./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:26:48,786 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:26:48,892 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:26:48,896 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:26:48,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:26:48,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:26:48,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:26:48,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:26:48,932 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:26:48,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:26:48,934 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:26:48,935 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:26:48,936 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:26:48,938 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:26:48,938 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:26:48,939 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:26:48,939 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:26:48,940 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:26:48,940 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:26:48,940 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:26:48,941 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:26:48,945 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:26:48,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:26:48,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:26:48,946 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:26:48,946 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:26:48,947 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:26:48,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:26:48,947 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:26:48,947 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:26:48,948 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:26:48,948 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:26:48,950 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:26:48,951 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:26:48,951 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:26:48,952 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:26:48,952 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:26:48,953 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:26:48,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:26:48,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:26:48,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:26:48,954 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:26:48,954 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:26:48,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:26:48,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:26:48,956 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:26:48,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:26:48,956 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_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2024-11-09 05:26:49,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:26:49,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:26:49,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:26:49,319 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:26:49,320 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:26:49,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c Unable to find full path for "g++" [2024-11-09 05:26:51,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:26:51,587 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:26:51,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2024-11-09 05:26:51,618 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/data/f4b208176/99539d8920d34cbabd236e856a151484/FLAG3e51fd199 [2024-11-09 05:26:51,635 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/data/f4b208176/99539d8920d34cbabd236e856a151484 [2024-11-09 05:26:51,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:26:51,639 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:26:51,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:26:51,641 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:26:51,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:26:51,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:26:51" (1/1) ... [2024-11-09 05:26:51,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17be43fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:51, skipping insertion in model container [2024-11-09 05:26:51,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:26:51" (1/1) ... [2024-11-09 05:26:51,729 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:26:52,497 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2024-11-09 05:26:52,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:26:52,533 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:26:52,544 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2024-11-09 05:26:52,546 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [67] [2024-11-09 05:26:52,547 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [168] [2024-11-09 05:26:52,547 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [520] [2024-11-09 05:26:52,548 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2041] [2024-11-09 05:26:52,548 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2407] [2024-11-09 05:26:52,548 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3068] [2024-11-09 05:26:52,549 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3186] [2024-11-09 05:26:52,549 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3195] [2024-11-09 05:26:52,549 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [3230] [2024-11-09 05:26:52,685 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2024-11-09 05:26:52,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:26:52,742 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:26:52,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52 WrapperNode [2024-11-09 05:26:52,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:26:52,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:26:52,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:26:52,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:26:52,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,840 INFO L138 Inliner]: procedures = 91, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 861 [2024-11-09 05:26:52,840 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:26:52,841 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:26:52,841 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:26:52,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:26:52,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,859 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,859 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,877 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:26:52,946 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:26:52,946 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:26:52,946 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:26:52,948 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (1/1) ... [2024-11-09 05:26:52,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:26:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:52,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:26:52,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:26:53,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:26:53,025 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-09 05:26:53,025 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-09 05:26:53,025 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-09 05:26:53,025 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-09 05:26:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-09 05:26:53,026 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-09 05:26:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-09 05:26:53,026 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-09 05:26:53,027 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-09 05:26:53,027 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-09 05:26:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-09 05:26:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-09 05:26:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-09 05:26:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-09 05:26:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-09 05:26:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-09 05:26:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-09 05:26:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-09 05:26:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-09 05:26:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-09 05:26:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-09 05:26:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-09 05:26:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-09 05:26:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-09 05:26:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-09 05:26:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-09 05:26:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-09 05:26:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-09 05:26:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-09 05:26:53,030 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-09 05:26:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-09 05:26:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-09 05:26:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2024-11-09 05:26:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2024-11-09 05:26:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-09 05:26:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-09 05:26:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-09 05:26:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-09 05:26:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-09 05:26:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-09 05:26:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:26:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-09 05:26:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-09 05:26:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-09 05:26:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-09 05:26:53,034 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-09 05:26:53,034 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-09 05:26:53,035 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-09 05:26:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-09 05:26:53,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:26:53,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:26:53,036 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-09 05:26:53,037 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-09 05:26:53,244 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:26:53,249 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:26:54,872 INFO L? ?]: Removed 451 outVars from TransFormulas that were not future-live. [2024-11-09 05:26:54,872 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:26:55,856 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:26:55,856 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:26:55,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:26:55 BoogieIcfgContainer [2024-11-09 05:26:55,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:26:55,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:26:55,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:26:55,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:26:55,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:26:51" (1/3) ... [2024-11-09 05:26:55,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5fb13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:26:55, skipping insertion in model container [2024-11-09 05:26:55,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:26:52" (2/3) ... [2024-11-09 05:26:55,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5fb13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:26:55, skipping insertion in model container [2024-11-09 05:26:55,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:26:55" (3/3) ... [2024-11-09 05:26:55,874 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2024-11-09 05:26:55,910 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:26:55,913 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:26:56,031 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:26:56,040 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@704247b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:26:56,040 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:26:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2024-11-09 05:26:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:26:56,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:56,059 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:26:56,060 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:56,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash 49381484, now seen corresponding path program 1 times [2024-11-09 05:26:56,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:56,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759245392] [2024-11-09 05:26:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:56,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:26:56,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759245392] [2024-11-09 05:26:56,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759245392] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:56,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374833328] [2024-11-09 05:26:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:56,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:56,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:56,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:56,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:26:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:57,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:26:57,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:26:57,543 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:26:57,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374833328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:57,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:26:57,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:26:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605736242] [2024-11-09 05:26:57,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:57,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:26:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:57,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:26:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:26:57,579 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:26:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:57,966 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2024-11-09 05:26:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:26:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2024-11-09 05:26:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:57,996 INFO L225 Difference]: With dead ends: 1095 [2024-11-09 05:26:57,997 INFO L226 Difference]: Without dead ends: 707 [2024-11-09 05:26:58,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:26:58,008 INFO L432 NwaCegarLoop]: 581 mSDtfsCounter, 585 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:58,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1069 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:26:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2024-11-09 05:26:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2024-11-09 05:26:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2024-11-09 05:26:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2024-11-09 05:26:58,168 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2024-11-09 05:26:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:58,173 INFO L471 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2024-11-09 05:26:58,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 05:26:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2024-11-09 05:26:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:26:58,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:58,178 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:26:58,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:26:58,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-09 05:26:58,384 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:58,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1915722072, now seen corresponding path program 1 times [2024-11-09 05:26:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:58,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518845703] [2024-11-09 05:26:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:58,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:26:58,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:58,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518845703] [2024-11-09 05:26:58,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518845703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:58,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:58,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:26:58,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735428685] [2024-11-09 05:26:58,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:58,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:26:58,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:58,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:26:58,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:26:58,818 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 05:26:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:59,235 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2024-11-09 05:26:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:26:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2024-11-09 05:26:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:59,248 INFO L225 Difference]: With dead ends: 2057 [2024-11-09 05:26:59,248 INFO L226 Difference]: Without dead ends: 1374 [2024-11-09 05:26:59,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:26:59,254 INFO L432 NwaCegarLoop]: 626 mSDtfsCounter, 576 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:59,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1172 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:26:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2024-11-09 05:26:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2024-11-09 05:26:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2024-11-09 05:26:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2024-11-09 05:26:59,368 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2024-11-09 05:26:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:59,369 INFO L471 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2024-11-09 05:26:59,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 05:26:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2024-11-09 05:26:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 05:26:59,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:59,383 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:26:59,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:26:59,383 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:59,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1107920449, now seen corresponding path program 1 times [2024-11-09 05:26:59,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:59,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878696247] [2024-11-09 05:26:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:59,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:26:59,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878696247] [2024-11-09 05:26:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878696247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:59,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:59,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:26:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423227597] [2024-11-09 05:26:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:59,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:26:59,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:59,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:26:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:26:59,924 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 05:27:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:00,976 INFO L93 Difference]: Finished difference Result 3193 states and 5264 transitions. [2024-11-09 05:27:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:27:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2024-11-09 05:27:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:00,995 INFO L225 Difference]: With dead ends: 3193 [2024-11-09 05:27:00,996 INFO L226 Difference]: Without dead ends: 1915 [2024-11-09 05:27:01,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:27:01,007 INFO L432 NwaCegarLoop]: 617 mSDtfsCounter, 561 mSDsluCounter, 2204 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 2821 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:01,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 2821 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:27:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2024-11-09 05:27:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1882. [2024-11-09 05:27:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1323 states have (on average 1.600151171579743) internal successors, (2117), 1409 states have internal predecessors, (2117), 448 states have call successors, (448), 111 states have call predecessors, (448), 110 states have return successors, (512), 407 states have call predecessors, (512), 443 states have call successors, (512) [2024-11-09 05:27:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3077 transitions. [2024-11-09 05:27:01,141 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3077 transitions. Word has length 70 [2024-11-09 05:27:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:01,143 INFO L471 AbstractCegarLoop]: Abstraction has 1882 states and 3077 transitions. [2024-11-09 05:27:01,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 05:27:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3077 transitions. [2024-11-09 05:27:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 05:27:01,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:01,151 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:01,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:27:01,151 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:01,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:01,152 INFO L85 PathProgramCache]: Analyzing trace with hash 802660098, now seen corresponding path program 1 times [2024-11-09 05:27:01,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:01,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489396633] [2024-11-09 05:27:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:01,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:27:01,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:01,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489396633] [2024-11-09 05:27:01,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489396633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:01,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047562373] [2024-11-09 05:27:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:01,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:01,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:01,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:01,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:27:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:01,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:27:01,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:02,049 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:02,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047562373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:02,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:02,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:27:02,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235940058] [2024-11-09 05:27:02,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:02,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:27:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:27:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:27:02,054 INFO L87 Difference]: Start difference. First operand 1882 states and 3077 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:27:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:02,408 INFO L93 Difference]: Finished difference Result 4643 states and 7714 transitions. [2024-11-09 05:27:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:27:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-11-09 05:27:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:02,438 INFO L225 Difference]: With dead ends: 4643 [2024-11-09 05:27:02,438 INFO L226 Difference]: Without dead ends: 2773 [2024-11-09 05:27:02,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:27:02,451 INFO L432 NwaCegarLoop]: 622 mSDtfsCounter, 551 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:02,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1105 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:27:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2024-11-09 05:27:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2706. [2024-11-09 05:27:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 1911 states have (on average 1.6033490319204604) internal successors, (3064), 2040 states have internal predecessors, (3064), 636 states have call successors, (636), 156 states have call predecessors, (636), 158 states have return successors, (741), 578 states have call predecessors, (741), 631 states have call successors, (741) [2024-11-09 05:27:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 4441 transitions. [2024-11-09 05:27:02,658 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 4441 transitions. Word has length 70 [2024-11-09 05:27:02,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:02,659 INFO L471 AbstractCegarLoop]: Abstraction has 2706 states and 4441 transitions. [2024-11-09 05:27:02,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:27:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 4441 transitions. [2024-11-09 05:27:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 05:27:02,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:02,664 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:02,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:27:02,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:02,865 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:02,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:02,865 INFO L85 PathProgramCache]: Analyzing trace with hash -252228694, now seen corresponding path program 1 times [2024-11-09 05:27:02,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:02,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715995202] [2024-11-09 05:27:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:27:03,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715995202] [2024-11-09 05:27:03,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715995202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439616931] [2024-11-09 05:27:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:03,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:03,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:03,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:27:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:03,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:27:03,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:03,773 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:03,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439616931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:03,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:03,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 05:27:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212076552] [2024-11-09 05:27:03,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:03,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:27:03,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:03,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:27:03,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:27:03,777 INFO L87 Difference]: Start difference. First operand 2706 states and 4441 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 05:27:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:04,563 INFO L93 Difference]: Finished difference Result 7198 states and 12025 transitions. [2024-11-09 05:27:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:27:04,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2024-11-09 05:27:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:04,610 INFO L225 Difference]: With dead ends: 7198 [2024-11-09 05:27:04,610 INFO L226 Difference]: Without dead ends: 4504 [2024-11-09 05:27:04,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:27:04,640 INFO L432 NwaCegarLoop]: 601 mSDtfsCounter, 490 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:04,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 1671 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:27:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2024-11-09 05:27:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4462. [2024-11-09 05:27:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 3146 states have (on average 1.5413223140495869) internal successors, (4849), 3365 states have internal predecessors, (4849), 1046 states have call successors, (1046), 276 states have call predecessors, (1046), 269 states have return successors, (1262), 929 states have call predecessors, (1262), 1038 states have call successors, (1262) [2024-11-09 05:27:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 7157 transitions. [2024-11-09 05:27:05,022 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 7157 transitions. Word has length 71 [2024-11-09 05:27:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:05,023 INFO L471 AbstractCegarLoop]: Abstraction has 4462 states and 7157 transitions. [2024-11-09 05:27:05,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 05:27:05,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 7157 transitions. [2024-11-09 05:27:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 05:27:05,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:05,028 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:05,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:27:05,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:05,233 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:05,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash 572862035, now seen corresponding path program 1 times [2024-11-09 05:27:05,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:05,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055639045] [2024-11-09 05:27:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:05,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:27:05,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055639045] [2024-11-09 05:27:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055639045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:05,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:27:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:27:05,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274031412] [2024-11-09 05:27:05,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:05,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:27:05,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:27:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:27:05,561 INFO L87 Difference]: Start difference. First operand 4462 states and 7157 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 05:27:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:06,054 INFO L93 Difference]: Finished difference Result 9545 states and 15411 transitions. [2024-11-09 05:27:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:27:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 79 [2024-11-09 05:27:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:06,100 INFO L225 Difference]: With dead ends: 9545 [2024-11-09 05:27:06,100 INFO L226 Difference]: Without dead ends: 5095 [2024-11-09 05:27:06,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:27:06,131 INFO L432 NwaCegarLoop]: 652 mSDtfsCounter, 406 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:06,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1644 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2024-11-09 05:27:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 5034. [2024-11-09 05:27:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 3538 states have (on average 1.5146975692481628) internal successors, (5359), 3752 states have internal predecessors, (5359), 1163 states have call successors, (1163), 336 states have call predecessors, (1163), 332 states have return successors, (1512), 1051 states have call predecessors, (1512), 1152 states have call successors, (1512) [2024-11-09 05:27:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 8034 transitions. [2024-11-09 05:27:06,544 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 8034 transitions. Word has length 79 [2024-11-09 05:27:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:06,544 INFO L471 AbstractCegarLoop]: Abstraction has 5034 states and 8034 transitions. [2024-11-09 05:27:06,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 05:27:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 8034 transitions. [2024-11-09 05:27:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-09 05:27:06,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:06,548 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:06,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:27:06,548 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:06,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:06,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1101447005, now seen corresponding path program 1 times [2024-11-09 05:27:06,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:06,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858157284] [2024-11-09 05:27:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:06,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:27:07,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858157284] [2024-11-09 05:27:07,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858157284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:07,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549896997] [2024-11-09 05:27:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:07,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:07,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:07,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:27:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:07,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:27:07,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:27:07,871 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:07,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549896997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:07,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:07,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 05:27:07,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294378524] [2024-11-09 05:27:07,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:07,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:27:07,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:27:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:27:07,875 INFO L87 Difference]: Start difference. First operand 5034 states and 8034 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:27:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:08,341 INFO L93 Difference]: Finished difference Result 8919 states and 14391 transitions. [2024-11-09 05:27:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:27:08,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2024-11-09 05:27:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:08,440 INFO L225 Difference]: With dead ends: 8919 [2024-11-09 05:27:08,441 INFO L226 Difference]: Without dead ends: 5064 [2024-11-09 05:27:08,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:27:08,469 INFO L432 NwaCegarLoop]: 568 mSDtfsCounter, 0 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:08,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1701 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2024-11-09 05:27:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 5064. [2024-11-09 05:27:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 3568 states have (on average 1.5103699551569507) internal successors, (5389), 3782 states have internal predecessors, (5389), 1163 states have call successors, (1163), 336 states have call predecessors, (1163), 332 states have return successors, (1512), 1051 states have call predecessors, (1512), 1152 states have call successors, (1512) [2024-11-09 05:27:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 8064 transitions. [2024-11-09 05:27:08,835 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 8064 transitions. Word has length 80 [2024-11-09 05:27:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:08,836 INFO L471 AbstractCegarLoop]: Abstraction has 5064 states and 8064 transitions. [2024-11-09 05:27:08,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:27:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 8064 transitions. [2024-11-09 05:27:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 05:27:08,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:08,843 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:08,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:27:09,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:09,043 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:09,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1277872232, now seen corresponding path program 1 times [2024-11-09 05:27:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:09,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872788307] [2024-11-09 05:27:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:09,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:27:09,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:09,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872788307] [2024-11-09 05:27:09,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872788307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:09,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24286029] [2024-11-09 05:27:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:09,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:09,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:09,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:27:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:10,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:27:10,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 05:27:10,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:27:10,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24286029] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:10,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2024-11-09 05:27:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578821246] [2024-11-09 05:27:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:10,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:27:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:27:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:27:10,855 INFO L87 Difference]: Start difference. First operand 5064 states and 8064 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-09 05:27:13,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:13,383 INFO L93 Difference]: Finished difference Result 10433 states and 16815 transitions. [2024-11-09 05:27:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:27:13,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2024-11-09 05:27:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:13,444 INFO L225 Difference]: With dead ends: 10433 [2024-11-09 05:27:13,444 INFO L226 Difference]: Without dead ends: 6566 [2024-11-09 05:27:13,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:27:13,471 INFO L432 NwaCegarLoop]: 629 mSDtfsCounter, 1068 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:13,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 1621 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-09 05:27:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2024-11-09 05:27:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 5759. [2024-11-09 05:27:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 4069 states have (on average 1.4898009338903908) internal successors, (6062), 4326 states have internal predecessors, (6062), 1296 states have call successors, (1296), 360 states have call predecessors, (1296), 393 states have return successors, (1822), 1172 states have call predecessors, (1822), 1285 states have call successors, (1822) [2024-11-09 05:27:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 9180 transitions. [2024-11-09 05:27:14,112 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 9180 transitions. Word has length 84 [2024-11-09 05:27:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:14,113 INFO L471 AbstractCegarLoop]: Abstraction has 5759 states and 9180 transitions. [2024-11-09 05:27:14,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-09 05:27:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 9180 transitions. [2024-11-09 05:27:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 05:27:14,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:14,117 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:14,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:27:14,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:14,322 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:14,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash 964600038, now seen corresponding path program 1 times [2024-11-09 05:27:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:14,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018324970] [2024-11-09 05:27:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:27:15,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018324970] [2024-11-09 05:27:15,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018324970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125098263] [2024-11-09 05:27:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:15,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:15,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:15,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:27:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:15,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 05:27:15,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:27:15,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:27:16,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125098263] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:16,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:16,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2024-11-09 05:27:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705379321] [2024-11-09 05:27:16,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:16,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:27:16,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:27:16,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:27:16,297 INFO L87 Difference]: Start difference. First operand 5759 states and 9180 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-09 05:27:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:20,509 INFO L93 Difference]: Finished difference Result 16572 states and 29104 transitions. [2024-11-09 05:27:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:27:20,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2024-11-09 05:27:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:20,618 INFO L225 Difference]: With dead ends: 16572 [2024-11-09 05:27:20,618 INFO L226 Difference]: Without dead ends: 12448 [2024-11-09 05:27:20,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 05:27:20,660 INFO L432 NwaCegarLoop]: 559 mSDtfsCounter, 2377 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 1040 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1040 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:20,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2466 Valid, 2823 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1040 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 05:27:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12448 states. [2024-11-09 05:27:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12448 to 11013. [2024-11-09 05:27:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 7907 states have (on average 1.4996838244593398) internal successors, (11858), 8350 states have internal predecessors, (11858), 2330 states have call successors, (2330), 681 states have call predecessors, (2330), 775 states have return successors, (4145), 2141 states have call predecessors, (4145), 2313 states have call successors, (4145) [2024-11-09 05:27:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 18333 transitions. [2024-11-09 05:27:21,921 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 18333 transitions. Word has length 87 [2024-11-09 05:27:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:21,922 INFO L471 AbstractCegarLoop]: Abstraction has 11013 states and 18333 transitions. [2024-11-09 05:27:21,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-09 05:27:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 18333 transitions. [2024-11-09 05:27:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 05:27:21,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:21,930 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:21,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:27:22,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:22,134 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:22,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:22,135 INFO L85 PathProgramCache]: Analyzing trace with hash 674072236, now seen corresponding path program 1 times [2024-11-09 05:27:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:22,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264173423] [2024-11-09 05:27:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:22,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 05:27:22,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264173423] [2024-11-09 05:27:22,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264173423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080474611] [2024-11-09 05:27:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:22,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:22,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:22,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:27:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:23,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:27:23,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:27:23,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:27:23,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080474611] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:23,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:23,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2024-11-09 05:27:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311910329] [2024-11-09 05:27:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:23,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:27:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:27:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:27:23,834 INFO L87 Difference]: Start difference. First operand 11013 states and 18333 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-09 05:27:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:26,311 INFO L93 Difference]: Finished difference Result 21891 states and 37187 transitions. [2024-11-09 05:27:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:27:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2024-11-09 05:27:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:26,411 INFO L225 Difference]: With dead ends: 21891 [2024-11-09 05:27:26,411 INFO L226 Difference]: Without dead ends: 12513 [2024-11-09 05:27:26,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:27:26,469 INFO L432 NwaCegarLoop]: 616 mSDtfsCounter, 1463 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:26,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1554 Valid, 1612 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:27:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12513 states. [2024-11-09 05:27:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12513 to 11013. [2024-11-09 05:27:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 7907 states have (on average 1.4996838244593398) internal successors, (11858), 8350 states have internal predecessors, (11858), 2330 states have call successors, (2330), 681 states have call predecessors, (2330), 775 states have return successors, (4133), 2141 states have call predecessors, (4133), 2313 states have call successors, (4133) [2024-11-09 05:27:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 18321 transitions. [2024-11-09 05:27:27,519 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 18321 transitions. Word has length 91 [2024-11-09 05:27:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:27,520 INFO L471 AbstractCegarLoop]: Abstraction has 11013 states and 18321 transitions. [2024-11-09 05:27:27,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-09 05:27:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 18321 transitions. [2024-11-09 05:27:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 05:27:27,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:27,529 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:27,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:27:27,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:27:27,729 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:27,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1829540886, now seen corresponding path program 1 times [2024-11-09 05:27:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642061299] [2024-11-09 05:27:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:27:28,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642061299] [2024-11-09 05:27:28,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642061299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285554704] [2024-11-09 05:27:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:28,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:28,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:27:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:28,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:27:28,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:27:28,845 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:28,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285554704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:28,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:28,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-09 05:27:28,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946337996] [2024-11-09 05:27:28,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:28,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:27:28,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:27:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:27:28,848 INFO L87 Difference]: Start difference. First operand 11013 states and 18321 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-09 05:27:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:29,779 INFO L93 Difference]: Finished difference Result 21099 states and 36266 transitions. [2024-11-09 05:27:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:27:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2024-11-09 05:27:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:29,883 INFO L225 Difference]: With dead ends: 21099 [2024-11-09 05:27:29,883 INFO L226 Difference]: Without dead ends: 11301 [2024-11-09 05:27:29,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:27:29,958 INFO L432 NwaCegarLoop]: 570 mSDtfsCounter, 0 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:29,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2257 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11301 states. [2024-11-09 05:27:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11301 to 11235. [2024-11-09 05:27:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11235 states, 8057 states have (on average 1.4903810351247362) internal successors, (12008), 8533 states have internal predecessors, (12008), 2330 states have call successors, (2330), 681 states have call predecessors, (2330), 847 states have return successors, (4615), 2180 states have call predecessors, (4615), 2313 states have call successors, (4615) [2024-11-09 05:27:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11235 states to 11235 states and 18953 transitions. [2024-11-09 05:27:31,437 INFO L78 Accepts]: Start accepts. Automaton has 11235 states and 18953 transitions. Word has length 111 [2024-11-09 05:27:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:31,438 INFO L471 AbstractCegarLoop]: Abstraction has 11235 states and 18953 transitions. [2024-11-09 05:27:31,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-09 05:27:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11235 states and 18953 transitions. [2024-11-09 05:27:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-09 05:27:31,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:31,449 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:31,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:27:31,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:31,650 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:31,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1878227613, now seen corresponding path program 1 times [2024-11-09 05:27:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:31,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723691722] [2024-11-09 05:27:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:27:32,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723691722] [2024-11-09 05:27:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723691722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285765066] [2024-11-09 05:27:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:32,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:32,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:32,300 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:32,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:27:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:32,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:27:32,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:27:32,823 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:32,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285765066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:32,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:32,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 05:27:32,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249673095] [2024-11-09 05:27:32,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:32,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:27:32,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:27:32,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:27:32,825 INFO L87 Difference]: Start difference. First operand 11235 states and 18953 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:27:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:33,618 INFO L93 Difference]: Finished difference Result 23381 states and 40966 transitions. [2024-11-09 05:27:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:27:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2024-11-09 05:27:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:33,715 INFO L225 Difference]: With dead ends: 23381 [2024-11-09 05:27:33,715 INFO L226 Difference]: Without dead ends: 11018 [2024-11-09 05:27:33,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:27:33,799 INFO L432 NwaCegarLoop]: 603 mSDtfsCounter, 241 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:33,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1579 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:27:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11018 states. [2024-11-09 05:27:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11018 to 10921. [2024-11-09 05:27:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10921 states, 7781 states have (on average 1.4568821488240586) internal successors, (11336), 8283 states have internal predecessors, (11336), 2272 states have call successors, (2272), 677 states have call predecessors, (2272), 867 states have return successors, (4463), 2120 states have call predecessors, (4463), 2255 states have call successors, (4463) [2024-11-09 05:27:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 18071 transitions. [2024-11-09 05:27:34,771 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 18071 transitions. Word has length 122 [2024-11-09 05:27:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:34,771 INFO L471 AbstractCegarLoop]: Abstraction has 10921 states and 18071 transitions. [2024-11-09 05:27:34,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:27:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 18071 transitions. [2024-11-09 05:27:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-09 05:27:34,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:34,782 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:34,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:27:34,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:34,983 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:34,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash 604476685, now seen corresponding path program 1 times [2024-11-09 05:27:34,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:34,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843236466] [2024-11-09 05:27:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:27:35,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:35,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843236466] [2024-11-09 05:27:35,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843236466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:35,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146052852] [2024-11-09 05:27:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:35,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:35,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:35,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:35,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:27:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:35,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:27:35,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:27:36,044 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:36,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146052852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:36,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:36,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-09 05:27:36,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823145387] [2024-11-09 05:27:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:36,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:27:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:27:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:27:36,046 INFO L87 Difference]: Start difference. First operand 10921 states and 18071 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:27:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:37,090 INFO L93 Difference]: Finished difference Result 23203 states and 40413 transitions. [2024-11-09 05:27:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:27:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2024-11-09 05:27:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:37,174 INFO L225 Difference]: With dead ends: 23203 [2024-11-09 05:27:37,174 INFO L226 Difference]: Without dead ends: 11126 [2024-11-09 05:27:37,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:27:37,250 INFO L432 NwaCegarLoop]: 583 mSDtfsCounter, 224 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:37,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1554 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:27:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11126 states. [2024-11-09 05:27:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11126 to 10940. [2024-11-09 05:27:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10940 states, 7791 states have (on average 1.4195867026055706) internal successors, (11060), 8302 states have internal predecessors, (11060), 2272 states have call successors, (2272), 677 states have call predecessors, (2272), 876 states have return successors, (4511), 2120 states have call predecessors, (4511), 2255 states have call successors, (4511) [2024-11-09 05:27:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10940 states to 10940 states and 17843 transitions. [2024-11-09 05:27:38,194 INFO L78 Accepts]: Start accepts. Automaton has 10940 states and 17843 transitions. Word has length 126 [2024-11-09 05:27:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:38,195 INFO L471 AbstractCegarLoop]: Abstraction has 10940 states and 17843 transitions. [2024-11-09 05:27:38,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:27:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10940 states and 17843 transitions. [2024-11-09 05:27:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 05:27:38,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:38,208 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:38,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:27:38,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:38,409 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:38,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:38,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1050684023, now seen corresponding path program 1 times [2024-11-09 05:27:38,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:38,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589603313] [2024-11-09 05:27:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 05:27:38,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:38,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589603313] [2024-11-09 05:27:38,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589603313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70328508] [2024-11-09 05:27:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:38,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:38,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:38,940 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:38,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:27:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:39,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 2261 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:27:39,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:27:39,687 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:39,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70328508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:39,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:39,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-09 05:27:39,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417918182] [2024-11-09 05:27:39,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:39,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:27:39,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:39,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:27:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:27:39,690 INFO L87 Difference]: Start difference. First operand 10940 states and 17843 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-09 05:27:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:43,317 INFO L93 Difference]: Finished difference Result 23776 states and 39734 transitions. [2024-11-09 05:27:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:27:43,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 129 [2024-11-09 05:27:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:43,423 INFO L225 Difference]: With dead ends: 23776 [2024-11-09 05:27:43,423 INFO L226 Difference]: Without dead ends: 12806 [2024-11-09 05:27:43,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:27:43,505 INFO L432 NwaCegarLoop]: 361 mSDtfsCounter, 1031 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:43,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 1536 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 2964 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-09 05:27:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12806 states. [2024-11-09 05:27:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12806 to 10979. [2024-11-09 05:27:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 7812 states have (on average 1.4198668714797746) internal successors, (11092), 8341 states have internal predecessors, (11092), 2290 states have call successors, (2290), 677 states have call predecessors, (2290), 876 states have return successors, (4637), 2120 states have call predecessors, (4637), 2273 states have call successors, (4637) [2024-11-09 05:27:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 18019 transitions. [2024-11-09 05:27:44,591 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 18019 transitions. Word has length 129 [2024-11-09 05:27:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:44,591 INFO L471 AbstractCegarLoop]: Abstraction has 10979 states and 18019 transitions. [2024-11-09 05:27:44,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-09 05:27:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 18019 transitions. [2024-11-09 05:27:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-09 05:27:44,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:44,605 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:44,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:27:44,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:27:44,805 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:44,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1066585101, now seen corresponding path program 1 times [2024-11-09 05:27:44,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637166199] [2024-11-09 05:27:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:44,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 05:27:45,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637166199] [2024-11-09 05:27:45,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637166199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721768964] [2024-11-09 05:27:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:45,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:45,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:45,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:27:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:46,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:27:46,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:27:46,181 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721768964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:46,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:46,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-09 05:27:46,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142085368] [2024-11-09 05:27:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:46,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:27:46,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:27:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:27:46,183 INFO L87 Difference]: Start difference. First operand 10979 states and 18019 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2024-11-09 05:27:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:47,257 INFO L93 Difference]: Finished difference Result 25826 states and 44132 transitions. [2024-11-09 05:27:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:27:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 136 [2024-11-09 05:27:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:47,364 INFO L225 Difference]: With dead ends: 25826 [2024-11-09 05:27:47,365 INFO L226 Difference]: Without dead ends: 14859 [2024-11-09 05:27:47,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:27:47,443 INFO L432 NwaCegarLoop]: 726 mSDtfsCounter, 459 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:47,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1263 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14859 states. [2024-11-09 05:27:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14859 to 14543. [2024-11-09 05:27:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14543 states, 10366 states have (on average 1.419448196025468) internal successors, (14714), 11089 states have internal predecessors, (14714), 3017 states have call successors, (3017), 873 states have call predecessors, (3017), 1159 states have return successors, (6272), 2800 states have call predecessors, (6272), 3000 states have call successors, (6272) [2024-11-09 05:27:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14543 states to 14543 states and 24003 transitions. [2024-11-09 05:27:48,494 INFO L78 Accepts]: Start accepts. Automaton has 14543 states and 24003 transitions. Word has length 136 [2024-11-09 05:27:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:48,495 INFO L471 AbstractCegarLoop]: Abstraction has 14543 states and 24003 transitions. [2024-11-09 05:27:48,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2024-11-09 05:27:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 14543 states and 24003 transitions. [2024-11-09 05:27:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-09 05:27:48,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:48,510 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:48,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:27:48,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:27:48,711 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:48,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1451068326, now seen corresponding path program 1 times [2024-11-09 05:27:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51192135] [2024-11-09 05:27:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 05:27:49,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:49,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51192135] [2024-11-09 05:27:49,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51192135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:49,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508951399] [2024-11-09 05:27:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:49,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:49,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:49,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:27:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:49,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 2297 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:27:49,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:27:50,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-09 05:27:50,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508951399] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:50,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:50,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 19 [2024-11-09 05:27:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676978256] [2024-11-09 05:27:50,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:50,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:27:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:27:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:27:50,610 INFO L87 Difference]: Start difference. First operand 14543 states and 24003 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-09 05:27:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:55,304 INFO L93 Difference]: Finished difference Result 37607 states and 67908 transitions. [2024-11-09 05:27:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:27:55,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 142 [2024-11-09 05:27:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:55,453 INFO L225 Difference]: With dead ends: 37607 [2024-11-09 05:27:55,453 INFO L226 Difference]: Without dead ends: 25282 [2024-11-09 05:27:55,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:27:55,607 INFO L432 NwaCegarLoop]: 795 mSDtfsCounter, 1810 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:55,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1886 Valid, 2070 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 05:27:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25282 states. [2024-11-09 05:27:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25282 to 22432. [2024-11-09 05:27:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22432 states, 15855 states have (on average 1.4225165562913906) internal successors, (22554), 16968 states have internal predecessors, (22554), 4778 states have call successors, (4778), 1445 states have call predecessors, (4778), 1798 states have return successors, (9829), 4398 states have call predecessors, (9829), 4752 states have call successors, (9829) [2024-11-09 05:27:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22432 states to 22432 states and 37161 transitions. [2024-11-09 05:27:57,885 INFO L78 Accepts]: Start accepts. Automaton has 22432 states and 37161 transitions. Word has length 142 [2024-11-09 05:27:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:57,886 INFO L471 AbstractCegarLoop]: Abstraction has 22432 states and 37161 transitions. [2024-11-09 05:27:57,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-09 05:27:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 22432 states and 37161 transitions. [2024-11-09 05:27:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-09 05:27:57,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:57,903 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:57,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 05:27:58,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 05:27:58,104 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:58,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash 507487381, now seen corresponding path program 1 times [2024-11-09 05:27:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444980804] [2024-11-09 05:27:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 05:27:58,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:58,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444980804] [2024-11-09 05:27:58,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444980804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:58,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462907430] [2024-11-09 05:27:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:58,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:58,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:58,917 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:58,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:27:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:59,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:27:59,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:27:59,472 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:59,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462907430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:59,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:27:59,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-09 05:27:59,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885443956] [2024-11-09 05:27:59,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:59,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:27:59,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:59,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:27:59,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:27:59,474 INFO L87 Difference]: Start difference. First operand 22432 states and 37161 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:01,144 INFO L93 Difference]: Finished difference Result 42949 states and 72856 transitions. [2024-11-09 05:28:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:01,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2024-11-09 05:28:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:01,455 INFO L225 Difference]: With dead ends: 42949 [2024-11-09 05:28:01,456 INFO L226 Difference]: Without dead ends: 22729 [2024-11-09 05:28:01,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:28:01,587 INFO L432 NwaCegarLoop]: 558 mSDtfsCounter, 17 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:01,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1084 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22729 states. [2024-11-09 05:28:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22729 to 22705. [2024-11-09 05:28:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22705 states, 16093 states have (on average 1.4182563847635619) internal successors, (22824), 17203 states have internal predecessors, (22824), 4814 states have call successors, (4814), 1442 states have call predecessors, (4814), 1797 states have return successors, (9765), 4439 states have call predecessors, (9765), 4788 states have call successors, (9765) [2024-11-09 05:28:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 37403 transitions. [2024-11-09 05:28:03,791 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 37403 transitions. Word has length 142 [2024-11-09 05:28:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:03,791 INFO L471 AbstractCegarLoop]: Abstraction has 22705 states and 37403 transitions. [2024-11-09 05:28:03,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2024-11-09 05:28:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 37403 transitions. [2024-11-09 05:28:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-09 05:28:03,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:03,800 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:03,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 05:28:04,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:28:04,001 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:04,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash -331776626, now seen corresponding path program 1 times [2024-11-09 05:28:04,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:04,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884514083] [2024-11-09 05:28:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:04,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 05:28:04,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:04,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884514083] [2024-11-09 05:28:04,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884514083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:04,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540394577] [2024-11-09 05:28:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:04,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:04,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:04,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:28:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:05,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 2298 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:28:05,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:05,278 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:05,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540394577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:05,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:05,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2024-11-09 05:28:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460095874] [2024-11-09 05:28:05,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:05,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:28:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:28:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:28:05,280 INFO L87 Difference]: Start difference. First operand 22705 states and 37403 transitions. Second operand has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-09 05:28:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:08,833 INFO L93 Difference]: Finished difference Result 57254 states and 95697 transitions. [2024-11-09 05:28:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:28:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 143 [2024-11-09 05:28:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:09,147 INFO L225 Difference]: With dead ends: 57254 [2024-11-09 05:28:09,148 INFO L226 Difference]: Without dead ends: 36761 [2024-11-09 05:28:09,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:28:09,348 INFO L432 NwaCegarLoop]: 599 mSDtfsCounter, 525 mSDsluCounter, 3278 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:09,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 3877 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:28:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36761 states. [2024-11-09 05:28:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36761 to 35162. [2024-11-09 05:28:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35162 states, 24947 states have (on average 1.4253016394756886) internal successors, (35557), 26679 states have internal predecessors, (35557), 7440 states have call successors, (7440), 2267 states have call predecessors, (7440), 2774 states have return successors, (15494), 6831 states have call predecessors, (15494), 7396 states have call successors, (15494) [2024-11-09 05:28:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35162 states to 35162 states and 58491 transitions. [2024-11-09 05:28:12,541 INFO L78 Accepts]: Start accepts. Automaton has 35162 states and 58491 transitions. Word has length 143 [2024-11-09 05:28:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:12,542 INFO L471 AbstractCegarLoop]: Abstraction has 35162 states and 58491 transitions. [2024-11-09 05:28:12,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-09 05:28:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 35162 states and 58491 transitions. [2024-11-09 05:28:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-09 05:28:12,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:12,570 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:12,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:12,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:28:12,771 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:12,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1348244119, now seen corresponding path program 1 times [2024-11-09 05:28:12,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:12,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240637938] [2024-11-09 05:28:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 05:28:13,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:13,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240637938] [2024-11-09 05:28:13,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240637938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:13,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940307011] [2024-11-09 05:28:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:13,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:13,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:13,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2819b1d0-cf32-4210-9416-935fe1b69bde/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:28:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:14,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:28:14,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 05:28:14,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 05:28:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940307011] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:14,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:28:14,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 20 [2024-11-09 05:28:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789582518] [2024-11-09 05:28:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:14,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:28:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:28:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:28:14,704 INFO L87 Difference]: Start difference. First operand 35162 states and 58491 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2024-11-09 05:28:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:22,042 INFO L93 Difference]: Finished difference Result 83237 states and 147911 transitions. [2024-11-09 05:28:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:28:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 147 [2024-11-09 05:28:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:22,341 INFO L225 Difference]: With dead ends: 83237 [2024-11-09 05:28:22,341 INFO L226 Difference]: Without dead ends: 50349 [2024-11-09 05:28:22,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:28:22,835 INFO L432 NwaCegarLoop]: 664 mSDtfsCounter, 1024 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:22,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 1839 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 05:28:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50349 states.