./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:25:11,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:25:11,831 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:25:11,839 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:25:11,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:25:11,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:25:11,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:25:11,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:25:11,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:25:11,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:25:11,881 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:25:11,882 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:25:11,882 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:25:11,883 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:25:11,884 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:25:11,885 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:25:11,886 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:25:11,904 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:25:11,905 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:25:11,906 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:25:11,907 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:25:11,908 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:25:11,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:25:11,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:25:11,910 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:25:11,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:25:11,911 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:25:11,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:25:11,912 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:25:11,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:25:11,914 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:25:11,914 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:25:11,915 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:25:11,915 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:25:11,916 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:25:11,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:25:11,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:25:11,917 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:25:11,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:25:11,918 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:25:11,919 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:25:11,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:25:11,920 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:25:11,921 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:25:11,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:25:11,921 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 [2023-11-19 05:25:12,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:25:12,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:25:12,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:25:12,335 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:25:12,335 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:25:12,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2023-11-19 05:25:16,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:25:16,630 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:25:16,631 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2023-11-19 05:25:16,684 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/data/87c973862/9a8daca9474d4cb69ea1b7b9d1f95920/FLAGaed5d80ef [2023-11-19 05:25:16,708 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/data/87c973862/9a8daca9474d4cb69ea1b7b9d1f95920 [2023-11-19 05:25:16,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:25:16,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:25:16,718 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:25:16,718 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:25:16,731 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:25:16,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:25:16" (1/1) ... [2023-11-19 05:25:16,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68db111e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:16, skipping insertion in model container [2023-11-19 05:25:16,737 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:25:16" (1/1) ... [2023-11-19 05:25:16,841 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:25:17,336 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2023-11-19 05:25:17,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:25:17,434 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:25:17,444 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-11-19 05:25:17,446 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [408] [2023-11-19 05:25:17,446 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [528] [2023-11-19 05:25:17,447 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [622] [2023-11-19 05:25:17,447 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2141] [2023-11-19 05:25:17,447 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2802] [2023-11-19 05:25:17,447 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2817] [2023-11-19 05:25:17,448 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3004] [2023-11-19 05:25:17,448 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3013] [2023-11-19 05:25:17,448 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3379] [2023-11-19 05:25:17,534 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2023-11-19 05:25:17,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:25:17,581 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:25:17,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17 WrapperNode [2023-11-19 05:25:17,582 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:25:17,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:25:17,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:25:17,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:25:17,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,707 INFO L138 Inliner]: procedures = 90, calls = 345, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 883 [2023-11-19 05:25:17,708 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:25:17,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:25:17,709 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:25:17,709 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:25:17,720 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,756 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,772 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:25:17,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:25:17,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:25:17,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:25:17,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (1/1) ... [2023-11-19 05:25:17,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:25:17,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:17,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:25:17,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:25:18,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:25:18,021 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-19 05:25:18,022 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-19 05:25:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:25:18,022 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:25:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:25:18,023 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:25:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:25:18,024 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:25:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 05:25:18,025 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 05:25:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:25:18,025 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:25:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:25:18,027 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:25:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:25:18,028 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:25:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:25:18,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:25:18,031 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:25:18,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:25:18,032 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:25:18,032 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:25:18,033 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:25:18,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:25:18,034 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:25:18,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:25:18,035 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-19 05:25:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-19 05:25:18,035 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:25:18,035 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:25:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-19 05:25:18,036 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-19 05:25:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:25:18,036 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:25:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:25:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:25:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:25:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:25:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:25:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:25:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:25:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:25:18,038 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:25:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:25:18,038 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:25:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:25:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:25:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:25:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:25:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 05:25:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 05:25:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:25:18,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:25:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:25:18,042 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:25:18,269 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:25:18,272 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:25:19,727 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:25:20,736 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:25:20,736 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:25:20,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:20 BoogieIcfgContainer [2023-11-19 05:25:20,786 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:25:20,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:25:20,789 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:25:20,793 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:25:20,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:25:16" (1/3) ... [2023-11-19 05:25:20,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392b2b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:20, skipping insertion in model container [2023-11-19 05:25:20,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:17" (2/3) ... [2023-11-19 05:25:20,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392b2b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:20, skipping insertion in model container [2023-11-19 05:25:20,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:20" (3/3) ... [2023-11-19 05:25:20,797 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2023-11-19 05:25:20,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:25:20,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:25:20,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:25:20,906 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@466aa968, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:25:20,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:25:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-19 05:25:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 05:25:20,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:20,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:20,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:20,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 908881129, now seen corresponding path program 1 times [2023-11-19 05:25:20,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:20,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972775189] [2023-11-19 05:25:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:20,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:25:22,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972775189] [2023-11-19 05:25:22,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972775189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:22,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:25:22,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:25:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225569326] [2023-11-19 05:25:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:22,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:25:22,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:25:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:25:22,392 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-19 05:25:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:23,857 INFO L93 Difference]: Finished difference Result 1137 states and 1819 transitions. [2023-11-19 05:25:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:25:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2023-11-19 05:25:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:23,883 INFO L225 Difference]: With dead ends: 1137 [2023-11-19 05:25:23,883 INFO L226 Difference]: Without dead ends: 735 [2023-11-19 05:25:23,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:25:23,899 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 520 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:23,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 2828 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:25:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2023-11-19 05:25:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 729. [2023-11-19 05:25:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 489 states have (on average 1.5010224948875255) internal successors, (734), 519 states have internal predecessors, (734), 194 states have call successors, (194), 49 states have call predecessors, (194), 45 states have return successors, (195), 185 states have call predecessors, (195), 190 states have call successors, (195) [2023-11-19 05:25:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1123 transitions. [2023-11-19 05:25:24,077 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1123 transitions. Word has length 75 [2023-11-19 05:25:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:24,078 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 1123 transitions. [2023-11-19 05:25:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-19 05:25:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1123 transitions. [2023-11-19 05:25:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 05:25:24,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:24,087 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:24,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:25:24,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:24,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1761617578, now seen corresponding path program 1 times [2023-11-19 05:25:24,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:24,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377634358] [2023-11-19 05:25:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:24,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:25:24,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377634358] [2023-11-19 05:25:24,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377634358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:24,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:25:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:25:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199430049] [2023-11-19 05:25:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:24,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:25:24,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:25:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:25:24,794 INFO L87 Difference]: Start difference. First operand 729 states and 1123 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:25:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:25,640 INFO L93 Difference]: Finished difference Result 2150 states and 3374 transitions. [2023-11-19 05:25:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:25:25,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 81 [2023-11-19 05:25:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:25,668 INFO L225 Difference]: With dead ends: 2150 [2023-11-19 05:25:25,668 INFO L226 Difference]: Without dead ends: 1433 [2023-11-19 05:25:25,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:25:25,686 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 627 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:25,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 2952 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:25:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2023-11-19 05:25:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1365. [2023-11-19 05:25:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 933 states have (on average 1.504823151125402) internal successors, (1404), 991 states have internal predecessors, (1404), 347 states have call successors, (347), 91 states have call predecessors, (347), 84 states have return successors, (376), 320 states have call predecessors, (376), 341 states have call successors, (376) [2023-11-19 05:25:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2127 transitions. [2023-11-19 05:25:25,894 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2127 transitions. Word has length 81 [2023-11-19 05:25:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:25,895 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2127 transitions. [2023-11-19 05:25:25,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:25:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2127 transitions. [2023-11-19 05:25:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-19 05:25:25,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:25,900 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:25,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:25:25,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:25,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash -503669715, now seen corresponding path program 1 times [2023-11-19 05:25:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714792829] [2023-11-19 05:25:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:25,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:25:26,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714792829] [2023-11-19 05:25:26,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714792829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074616512] [2023-11-19 05:25:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:26,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:26,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:26,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:25:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:26,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:25:26,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:25:26,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:26,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074616512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:26,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:26,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:25:26,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072592446] [2023-11-19 05:25:26,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:26,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:25:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:25:26,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:25:26,981 INFO L87 Difference]: Start difference. First operand 1365 states and 2127 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:25:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:27,404 INFO L93 Difference]: Finished difference Result 3905 states and 6243 transitions. [2023-11-19 05:25:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:25:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 80 [2023-11-19 05:25:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:27,439 INFO L225 Difference]: With dead ends: 3905 [2023-11-19 05:25:27,439 INFO L226 Difference]: Without dead ends: 2552 [2023-11-19 05:25:27,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:25:27,464 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 559 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:27,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1128 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:25:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2023-11-19 05:25:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2477. [2023-11-19 05:25:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 1703 states have (on average 1.5190839694656488) internal successors, (2587), 1819 states have internal predecessors, (2587), 616 states have call successors, (616), 162 states have call predecessors, (616), 157 states have return successors, (696), 571 states have call predecessors, (696), 610 states have call successors, (696) [2023-11-19 05:25:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3899 transitions. [2023-11-19 05:25:27,719 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3899 transitions. Word has length 80 [2023-11-19 05:25:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:27,722 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 3899 transitions. [2023-11-19 05:25:27,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:25:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3899 transitions. [2023-11-19 05:25:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 05:25:27,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:27,730 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:27,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:25:27,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 05:25:27,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:27,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1175448723, now seen corresponding path program 1 times [2023-11-19 05:25:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877090494] [2023-11-19 05:25:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:25:28,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877090494] [2023-11-19 05:25:28,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877090494] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854706636] [2023-11-19 05:25:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:28,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:28,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:28,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:25:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:29,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:25:29,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:25:29,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854706636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:29,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:29,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:25:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906086933] [2023-11-19 05:25:29,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:29,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:25:29,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:29,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:25:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:25:29,152 INFO L87 Difference]: Start difference. First operand 2477 states and 3899 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:25:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:29,643 INFO L93 Difference]: Finished difference Result 5564 states and 8852 transitions. [2023-11-19 05:25:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:25:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2023-11-19 05:25:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:29,680 INFO L225 Difference]: With dead ends: 5564 [2023-11-19 05:25:29,680 INFO L226 Difference]: Without dead ends: 3099 [2023-11-19 05:25:29,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:25:29,707 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 556 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:29,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1091 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:25:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2023-11-19 05:25:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 3056. [2023-11-19 05:25:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 2109 states have (on average 1.530583214793741) internal successors, (3228), 2254 states have internal predecessors, (3228), 753 states have call successors, (753), 196 states have call predecessors, (753), 193 states have return successors, (852), 701 states have call predecessors, (852), 747 states have call successors, (852) [2023-11-19 05:25:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4833 transitions. [2023-11-19 05:25:29,990 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4833 transitions. Word has length 81 [2023-11-19 05:25:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:29,991 INFO L495 AbstractCegarLoop]: Abstraction has 3056 states and 4833 transitions. [2023-11-19 05:25:29,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:25:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4833 transitions. [2023-11-19 05:25:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 05:25:29,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:29,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:30,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:30,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:30,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:30,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1566525700, now seen corresponding path program 1 times [2023-11-19 05:25:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76200254] [2023-11-19 05:25:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:25:31,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76200254] [2023-11-19 05:25:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76200254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229825059] [2023-11-19 05:25:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:31,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:31,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:31,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:31,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:25:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:31,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:25:31,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:25:31,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:31,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229825059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:31,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-19 05:25:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814540468] [2023-11-19 05:25:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:31,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:25:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:25:31,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:25:31,819 INFO L87 Difference]: Start difference. First operand 3056 states and 4833 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:25:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:32,608 INFO L93 Difference]: Finished difference Result 6115 states and 9888 transitions. [2023-11-19 05:25:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:25:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2023-11-19 05:25:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:32,661 INFO L225 Difference]: With dead ends: 6115 [2023-11-19 05:25:32,661 INFO L226 Difference]: Without dead ends: 3876 [2023-11-19 05:25:32,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:32,690 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:32,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2387 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:25:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2023-11-19 05:25:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 3459. [2023-11-19 05:25:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 2337 states have (on average 1.5198973042362003) internal successors, (3552), 2541 states have internal predecessors, (3552), 923 states have call successors, (923), 196 states have call predecessors, (923), 198 states have return successors, (1048), 859 states have call predecessors, (1048), 917 states have call successors, (1048) [2023-11-19 05:25:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 5523 transitions. [2023-11-19 05:25:33,204 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 5523 transitions. Word has length 87 [2023-11-19 05:25:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:33,205 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 5523 transitions. [2023-11-19 05:25:33,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:25:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 5523 transitions. [2023-11-19 05:25:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 05:25:33,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:33,218 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:33,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:33,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:33,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash -919966339, now seen corresponding path program 1 times [2023-11-19 05:25:33,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:33,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054344248] [2023-11-19 05:25:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:33,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:25:34,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:34,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054344248] [2023-11-19 05:25:34,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054344248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:34,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316175601] [2023-11-19 05:25:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:34,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:34,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:34,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:34,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:25:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:34,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:25:34,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:25:35,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316175601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-19 05:25:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936684495] [2023-11-19 05:25:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:35,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:25:35,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:25:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:35,164 INFO L87 Difference]: Start difference. First operand 3459 states and 5523 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 05:25:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:36,523 INFO L93 Difference]: Finished difference Result 6124 states and 9813 transitions. [2023-11-19 05:25:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:25:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 88 [2023-11-19 05:25:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:36,565 INFO L225 Difference]: With dead ends: 6124 [2023-11-19 05:25:36,566 INFO L226 Difference]: Without dead ends: 3498 [2023-11-19 05:25:36,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:25:36,595 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 437 mSDsluCounter, 2307 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:36,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2954 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:25:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2023-11-19 05:25:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3495. [2023-11-19 05:25:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2361 states have (on average 1.5146124523506987) internal successors, (3576), 2561 states have internal predecessors, (3576), 923 states have call successors, (923), 200 states have call predecessors, (923), 210 states have return successors, (1064), 871 states have call predecessors, (1064), 917 states have call successors, (1064) [2023-11-19 05:25:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5563 transitions. [2023-11-19 05:25:36,963 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5563 transitions. Word has length 88 [2023-11-19 05:25:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:36,964 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5563 transitions. [2023-11-19 05:25:36,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 05:25:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5563 transitions. [2023-11-19 05:25:36,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 05:25:36,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:36,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:37,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:37,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:37,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:37,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1021652037, now seen corresponding path program 1 times [2023-11-19 05:25:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:37,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104681367] [2023-11-19 05:25:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:37,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:25:38,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104681367] [2023-11-19 05:25:38,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104681367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256680769] [2023-11-19 05:25:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:38,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:38,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:38,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:25:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:38,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 05:25:38,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:25:38,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:25:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256680769] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:39,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:39,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2023-11-19 05:25:39,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282666489] [2023-11-19 05:25:39,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:39,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:25:39,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:25:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:25:39,124 INFO L87 Difference]: Start difference. First operand 3495 states and 5563 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:25:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:43,054 INFO L93 Difference]: Finished difference Result 9159 states and 15255 transitions. [2023-11-19 05:25:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 05:25:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2023-11-19 05:25:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:43,115 INFO L225 Difference]: With dead ends: 9159 [2023-11-19 05:25:43,115 INFO L226 Difference]: Without dead ends: 6871 [2023-11-19 05:25:43,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 05:25:43,147 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 2567 mSDsluCounter, 2123 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2655 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:43,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2655 Valid, 2762 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 05:25:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2023-11-19 05:25:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5998. [2023-11-19 05:25:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1854), 1280 states have call predecessors, (1854), 1333 states have call successors, (1854) [2023-11-19 05:25:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9693 transitions. [2023-11-19 05:25:43,731 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9693 transitions. Word has length 92 [2023-11-19 05:25:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:43,732 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9693 transitions. [2023-11-19 05:25:43,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:25:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9693 transitions. [2023-11-19 05:25:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 05:25:43,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:43,738 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:43,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:43,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:25:43,951 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:43,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2052903998, now seen corresponding path program 1 times [2023-11-19 05:25:43,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:43,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113152687] [2023-11-19 05:25:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:43,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:25:44,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113152687] [2023-11-19 05:25:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113152687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697059434] [2023-11-19 05:25:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:44,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:44,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:44,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:25:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:45,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 1621 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:25:45,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:25:45,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:45,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697059434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:45,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:45,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-19 05:25:45,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076459241] [2023-11-19 05:25:45,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:45,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:25:45,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:45,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:25:45,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:25:45,290 INFO L87 Difference]: Start difference. First operand 5998 states and 9693 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:25:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:46,321 INFO L93 Difference]: Finished difference Result 10805 states and 17544 transitions. [2023-11-19 05:25:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:25:46,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2023-11-19 05:25:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:46,386 INFO L225 Difference]: With dead ends: 10805 [2023-11-19 05:25:46,386 INFO L226 Difference]: Without dead ends: 6014 [2023-11-19 05:25:46,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:46,412 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 419 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:46,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2389 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:25:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2023-11-19 05:25:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 5998. [2023-11-19 05:25:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1846), 1280 states have call predecessors, (1846), 1333 states have call successors, (1846) [2023-11-19 05:25:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9685 transitions. [2023-11-19 05:25:47,120 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9685 transitions. Word has length 96 [2023-11-19 05:25:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:47,120 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9685 transitions. [2023-11-19 05:25:47,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:25:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9685 transitions. [2023-11-19 05:25:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 05:25:47,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:47,129 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:47,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:47,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 05:25:47,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:47,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1266995063, now seen corresponding path program 1 times [2023-11-19 05:25:47,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:47,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736770050] [2023-11-19 05:25:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:25:48,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736770050] [2023-11-19 05:25:48,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736770050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934640515] [2023-11-19 05:25:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:48,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:48,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:48,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:48,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:25:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:48,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:25:48,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:25:48,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:48,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934640515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:48,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:48,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-19 05:25:48,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198905209] [2023-11-19 05:25:48,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:48,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:25:48,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:25:48,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:48,671 INFO L87 Difference]: Start difference. First operand 5998 states and 9685 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:25:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:49,288 INFO L93 Difference]: Finished difference Result 11449 states and 18974 transitions. [2023-11-19 05:25:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:25:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 121 [2023-11-19 05:25:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:49,352 INFO L225 Difference]: With dead ends: 11449 [2023-11-19 05:25:49,352 INFO L226 Difference]: Without dead ends: 6296 [2023-11-19 05:25:49,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:49,388 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 13 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3618 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:49,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3618 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:25:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2023-11-19 05:25:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6204. [2023-11-19 05:25:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 4383 states have (on average 1.5144877937485741) internal successors, (6638), 4639 states have internal predecessors, (6638), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1330 states have call predecessors, (2231), 1343 states have call successors, (2231) [2023-11-19 05:25:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 10220 transitions. [2023-11-19 05:25:50,003 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 10220 transitions. Word has length 121 [2023-11-19 05:25:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:50,003 INFO L495 AbstractCegarLoop]: Abstraction has 6204 states and 10220 transitions. [2023-11-19 05:25:50,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:25:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 10220 transitions. [2023-11-19 05:25:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 05:25:50,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:50,010 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:50,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:50,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:50,229 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:50,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1975171633, now seen corresponding path program 1 times [2023-11-19 05:25:50,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:50,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500225512] [2023-11-19 05:25:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:50,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 05:25:51,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:51,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500225512] [2023-11-19 05:25:51,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500225512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:51,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369837566] [2023-11-19 05:25:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:51,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:51,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:51,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:25:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:51,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:25:51,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:25:51,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:51,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369837566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:51,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:51,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-19 05:25:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114496387] [2023-11-19 05:25:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:51,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:25:51,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:25:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:51,539 INFO L87 Difference]: Start difference. First operand 6204 states and 10220 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:25:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:52,216 INFO L93 Difference]: Finished difference Result 11797 states and 19795 transitions. [2023-11-19 05:25:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:25:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 125 [2023-11-19 05:25:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:52,268 INFO L225 Difference]: With dead ends: 11797 [2023-11-19 05:25:52,268 INFO L226 Difference]: Without dead ends: 6446 [2023-11-19 05:25:52,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:52,300 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 13 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3618 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:52,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3618 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:25:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6446 states. [2023-11-19 05:25:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6446 to 6232. [2023-11-19 05:25:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 4411 states have (on average 1.5112219451371571) internal successors, (6666), 4639 states have internal predecessors, (6666), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1358 states have call predecessors, (2231), 1343 states have call successors, (2231) [2023-11-19 05:25:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 10248 transitions. [2023-11-19 05:25:52,798 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 10248 transitions. Word has length 125 [2023-11-19 05:25:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:52,799 INFO L495 AbstractCegarLoop]: Abstraction has 6232 states and 10248 transitions. [2023-11-19 05:25:52,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:25:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 10248 transitions. [2023-11-19 05:25:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-19 05:25:52,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:52,805 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:52,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:53,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:53,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:53,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1528259581, now seen corresponding path program 1 times [2023-11-19 05:25:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:53,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225650342] [2023-11-19 05:25:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 05:25:53,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:53,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225650342] [2023-11-19 05:25:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225650342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:53,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959947613] [2023-11-19 05:25:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:53,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:53,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:53,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:53,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d61dd9af-5ea5-497e-bd64-ef74c9617d93/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:25:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:54,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:25:54,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:25:54,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:54,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959947613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:54,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:54,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-19 05:25:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861974452] [2023-11-19 05:25:54,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:25:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:54,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:25:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:54,373 INFO L87 Difference]: Start difference. First operand 6232 states and 10248 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:25:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:55,037 INFO L93 Difference]: Finished difference Result 11853 states and 19851 transitions. [2023-11-19 05:25:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:25:55,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2023-11-19 05:25:55,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:55,084 INFO L225 Difference]: With dead ends: 11853 [2023-11-19 05:25:55,084 INFO L226 Difference]: Without dead ends: 6474 [2023-11-19 05:25:55,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:25:55,116 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 13 mSDsluCounter, 3013 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:55,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3624 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:25:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2023-11-19 05:25:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 6260. [2023-11-19 05:25:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 4439 states have (on average 1.5079972966884434) internal successors, (6694), 4639 states have internal predecessors, (6694), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1386 states have call predecessors, (2231), 1343 states have call successors, (2231)