./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:00:38,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:00:38,930 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:00:38,939 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:00:38,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:00:38,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:00:38,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:00:38,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:00:38,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:00:38,990 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:00:38,991 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:00:38,992 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:00:38,992 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:00:38,993 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:00:38,994 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:00:38,994 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:00:38,995 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:00:38,996 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:00:38,996 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:00:38,997 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:00:38,998 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:00:38,998 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:00:38,999 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:00:39,000 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:00:39,001 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:00:39,001 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:00:39,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:00:39,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:00:39,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:00:39,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:00:39,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:00:39,005 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:00:39,005 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:00:39,005 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:00:39,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:00:39,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:00:39,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:00:39,007 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:00:39,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:00:39,007 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:00:39,008 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:00:39,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:00:39,009 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:00:39,009 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:00:39,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:00:39,009 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_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2023-11-19 05:00:39,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:00:39,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:00:39,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:00:39,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:00:39,419 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:00:39,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2023-11-19 05:00:42,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:00:43,424 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:00:43,424 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2023-11-19 05:00:43,466 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/data/70b6ba758/1b6b55be65d24124af76fc3e9c87ade1/FLAG0045bc006 [2023-11-19 05:00:43,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/data/70b6ba758/1b6b55be65d24124af76fc3e9c87ade1 [2023-11-19 05:00:43,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:00:43,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:00:43,505 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:00:43,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:00:43,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:00:43,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:43" (1/1) ... [2023-11-19 05:00:43,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3329518b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:43, skipping insertion in model container [2023-11-19 05:00:43,516 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:43" (1/1) ... [2023-11-19 05:00:43,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:00:44,170 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2023-11-19 05:00:44,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:00:44,364 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:00:44,377 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-19 05:00:44,379 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [716] [2023-11-19 05:00:44,380 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [754] [2023-11-19 05:00:44,380 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1120] [2023-11-19 05:00:44,381 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1220] [2023-11-19 05:00:44,382 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1340] [2023-11-19 05:00:44,382 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [1358] [2023-11-19 05:00:44,383 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1548] [2023-11-19 05:00:44,383 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1897] [2023-11-19 05:00:44,384 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1906] [2023-11-19 05:00:44,541 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2023-11-19 05:00:44,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:00:44,726 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:00:44,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44 WrapperNode [2023-11-19 05:00:44,727 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:00:44,728 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:00:44,728 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:00:44,728 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:00:44,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,780 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,900 INFO L138 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 927 [2023-11-19 05:00:44,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:00:44,902 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:00:44,902 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:00:44,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:00:44,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,925 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,925 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,957 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:44,990 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:45,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:00:45,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:00:45,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:00:45,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:00:45,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (1/1) ... [2023-11-19 05:00:45,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:00:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:45,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:00:45,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:00:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:00:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-19 05:00:45,138 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-19 05:00:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:00:45,138 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:00:45,139 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:00:45,139 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:00:45,140 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:00:45,140 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:00:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 05:00:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 05:00:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:00:45,142 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:00:45,142 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:00:45,143 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:00:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:00:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:00:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:00:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:00:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:00:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:00:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:00:45,148 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:00:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:00:45,149 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:00:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:00:45,149 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:00:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:00:45,150 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:00:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-19 05:00:45,150 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-19 05:00:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:00:45,150 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:00:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:00:45,151 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:00:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-19 05:00:45,151 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-19 05:00:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:00:45,152 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:00:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:00:45,152 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:00:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:00:45,152 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:00:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:00:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:00:45,153 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:00:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:00:45,153 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:00:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:00:45,154 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:00:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:00:45,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:00:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:00:45,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:00:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:00:45,157 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:00:45,392 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:00:45,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:00:47,058 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:00:48,355 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:00:48,356 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:00:48,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:48 BoogieIcfgContainer [2023-11-19 05:00:48,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:00:48,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:00:48,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:00:48,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:00:48,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:00:43" (1/3) ... [2023-11-19 05:00:48,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cfec20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:48, skipping insertion in model container [2023-11-19 05:00:48,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:44" (2/3) ... [2023-11-19 05:00:48,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cfec20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:48, skipping insertion in model container [2023-11-19 05:00:48,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:48" (3/3) ... [2023-11-19 05:00:48,390 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2023-11-19 05:00:48,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:00:48,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:00:48,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:00:48,538 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3546dc19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:00:48,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:00:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-19 05:00:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 05:00:48,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:48,597 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:48,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:48,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash 882097340, now seen corresponding path program 1 times [2023-11-19 05:00:48,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:48,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816946779] [2023-11-19 05:00:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:48,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:00:50,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816946779] [2023-11-19 05:00:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816946779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:50,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:00:50,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239530112] [2023-11-19 05:00:50,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:50,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:00:50,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:00:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:50,120 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-19 05:00:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:51,772 INFO L93 Difference]: Finished difference Result 1137 states and 1819 transitions. [2023-11-19 05:00:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:00:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2023-11-19 05:00:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:51,814 INFO L225 Difference]: With dead ends: 1137 [2023-11-19 05:00:51,814 INFO L226 Difference]: Without dead ends: 735 [2023-11-19 05:00:51,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:00:51,835 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 520 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:51,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 2828 Invalid, 739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:00:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2023-11-19 05:00:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 729. [2023-11-19 05:00:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 489 states have (on average 1.5010224948875255) internal successors, (734), 519 states have internal predecessors, (734), 194 states have call successors, (194), 49 states have call predecessors, (194), 45 states have return successors, (195), 185 states have call predecessors, (195), 190 states have call successors, (195) [2023-11-19 05:00:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1123 transitions. [2023-11-19 05:00:52,073 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1123 transitions. Word has length 75 [2023-11-19 05:00:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:52,074 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 1123 transitions. [2023-11-19 05:00:52,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-19 05:00:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1123 transitions. [2023-11-19 05:00:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 05:00:52,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:52,089 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:52,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:00:52,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:52,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1268466804, now seen corresponding path program 1 times [2023-11-19 05:00:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:52,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185853909] [2023-11-19 05:00:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:52,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:00:52,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:52,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185853909] [2023-11-19 05:00:52,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185853909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:52,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:52,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:00:52,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856767157] [2023-11-19 05:00:52,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:52,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:00:52,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:00:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:52,931 INFO L87 Difference]: Start difference. First operand 729 states and 1123 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:00:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:54,051 INFO L93 Difference]: Finished difference Result 2150 states and 3374 transitions. [2023-11-19 05:00:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:00:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 81 [2023-11-19 05:00:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:54,077 INFO L225 Difference]: With dead ends: 2150 [2023-11-19 05:00:54,077 INFO L226 Difference]: Without dead ends: 1433 [2023-11-19 05:00:54,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:00:54,095 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 626 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:54,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 2952 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:00:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2023-11-19 05:00:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1365. [2023-11-19 05:00:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 933 states have (on average 1.504823151125402) internal successors, (1404), 991 states have internal predecessors, (1404), 347 states have call successors, (347), 91 states have call predecessors, (347), 84 states have return successors, (376), 320 states have call predecessors, (376), 341 states have call successors, (376) [2023-11-19 05:00:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2127 transitions. [2023-11-19 05:00:54,257 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2127 transitions. Word has length 81 [2023-11-19 05:00:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:54,258 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2127 transitions. [2023-11-19 05:00:54,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:00:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2127 transitions. [2023-11-19 05:00:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 05:00:54,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:54,264 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:00:54,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:54,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash 805634010, now seen corresponding path program 1 times [2023-11-19 05:00:54,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:54,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632404569] [2023-11-19 05:00:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:54,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:00:54,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632404569] [2023-11-19 05:00:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632404569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22472828] [2023-11-19 05:00:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:54,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:54,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:54,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:00:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:55,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:00:55,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:00:55,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:55,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22472828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:55,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:55,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:00:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399371924] [2023-11-19 05:00:55,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:55,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:00:55,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:00:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:55,345 INFO L87 Difference]: Start difference. First operand 1365 states and 2127 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:00:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:55,836 INFO L93 Difference]: Finished difference Result 3905 states and 6243 transitions. [2023-11-19 05:00:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:00:55,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 79 [2023-11-19 05:00:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:55,870 INFO L225 Difference]: With dead ends: 3905 [2023-11-19 05:00:55,870 INFO L226 Difference]: Without dead ends: 2552 [2023-11-19 05:00:55,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:55,891 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 560 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:55,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1127 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:00:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2023-11-19 05:00:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2477. [2023-11-19 05:00:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 1703 states have (on average 1.5190839694656488) internal successors, (2587), 1819 states have internal predecessors, (2587), 616 states have call successors, (616), 162 states have call predecessors, (616), 157 states have return successors, (696), 571 states have call predecessors, (696), 610 states have call successors, (696) [2023-11-19 05:00:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3899 transitions. [2023-11-19 05:00:56,184 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3899 transitions. Word has length 79 [2023-11-19 05:00:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:56,185 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 3899 transitions. [2023-11-19 05:00:56,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:00:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3899 transitions. [2023-11-19 05:00:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-19 05:00:56,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:56,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:56,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:56,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:56,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:56,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:56,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1331937780, now seen corresponding path program 1 times [2023-11-19 05:00:56,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:56,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348005661] [2023-11-19 05:00:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:56,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:00:56,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348005661] [2023-11-19 05:00:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348005661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512819141] [2023-11-19 05:00:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:56,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:56,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:56,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:56,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:00:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:57,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:00:57,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:00:57,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:57,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512819141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:57,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:57,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:00:57,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067902562] [2023-11-19 05:00:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:57,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:00:57,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:00:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:57,450 INFO L87 Difference]: Start difference. First operand 2477 states and 3899 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:00:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:57,897 INFO L93 Difference]: Finished difference Result 5564 states and 8852 transitions. [2023-11-19 05:00:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:00:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 80 [2023-11-19 05:00:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:57,935 INFO L225 Difference]: With dead ends: 5564 [2023-11-19 05:00:57,935 INFO L226 Difference]: Without dead ends: 3099 [2023-11-19 05:00:57,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:57,962 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 558 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:57,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1098 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:00:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2023-11-19 05:00:58,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 3056. [2023-11-19 05:00:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 2109 states have (on average 1.530583214793741) internal successors, (3228), 2254 states have internal predecessors, (3228), 753 states have call successors, (753), 196 states have call predecessors, (753), 193 states have return successors, (852), 701 states have call predecessors, (852), 747 states have call successors, (852) [2023-11-19 05:00:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4833 transitions. [2023-11-19 05:00:58,260 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4833 transitions. Word has length 80 [2023-11-19 05:00:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:58,261 INFO L495 AbstractCegarLoop]: Abstraction has 3056 states and 4833 transitions. [2023-11-19 05:00:58,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:00:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4833 transitions. [2023-11-19 05:00:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 05:00:58,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:58,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:58,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:58,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:58,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:58,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -922219511, now seen corresponding path program 1 times [2023-11-19 05:00:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:58,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52370268] [2023-11-19 05:00:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:00:59,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:59,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52370268] [2023-11-19 05:00:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52370268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014343980] [2023-11-19 05:00:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:59,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:59,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:59,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:59,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:00:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:59,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:00:59,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:01:00,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:00,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014343980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:00,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:00,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-19 05:01:00,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259393591] [2023-11-19 05:01:00,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:00,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:00,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:01:00,054 INFO L87 Difference]: Start difference. First operand 3056 states and 4833 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:00,898 INFO L93 Difference]: Finished difference Result 6115 states and 9888 transitions. [2023-11-19 05:01:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2023-11-19 05:01:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:00,954 INFO L225 Difference]: With dead ends: 6115 [2023-11-19 05:01:00,954 INFO L226 Difference]: Without dead ends: 3876 [2023-11-19 05:01:00,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:00,987 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:00,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2387 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:01:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2023-11-19 05:01:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 3459. [2023-11-19 05:01:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 2337 states have (on average 1.5198973042362003) internal successors, (3552), 2541 states have internal predecessors, (3552), 923 states have call successors, (923), 196 states have call predecessors, (923), 198 states have return successors, (1048), 859 states have call predecessors, (1048), 917 states have call successors, (1048) [2023-11-19 05:01:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 5523 transitions. [2023-11-19 05:01:01,406 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 5523 transitions. Word has length 86 [2023-11-19 05:01:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:01,407 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 5523 transitions. [2023-11-19 05:01:01,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:01:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 5523 transitions. [2023-11-19 05:01:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:01:01,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:01,412 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:01,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:01,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:01,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash -743671102, now seen corresponding path program 1 times [2023-11-19 05:01:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:01,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385639888] [2023-11-19 05:01:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:01:02,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385639888] [2023-11-19 05:01:02,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385639888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643445368] [2023-11-19 05:01:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:02,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:02,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:02,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:01:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:03,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:01:03,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:01:03,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:03,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643445368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:03,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:03,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-19 05:01:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097495077] [2023-11-19 05:01:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:03,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:03,227 INFO L87 Difference]: Start difference. First operand 3459 states and 5523 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 05:01:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:04,566 INFO L93 Difference]: Finished difference Result 6124 states and 9813 transitions. [2023-11-19 05:01:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:01:04,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2023-11-19 05:01:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:04,602 INFO L225 Difference]: With dead ends: 6124 [2023-11-19 05:01:04,603 INFO L226 Difference]: Without dead ends: 3498 [2023-11-19 05:01:04,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:01:04,629 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 436 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2940 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:04,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2940 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:01:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2023-11-19 05:01:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3495. [2023-11-19 05:01:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2361 states have (on average 1.5146124523506987) internal successors, (3576), 2561 states have internal predecessors, (3576), 923 states have call successors, (923), 200 states have call predecessors, (923), 210 states have return successors, (1064), 871 states have call predecessors, (1064), 917 states have call successors, (1064) [2023-11-19 05:01:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5563 transitions. [2023-11-19 05:01:04,943 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5563 transitions. Word has length 89 [2023-11-19 05:01:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:04,946 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5563 transitions. [2023-11-19 05:01:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 05:01:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5563 transitions. [2023-11-19 05:01:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 05:01:04,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:04,954 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:04,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:05,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:01:05,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:05,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1015810986, now seen corresponding path program 1 times [2023-11-19 05:01:05,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:05,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928906320] [2023-11-19 05:01:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:01:06,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928906320] [2023-11-19 05:01:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928906320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535204368] [2023-11-19 05:01:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:06,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:06,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:06,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:01:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:06,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 05:01:06,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:01:06,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:01:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:01:07,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535204368] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:07,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:01:07,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2023-11-19 05:01:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919160146] [2023-11-19 05:01:07,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:07,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:01:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:01:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:01:07,134 INFO L87 Difference]: Start difference. First operand 3495 states and 5563 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:01:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:11,173 INFO L93 Difference]: Finished difference Result 9159 states and 15255 transitions. [2023-11-19 05:01:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 05:01:11,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2023-11-19 05:01:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:11,248 INFO L225 Difference]: With dead ends: 9159 [2023-11-19 05:01:11,248 INFO L226 Difference]: Without dead ends: 6871 [2023-11-19 05:01:11,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 05:01:11,282 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 3014 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 1359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3104 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1359 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:11,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3104 Valid, 2670 Invalid, 3284 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1359 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-19 05:01:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2023-11-19 05:01:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5998. [2023-11-19 05:01:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1854), 1280 states have call predecessors, (1854), 1333 states have call successors, (1854) [2023-11-19 05:01:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9693 transitions. [2023-11-19 05:01:11,983 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9693 transitions. Word has length 92 [2023-11-19 05:01:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:11,986 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9693 transitions. [2023-11-19 05:01:11,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:01:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9693 transitions. [2023-11-19 05:01:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 05:01:11,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:11,992 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:12,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:12,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:01:12,210 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:12,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:12,211 INFO L85 PathProgramCache]: Analyzing trace with hash -853809560, now seen corresponding path program 1 times [2023-11-19 05:01:12,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:12,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859352830] [2023-11-19 05:01:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:01:12,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859352830] [2023-11-19 05:01:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859352830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566723050] [2023-11-19 05:01:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:12,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:12,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:12,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:12,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:01:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:13,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:01:13,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:01:13,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:13,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566723050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:13,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:13,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-19 05:01:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76522723] [2023-11-19 05:01:13,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:13,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:13,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:01:13,503 INFO L87 Difference]: Start difference. First operand 5998 states and 9693 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:01:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:14,542 INFO L93 Difference]: Finished difference Result 10805 states and 17544 transitions. [2023-11-19 05:01:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:01:14,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2023-11-19 05:01:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:14,613 INFO L225 Difference]: With dead ends: 10805 [2023-11-19 05:01:14,614 INFO L226 Difference]: Without dead ends: 6014 [2023-11-19 05:01:14,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:14,642 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 419 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:14,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2389 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:01:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2023-11-19 05:01:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 5998. [2023-11-19 05:01:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1846), 1280 states have call predecessors, (1846), 1333 states have call successors, (1846) [2023-11-19 05:01:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9685 transitions. [2023-11-19 05:01:15,386 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9685 transitions. Word has length 96 [2023-11-19 05:01:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:15,387 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9685 transitions. [2023-11-19 05:01:15,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:01:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9685 transitions. [2023-11-19 05:01:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 05:01:15,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:15,399 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:15,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:15,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:15,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 512384276, now seen corresponding path program 1 times [2023-11-19 05:01:15,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:15,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274682009] [2023-11-19 05:01:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:15,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 05:01:16,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:16,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274682009] [2023-11-19 05:01:16,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274682009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:16,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024000142] [2023-11-19 05:01:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:16,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:16,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:16,520 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:16,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:01:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:16,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:01:16,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:01:16,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:16,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024000142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:16,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:16,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-19 05:01:16,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237938995] [2023-11-19 05:01:16,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:16,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:16,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:16,998 INFO L87 Difference]: Start difference. First operand 5998 states and 9685 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:01:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:17,686 INFO L93 Difference]: Finished difference Result 11449 states and 18974 transitions. [2023-11-19 05:01:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:01:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 125 [2023-11-19 05:01:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:17,743 INFO L225 Difference]: With dead ends: 11449 [2023-11-19 05:01:17,743 INFO L226 Difference]: Without dead ends: 6296 [2023-11-19 05:01:17,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:17,774 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 13 mSDsluCounter, 2991 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:17,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3597 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2023-11-19 05:01:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6204. [2023-11-19 05:01:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 4383 states have (on average 1.5144877937485741) internal successors, (6638), 4639 states have internal predecessors, (6638), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1330 states have call predecessors, (2231), 1343 states have call successors, (2231) [2023-11-19 05:01:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 10220 transitions. [2023-11-19 05:01:18,388 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 10220 transitions. Word has length 125 [2023-11-19 05:01:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:18,389 INFO L495 AbstractCegarLoop]: Abstraction has 6204 states and 10220 transitions. [2023-11-19 05:01:18,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:01:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 10220 transitions. [2023-11-19 05:01:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-19 05:01:18,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:18,395 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:18,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:18,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:18,618 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:18,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:18,619 INFO L85 PathProgramCache]: Analyzing trace with hash -629313602, now seen corresponding path program 1 times [2023-11-19 05:01:18,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:18,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603307692] [2023-11-19 05:01:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:18,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 05:01:19,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:19,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603307692] [2023-11-19 05:01:19,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603307692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:19,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910373117] [2023-11-19 05:01:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:19,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:19,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:19,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:19,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:01:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:19,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:01:19,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:01:19,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910373117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:19,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:19,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-19 05:01:19,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166483552] [2023-11-19 05:01:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:19,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:19,856 INFO L87 Difference]: Start difference. First operand 6204 states and 10220 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:01:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:20,513 INFO L93 Difference]: Finished difference Result 11797 states and 19795 transitions. [2023-11-19 05:01:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:01:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2023-11-19 05:01:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:20,567 INFO L225 Difference]: With dead ends: 11797 [2023-11-19 05:01:20,567 INFO L226 Difference]: Without dead ends: 6446 [2023-11-19 05:01:20,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:20,603 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 13 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3641 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:20,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3641 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6446 states. [2023-11-19 05:01:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6446 to 6232. [2023-11-19 05:01:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 4411 states have (on average 1.5112219451371571) internal successors, (6666), 4639 states have internal predecessors, (6666), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1358 states have call predecessors, (2231), 1343 states have call successors, (2231) [2023-11-19 05:01:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 10248 transitions. [2023-11-19 05:01:21,105 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 10248 transitions. Word has length 122 [2023-11-19 05:01:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:21,106 INFO L495 AbstractCegarLoop]: Abstraction has 6232 states and 10248 transitions. [2023-11-19 05:01:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 05:01:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 10248 transitions. [2023-11-19 05:01:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 05:01:21,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:21,112 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:21,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:21,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5906d537-738c-459a-bf77-44c55b4a9834/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:01:21,337 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:21,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2137657864, now seen corresponding path program 1 times [2023-11-19 05:01:21,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:21,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18265387] [2023-11-19 05:01:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat