, (1650), 1427 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1650 transitions. [2024-10-31 21:55:54,225 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1650 transitions. Word has length 207 [2024-10-31 21:55:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:54,225 INFO L471 AbstractCegarLoop]: Abstraction has 1428 states and 1650 transitions. [2024-10-31 21:55:54,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1650 transitions. [2024-10-31 21:55:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2024-10-31 21:55:54,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:54,231 INFO L215 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:54,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 21:55:54,232 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:54,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1450309740, now seen corresponding path program 1 times [2024-10-31 21:55:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:54,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468740325] [2024-10-31 21:55:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:54,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 147 proven. 130 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-10-31 21:55:54,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468740325] [2024-10-31 21:55:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468740325] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343043593] [2024-10-31 21:55:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:54,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:54,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:54,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:54,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:55:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:55,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:55:55,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2024-10-31 21:55:55,617 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:55:55,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343043593] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:55,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:55:55,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-31 21:55:55,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207860229] [2024-10-31 21:55:55,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:55,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:55:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:55:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:55:55,620 INFO L87 Difference]: Start difference. First operand 1428 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:56,360 INFO L93 Difference]: Finished difference Result 3210 states and 3788 transitions. [2024-10-31 21:55:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:55:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 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 326 [2024-10-31 21:55:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:56,367 INFO L225 Difference]: With dead ends: 3210 [2024-10-31 21:55:56,368 INFO L226 Difference]: Without dead ends: 1962 [2024-10-31 21:55:56,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:55:56,370 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:56,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 47 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 21:55:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2024-10-31 21:55:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784. [2024-10-31 21:55:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.1402131239484015) internal successors, (2033), 1783 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2033 transitions. [2024-10-31 21:55:56,405 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2033 transitions. Word has length 326 [2024-10-31 21:55:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:56,406 INFO L471 AbstractCegarLoop]: Abstraction has 1784 states and 2033 transitions. [2024-10-31 21:55:56,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2033 transitions. [2024-10-31 21:55:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2024-10-31 21:55:56,414 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:56,414 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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, 1] [2024-10-31 21:55:56,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 21:55:56,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:56,616 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:56,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash -640505863, now seen corresponding path program 1 times [2024-10-31 21:55:56,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:56,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878068603] [2024-10-31 21:55:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:56,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-10-31 21:55:57,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:57,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878068603] [2024-10-31 21:55:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878068603] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:57,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:57,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:57,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202452841] [2024-10-31 21:55:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:57,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:57,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:57,104 INFO L87 Difference]: Start difference. First operand 1784 states and 2033 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:58,044 INFO L93 Difference]: Finished difference Result 3595 states and 4116 transitions. [2024-10-31 21:55:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 403 [2024-10-31 21:55:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:58,051 INFO L225 Difference]: With dead ends: 3595 [2024-10-31 21:55:58,052 INFO L226 Difference]: Without dead ends: 1962 [2024-10-31 21:55:58,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:58,056 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:58,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 17 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 21:55:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2024-10-31 21:55:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784. [2024-10-31 21:55:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.089736399326977) internal successors, (1943), 1783 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1943 transitions. [2024-10-31 21:55:58,097 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1943 transitions. Word has length 403 [2024-10-31 21:55:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:58,100 INFO L471 AbstractCegarLoop]: Abstraction has 1784 states and 1943 transitions. [2024-10-31 21:55:58,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1943 transitions. [2024-10-31 21:55:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2024-10-31 21:55:58,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:58,109 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:58,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 21:55:58,110 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:58,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1483478618, now seen corresponding path program 1 times [2024-10-31 21:55:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410579941] [2024-10-31 21:55:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:58,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2024-10-31 21:55:58,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:58,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410579941] [2024-10-31 21:55:58,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410579941] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:58,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:58,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:58,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835529136] [2024-10-31 21:55:58,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:58,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:55:58,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:55:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:55:58,690 INFO L87 Difference]: Start difference. First operand 1784 states and 1943 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:55:59,539 INFO L93 Difference]: Finished difference Result 4100 states and 4527 transitions. [2024-10-31 21:55:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:55:59,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 [2024-10-31 21:55:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:55:59,565 INFO L225 Difference]: With dead ends: 4100 [2024-10-31 21:55:59,565 INFO L226 Difference]: Without dead ends: 2496 [2024-10-31 21:55:59,567 INFO L431 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 [2024-10-31 21:55:59,569 INFO L432 NwaCegarLoop]: 198 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 21:55:59,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 202 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 21:55:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2024-10-31 21:55:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2496. [2024-10-31 21:55:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 1.092184368737475) internal successors, (2725), 2495 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 2725 transitions. [2024-10-31 21:55:59,621 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 2725 transitions. Word has length 426 [2024-10-31 21:55:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:55:59,622 INFO L471 AbstractCegarLoop]: Abstraction has 2496 states and 2725 transitions. [2024-10-31 21:55:59,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 2725 transitions. [2024-10-31 21:55:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2024-10-31 21:55:59,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:55:59,633 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:59,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 21:55:59,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:55:59,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:59,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1311069121, now seen corresponding path program 1 times [2024-10-31 21:55:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:59,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689792116] [2024-10-31 21:55:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2024-10-31 21:56:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:00,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689792116] [2024-10-31 21:56:00,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689792116] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:00,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:00,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:56:00,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728634571] [2024-10-31 21:56:00,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:00,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:00,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:00,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:00,047 INFO L87 Difference]: Start difference. First operand 2496 states and 2725 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:00,936 INFO L93 Difference]: Finished difference Result 6058 states and 6693 transitions. [2024-10-31 21:56:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 467 [2024-10-31 21:56:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:00,948 INFO L225 Difference]: With dead ends: 6058 [2024-10-31 21:56:00,948 INFO L226 Difference]: Without dead ends: 3742 [2024-10-31 21:56:00,951 INFO L431 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 [2024-10-31 21:56:00,951 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:00,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 21:56:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2024-10-31 21:56:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3742. [2024-10-31 21:56:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.0828655439722) internal successors, (4051), 3741 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4051 transitions. [2024-10-31 21:56:01,025 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4051 transitions. Word has length 467 [2024-10-31 21:56:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:01,026 INFO L471 AbstractCegarLoop]: Abstraction has 3742 states and 4051 transitions. [2024-10-31 21:56:01,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4051 transitions. [2024-10-31 21:56:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2024-10-31 21:56:01,030 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:01,030 INFO L215 NwaCegarLoop]: trace histogram [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, 5, 5, 5, 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, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:01,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 21:56:01,031 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:01,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2139477517, now seen corresponding path program 1 times [2024-10-31 21:56:01,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:01,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521069701] [2024-10-31 21:56:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:01,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 590 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2024-10-31 21:56:01,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521069701] [2024-10-31 21:56:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521069701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:01,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:56:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172428829] [2024-10-31 21:56:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:01,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:01,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:01,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:01,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:01,580 INFO L87 Difference]: Start difference. First operand 3742 states and 4051 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:02,308 INFO L93 Difference]: Finished difference Result 7304 states and 7921 transitions. [2024-10-31 21:56:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 503 [2024-10-31 21:56:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:02,319 INFO L225 Difference]: With dead ends: 7304 [2024-10-31 21:56:02,319 INFO L226 Difference]: Without dead ends: 3742 [2024-10-31 21:56:02,322 INFO L431 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 [2024-10-31 21:56:02,323 INFO L432 NwaCegarLoop]: 238 mSDtfsCounter, 103 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:02,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 242 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 21:56:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2024-10-31 21:56:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3208. [2024-10-31 21:56:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.078578110383536) internal successors, (3459), 3207 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3459 transitions. [2024-10-31 21:56:02,390 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3459 transitions. Word has length 503 [2024-10-31 21:56:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:02,391 INFO L471 AbstractCegarLoop]: Abstraction has 3208 states and 3459 transitions. [2024-10-31 21:56:02,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3459 transitions. [2024-10-31 21:56:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2024-10-31 21:56:02,397 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:02,397 INFO L215 NwaCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2024-10-31 21:56:02,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 21:56:02,398 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:02,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:02,398 INFO L85 PathProgramCache]: Analyzing trace with hash 801301915, now seen corresponding path program 1 times [2024-10-31 21:56:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:02,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560753323] [2024-10-31 21:56:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:02,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 797 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2024-10-31 21:56:03,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560753323] [2024-10-31 21:56:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560753323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:03,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993018750] [2024-10-31 21:56:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:03,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:03,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:56:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:03,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:56:03,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2024-10-31 21:56:03,337 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993018750] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:03,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:56:03,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 21:56:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195092867] [2024-10-31 21:56:03,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:03,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:03,340 INFO L87 Difference]: Start difference. First operand 3208 states and 3459 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:04,063 INFO L93 Difference]: Finished difference Result 7126 states and 7684 transitions. [2024-10-31 21:56:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:04,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 622 [2024-10-31 21:56:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:04,075 INFO L225 Difference]: With dead ends: 7126 [2024-10-31 21:56:04,075 INFO L226 Difference]: Without dead ends: 3386 [2024-10-31 21:56:04,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:04,080 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 148 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:04,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 241 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 21:56:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2024-10-31 21:56:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3208. [2024-10-31 21:56:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.073277206111631) internal successors, (3442), 3207 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3442 transitions. [2024-10-31 21:56:04,165 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3442 transitions. Word has length 622 [2024-10-31 21:56:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:04,167 INFO L471 AbstractCegarLoop]: Abstraction has 3208 states and 3442 transitions. [2024-10-31 21:56:04,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3442 transitions. [2024-10-31 21:56:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2024-10-31 21:56:04,178 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:04,178 INFO L215 NwaCegarLoop]: trace histogram [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, 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, 4, 3, 3, 3, 3, 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] [2024-10-31 21:56:04,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:56:04,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 21:56:04,390 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:04,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1110604027, now seen corresponding path program 1 times [2024-10-31 21:56:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:04,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771739602] [2024-10-31 21:56:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 1191 proven. 110 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-10-31 21:56:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:05,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771739602] [2024-10-31 21:56:05,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771739602] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:05,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581387301] [2024-10-31 21:56:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:05,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:05,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:05,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:05,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:56:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:05,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:56:05,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2024-10-31 21:56:05,419 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:05,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581387301] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:05,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:56:05,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 21:56:05,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191914145] [2024-10-31 21:56:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:05,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:05,423 INFO L87 Difference]: Start difference. First operand 3208 states and 3442 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:06,001 INFO L93 Difference]: Finished difference Result 6592 states and 7086 transitions. [2024-10-31 21:56:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 701 [2024-10-31 21:56:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:06,012 INFO L225 Difference]: With dead ends: 6592 [2024-10-31 21:56:06,012 INFO L226 Difference]: Without dead ends: 3386 [2024-10-31 21:56:06,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:06,016 INFO L432 NwaCegarLoop]: 231 mSDtfsCounter, 148 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:06,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 236 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 21:56:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2024-10-31 21:56:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3208. [2024-10-31 21:56:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.0673526660430308) internal successors, (3423), 3207 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3423 transitions. [2024-10-31 21:56:06,074 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3423 transitions. Word has length 701 [2024-10-31 21:56:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:06,075 INFO L471 AbstractCegarLoop]: Abstraction has 3208 states and 3423 transitions. [2024-10-31 21:56:06,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3423 transitions. [2024-10-31 21:56:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2024-10-31 21:56:06,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:06,082 INFO L215 NwaCegarLoop]: trace histogram [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, 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, 4, 3, 3, 3, 3, 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] [2024-10-31 21:56:06,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:06,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0c4e1d-a9ee-407d-8f68-60584240f173/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 21:56:06,283 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:06,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1529784803, now seen corresponding path program 1 times [2024-10-31 21:56:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013076098] [2024-10-31 21:56:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat