./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.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_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/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_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/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_372787a0-a687-40fa-8bf1-b310f5c18ce1/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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:24:22,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:24:22,122 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:24:22,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:24:22,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:24:22,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:24:22,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:24:22,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:24:22,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:24:22,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:24:22,159 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:24:22,161 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:24:22,162 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:24:22,164 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:24:22,165 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:24:22,165 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:24:22,165 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:24:22,167 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:24:22,167 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:24:22,168 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:24:22,168 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:24:22,173 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:24:22,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:24:22,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:24:22,174 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:24:22,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:24:22,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:24:22,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:24:22,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:24:22,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:24:22,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:24:22,176 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:24:22,176 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:24:22,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:24:22,178 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:24:22,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:24:22,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:24:22,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:24:22,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:24:22,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:24:22,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:24:22,182 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:24:22,182 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:24:22,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:24:22,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:24:22,183 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:24:22,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:24:22,184 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_372787a0-a687-40fa-8bf1-b310f5c18ce1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2024-11-09 01:24:22,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:24:22,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:24:22,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:24:22,454 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:24:22,455 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:24:22,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c Unable to find full path for "g++" [2024-11-09 01:24:24,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:24:25,038 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:24:25,038 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2024-11-09 01:24:25,072 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/data/e61332b07/c999e6ba0c474c4b915678d7273017de/FLAG07a2acc67 [2024-11-09 01:24:25,096 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/data/e61332b07/c999e6ba0c474c4b915678d7273017de [2024-11-09 01:24:25,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:24:25,102 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:24:25,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:24:25,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:24:25,113 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:24:25,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:24:25" (1/1) ... [2024-11-09 01:24:25,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6b7f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:25, skipping insertion in model container [2024-11-09 01:24:25,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:24:25" (1/1) ... [2024-11-09 01:24:25,207 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:24:25,652 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_372787a0-a687-40fa-8bf1-b310f5c18ce1/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2024-11-09 01:24:25,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:24:25,972 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:24:25,984 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2024-11-09 01:24:25,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [147] [2024-11-09 01:24:25,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [165] [2024-11-09 01:24:25,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [832] [2024-11-09 01:24:25,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [952] [2024-11-09 01:24:25,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [961] [2024-11-09 01:24:25,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2404] [2024-11-09 01:24:25,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2442] [2024-11-09 01:24:25,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2790] [2024-11-09 01:24:25,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2976] [2024-11-09 01:24:26,068 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_372787a0-a687-40fa-8bf1-b310f5c18ce1/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2024-11-09 01:24:26,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:24:26,223 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:24:26,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26 WrapperNode [2024-11-09 01:24:26,223 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:24:26,225 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:24:26,225 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:24:26,225 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:24:26,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,333 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 806 [2024-11-09 01:24:26,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:24:26,334 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:24:26,335 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:24:26,335 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:24:26,346 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,387 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,407 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:24:26,408 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:24:26,408 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:24:26,408 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:24:26,409 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (1/1) ... [2024-11-09 01:24:26,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:24:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:26,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:24:26,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:24:26,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:24:26,496 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-09 01:24:26,496 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-09 01:24:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-09 01:24:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-09 01:24:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-09 01:24:26,497 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-09 01:24:26,497 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-09 01:24:26,501 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-09 01:24:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-09 01:24:26,502 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-09 01:24:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-09 01:24:26,502 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-09 01:24:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-09 01:24:26,502 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-09 01:24:26,502 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-09 01:24:26,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-09 01:24:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-09 01:24:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-09 01:24:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-09 01:24:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-09 01:24:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-09 01:24:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-09 01:24:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-09 01:24:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-09 01:24:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-09 01:24:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-09 01:24:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-09 01:24:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-09 01:24:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-09 01:24:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-09 01:24:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-09 01:24:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-09 01:24:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-09 01:24:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-09 01:24:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-09 01:24:26,505 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-09 01:24:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:24:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-09 01:24:26,505 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-09 01:24:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-09 01:24:26,509 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-09 01:24:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-09 01:24:26,510 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-09 01:24:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-09 01:24:26,510 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-09 01:24:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:24:26,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:24:26,510 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-09 01:24:26,511 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-09 01:24:26,667 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:24:26,670 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:24:28,132 INFO L? ?]: Removed 429 outVars from TransFormulas that were not future-live. [2024-11-09 01:24:28,132 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:24:29,114 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:24:29,118 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 01:24:29,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:24:29 BoogieIcfgContainer [2024-11-09 01:24:29,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:24:29,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:24:29,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:24:29,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:24:29,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:24:25" (1/3) ... [2024-11-09 01:24:29,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8aa255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:24:29, skipping insertion in model container [2024-11-09 01:24:29,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:24:26" (2/3) ... [2024-11-09 01:24:29,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8aa255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:24:29, skipping insertion in model container [2024-11-09 01:24:29,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:24:29" (3/3) ... [2024-11-09 01:24:29,135 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2024-11-09 01:24:29,157 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:24:29,157 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:24:29,250 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:24:29,257 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;@7ffa03bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:24:29,258 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:24:29,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2024-11-09 01:24:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 01:24:29,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:29,282 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] [2024-11-09 01:24:29,283 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:29,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1906033527, now seen corresponding path program 1 times [2024-11-09 01:24:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:29,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31963141] [2024-11-09 01:24:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:29,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:30,313 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 01:24:30,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31963141] [2024-11-09 01:24:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31963141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:30,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:24:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:24:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836022586] [2024-11-09 01:24:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:30,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:24:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:24:30,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:24:30,376 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 01:24:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:31,187 INFO L93 Difference]: Finished difference Result 1057 states and 1712 transitions. [2024-11-09 01:24:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:24:31,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2024-11-09 01:24:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:31,221 INFO L225 Difference]: With dead ends: 1057 [2024-11-09 01:24:31,221 INFO L226 Difference]: Without dead ends: 682 [2024-11-09 01:24:31,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 01:24:31,244 INFO L432 NwaCegarLoop]: 599 mSDtfsCounter, 486 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:31,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1685 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:24:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2024-11-09 01:24:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 675. [2024-11-09 01:24:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 457 states have (on average 1.5229759299781183) internal successors, (696), 487 states have internal predecessors, (696), 178 states have call successors, (178), 43 states have call predecessors, (178), 39 states have return successors, (179), 169 states have call predecessors, (179), 174 states have call successors, (179) [2024-11-09 01:24:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1053 transitions. [2024-11-09 01:24:31,423 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1053 transitions. Word has length 63 [2024-11-09 01:24:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:31,424 INFO L471 AbstractCegarLoop]: Abstraction has 675 states and 1053 transitions. [2024-11-09 01:24:31,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 01:24:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1053 transitions. [2024-11-09 01:24:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 01:24:31,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:31,430 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] [2024-11-09 01:24:31,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:24:31,435 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:31,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1518028482, now seen corresponding path program 1 times [2024-11-09 01:24:31,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:31,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136366396] [2024-11-09 01:24:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:31,953 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 01:24:31,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:31,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136366396] [2024-11-09 01:24:31,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136366396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:31,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:24:31,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:24:31,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356633943] [2024-11-09 01:24:31,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:31,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:24:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:24:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:24:31,962 INFO L87 Difference]: Start difference. First operand 675 states and 1053 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:24:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:32,199 INFO L93 Difference]: Finished difference Result 1112 states and 1748 transitions. [2024-11-09 01:24:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:24:32,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2024-11-09 01:24:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:32,217 INFO L225 Difference]: With dead ends: 1112 [2024-11-09 01:24:32,217 INFO L226 Difference]: Without dead ends: 679 [2024-11-09 01:24:32,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:24:32,227 INFO L432 NwaCegarLoop]: 555 mSDtfsCounter, 0 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:32,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1663 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:24:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2024-11-09 01:24:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2024-11-09 01:24:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 461 states have (on average 1.5184381778741864) internal successors, (700), 491 states have internal predecessors, (700), 178 states have call successors, (178), 43 states have call predecessors, (178), 39 states have return successors, (179), 169 states have call predecessors, (179), 174 states have call successors, (179) [2024-11-09 01:24:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1057 transitions. [2024-11-09 01:24:32,309 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1057 transitions. Word has length 68 [2024-11-09 01:24:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:32,310 INFO L471 AbstractCegarLoop]: Abstraction has 679 states and 1057 transitions. [2024-11-09 01:24:32,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:24:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1057 transitions. [2024-11-09 01:24:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 01:24:32,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:32,314 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] [2024-11-09 01:24:32,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:24:32,315 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:32,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:32,316 INFO L85 PathProgramCache]: Analyzing trace with hash -293437356, now seen corresponding path program 1 times [2024-11-09 01:24:32,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:32,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022530343] [2024-11-09 01:24:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:24:32,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022530343] [2024-11-09 01:24:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022530343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827056691] [2024-11-09 01:24:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:32,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:32,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:32,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:24:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:33,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 01:24:33,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:33,700 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 01:24:33,700 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827056691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:33,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:33,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:24:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548450862] [2024-11-09 01:24:33,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:33,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:24:33,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:33,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:24:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:33,708 INFO L87 Difference]: Start difference. First operand 679 states and 1057 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:24:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:34,556 INFO L93 Difference]: Finished difference Result 1121 states and 1749 transitions. [2024-11-09 01:24:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:24:34,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2024-11-09 01:24:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:34,564 INFO L225 Difference]: With dead ends: 1121 [2024-11-09 01:24:34,564 INFO L226 Difference]: Without dead ends: 687 [2024-11-09 01:24:34,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:34,568 INFO L432 NwaCegarLoop]: 624 mSDtfsCounter, 425 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:34,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1699 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 01:24:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-11-09 01:24:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 683. [2024-11-09 01:24:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 463 states have (on average 1.5161987041036717) internal successors, (702), 494 states have internal predecessors, (702), 178 states have call successors, (178), 44 states have call predecessors, (178), 41 states have return successors, (180), 169 states have call predecessors, (180), 174 states have call successors, (180) [2024-11-09 01:24:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1060 transitions. [2024-11-09 01:24:34,620 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1060 transitions. Word has length 72 [2024-11-09 01:24:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:34,621 INFO L471 AbstractCegarLoop]: Abstraction has 683 states and 1060 transitions. [2024-11-09 01:24:34,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 01:24:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1060 transitions. [2024-11-09 01:24:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 01:24:34,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:34,625 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] [2024-11-09 01:24:34,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 01:24:34,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:34,826 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:34,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:34,827 INFO L85 PathProgramCache]: Analyzing trace with hash 27765753, now seen corresponding path program 1 times [2024-11-09 01:24:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:34,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304725980] [2024-11-09 01:24:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:24:35,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304725980] [2024-11-09 01:24:35,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304725980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368789476] [2024-11-09 01:24:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:35,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:35,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:35,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:35,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:24:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:35,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:24:35,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:35,840 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 01:24:35,841 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368789476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:35,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:35,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 01:24:35,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773199670] [2024-11-09 01:24:35,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:35,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:24:35,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:24:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:24:35,847 INFO L87 Difference]: Start difference. First operand 683 states and 1060 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:24:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:36,197 INFO L93 Difference]: Finished difference Result 1228 states and 1936 transitions. [2024-11-09 01:24:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:24:36,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2024-11-09 01:24:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:36,205 INFO L225 Difference]: With dead ends: 1228 [2024-11-09 01:24:36,205 INFO L226 Difference]: Without dead ends: 687 [2024-11-09 01:24:36,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 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 01:24:36,210 INFO L432 NwaCegarLoop]: 589 mSDtfsCounter, 261 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:36,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1548 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:24:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-11-09 01:24:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 683. [2024-11-09 01:24:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 463 states have (on average 1.4859611231101513) internal successors, (688), 494 states have internal predecessors, (688), 178 states have call successors, (178), 44 states have call predecessors, (178), 41 states have return successors, (180), 169 states have call predecessors, (180), 174 states have call successors, (180) [2024-11-09 01:24:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1046 transitions. [2024-11-09 01:24:36,257 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1046 transitions. Word has length 73 [2024-11-09 01:24:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:36,258 INFO L471 AbstractCegarLoop]: Abstraction has 683 states and 1046 transitions. [2024-11-09 01:24:36,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:24:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1046 transitions. [2024-11-09 01:24:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 01:24:36,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:36,261 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 01:24:36,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:24:36,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:36,462 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:36,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash 767623769, now seen corresponding path program 1 times [2024-11-09 01:24:36,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:36,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678097089] [2024-11-09 01:24:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:24:36,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:36,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678097089] [2024-11-09 01:24:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678097089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:36,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817600223] [2024-11-09 01:24:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:36,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:36,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:24:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:37,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 01:24:37,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:24:37,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:24:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:24:38,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817600223] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:38,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:24:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2024-11-09 01:24:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596491475] [2024-11-09 01:24:38,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:38,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 01:24:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 01:24:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-09 01:24:38,019 INFO L87 Difference]: Start difference. First operand 683 states and 1046 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:24:41,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:41,923 INFO L93 Difference]: Finished difference Result 1566 states and 2480 transitions. [2024-11-09 01:24:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 01:24:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2024-11-09 01:24:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:41,940 INFO L225 Difference]: With dead ends: 1566 [2024-11-09 01:24:41,940 INFO L226 Difference]: Without dead ends: 1206 [2024-11-09 01:24:41,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-09 01:24:41,949 INFO L432 NwaCegarLoop]: 589 mSDtfsCounter, 2363 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 1087 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1087 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:41,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2440 Valid, 2552 Invalid, 2874 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1087 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 01:24:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2024-11-09 01:24:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1183. [2024-11-09 01:24:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 822 states have (on average 1.5036496350364963) internal successors, (1236), 869 states have internal predecessors, (1236), 288 states have call successors, (288), 73 states have call predecessors, (288), 72 states have return successors, (325), 276 states have call predecessors, (325), 283 states have call successors, (325) [2024-11-09 01:24:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1849 transitions. [2024-11-09 01:24:42,106 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1849 transitions. Word has length 75 [2024-11-09 01:24:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:42,107 INFO L471 AbstractCegarLoop]: Abstraction has 1183 states and 1849 transitions. [2024-11-09 01:24:42,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:24:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1849 transitions. [2024-11-09 01:24:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-09 01:24:42,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:42,110 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 01:24:42,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:24:42,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:42,315 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:42,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1269919036, now seen corresponding path program 1 times [2024-11-09 01:24:42,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:42,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334523227] [2024-11-09 01:24:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:42,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:24:42,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334523227] [2024-11-09 01:24:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334523227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535136248] [2024-11-09 01:24:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:42,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:42,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:42,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:42,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:24:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:43,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:24:43,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:24:43,308 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:43,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535136248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:43,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:43,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:24:43,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354470322] [2024-11-09 01:24:43,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:43,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:24:43,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:24:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:24:43,310 INFO L87 Difference]: Start difference. First operand 1183 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:24:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:43,681 INFO L93 Difference]: Finished difference Result 3386 states and 5439 transitions. [2024-11-09 01:24:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:24:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2024-11-09 01:24:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:43,709 INFO L225 Difference]: With dead ends: 3386 [2024-11-09 01:24:43,711 INFO L226 Difference]: Without dead ends: 2215 [2024-11-09 01:24:43,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 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 01:24:43,722 INFO L432 NwaCegarLoop]: 777 mSDtfsCounter, 459 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:43,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1306 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:24:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2024-11-09 01:24:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2159. [2024-11-09 01:24:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 1510 states have (on average 1.5119205298013245) internal successors, (2283), 1605 states have internal predecessors, (2283), 512 states have call successors, (512), 131 states have call predecessors, (512), 136 states have return successors, (604), 494 states have call predecessors, (604), 507 states have call successors, (604) [2024-11-09 01:24:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3399 transitions. [2024-11-09 01:24:43,910 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3399 transitions. Word has length 76 [2024-11-09 01:24:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:43,911 INFO L471 AbstractCegarLoop]: Abstraction has 2159 states and 3399 transitions. [2024-11-09 01:24:43,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 01:24:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3399 transitions. [2024-11-09 01:24:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 01:24:43,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:43,914 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] [2024-11-09 01:24:43,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 01:24:44,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:44,115 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:44,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash 555959506, now seen corresponding path program 1 times [2024-11-09 01:24:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:44,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998135072] [2024-11-09 01:24:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:44,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:24:44,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:44,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998135072] [2024-11-09 01:24:44,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998135072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:44,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156787505] [2024-11-09 01:24:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:44,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:44,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:44,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:24:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:44,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:24:44,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:44,898 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 01:24:44,899 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:44,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156787505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:44,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:44,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:24:44,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565532918] [2024-11-09 01:24:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:44,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:24:44,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:24:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:24:44,902 INFO L87 Difference]: Start difference. First operand 2159 states and 3399 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:24:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:45,256 INFO L93 Difference]: Finished difference Result 5054 states and 8065 transitions. [2024-11-09 01:24:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:24:45,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2024-11-09 01:24:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:45,283 INFO L225 Difference]: With dead ends: 5054 [2024-11-09 01:24:45,283 INFO L226 Difference]: Without dead ends: 2907 [2024-11-09 01:24:45,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 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 01:24:45,300 INFO L432 NwaCegarLoop]: 548 mSDtfsCounter, 519 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:45,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1006 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:24:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2024-11-09 01:24:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2863. [2024-11-09 01:24:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (795), 646 states have call predecessors, (795), 662 states have call successors, (795) [2024-11-09 01:24:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4526 transitions. [2024-11-09 01:24:45,556 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4526 transitions. Word has length 75 [2024-11-09 01:24:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:45,557 INFO L471 AbstractCegarLoop]: Abstraction has 2863 states and 4526 transitions. [2024-11-09 01:24:45,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 01:24:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4526 transitions. [2024-11-09 01:24:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 01:24:45,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:45,560 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 01:24:45,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 01:24:45,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:45,764 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:45,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:45,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1793214015, now seen corresponding path program 1 times [2024-11-09 01:24:45,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:45,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694428837] [2024-11-09 01:24:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:45,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:24:46,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:46,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694428837] [2024-11-09 01:24:46,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694428837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070158291] [2024-11-09 01:24:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:46,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:46,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:46,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:24:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:46,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 01:24:46,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:24:46,767 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:46,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070158291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:46,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:46,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:24:46,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436067245] [2024-11-09 01:24:46,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:46,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:24:46,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:24:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:46,770 INFO L87 Difference]: Start difference. First operand 2863 states and 4526 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 01:24:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:47,605 INFO L93 Difference]: Finished difference Result 5145 states and 8164 transitions. [2024-11-09 01:24:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:24:47,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2024-11-09 01:24:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:47,634 INFO L225 Difference]: With dead ends: 5145 [2024-11-09 01:24:47,635 INFO L226 Difference]: Without dead ends: 2871 [2024-11-09 01:24:47,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:24:47,650 INFO L432 NwaCegarLoop]: 653 mSDtfsCounter, 396 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:47,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2323 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:24:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2024-11-09 01:24:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2863. [2024-11-09 01:24:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (791), 646 states have call predecessors, (791), 662 states have call successors, (791) [2024-11-09 01:24:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4522 transitions. [2024-11-09 01:24:47,918 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4522 transitions. Word has length 79 [2024-11-09 01:24:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:47,919 INFO L471 AbstractCegarLoop]: Abstraction has 2863 states and 4522 transitions. [2024-11-09 01:24:47,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 01:24:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4522 transitions. [2024-11-09 01:24:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 01:24:47,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:47,923 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:24:47,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 01:24:48,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:48,124 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:48,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash -772136922, now seen corresponding path program 1 times [2024-11-09 01:24:48,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:48,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582763423] [2024-11-09 01:24:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:24:48,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:48,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582763423] [2024-11-09 01:24:48,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582763423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:48,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021546879] [2024-11-09 01:24:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:48,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:48,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:48,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:24:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:48,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 01:24:48,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 01:24:48,938 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:48,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021546879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:48,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 01:24:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112036794] [2024-11-09 01:24:48,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:48,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:24:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:24:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:48,941 INFO L87 Difference]: Start difference. First operand 2863 states and 4522 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-09 01:24:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:49,349 INFO L93 Difference]: Finished difference Result 5342 states and 8510 transitions. [2024-11-09 01:24:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:24:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2024-11-09 01:24:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:49,376 INFO L225 Difference]: With dead ends: 5342 [2024-11-09 01:24:49,376 INFO L226 Difference]: Without dead ends: 2919 [2024-11-09 01:24:49,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:49,393 INFO L432 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:49,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2166 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:24:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2024-11-09 01:24:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2907. [2024-11-09 01:24:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2045 states have (on average 1.512958435207824) internal successors, (3094), 2178 states have internal predecessors, (3094), 667 states have call successors, (667), 170 states have call predecessors, (667), 194 states have return successors, (831), 654 states have call predecessors, (831), 662 states have call successors, (831) [2024-11-09 01:24:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4592 transitions. [2024-11-09 01:24:49,613 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4592 transitions. Word has length 99 [2024-11-09 01:24:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:49,614 INFO L471 AbstractCegarLoop]: Abstraction has 2907 states and 4592 transitions. [2024-11-09 01:24:49,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-09 01:24:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4592 transitions. [2024-11-09 01:24:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 01:24:49,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:49,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:49,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:24:49,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:49,823 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:49,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:49,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1163586975, now seen corresponding path program 1 times [2024-11-09 01:24:49,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:49,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025601072] [2024-11-09 01:24:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 01:24:50,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:50,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025601072] [2024-11-09 01:24:50,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025601072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:50,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176223011] [2024-11-09 01:24:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:50,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:50,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:50,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:50,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:24:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:50,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:24:50,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 01:24:50,805 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:50,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176223011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:50,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:50,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-09 01:24:50,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955764127] [2024-11-09 01:24:50,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:50,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:24:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:24:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:50,807 INFO L87 Difference]: Start difference. First operand 2907 states and 4592 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 01:24:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:51,251 INFO L93 Difference]: Finished difference Result 6573 states and 10566 transitions. [2024-11-09 01:24:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:24:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2024-11-09 01:24:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:51,294 INFO L225 Difference]: With dead ends: 6573 [2024-11-09 01:24:51,295 INFO L226 Difference]: Without dead ends: 3678 [2024-11-09 01:24:51,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:51,318 INFO L432 NwaCegarLoop]: 767 mSDtfsCounter, 528 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:51,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1226 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:24:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2024-11-09 01:24:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3622. [2024-11-09 01:24:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 2558 states have (on average 1.5152462861610634) internal successors, (3876), 2725 states have internal predecessors, (3876), 823 states have call successors, (823), 207 states have call predecessors, (823), 240 states have return successors, (1035), 809 states have call predecessors, (1035), 818 states have call successors, (1035) [2024-11-09 01:24:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5734 transitions. [2024-11-09 01:24:51,658 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5734 transitions. Word has length 117 [2024-11-09 01:24:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:51,659 INFO L471 AbstractCegarLoop]: Abstraction has 3622 states and 5734 transitions. [2024-11-09 01:24:51,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 01:24:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5734 transitions. [2024-11-09 01:24:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 01:24:51,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:51,672 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:51,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 01:24:51,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 01:24:51,873 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:51,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1250964949, now seen corresponding path program 1 times [2024-11-09 01:24:51,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:51,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883470246] [2024-11-09 01:24:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:51,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:24:52,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883470246] [2024-11-09 01:24:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883470246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879508505] [2024-11-09 01:24:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:52,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:52,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:52,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:24:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:52,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:24:52,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:24:52,866 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:52,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879508505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:52,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:52,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-09 01:24:52,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295694468] [2024-11-09 01:24:52,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:52,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:24:52,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:24:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:52,869 INFO L87 Difference]: Start difference. First operand 3622 states and 5734 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-09 01:24:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:53,271 INFO L93 Difference]: Finished difference Result 7288 states and 11699 transitions. [2024-11-09 01:24:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:24:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2024-11-09 01:24:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:53,305 INFO L225 Difference]: With dead ends: 7288 [2024-11-09 01:24:53,306 INFO L226 Difference]: Without dead ends: 3678 [2024-11-09 01:24:53,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:24:53,329 INFO L432 NwaCegarLoop]: 833 mSDtfsCounter, 456 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:53,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1365 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:24:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2024-11-09 01:24:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3622. [2024-11-09 01:24:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 2558 states have (on average 1.513291634089132) internal successors, (3871), 2725 states have internal predecessors, (3871), 823 states have call successors, (823), 207 states have call predecessors, (823), 240 states have return successors, (1035), 809 states have call predecessors, (1035), 818 states have call successors, (1035) [2024-11-09 01:24:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5729 transitions. [2024-11-09 01:24:53,690 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5729 transitions. Word has length 118 [2024-11-09 01:24:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:53,691 INFO L471 AbstractCegarLoop]: Abstraction has 3622 states and 5729 transitions. [2024-11-09 01:24:53,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-09 01:24:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5729 transitions. [2024-11-09 01:24:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 01:24:53,699 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:53,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:53,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 01:24:53,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 01:24:53,904 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:53,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash -505804103, now seen corresponding path program 1 times [2024-11-09 01:24:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176818836] [2024-11-09 01:24:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 01:24:54,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:54,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176818836] [2024-11-09 01:24:54,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176818836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:54,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070831207] [2024-11-09 01:24:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:54,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:54,198 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:54,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:24:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:54,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 01:24:54,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:24:54,905 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:24:54,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070831207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:24:54,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:24:54,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-09 01:24:54,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104456356] [2024-11-09 01:24:54,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:24:54,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 01:24:54,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:54,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 01:24:54,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-09 01:24:54,908 INFO L87 Difference]: Start difference. First operand 3622 states and 5729 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-09 01:24:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:58,607 INFO L93 Difference]: Finished difference Result 8135 states and 13034 transitions. [2024-11-09 01:24:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 01:24:58,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2024-11-09 01:24:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:58,653 INFO L225 Difference]: With dead ends: 8135 [2024-11-09 01:24:58,654 INFO L226 Difference]: Without dead ends: 4409 [2024-11-09 01:24:58,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-09 01:24:58,676 INFO L432 NwaCegarLoop]: 403 mSDtfsCounter, 1259 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 3813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:58,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 1725 Invalid, 3813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 01:24:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2024-11-09 01:24:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 3689. [2024-11-09 01:24:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 2599 states have (on average 1.5094267025779147) internal successors, (3923), 2770 states have internal predecessors, (3923), 847 states have call successors, (847), 207 states have call predecessors, (847), 242 states have return successors, (1099), 831 states have call predecessors, (1099), 842 states have call successors, (1099) [2024-11-09 01:24:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 5869 transitions. [2024-11-09 01:24:59,111 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 5869 transitions. Word has length 117 [2024-11-09 01:24:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:59,111 INFO L471 AbstractCegarLoop]: Abstraction has 3689 states and 5869 transitions. [2024-11-09 01:24:59,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-09 01:24:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 5869 transitions. [2024-11-09 01:24:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 01:24:59,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:59,122 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:24:59,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 01:24:59,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 01:24:59,323 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:59,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash -609247386, now seen corresponding path program 1 times [2024-11-09 01:24:59,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:59,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136984232] [2024-11-09 01:24:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 01:24:59,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136984232] [2024-11-09 01:24:59,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136984232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121353787] [2024-11-09 01:24:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:59,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:59,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:59,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:59,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:25:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:00,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:25:00,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:25:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:25:00,321 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:25:00,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121353787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:25:00,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:25:00,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-09 01:25:00,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346316888] [2024-11-09 01:25:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:25:00,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:25:00,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:25:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:25:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:25:00,325 INFO L87 Difference]: Start difference. First operand 3689 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:25:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:25:01,259 INFO L93 Difference]: Finished difference Result 7657 states and 12437 transitions. [2024-11-09 01:25:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:25:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2024-11-09 01:25:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:25:01,299 INFO L225 Difference]: With dead ends: 7657 [2024-11-09 01:25:01,300 INFO L226 Difference]: Without dead ends: 4561 [2024-11-09 01:25:01,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:25:01,321 INFO L432 NwaCegarLoop]: 576 mSDtfsCounter, 564 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:25:01,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1306 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:25:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2024-11-09 01:25:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 4451. [2024-11-09 01:25:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 3039 states have (on average 1.4975320829220138) internal successors, (4551), 3261 states have internal predecessors, (4551), 1103 states have call successors, (1103), 279 states have call predecessors, (1103), 308 states have return successors, (1445), 1078 states have call predecessors, (1445), 1096 states have call successors, (1445) [2024-11-09 01:25:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 7099 transitions. [2024-11-09 01:25:01,748 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 7099 transitions. Word has length 123 [2024-11-09 01:25:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:25:01,751 INFO L471 AbstractCegarLoop]: Abstraction has 4451 states and 7099 transitions. [2024-11-09 01:25:01,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:25:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 7099 transitions. [2024-11-09 01:25:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 01:25:01,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:25:01,760 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 01:25:01,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 01:25:01,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 01:25:01,961 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:25:01,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:25:01,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1253068693, now seen corresponding path program 1 times [2024-11-09 01:25:01,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:25:01,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703069800] [2024-11-09 01:25:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:25:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 01:25:02,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:25:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703069800] [2024-11-09 01:25:02,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703069800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:25:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943709773] [2024-11-09 01:25:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:25:02,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:25:02,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:25:02,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:25:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:02,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:25:02,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:25:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:25:02,928 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:25:02,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943709773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:25:02,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:25:02,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-09 01:25:02,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868441449] [2024-11-09 01:25:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:25:02,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:25:02,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:25:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:25:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-09 01:25:02,930 INFO L87 Difference]: Start difference. First operand 4451 states and 7099 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:25:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:25:04,305 INFO L93 Difference]: Finished difference Result 11253 states and 18286 transitions. [2024-11-09 01:25:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:25:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2024-11-09 01:25:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:25:04,385 INFO L225 Difference]: With dead ends: 11253 [2024-11-09 01:25:04,386 INFO L226 Difference]: Without dead ends: 7373 [2024-11-09 01:25:04,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:25:04,418 INFO L432 NwaCegarLoop]: 896 mSDtfsCounter, 516 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:25:04,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1971 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 01:25:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7373 states. [2024-11-09 01:25:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7373 to 7349. [2024-11-09 01:25:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 4938 states have (on average 1.4910895099230457) internal successors, (7363), 5330 states have internal predecessors, (7363), 1906 states have call successors, (1906), 473 states have call predecessors, (1906), 504 states have return successors, (2433), 1857 states have call predecessors, (2433), 1895 states have call successors, (2433) [2024-11-09 01:25:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 11702 transitions. [2024-11-09 01:25:05,232 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 11702 transitions. Word has length 124 [2024-11-09 01:25:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:25:05,232 INFO L471 AbstractCegarLoop]: Abstraction has 7349 states and 11702 transitions. [2024-11-09 01:25:05,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-11-09 01:25:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 11702 transitions. [2024-11-09 01:25:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 01:25:05,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:25:05,244 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 01:25:05,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 01:25:05,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 01:25:05,445 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:25:05,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:25:05,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1973816036, now seen corresponding path program 1 times [2024-11-09 01:25:05,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:25:05,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855186336] [2024-11-09 01:25:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:05,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:25:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 01:25:05,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:25:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855186336] [2024-11-09 01:25:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855186336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:25:05,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009041344] [2024-11-09 01:25:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:05,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:25:05,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:25:05,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:25:05,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:25:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:06,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 01:25:06,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:25:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:25:06,465 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:25:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009041344] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:25:06,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:25:06,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2024-11-09 01:25:06,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590156025] [2024-11-09 01:25:06,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:25:06,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 01:25:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:25:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 01:25:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-09 01:25:06,469 INFO L87 Difference]: Start difference. First operand 7349 states and 11702 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 01:25:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:25:08,041 INFO L93 Difference]: Finished difference Result 17922 states and 28656 transitions. [2024-11-09 01:25:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 01:25:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2024-11-09 01:25:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:25:08,132 INFO L225 Difference]: With dead ends: 17922 [2024-11-09 01:25:08,132 INFO L226 Difference]: Without dead ends: 11166 [2024-11-09 01:25:08,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-11-09 01:25:08,198 INFO L432 NwaCegarLoop]: 610 mSDtfsCounter, 515 mSDsluCounter, 3466 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 4076 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:25:08,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 4076 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:25:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11166 states. [2024-11-09 01:25:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11166 to 10267. [2024-11-09 01:25:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10267 states, 6887 states have (on average 1.4955713663423842) internal successors, (10300), 7428 states have internal predecessors, (10300), 2677 states have call successors, (2677), 667 states have call predecessors, (2677), 702 states have return successors, (3374), 2627 states have call predecessors, (3374), 2660 states have call successors, (3374) [2024-11-09 01:25:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10267 states to 10267 states and 16351 transitions. [2024-11-09 01:25:09,288 INFO L78 Accepts]: Start accepts. Automaton has 10267 states and 16351 transitions. Word has length 125 [2024-11-09 01:25:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:25:09,289 INFO L471 AbstractCegarLoop]: Abstraction has 10267 states and 16351 transitions. [2024-11-09 01:25:09,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-09 01:25:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 10267 states and 16351 transitions. [2024-11-09 01:25:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 01:25:09,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:25:09,301 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 01:25:09,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 01:25:09,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 01:25:09,501 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:25:09,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:25:09,502 INFO L85 PathProgramCache]: Analyzing trace with hash 418398395, now seen corresponding path program 1 times [2024-11-09 01:25:09,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:25:09,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205972863] [2024-11-09 01:25:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:09,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:25:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 01:25:09,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:25:09,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205972863] [2024-11-09 01:25:09,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205972863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:25:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300852032] [2024-11-09 01:25:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:09,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:25:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:25:09,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:25:09,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:25:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:10,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 01:25:10,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:25:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:25:10,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:25:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 01:25:10,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300852032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:25:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329924543] [2024-11-09 01:25:11,022 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2024-11-09 01:25:11,022 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:25:11,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:25:11,033 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:25:11,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:25:34,153 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 652 for LOIs [2024-11-09 01:26:27,218 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 53 for LOIs [2024-11-09 01:26:27,226 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 41 for LOIs [2024-11-09 01:26:27,654 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 35 for LOIs [2024-11-09 01:26:27,658 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 444 for LOIs [2024-11-09 01:26:28,184 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 676 for LOIs [2024-11-09 01:26:31,922 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 591 for LOIs [2024-11-09 01:26:38,511 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 565 for LOIs [2024-11-09 01:26:39,019 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2024-11-09 01:26:39,036 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 17 for LOIs [2024-11-09 01:26:39,038 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 565 for LOIs [2024-11-09 01:26:48,084 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 569 for LOIs [2024-11-09 01:26:48,738 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 497 for LOIs [2024-11-09 01:26:49,048 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:27:04,766 WARN L286 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 591 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:27:11,216 WARN L286 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 591 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:27:17,168 WARN L286 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 565 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:27:36,798 WARN L286 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 567 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:27:42,982 WARN L286 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 567 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:27:49,022 WARN L286 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 569 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:27:55,128 WARN L286 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 569 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:28:28,154 WARN L286 SmtUtils]: Spent 24.27s on a formula simplification. DAG size of input: 652 DAG size of output: 624 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:28:56,606 WARN L286 SmtUtils]: Spent 27.37s on a formula simplification. DAG size of input: 661 DAG size of output: 633 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:29:25,815 WARN L286 SmtUtils]: Spent 27.68s on a formula simplification. DAG size of input: 666 DAG size of output: 635 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:29:54,715 WARN L286 SmtUtils]: Spent 27.35s on a formula simplification. DAG size of input: 669 DAG size of output: 635 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:30:25,633 WARN L286 SmtUtils]: Spent 27.59s on a formula simplification. DAG size of input: 668 DAG size of output: 629 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:31:10,794 WARN L286 SmtUtils]: Spent 44.38s on a formula simplification. DAG size of input: 676 DAG size of output: 639 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:31:56,595 WARN L286 SmtUtils]: Spent 44.97s on a formula simplification. DAG size of input: 707 DAG size of output: 670 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:32:23,304 WARN L286 SmtUtils]: Spent 25.11s on a formula simplification. DAG size of input: 669 DAG size of output: 631 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:32:50,905 WARN L286 SmtUtils]: Spent 25.97s on a formula simplification. DAG size of input: 669 DAG size of output: 631 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:32:57,730 WARN L286 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 626 DAG size of output: 588 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:33:04,255 WARN L286 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 622 DAG size of output: 586 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:33:14,926 WARN L286 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 444 DAG size of output: 434 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:33:25,470 WARN L286 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 470 DAG size of output: 465 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:33:50,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '185997#(and (<= 1 |#StackHeapBarrier|) (or (and (not (= ~calls_0~0 0)) (exists ((|v_old(~currentHeading~0)_AFTER_CALL_52| Int)) (and (not (= |v_old(~currentHeading~0)_AFTER_CALL_52| 1)) (<= |v_old(~currentHeading~0)_AFTER_CALL_52| 2147483647) (<= 0 (+ |v_old(~currentHeading~0)_AFTER_CALL_52| 2147483648)))) (= ~currentHeading~0 1) (not (= ~doorState~0 1)) (= ~currentFloorID~0 1)) (and (exists ((|v_old(~currentHeading~0)_AFTER_CALL_51| Int)) (and (not (= |v_old(~currentHeading~0)_AFTER_CALL_51| 1)) (<= 0 (+ |v_old(~currentHeading~0)_AFTER_CALL_51| 2147483648)) (<= |v_old(~currentHeading~0)_AFTER_CALL_51| 2147483647))) (not (= ~calls_0~0 0)) (= ~currentHeading~0 1) (not (= ~doorState~0 1)) (= ~currentFloorID~0 1))) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (<= 0 (+ ~calls_0~0 2147483648)) (= ~head~0.base 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= ~calls_0~0 2147483647) (= ~cleanupTimeShifts~0 12))' at error location [2024-11-09 01:33:50,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:33:50,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:33:50,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-09 01:33:50,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268637948] [2024-11-09 01:33:50,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:33:50,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:33:50,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:33:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:33:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=5228, Unknown=0, NotChecked=0, Total=5700 [2024-11-09 01:33:50,040 INFO L87 Difference]: Start difference. First operand 10267 states and 16351 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-09 01:34:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:34:07,718 INFO L93 Difference]: Finished difference Result 46314 states and 77878 transitions. [2024-11-09 01:34:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-09 01:34:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2024-11-09 01:34:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:34:08,003 INFO L225 Difference]: With dead ends: 46314 [2024-11-09 01:34:08,003 INFO L226 Difference]: Without dead ends: 31907 [2024-11-09 01:34:08,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 326 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7605 ImplicationChecksByTransitivity, 423.6s TimeCoverageRelationStatistics Valid=1100, Invalid=17532, Unknown=0, NotChecked=0, Total=18632 [2024-11-09 01:34:08,202 INFO L432 NwaCegarLoop]: 687 mSDtfsCounter, 4967 mSDsluCounter, 5568 mSDsCounter, 0 mSdLazyCounter, 12093 mSolverCounterSat, 2016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5112 SdHoareTripleChecker+Valid, 6255 SdHoareTripleChecker+Invalid, 14109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2016 IncrementalHoareTripleChecker+Valid, 12093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:34:08,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5112 Valid, 6255 Invalid, 14109 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2016 Valid, 12093 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2024-11-09 01:34:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31907 states. [2024-11-09 01:34:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31907 to 25586. [2024-11-09 01:34:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25586 states, 17229 states have (on average 1.4959661036624297) internal successors, (25774), 18844 states have internal predecessors, (25774), 6705 states have call successors, (6705), 1491 states have call predecessors, (6705), 1651 states have return successors, (9518), 6092 states have call predecessors, (9518), 6677 states have call successors, (9518) [2024-11-09 01:34:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25586 states to 25586 states and 41997 transitions. [2024-11-09 01:34:11,071 INFO L78 Accepts]: Start accepts. Automaton has 25586 states and 41997 transitions. Word has length 127 [2024-11-09 01:34:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:34:11,072 INFO L471 AbstractCegarLoop]: Abstraction has 25586 states and 41997 transitions. [2024-11-09 01:34:11,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-09 01:34:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 25586 states and 41997 transitions. [2024-11-09 01:34:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-09 01:34:11,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:34:11,087 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1] [2024-11-09 01:34:11,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 01:34:11,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:34:11,289 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:34:11,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:34:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash -790507273, now seen corresponding path program 1 times [2024-11-09 01:34:11,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:34:11,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134639696] [2024-11-09 01:34:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:34:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:34:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 01:34:11,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:34:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134639696] [2024-11-09 01:34:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134639696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:34:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704696569] [2024-11-09 01:34:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:34:11,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:34:11,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:34:11,984 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:34:11,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 01:34:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:12,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:34:12,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:34:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:34:12,598 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:34:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704696569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:34:12,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:34:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 01:34:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316477189] [2024-11-09 01:34:12,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:34:12,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:34:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:34:12,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:34:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:34:12,605 INFO L87 Difference]: Start difference. First operand 25586 states and 41997 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-09 01:34:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:34:15,652 INFO L93 Difference]: Finished difference Result 52146 states and 86973 transitions. [2024-11-09 01:34:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:34:15,652 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), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2024-11-09 01:34:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:34:15,916 INFO L225 Difference]: With dead ends: 52146 [2024-11-09 01:34:15,917 INFO L226 Difference]: Without dead ends: 24467 [2024-11-09 01:34:16,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 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 01:34:16,263 INFO L432 NwaCegarLoop]: 605 mSDtfsCounter, 178 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:34:16,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1551 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:34:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24467 states. [2024-11-09 01:34:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24467 to 24365. [2024-11-09 01:34:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24365 states, 16196 states have (on average 1.4796245986663374) internal successors, (23964), 17817 states have internal predecessors, (23964), 6533 states have call successors, (6533), 1467 states have call predecessors, (6533), 1635 states have return successors, (9299), 5922 states have call predecessors, (9299), 6505 states have call successors, (9299) [2024-11-09 01:34:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24365 states to 24365 states and 39796 transitions. [2024-11-09 01:34:19,558 INFO L78 Accepts]: Start accepts. Automaton has 24365 states and 39796 transitions. Word has length 136 [2024-11-09 01:34:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:34:19,559 INFO L471 AbstractCegarLoop]: Abstraction has 24365 states and 39796 transitions. [2024-11-09 01:34:19,559 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), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-09 01:34:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 24365 states and 39796 transitions. [2024-11-09 01:34:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 01:34:19,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:34:19,576 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:34:19,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 01:34:19,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:34:19,778 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:34:19,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:34:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash -378539156, now seen corresponding path program 1 times [2024-11-09 01:34:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:34:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211145364] [2024-11-09 01:34:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:34:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:34:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 01:34:20,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:34:20,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211145364] [2024-11-09 01:34:20,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211145364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:34:20,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991590852] [2024-11-09 01:34:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:34:20,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:34:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:34:20,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:34:20,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 01:34:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:21,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:34:21,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:34:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 01:34:21,537 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:34:21,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991590852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:34:21,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:34:21,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-09 01:34:21,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977036062] [2024-11-09 01:34:21,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:34:21,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:34:21,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:34:21,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:34:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 01:34:21,544 INFO L87 Difference]: Start difference. First operand 24365 states and 39796 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 01:34:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:34:23,941 INFO L93 Difference]: Finished difference Result 43973 states and 72941 transitions. [2024-11-09 01:34:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:34:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 01:34:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:34:24,142 INFO L225 Difference]: With dead ends: 43973 [2024-11-09 01:34:24,143 INFO L226 Difference]: Without dead ends: 20680 [2024-11-09 01:34:24,606 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 01:34:24,606 INFO L432 NwaCegarLoop]: 546 mSDtfsCounter, 17 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:34:24,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1058 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:34:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2024-11-09 01:34:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 20640. [2024-11-09 01:34:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20640 states, 13908 states have (on average 1.472749496692551) internal successors, (20483), 15159 states have internal predecessors, (20483), 5327 states have call successors, (5327), 1273 states have call predecessors, (5327), 1404 states have return successors, (7578), 4876 states have call predecessors, (7578), 5299 states have call successors, (7578) [2024-11-09 01:34:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20640 states to 20640 states and 33388 transitions. [2024-11-09 01:34:26,866 INFO L78 Accepts]: Start accepts. Automaton has 20640 states and 33388 transitions. Word has length 141 [2024-11-09 01:34:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:34:26,866 INFO L471 AbstractCegarLoop]: Abstraction has 20640 states and 33388 transitions. [2024-11-09 01:34:26,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 01:34:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20640 states and 33388 transitions. [2024-11-09 01:34:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 01:34:26,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:34:26,879 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:34:26,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 01:34:27,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 01:34:27,080 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:34:27,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:34:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1421741059, now seen corresponding path program 1 times [2024-11-09 01:34:27,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:34:27,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880294571] [2024-11-09 01:34:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:34:27,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:34:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 01:34:28,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:34:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880294571] [2024-11-09 01:34:28,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880294571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:34:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040054637] [2024-11-09 01:34:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:34:28,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:34:28,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:34:28,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:34:28,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_372787a0-a687-40fa-8bf1-b310f5c18ce1/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 01:34:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:34:28,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 01:34:28,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:34:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 01:34:28,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:34:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 01:34:29,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040054637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:34:29,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821797000] [2024-11-09 01:34:29,548 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2024-11-09 01:34:29,548 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:34:29,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:34:29,549 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:34:29,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:34:45,170 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 562 for LOIs [2024-11-09 01:35:00,158 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 438 for LOIs [2024-11-09 01:35:01,572 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 591 for LOIs