./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje --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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:57:02,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:57:02,839 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:57:02,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:57:02,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:57:02,874 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:57:02,875 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:57:02,875 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:57:02,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:57:02,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:57:02,877 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:57:02,879 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:57:02,879 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:57:02,881 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:57:02,882 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:57:02,882 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:57:02,882 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:57:02,883 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:57:02,883 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:57:02,884 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:57:02,884 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:57:02,885 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:57:02,885 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:57:02,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:57:02,886 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:57:02,887 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:57:02,887 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:57:02,887 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:57:02,888 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:57:02,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:57:02,889 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:57:02,889 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:57:02,889 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:57:02,890 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:57:02,890 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:57:02,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:57:02,891 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:57:02,891 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:57:02,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:57:02,892 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:57:02,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:57:02,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:57:02,894 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:57:02,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:57:02,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:57:02,895 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:57:02,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:57:02,895 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_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2024-11-09 05:57:03,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:57:03,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:57:03,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:57:03,232 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:57:03,233 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:57:03,235 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c Unable to find full path for "g++" [2024-11-09 05:57:05,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:57:05,719 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:57:05,720 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2024-11-09 05:57:05,741 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/data/18d9751d4/49bd93327fe34da8bccf7f5db4b1ed06/FLAGa2dcaf55c [2024-11-09 05:57:05,964 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/data/18d9751d4/49bd93327fe34da8bccf7f5db4b1ed06 [2024-11-09 05:57:05,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:57:05,969 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:57:05,970 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:57:05,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:57:05,980 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:57:05,981 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:57:05" (1/1) ... [2024-11-09 05:57:05,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bdcfcde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:05, skipping insertion in model container [2024-11-09 05:57:05,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:57:05" (1/1) ... [2024-11-09 05:57:06,066 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:57:06,577 WARN L250 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_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2024-11-09 05:57:06,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:57:06,766 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:57:06,778 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2024-11-09 05:57:06,779 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [86] [2024-11-09 05:57:06,780 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [452] [2024-11-09 05:57:06,781 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1120] [2024-11-09 05:57:06,781 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1476] [2024-11-09 05:57:06,782 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1485] [2024-11-09 05:57:06,782 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2984] [2024-11-09 05:57:06,782 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [3102] [2024-11-09 05:57:06,782 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3288] [2024-11-09 05:57:06,783 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3303] [2024-11-09 05:57:06,887 WARN L250 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_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2024-11-09 05:57:06,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:57:07,057 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:57:07,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07 WrapperNode [2024-11-09 05:57:07,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:57:07,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:57:07,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:57:07,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:57:07,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,155 INFO L138 Inliner]: procedures = 90, calls = 344, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 817 [2024-11-09 05:57:07,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:57:07,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:57:07,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:57:07,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:57:07,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:57:07,264 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:57:07,264 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:57:07,264 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:57:07,265 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (1/1) ... [2024-11-09 05:57:07,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:57:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:07,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:57:07,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:57:07,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:57:07,341 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-09 05:57:07,341 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-09 05:57:07,341 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-09 05:57:07,341 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-09 05:57:07,341 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-09 05:57:07,342 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-09 05:57:07,342 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-09 05:57:07,342 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-09 05:57:07,342 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-09 05:57:07,343 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-09 05:57:07,343 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-09 05:57:07,343 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-09 05:57:07,343 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-09 05:57:07,344 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-09 05:57:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-09 05:57:07,344 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-09 05:57:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-09 05:57:07,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-09 05:57:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-09 05:57:07,345 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-09 05:57:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-09 05:57:07,345 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-09 05:57:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-09 05:57:07,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-09 05:57:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-09 05:57:07,346 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-09 05:57:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-09 05:57:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-09 05:57:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-09 05:57:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-09 05:57:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-09 05:57:07,348 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-09 05:57:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-09 05:57:07,348 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-09 05:57:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-09 05:57:07,348 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-09 05:57:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-09 05:57:07,349 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-09 05:57:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:57:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2024-11-09 05:57:07,349 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2024-11-09 05:57:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-09 05:57:07,349 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-09 05:57:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-09 05:57:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-09 05:57:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-09 05:57:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-09 05:57:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-09 05:57:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-09 05:57:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:57:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:57:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-09 05:57:07,352 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-09 05:57:07,504 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:57:07,507 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:57:08,969 INFO L? ?]: Removed 439 outVars from TransFormulas that were not future-live. [2024-11-09 05:57:08,969 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:57:10,043 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:57:10,043 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:57:10,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:57:10 BoogieIcfgContainer [2024-11-09 05:57:10,044 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:57:10,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:57:10,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:57:10,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:57:10,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:57:05" (1/3) ... [2024-11-09 05:57:10,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d542884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:57:10, skipping insertion in model container [2024-11-09 05:57:10,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:57:07" (2/3) ... [2024-11-09 05:57:10,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d542884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:57:10, skipping insertion in model container [2024-11-09 05:57:10,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:57:10" (3/3) ... [2024-11-09 05:57:10,057 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2024-11-09 05:57:10,079 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:57:10,079 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:57:10,183 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:57:10,192 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@70ac58df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:57:10,192 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:57:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2024-11-09 05:57:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:57:10,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:10,217 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:10,218 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:10,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1758144901, now seen corresponding path program 1 times [2024-11-09 05:57:10,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:10,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806627369] [2024-11-09 05:57:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:57:11,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:11,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806627369] [2024-11-09 05:57:11,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806627369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:11,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915888343] [2024-11-09 05:57:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:11,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:11,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:11,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:57:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:11,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:57:11,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:57:11,804 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:11,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915888343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:11,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:11,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:57:11,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121999649] [2024-11-09 05:57:11,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:11,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:57:11,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:57:11,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:57:11,853 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:57:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:12,305 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2024-11-09 05:57:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:57:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2024-11-09 05:57:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:12,329 INFO L225 Difference]: With dead ends: 1095 [2024-11-09 05:57:12,330 INFO L226 Difference]: Without dead ends: 707 [2024-11-09 05:57:12,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:57:12,354 INFO L432 NwaCegarLoop]: 581 mSDtfsCounter, 585 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:12,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1069 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:57:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2024-11-09 05:57:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2024-11-09 05:57:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2024-11-09 05:57:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2024-11-09 05:57:12,495 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2024-11-09 05:57:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:12,498 INFO L471 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2024-11-09 05:57:12,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:57:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2024-11-09 05:57:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:57:12,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:12,504 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:12,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:57:12,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-09 05:57:12,709 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:12,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1947139044, now seen corresponding path program 1 times [2024-11-09 05:57:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:12,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087288142] [2024-11-09 05:57:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:57:13,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:13,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087288142] [2024-11-09 05:57:13,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087288142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:13,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:57:13,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:57:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812468559] [2024-11-09 05:57:13,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:13,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:57:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:57:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:57:13,145 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 05:57:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:13,555 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2024-11-09 05:57:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:57:13,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2024-11-09 05:57:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:13,572 INFO L225 Difference]: With dead ends: 2057 [2024-11-09 05:57:13,573 INFO L226 Difference]: Without dead ends: 1374 [2024-11-09 05:57:13,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:57:13,578 INFO L432 NwaCegarLoop]: 631 mSDtfsCounter, 576 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:13,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1177 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:57:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2024-11-09 05:57:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2024-11-09 05:57:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2024-11-09 05:57:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2024-11-09 05:57:13,725 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2024-11-09 05:57:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:13,725 INFO L471 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2024-11-09 05:57:13,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 05:57:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2024-11-09 05:57:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 05:57:13,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:13,739 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:13,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:57:13,740 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:13,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1995854026, now seen corresponding path program 1 times [2024-11-09 05:57:13,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:13,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177500168] [2024-11-09 05:57:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:13,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:57:14,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177500168] [2024-11-09 05:57:14,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177500168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:14,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:57:14,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:57:14,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901746653] [2024-11-09 05:57:14,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:14,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:57:14,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:57:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:57:14,224 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 05:57:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:14,536 INFO L93 Difference]: Finished difference Result 2925 states and 4747 transitions. [2024-11-09 05:57:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:57:14,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2024-11-09 05:57:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:14,549 INFO L225 Difference]: With dead ends: 2925 [2024-11-09 05:57:14,550 INFO L226 Difference]: Without dead ends: 1647 [2024-11-09 05:57:14,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:57:14,558 INFO L432 NwaCegarLoop]: 604 mSDtfsCounter, 410 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:14,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 1549 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:57:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2024-11-09 05:57:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1609. [2024-11-09 05:57:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1119 states have (on average 1.5630026809651474) internal successors, (1749), 1173 states have internal predecessors, (1749), 386 states have call successors, (386), 104 states have call predecessors, (386), 103 states have return successors, (464), 359 states have call predecessors, (464), 380 states have call successors, (464) [2024-11-09 05:57:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2599 transitions. [2024-11-09 05:57:14,678 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2599 transitions. Word has length 69 [2024-11-09 05:57:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:14,681 INFO L471 AbstractCegarLoop]: Abstraction has 1609 states and 2599 transitions. [2024-11-09 05:57:14,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 05:57:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2599 transitions. [2024-11-09 05:57:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 05:57:14,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:14,686 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:14,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:57:14,686 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:14,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash -666486762, now seen corresponding path program 1 times [2024-11-09 05:57:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:14,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421341275] [2024-11-09 05:57:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:57:15,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:15,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421341275] [2024-11-09 05:57:15,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421341275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:15,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:57:15,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:57:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760193731] [2024-11-09 05:57:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:15,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:57:15,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:15,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:57:15,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:57:15,179 INFO L87 Difference]: Start difference. First operand 1609 states and 2599 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 05:57:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:16,330 INFO L93 Difference]: Finished difference Result 3966 states and 6575 transitions. [2024-11-09 05:57:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:57:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2024-11-09 05:57:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:16,351 INFO L225 Difference]: With dead ends: 3966 [2024-11-09 05:57:16,351 INFO L226 Difference]: Without dead ends: 2369 [2024-11-09 05:57:16,366 INFO L431 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 [2024-11-09 05:57:16,371 INFO L432 NwaCegarLoop]: 640 mSDtfsCounter, 561 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:16,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 2913 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:57:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2024-11-09 05:57:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2333. [2024-11-09 05:57:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1628 states have (on average 1.5546683046683047) internal successors, (2531), 1714 states have internal predecessors, (2531), 552 states have call successors, (552), 153 states have call predecessors, (552), 152 states have return successors, (723), 509 states have call predecessors, (723), 544 states have call successors, (723) [2024-11-09 05:57:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3806 transitions. [2024-11-09 05:57:16,589 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3806 transitions. Word has length 70 [2024-11-09 05:57:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:16,590 INFO L471 AbstractCegarLoop]: Abstraction has 2333 states and 3806 transitions. [2024-11-09 05:57:16,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 05:57:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3806 transitions. [2024-11-09 05:57:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 05:57:16,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:16,594 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:16,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:57:16,595 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:16,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2075477508, now seen corresponding path program 1 times [2024-11-09 05:57:16,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:16,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120418084] [2024-11-09 05:57:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:16,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:57:16,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120418084] [2024-11-09 05:57:16,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120418084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348912822] [2024-11-09 05:57:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:16,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:16,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:16,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:16,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:57:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:17,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:57:17,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:57:17,595 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:17,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348912822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:17,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:17,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:57:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185984062] [2024-11-09 05:57:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:17,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:57:17,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:57:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:57:17,598 INFO L87 Difference]: Start difference. First operand 2333 states and 3806 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:57:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:18,063 INFO L93 Difference]: Finished difference Result 5739 states and 9684 transitions. [2024-11-09 05:57:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:57:18,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-11-09 05:57:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:18,134 INFO L225 Difference]: With dead ends: 5739 [2024-11-09 05:57:18,134 INFO L226 Difference]: Without dead ends: 3418 [2024-11-09 05:57:18,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:57:18,163 INFO L432 NwaCegarLoop]: 580 mSDtfsCounter, 552 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1062 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 [2024-11-09 05:57:18,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1062 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:57:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2024-11-09 05:57:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3273. [2024-11-09 05:57:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 2297 states have (on average 1.5559425337396604) internal successors, (3574), 2427 states have internal predecessors, (3574), 760 states have call successors, (760), 210 states have call predecessors, (760), 215 states have return successors, (1032), 701 states have call predecessors, (1032), 752 states have call successors, (1032) [2024-11-09 05:57:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 5366 transitions. [2024-11-09 05:57:18,584 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 5366 transitions. Word has length 70 [2024-11-09 05:57:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:18,585 INFO L471 AbstractCegarLoop]: Abstraction has 3273 states and 5366 transitions. [2024-11-09 05:57:18,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:57:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 5366 transitions. [2024-11-09 05:57:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 05:57:18,591 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:18,591 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:18,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:18,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:18,792 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:18,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash 911306951, now seen corresponding path program 1 times [2024-11-09 05:57:18,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:18,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232065943] [2024-11-09 05:57:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:18,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:57:19,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232065943] [2024-11-09 05:57:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232065943] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:19,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479398004] [2024-11-09 05:57:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:19,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:19,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:19,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:57:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:19,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:57:19,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:57:19,809 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:19,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479398004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:19,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:19,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 05:57:19,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583534591] [2024-11-09 05:57:19,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:19,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:57:19,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:57:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:57:19,812 INFO L87 Difference]: Start difference. First operand 3273 states and 5366 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 05:57:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:20,633 INFO L93 Difference]: Finished difference Result 8343 states and 13912 transitions. [2024-11-09 05:57:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:57:20,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2024-11-09 05:57:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:20,683 INFO L225 Difference]: With dead ends: 8343 [2024-11-09 05:57:20,683 INFO L226 Difference]: Without dead ends: 5082 [2024-11-09 05:57:20,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:57:20,716 INFO L432 NwaCegarLoop]: 599 mSDtfsCounter, 487 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:20,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1666 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:57:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2024-11-09 05:57:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5034. [2024-11-09 05:57:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 3538 states have (on average 1.5146975692481628) internal successors, (5359), 3752 states have internal predecessors, (5359), 1163 states have call successors, (1163), 336 states have call predecessors, (1163), 332 states have return successors, (1512), 1051 states have call predecessors, (1512), 1152 states have call successors, (1512) [2024-11-09 05:57:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 8034 transitions. [2024-11-09 05:57:21,108 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 8034 transitions. Word has length 71 [2024-11-09 05:57:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:21,109 INFO L471 AbstractCegarLoop]: Abstraction has 5034 states and 8034 transitions. [2024-11-09 05:57:21,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 05:57:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 8034 transitions. [2024-11-09 05:57:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-09 05:57:21,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:21,112 INFO L215 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] [2024-11-09 05:57:21,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:57:21,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:57:21,314 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:21,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1746572877, now seen corresponding path program 1 times [2024-11-09 05:57:21,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:21,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499049396] [2024-11-09 05:57:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:21,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:57:22,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499049396] [2024-11-09 05:57:22,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499049396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693867799] [2024-11-09 05:57:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:22,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:22,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:57:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:22,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:57:22,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:57:22,543 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:22,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693867799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:22,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:22,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 05:57:22,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718009789] [2024-11-09 05:57:22,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:22,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:57:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:57:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:57:22,547 INFO L87 Difference]: Start difference. First operand 5034 states and 8034 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:57:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:23,137 INFO L93 Difference]: Finished difference Result 8919 states and 14391 transitions. [2024-11-09 05:57:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:57:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2024-11-09 05:57:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:23,193 INFO L225 Difference]: With dead ends: 8919 [2024-11-09 05:57:23,194 INFO L226 Difference]: Without dead ends: 5064 [2024-11-09 05:57:23,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:57:23,230 INFO L432 NwaCegarLoop]: 568 mSDtfsCounter, 0 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:23,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1701 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:57:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2024-11-09 05:57:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 5064. [2024-11-09 05:57:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 3568 states have (on average 1.5103699551569507) internal successors, (5389), 3782 states have internal predecessors, (5389), 1163 states have call successors, (1163), 336 states have call predecessors, (1163), 332 states have return successors, (1512), 1051 states have call predecessors, (1512), 1152 states have call successors, (1512) [2024-11-09 05:57:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 8064 transitions. [2024-11-09 05:57:23,644 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 8064 transitions. Word has length 80 [2024-11-09 05:57:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:23,645 INFO L471 AbstractCegarLoop]: Abstraction has 5064 states and 8064 transitions. [2024-11-09 05:57:23,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:57:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 8064 transitions. [2024-11-09 05:57:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 05:57:23,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:23,652 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-09 05:57:23,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:57:23,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:57:23,853 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:23,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1875775415, now seen corresponding path program 1 times [2024-11-09 05:57:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:23,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954923016] [2024-11-09 05:57:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:57:24,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954923016] [2024-11-09 05:57:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954923016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:24,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924433645] [2024-11-09 05:57:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:24,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:24,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:24,664 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:24,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:57:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:25,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:57:25,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:57:25,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:57:25,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924433645] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:25,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:57:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2024-11-09 05:57:25,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144577586] [2024-11-09 05:57:25,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:25,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:57:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:57:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:57:25,761 INFO L87 Difference]: Start difference. First operand 5064 states and 8064 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-09 05:57:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:28,393 INFO L93 Difference]: Finished difference Result 10433 states and 16815 transitions. [2024-11-09 05:57:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:57:28,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2024-11-09 05:57:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:28,484 INFO L225 Difference]: With dead ends: 10433 [2024-11-09 05:57:28,484 INFO L226 Difference]: Without dead ends: 6566 [2024-11-09 05:57:28,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:57:28,515 INFO L432 NwaCegarLoop]: 629 mSDtfsCounter, 1068 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:28,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 1621 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-09 05:57:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2024-11-09 05:57:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 5759. [2024-11-09 05:57:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 4069 states have (on average 1.4898009338903908) internal successors, (6062), 4326 states have internal predecessors, (6062), 1296 states have call successors, (1296), 360 states have call predecessors, (1296), 393 states have return successors, (1822), 1172 states have call predecessors, (1822), 1285 states have call successors, (1822) [2024-11-09 05:57:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 9180 transitions. [2024-11-09 05:57:29,152 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 9180 transitions. Word has length 84 [2024-11-09 05:57:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:29,153 INFO L471 AbstractCegarLoop]: Abstraction has 5759 states and 9180 transitions. [2024-11-09 05:57:29,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-09 05:57:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 9180 transitions. [2024-11-09 05:57:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 05:57:29,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:29,159 INFO L215 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] [2024-11-09 05:57:29,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:57:29,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:57:29,360 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:29,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1350875609, now seen corresponding path program 1 times [2024-11-09 05:57:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:29,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511328330] [2024-11-09 05:57:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:29,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:57:30,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511328330] [2024-11-09 05:57:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511328330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070946792] [2024-11-09 05:57:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:30,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:30,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:30,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:57:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:30,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 05:57:30,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:57:31,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:57:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070946792] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:31,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:57:31,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2024-11-09 05:57:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839803231] [2024-11-09 05:57:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:31,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:57:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:57:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:57:31,749 INFO L87 Difference]: Start difference. First operand 5759 states and 9180 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-09 05:57:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:36,478 INFO L93 Difference]: Finished difference Result 16572 states and 29104 transitions. [2024-11-09 05:57:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:57:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2024-11-09 05:57:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:36,594 INFO L225 Difference]: With dead ends: 16572 [2024-11-09 05:57:36,594 INFO L226 Difference]: Without dead ends: 12448 [2024-11-09 05:57:36,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 05:57:36,641 INFO L432 NwaCegarLoop]: 568 mSDtfsCounter, 2632 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2721 SdHoareTripleChecker+Valid, 2559 SdHoareTripleChecker+Invalid, 3150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:36,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2721 Valid, 2559 Invalid, 3150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1216 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-09 05:57:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12448 states. [2024-11-09 05:57:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12448 to 11013. [2024-11-09 05:57:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 7907 states have (on average 1.4996838244593398) internal successors, (11858), 8350 states have internal predecessors, (11858), 2330 states have call successors, (2330), 681 states have call predecessors, (2330), 775 states have return successors, (4145), 2141 states have call predecessors, (4145), 2313 states have call successors, (4145) [2024-11-09 05:57:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 18333 transitions. [2024-11-09 05:57:37,845 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 18333 transitions. Word has length 87 [2024-11-09 05:57:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:37,846 INFO L471 AbstractCegarLoop]: Abstraction has 11013 states and 18333 transitions. [2024-11-09 05:57:37,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-09 05:57:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 18333 transitions. [2024-11-09 05:57:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 05:57:37,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:37,852 INFO L215 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] [2024-11-09 05:57:37,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:38,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:38,053 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:38,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1222883551, now seen corresponding path program 1 times [2024-11-09 05:57:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:38,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809603937] [2024-11-09 05:57:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:57:38,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809603937] [2024-11-09 05:57:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809603937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984541494] [2024-11-09 05:57:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:38,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:38,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:38,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:38,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:57:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:39,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:57:39,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:57:39,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:57:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984541494] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:39,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:57:39,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2024-11-09 05:57:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173475801] [2024-11-09 05:57:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:39,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:57:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:57:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:57:39,771 INFO L87 Difference]: Start difference. First operand 11013 states and 18333 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-09 05:57:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:42,542 INFO L93 Difference]: Finished difference Result 21891 states and 37187 transitions. [2024-11-09 05:57:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:57:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2024-11-09 05:57:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:42,637 INFO L225 Difference]: With dead ends: 21891 [2024-11-09 05:57:42,637 INFO L226 Difference]: Without dead ends: 12513 [2024-11-09 05:57:42,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:57:42,686 INFO L432 NwaCegarLoop]: 599 mSDtfsCounter, 901 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:42,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 1838 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:57:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12513 states. [2024-11-09 05:57:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12513 to 11013. [2024-11-09 05:57:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 7907 states have (on average 1.4996838244593398) internal successors, (11858), 8350 states have internal predecessors, (11858), 2330 states have call successors, (2330), 681 states have call predecessors, (2330), 775 states have return successors, (4133), 2141 states have call predecessors, (4133), 2313 states have call successors, (4133) [2024-11-09 05:57:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 18321 transitions. [2024-11-09 05:57:43,873 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 18321 transitions. Word has length 91 [2024-11-09 05:57:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:43,874 INFO L471 AbstractCegarLoop]: Abstraction has 11013 states and 18321 transitions. [2024-11-09 05:57:43,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-09 05:57:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 18321 transitions. [2024-11-09 05:57:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 05:57:43,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:43,882 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-09 05:57:43,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:57:44,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:44,086 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:44,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1981161831, now seen corresponding path program 1 times [2024-11-09 05:57:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:44,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616679900] [2024-11-09 05:57:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:44,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:57:44,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:44,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616679900] [2024-11-09 05:57:44,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616679900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:44,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90895114] [2024-11-09 05:57:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:44,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:44,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:44,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:57:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:45,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:57:45,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:57:45,179 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:45,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90895114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:45,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:45,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-09 05:57:45,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939309057] [2024-11-09 05:57:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:45,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:57:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:57:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:57:45,181 INFO L87 Difference]: Start difference. First operand 11013 states and 18321 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-09 05:57:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:46,178 INFO L93 Difference]: Finished difference Result 21099 states and 36266 transitions. [2024-11-09 05:57:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:57:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2024-11-09 05:57:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:46,265 INFO L225 Difference]: With dead ends: 21099 [2024-11-09 05:57:46,266 INFO L226 Difference]: Without dead ends: 11301 [2024-11-09 05:57:46,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:57:46,330 INFO L432 NwaCegarLoop]: 570 mSDtfsCounter, 0 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:46,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2257 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:57:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11301 states. [2024-11-09 05:57:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11301 to 11235. [2024-11-09 05:57:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11235 states, 8057 states have (on average 1.4903810351247362) internal successors, (12008), 8533 states have internal predecessors, (12008), 2330 states have call successors, (2330), 681 states have call predecessors, (2330), 847 states have return successors, (4615), 2180 states have call predecessors, (4615), 2313 states have call successors, (4615) [2024-11-09 05:57:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11235 states to 11235 states and 18953 transitions. [2024-11-09 05:57:47,533 INFO L78 Accepts]: Start accepts. Automaton has 11235 states and 18953 transitions. Word has length 111 [2024-11-09 05:57:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:47,534 INFO L471 AbstractCegarLoop]: Abstraction has 11235 states and 18953 transitions. [2024-11-09 05:57:47,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-09 05:57:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 11235 states and 18953 transitions. [2024-11-09 05:57:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-09 05:57:47,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:47,555 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:47,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:57:47,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:57:47,756 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:47,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2128444640, now seen corresponding path program 1 times [2024-11-09 05:57:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:47,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299639700] [2024-11-09 05:57:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:47,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:57:48,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299639700] [2024-11-09 05:57:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299639700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:48,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924328402] [2024-11-09 05:57:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:48,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:48,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:48,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:48,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:57:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:49,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:57:49,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:57:49,143 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924328402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:49,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:49,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 05:57:49,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440084622] [2024-11-09 05:57:49,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:49,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:57:49,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:57:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:57:49,146 INFO L87 Difference]: Start difference. First operand 11235 states and 18953 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:57:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:50,244 INFO L93 Difference]: Finished difference Result 23381 states and 40966 transitions. [2024-11-09 05:57:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:57:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2024-11-09 05:57:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:50,338 INFO L225 Difference]: With dead ends: 23381 [2024-11-09 05:57:50,338 INFO L226 Difference]: Without dead ends: 11018 [2024-11-09 05:57:50,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:57:50,430 INFO L432 NwaCegarLoop]: 603 mSDtfsCounter, 241 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:50,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1579 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:57:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11018 states. [2024-11-09 05:57:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11018 to 10921. [2024-11-09 05:57:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10921 states, 7781 states have (on average 1.4568821488240586) internal successors, (11336), 8283 states have internal predecessors, (11336), 2272 states have call successors, (2272), 677 states have call predecessors, (2272), 867 states have return successors, (4463), 2120 states have call predecessors, (4463), 2255 states have call successors, (4463) [2024-11-09 05:57:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 18071 transitions. [2024-11-09 05:57:51,498 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 18071 transitions. Word has length 122 [2024-11-09 05:57:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:51,498 INFO L471 AbstractCegarLoop]: Abstraction has 10921 states and 18071 transitions. [2024-11-09 05:57:51,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:57:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 18071 transitions. [2024-11-09 05:57:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-09 05:57:51,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:51,510 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:51,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:57:51,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:57:51,711 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:51,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1097343504, now seen corresponding path program 1 times [2024-11-09 05:57:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:51,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781963420] [2024-11-09 05:57:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:57:52,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781963420] [2024-11-09 05:57:52,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781963420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065209459] [2024-11-09 05:57:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:52,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:52,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:52,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:52,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:57:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:52,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:57:52,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:57:52,790 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065209459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:52,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:52,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 05:57:52,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576640161] [2024-11-09 05:57:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:52,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:57:52,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:57:52,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:57:52,793 INFO L87 Difference]: Start difference. First operand 10921 states and 18071 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:57:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:53,717 INFO L93 Difference]: Finished difference Result 23203 states and 40413 transitions. [2024-11-09 05:57:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:57:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2024-11-09 05:57:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:53,801 INFO L225 Difference]: With dead ends: 23203 [2024-11-09 05:57:53,801 INFO L226 Difference]: Without dead ends: 11126 [2024-11-09 05:57:53,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:57:53,881 INFO L432 NwaCegarLoop]: 595 mSDtfsCounter, 218 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:53,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1570 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:57:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11126 states. [2024-11-09 05:57:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11126 to 10940. [2024-11-09 05:57:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10940 states, 7791 states have (on average 1.4195867026055706) internal successors, (11060), 8302 states have internal predecessors, (11060), 2272 states have call successors, (2272), 677 states have call predecessors, (2272), 876 states have return successors, (4511), 2120 states have call predecessors, (4511), 2255 states have call successors, (4511) [2024-11-09 05:57:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10940 states to 10940 states and 17843 transitions. [2024-11-09 05:57:54,804 INFO L78 Accepts]: Start accepts. Automaton has 10940 states and 17843 transitions. Word has length 126 [2024-11-09 05:57:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:54,804 INFO L471 AbstractCegarLoop]: Abstraction has 10940 states and 17843 transitions. [2024-11-09 05:57:54,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:57:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 10940 states and 17843 transitions. [2024-11-09 05:57:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 05:57:54,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:54,819 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:54,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:57:55,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:57:55,020 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:55,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1851554832, now seen corresponding path program 1 times [2024-11-09 05:57:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:55,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646067212] [2024-11-09 05:57:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:55,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 05:57:55,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:57:55,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646067212] [2024-11-09 05:57:55,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646067212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:57:55,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847079962] [2024-11-09 05:57:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:55,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:57:55,429 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:57:55,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:57:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:55,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 2261 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:57:55,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:57:56,102 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:57:56,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847079962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:57:56,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:57:56,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-09 05:57:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552255310] [2024-11-09 05:57:56,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:57:56,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:57:56,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:56,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:57:56,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:57:56,104 INFO L87 Difference]: Start difference. First operand 10940 states and 17843 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-09 05:58:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:00,061 INFO L93 Difference]: Finished difference Result 23776 states and 39734 transitions. [2024-11-09 05:58:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:58:00,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 129 [2024-11-09 05:58:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:00,182 INFO L225 Difference]: With dead ends: 23776 [2024-11-09 05:58:00,182 INFO L226 Difference]: Without dead ends: 12806 [2024-11-09 05:58:00,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:58:00,259 INFO L432 NwaCegarLoop]: 372 mSDtfsCounter, 1020 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 2989 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 2989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:00,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 1582 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 2989 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-09 05:58:00,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12806 states. [2024-11-09 05:58:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12806 to 10979. [2024-11-09 05:58:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 7812 states have (on average 1.4198668714797746) internal successors, (11092), 8341 states have internal predecessors, (11092), 2290 states have call successors, (2290), 677 states have call predecessors, (2290), 876 states have return successors, (4637), 2120 states have call predecessors, (4637), 2273 states have call successors, (4637) [2024-11-09 05:58:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 18019 transitions. [2024-11-09 05:58:01,328 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 18019 transitions. Word has length 129 [2024-11-09 05:58:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:01,328 INFO L471 AbstractCegarLoop]: Abstraction has 10979 states and 18019 transitions. [2024-11-09 05:58:01,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-09 05:58:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 18019 transitions. [2024-11-09 05:58:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-09 05:58:01,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:01,340 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:01,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:58:01,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:58:01,541 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:01,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 888388948, now seen corresponding path program 1 times [2024-11-09 05:58:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:01,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138489741] [2024-11-09 05:58:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 05:58:02,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:02,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138489741] [2024-11-09 05:58:02,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138489741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:02,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984717124] [2024-11-09 05:58:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:02,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:02,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:02,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:02,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:58:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:02,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:58:02,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:58:02,991 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:58:02,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984717124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:02,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:58:02,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-09 05:58:02,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884492533] [2024-11-09 05:58:02,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:02,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:58:02,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:02,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:58:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:58:02,993 INFO L87 Difference]: Start difference. First operand 10979 states and 18019 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2024-11-09 05:58:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:04,039 INFO L93 Difference]: Finished difference Result 25826 states and 44132 transitions. [2024-11-09 05:58:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:58:04,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 136 [2024-11-09 05:58:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:04,187 INFO L225 Difference]: With dead ends: 25826 [2024-11-09 05:58:04,188 INFO L226 Difference]: Without dead ends: 14859 [2024-11-09 05:58:04,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:58:04,285 INFO L432 NwaCegarLoop]: 732 mSDtfsCounter, 459 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:04,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1269 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:58:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14859 states. [2024-11-09 05:58:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14859 to 14543. [2024-11-09 05:58:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14543 states, 10366 states have (on average 1.419448196025468) internal successors, (14714), 11089 states have internal predecessors, (14714), 3017 states have call successors, (3017), 873 states have call predecessors, (3017), 1159 states have return successors, (6272), 2800 states have call predecessors, (6272), 3000 states have call successors, (6272) [2024-11-09 05:58:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14543 states to 14543 states and 24003 transitions. [2024-11-09 05:58:05,743 INFO L78 Accepts]: Start accepts. Automaton has 14543 states and 24003 transitions. Word has length 136 [2024-11-09 05:58:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:05,743 INFO L471 AbstractCegarLoop]: Abstraction has 14543 states and 24003 transitions. [2024-11-09 05:58:05,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2024-11-09 05:58:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14543 states and 24003 transitions. [2024-11-09 05:58:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 05:58:05,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:05,759 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:58:05,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:05,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:58:05,960 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:05,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1129019609, now seen corresponding path program 1 times [2024-11-09 05:58:05,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:05,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932981187] [2024-11-09 05:58:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:05,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 05:58:06,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932981187] [2024-11-09 05:58:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932981187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810434906] [2024-11-09 05:58:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:06,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:06,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:06,781 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:06,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:58:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:07,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 2297 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:58:07,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:58:07,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-09 05:58:07,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810434906] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:07,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:58:07,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 19 [2024-11-09 05:58:07,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192991861] [2024-11-09 05:58:07,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:07,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:58:07,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:58:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:58:07,946 INFO L87 Difference]: Start difference. First operand 14543 states and 24003 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-09 05:58:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:12,265 INFO L93 Difference]: Finished difference Result 37607 states and 67908 transitions. [2024-11-09 05:58:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:58:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 141 [2024-11-09 05:58:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:12,495 INFO L225 Difference]: With dead ends: 37607 [2024-11-09 05:58:12,496 INFO L226 Difference]: Without dead ends: 25282 [2024-11-09 05:58:12,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 275 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:58:12,697 INFO L432 NwaCegarLoop]: 794 mSDtfsCounter, 1801 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:12,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 1898 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-09 05:58:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25282 states. [2024-11-09 05:58:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25282 to 22432. [2024-11-09 05:58:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22432 states, 15855 states have (on average 1.4225165562913906) internal successors, (22554), 16968 states have internal predecessors, (22554), 4778 states have call successors, (4778), 1445 states have call predecessors, (4778), 1798 states have return successors, (9829), 4398 states have call predecessors, (9829), 4752 states have call successors, (9829) [2024-11-09 05:58:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22432 states to 22432 states and 37161 transitions. [2024-11-09 05:58:15,827 INFO L78 Accepts]: Start accepts. Automaton has 22432 states and 37161 transitions. Word has length 141 [2024-11-09 05:58:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:15,827 INFO L471 AbstractCegarLoop]: Abstraction has 22432 states and 37161 transitions. [2024-11-09 05:58:15,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-09 05:58:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22432 states and 37161 transitions. [2024-11-09 05:58:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 05:58:15,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:15,837 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:58:15,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:16,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 05:58:16,037 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:16,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1208368958, now seen corresponding path program 1 times [2024-11-09 05:58:16,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:16,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841470726] [2024-11-09 05:58:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:16,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 05:58:16,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:16,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841470726] [2024-11-09 05:58:16,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841470726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868446719] [2024-11-09 05:58:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:16,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:16,769 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:16,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:58:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:17,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:58:17,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:58:17,413 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:58:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868446719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:17,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:58:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-09 05:58:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790908405] [2024-11-09 05:58:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:17,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:58:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:58:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:58:17,415 INFO L87 Difference]: Start difference. First operand 22432 states and 37161 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:58:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:19,664 INFO L93 Difference]: Finished difference Result 42949 states and 72856 transitions. [2024-11-09 05:58:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:58:19,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2024-11-09 05:58:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:19,956 INFO L225 Difference]: With dead ends: 42949 [2024-11-09 05:58:19,956 INFO L226 Difference]: Without dead ends: 22729 [2024-11-09 05:58:20,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:58:20,345 INFO L432 NwaCegarLoop]: 554 mSDtfsCounter, 17 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:20,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1080 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22729 states. [2024-11-09 05:58:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22729 to 22705. [2024-11-09 05:58:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22705 states, 16093 states have (on average 1.4182563847635619) internal successors, (22824), 17203 states have internal predecessors, (22824), 4814 states have call successors, (4814), 1442 states have call predecessors, (4814), 1797 states have return successors, (9765), 4439 states have call predecessors, (9765), 4788 states have call successors, (9765) [2024-11-09 05:58:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 37403 transitions. [2024-11-09 05:58:22,480 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 37403 transitions. Word has length 141 [2024-11-09 05:58:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:22,480 INFO L471 AbstractCegarLoop]: Abstraction has 22705 states and 37403 transitions. [2024-11-09 05:58:22,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:58:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 37403 transitions. [2024-11-09 05:58:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-09 05:58:22,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:22,497 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:58:22,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:22,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:58:22,698 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:22,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash 490980923, now seen corresponding path program 1 times [2024-11-09 05:58:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:22,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347397595] [2024-11-09 05:58:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 05:58:23,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:23,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347397595] [2024-11-09 05:58:23,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347397595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:23,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196692961] [2024-11-09 05:58:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:23,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:23,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:23,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:58:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:24,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 2298 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:58:24,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:58:24,448 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:58:24,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196692961] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:24,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:58:24,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2024-11-09 05:58:24,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276633653] [2024-11-09 05:58:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:24,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:58:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:58:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:58:24,451 INFO L87 Difference]: Start difference. First operand 22705 states and 37403 transitions. Second operand has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-09 05:58:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:28,523 INFO L93 Difference]: Finished difference Result 57254 states and 95697 transitions. [2024-11-09 05:58:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:58:28,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2024-11-09 05:58:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:28,849 INFO L225 Difference]: With dead ends: 57254 [2024-11-09 05:58:28,849 INFO L226 Difference]: Without dead ends: 36761 [2024-11-09 05:58:29,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:58:29,289 INFO L432 NwaCegarLoop]: 599 mSDtfsCounter, 525 mSDsluCounter, 2963 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 3562 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:29,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 3562 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:58:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36761 states. [2024-11-09 05:58:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36761 to 35162. [2024-11-09 05:58:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35162 states, 24947 states have (on average 1.4253016394756886) internal successors, (35557), 26679 states have internal predecessors, (35557), 7440 states have call successors, (7440), 2267 states have call predecessors, (7440), 2774 states have return successors, (15494), 6831 states have call predecessors, (15494), 7396 states have call successors, (15494) [2024-11-09 05:58:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35162 states to 35162 states and 58491 transitions. [2024-11-09 05:58:32,645 INFO L78 Accepts]: Start accepts. Automaton has 35162 states and 58491 transitions. Word has length 142 [2024-11-09 05:58:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:32,646 INFO L471 AbstractCegarLoop]: Abstraction has 35162 states and 58491 transitions. [2024-11-09 05:58:32,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-09 05:58:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 35162 states and 58491 transitions. [2024-11-09 05:58:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-09 05:58:32,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:32,663 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:32,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 05:58:32,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:58:32,864 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:32,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -22572783, now seen corresponding path program 1 times [2024-11-09 05:58:32,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:32,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266757546] [2024-11-09 05:58:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 05:58:33,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266757546] [2024-11-09 05:58:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266757546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764044064] [2024-11-09 05:58:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:33,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:33,870 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:33,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dbb6d1e-ec9d-4c24-9e00-300679f4d8cb/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:58:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:34,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:58:34,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 05:58:34,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 05:58:35,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764044064] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:35,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:58:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 20 [2024-11-09 05:58:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129377925] [2024-11-09 05:58:35,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:35,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:58:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:58:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:58:35,056 INFO L87 Difference]: Start difference. First operand 35162 states and 58491 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2024-11-09 05:58:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:42,072 INFO L93 Difference]: Finished difference Result 83237 states and 147911 transitions. [2024-11-09 05:58:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:58:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 147 [2024-11-09 05:58:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:42,679 INFO L225 Difference]: With dead ends: 83237 [2024-11-09 05:58:42,679 INFO L226 Difference]: Without dead ends: 50349 [2024-11-09 05:58:42,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:58:42,967 INFO L432 NwaCegarLoop]: 626 mSDtfsCounter, 1756 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:42,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1830 Valid, 1510 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 05:58:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50349 states.