./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/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_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/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_4faa66e7-ace9-4be1-a167-539a6cef4f0c/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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:28,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:28,502 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:29:28,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:28,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:28,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:28,549 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:28,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:28,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:28,553 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:28,553 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:28,554 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:28,554 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:28,558 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:28,558 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:28,559 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:28,559 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:28,559 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:28,560 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:28,560 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:28,560 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:28,563 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:28,564 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:28,564 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:29:28,564 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:28,565 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:28,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:28,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:28,566 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:29:28,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:28,566 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:29:28,568 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:28,568 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:28,568 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:29:28,569 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:28,569 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:28,569 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:28,569 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:28,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:28,570 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:28,570 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:28,571 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:29:28,571 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:28,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:28,572 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:28,572 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:28,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:28,573 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_4faa66e7-ace9-4be1-a167-539a6cef4f0c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2024-11-09 04:29:28,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:28,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:28,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:28,876 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:28,877 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:28,878 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c Unable to find full path for "g++" [2024-11-09 04:29:30,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:31,209 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:31,211 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2024-11-09 04:29:31,239 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/data/7b22bb9ab/510592e20ec34bea9ec0692da2645ec8/FLAG257aa8168 [2024-11-09 04:29:31,446 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/data/7b22bb9ab/510592e20ec34bea9ec0692da2645ec8 [2024-11-09 04:29:31,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:31,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:31,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:31,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:31,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:31,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7457b3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31, skipping insertion in model container [2024-11-09 04:29:31,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,538 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:29:31,754 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_4faa66e7-ace9-4be1-a167-539a6cef4f0c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2024-11-09 04:29:32,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:32,275 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:29:32,285 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2024-11-09 04:29:32,286 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [57] [2024-11-09 04:29:32,287 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [423] [2024-11-09 04:29:32,287 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [523] [2024-11-09 04:29:32,287 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [643] [2024-11-09 04:29:32,287 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [832] [2024-11-09 04:29:32,288 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1185] [2024-11-09 04:29:32,288 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1200] [2024-11-09 04:29:32,288 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2726] [2024-11-09 04:29:32,288 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3387] [2024-11-09 04:29:32,292 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_4faa66e7-ace9-4be1-a167-539a6cef4f0c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2024-11-09 04:29:32,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:32,511 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:29:32,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32 WrapperNode [2024-11-09 04:29:32,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:32,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:32,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:29:32,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:29:32,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,617 INFO L138 Inliner]: procedures = 91, calls = 344, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1099 [2024-11-09 04:29:32,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:32,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:29:32,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:29:32,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:29:32,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,649 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,649 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,723 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:29:32,746 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:29:32,746 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:29:32,747 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:29:32,748 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (1/1) ... [2024-11-09 04:29:32,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:32,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:29:32,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:29:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:29:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-09 04:29:32,822 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-09 04:29:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-09 04:29:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-09 04:29:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-09 04:29:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-09 04:29:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-09 04:29:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-09 04:29:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-09 04:29:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-09 04:29:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-09 04:29:32,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-09 04:29:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-09 04:29:32,826 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-09 04:29:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-09 04:29:32,828 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-09 04:29:32,828 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-09 04:29:32,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-09 04:29:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-09 04:29:32,829 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-09 04:29:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-09 04:29:32,829 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-09 04:29:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-09 04:29:32,829 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-09 04:29:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-09 04:29:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-09 04:29:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-09 04:29:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-09 04:29:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-09 04:29:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-09 04:29:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-09 04:29:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-09 04:29:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-09 04:29:32,831 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-09 04:29:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-09 04:29:32,831 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-09 04:29:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-09 04:29:32,831 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-09 04:29:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-09 04:29:32,833 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-09 04:29:32,834 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-09 04:29:32,834 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-09 04:29:32,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:29:32,834 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-09 04:29:32,834 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-09 04:29:32,835 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-09 04:29:32,835 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-09 04:29:32,835 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-09 04:29:32,836 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-09 04:29:32,836 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-09 04:29:32,837 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-09 04:29:32,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:29:32,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:29:32,837 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-09 04:29:32,838 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-09 04:29:33,022 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:29:33,024 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:29:34,870 INFO L? ?]: Removed 451 outVars from TransFormulas that were not future-live. [2024-11-09 04:29:34,870 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:29:35,866 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:29:35,870 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 04:29:35,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:35 BoogieIcfgContainer [2024-11-09 04:29:35,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:29:35,875 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:29:35,875 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:29:35,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:29:35,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:31" (1/3) ... [2024-11-09 04:29:35,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a60bb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:35, skipping insertion in model container [2024-11-09 04:29:35,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:32" (2/3) ... [2024-11-09 04:29:35,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a60bb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:35, skipping insertion in model container [2024-11-09 04:29:35,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:35" (3/3) ... [2024-11-09 04:29:35,885 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product11.cil.c [2024-11-09 04:29:35,905 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:29:35,905 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:29:36,007 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:29:36,015 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;@43cd1d67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:29:36,015 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:29:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2024-11-09 04:29:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-09 04:29:36,053 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:36,055 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:36,055 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:36,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1785922438, now seen corresponding path program 1 times [2024-11-09 04:29:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:36,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482225928] [2024-11-09 04:29:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:36,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:29:37,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482225928] [2024-11-09 04:29:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482225928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623312305] [2024-11-09 04:29:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:37,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:37,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:37,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:37,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:29:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:29:37,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:29:37,813 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:37,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623312305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:37,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:37,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:29:37,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876023391] [2024-11-09 04:29:37,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:37,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:37,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:37,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:37,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:29:37,861 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 04:29:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:38,285 INFO L93 Difference]: Finished difference Result 1135 states and 1815 transitions. [2024-11-09 04:29:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2024-11-09 04:29:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:38,316 INFO L225 Difference]: With dead ends: 1135 [2024-11-09 04:29:38,317 INFO L226 Difference]: Without dead ends: 733 [2024-11-09 04:29:38,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 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 04:29:38,332 INFO L432 NwaCegarLoop]: 1019 mSDtfsCounter, 566 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:38,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1525 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:29:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2024-11-09 04:29:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 721. [2024-11-09 04:29:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 487 states have (on average 1.566735112936345) internal successors, (763), 518 states have internal predecessors, (763), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (189), 181 states have call predecessors, (189), 184 states have call successors, (189) [2024-11-09 04:29:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1139 transitions. [2024-11-09 04:29:38,487 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1139 transitions. Word has length 86 [2024-11-09 04:29:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:38,488 INFO L471 AbstractCegarLoop]: Abstraction has 721 states and 1139 transitions. [2024-11-09 04:29:38,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 04:29:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1139 transitions. [2024-11-09 04:29:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 04:29:38,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:38,496 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:38,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:29:38,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-09 04:29:38,700 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:38,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1941840310, now seen corresponding path program 1 times [2024-11-09 04:29:38,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268123229] [2024-11-09 04:29:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:39,290 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 04:29:39,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:39,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268123229] [2024-11-09 04:29:39,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268123229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:39,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:39,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:29:39,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172137752] [2024-11-09 04:29:39,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:39,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:29:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:29:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:39,298 INFO L87 Difference]: Start difference. First operand 721 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:29:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:40,307 INFO L93 Difference]: Finished difference Result 2096 states and 3360 transitions. [2024-11-09 04:29:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:29:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2024-11-09 04:29:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:40,322 INFO L225 Difference]: With dead ends: 2096 [2024-11-09 04:29:40,323 INFO L226 Difference]: Without dead ends: 1387 [2024-11-09 04:29:40,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:29:40,330 INFO L432 NwaCegarLoop]: 636 mSDtfsCounter, 579 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 2905 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:40,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 2905 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:29:40,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2024-11-09 04:29:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1343. [2024-11-09 04:29:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 926 states have (on average 1.5755939524838012) internal successors, (1459), 985 states have internal predecessors, (1459), 333 states have call successors, (333), 84 states have call predecessors, (333), 83 states have return successors, (360), 313 states have call predecessors, (360), 329 states have call successors, (360) [2024-11-09 04:29:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2152 transitions. [2024-11-09 04:29:40,450 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2152 transitions. Word has length 87 [2024-11-09 04:29:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:40,452 INFO L471 AbstractCegarLoop]: Abstraction has 1343 states and 2152 transitions. [2024-11-09 04:29:40,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:29:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2152 transitions. [2024-11-09 04:29:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 04:29:40,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:40,460 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:40,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:29:40,461 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:40,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:40,462 INFO L85 PathProgramCache]: Analyzing trace with hash -925872896, now seen corresponding path program 1 times [2024-11-09 04:29:40,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:40,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990239832] [2024-11-09 04:29:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:40,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:29:40,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:40,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990239832] [2024-11-09 04:29:40,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990239832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281866025] [2024-11-09 04:29:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:40,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:40,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:40,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:40,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:29:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:41,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:29:41,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:29:41,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:41,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281866025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:41,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:41,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:29:41,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437941235] [2024-11-09 04:29:41,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:41,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:41,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:29:41,403 INFO L87 Difference]: Start difference. First operand 1343 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 04:29:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:41,753 INFO L93 Difference]: Finished difference Result 3306 states and 5369 transitions. [2024-11-09 04:29:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2024-11-09 04:29:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:41,770 INFO L225 Difference]: With dead ends: 3306 [2024-11-09 04:29:41,770 INFO L226 Difference]: Without dead ends: 1975 [2024-11-09 04:29:41,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 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 04:29:41,782 INFO L432 NwaCegarLoop]: 1059 mSDtfsCounter, 557 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:41,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1560 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2024-11-09 04:29:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1930. [2024-11-09 04:29:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1337 states have (on average 1.5789080029917726) internal successors, (2111), 1425 states have internal predecessors, (2111), 473 states have call successors, (473), 118 states have call predecessors, (473), 119 states have return successors, (520), 446 states have call predecessors, (520), 469 states have call successors, (520) [2024-11-09 04:29:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3104 transitions. [2024-11-09 04:29:42,003 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3104 transitions. Word has length 87 [2024-11-09 04:29:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:42,004 INFO L471 AbstractCegarLoop]: Abstraction has 1930 states and 3104 transitions. [2024-11-09 04:29:42,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-09 04:29:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3104 transitions. [2024-11-09 04:29:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 04:29:42,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:42,012 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:42,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:29:42,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:42,216 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:42,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1171537508, now seen corresponding path program 1 times [2024-11-09 04:29:42,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:42,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058654744] [2024-11-09 04:29:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:42,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:29:42,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058654744] [2024-11-09 04:29:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058654744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652215008] [2024-11-09 04:29:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:42,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:42,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:42,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:42,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:29:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:43,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:29:43,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:29:43,268 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:43,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652215008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:43,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:43,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:29:43,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562942171] [2024-11-09 04:29:43,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:43,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:43,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:43,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:29:43,271 INFO L87 Difference]: Start difference. First operand 1930 states and 3104 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:29:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:43,892 INFO L93 Difference]: Finished difference Result 5530 states and 8999 transitions. [2024-11-09 04:29:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2024-11-09 04:29:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:43,926 INFO L225 Difference]: With dead ends: 5530 [2024-11-09 04:29:43,926 INFO L226 Difference]: Without dead ends: 3613 [2024-11-09 04:29:43,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 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 04:29:43,946 INFO L432 NwaCegarLoop]: 627 mSDtfsCounter, 493 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:43,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1140 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:29:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2024-11-09 04:29:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3585. [2024-11-09 04:29:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 2463 states have (on average 1.5274056029232643) internal successors, (3762), 2637 states have internal predecessors, (3762), 894 states have call successors, (894), 230 states have call predecessors, (894), 227 states have return successors, (1025), 831 states have call predecessors, (1025), 888 states have call successors, (1025) [2024-11-09 04:29:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5681 transitions. [2024-11-09 04:29:44,247 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5681 transitions. Word has length 88 [2024-11-09 04:29:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:44,248 INFO L471 AbstractCegarLoop]: Abstraction has 3585 states and 5681 transitions. [2024-11-09 04:29:44,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:29:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5681 transitions. [2024-11-09 04:29:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 04:29:44,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:44,257 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] [2024-11-09 04:29:44,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:29:44,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:44,458 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:44,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:44,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1537155767, now seen corresponding path program 1 times [2024-11-09 04:29:44,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:44,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244100510] [2024-11-09 04:29:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:44,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 04:29:44,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244100510] [2024-11-09 04:29:44,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244100510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448672405] [2024-11-09 04:29:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:44,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:44,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:44,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:44,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:29:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:45,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:29:45,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:29:45,435 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:45,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448672405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:45,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:45,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-09 04:29:45,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630127820] [2024-11-09 04:29:45,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:45,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:29:45,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:29:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:29:45,440 INFO L87 Difference]: Start difference. First operand 3585 states and 5681 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-09 04:29:46,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:46,695 INFO L93 Difference]: Finished difference Result 6798 states and 10811 transitions. [2024-11-09 04:29:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:29:46,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2024-11-09 04:29:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:46,724 INFO L225 Difference]: With dead ends: 6798 [2024-11-09 04:29:46,724 INFO L226 Difference]: Without dead ends: 3225 [2024-11-09 04:29:46,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:29:46,756 INFO L432 NwaCegarLoop]: 604 mSDtfsCounter, 506 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:46,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 2716 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 04:29:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2024-11-09 04:29:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 3204. [2024-11-09 04:29:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 2214 states have (on average 1.5176151761517616) internal successors, (3360), 2363 states have internal predecessors, (3360), 784 states have call successors, (784), 210 states have call predecessors, (784), 205 states have return successors, (887), 726 states have call predecessors, (887), 778 states have call successors, (887) [2024-11-09 04:29:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 5031 transitions. [2024-11-09 04:29:47,077 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 5031 transitions. Word has length 89 [2024-11-09 04:29:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:47,078 INFO L471 AbstractCegarLoop]: Abstraction has 3204 states and 5031 transitions. [2024-11-09 04:29:47,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-09 04:29:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 5031 transitions. [2024-11-09 04:29:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 04:29:47,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:47,082 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:47,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:29:47,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:47,283 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:47,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash 767158845, now seen corresponding path program 1 times [2024-11-09 04:29:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:47,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190116502] [2024-11-09 04:29:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:47,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:29:48,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190116502] [2024-11-09 04:29:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190116502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233092005] [2024-11-09 04:29:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:48,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:48,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:48,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:48,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:29:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:48,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:29:48,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:29:48,792 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233092005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:48,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:48,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2024-11-09 04:29:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297031892] [2024-11-09 04:29:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:48,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:29:48,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:29:48,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:29:48,795 INFO L87 Difference]: Start difference. First operand 3204 states and 5031 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-09 04:29:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:50,588 INFO L93 Difference]: Finished difference Result 6747 states and 10587 transitions. [2024-11-09 04:29:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:29:50,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2024-11-09 04:29:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:50,626 INFO L225 Difference]: With dead ends: 6747 [2024-11-09 04:29:50,626 INFO L226 Difference]: Without dead ends: 3555 [2024-11-09 04:29:50,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 04:29:50,650 INFO L432 NwaCegarLoop]: 608 mSDtfsCounter, 1064 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 2052 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:50,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 2052 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 04:29:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2024-11-09 04:29:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3544. [2024-11-09 04:29:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2470 states have (on average 1.497165991902834) internal successors, (3698), 2627 states have internal predecessors, (3698), 844 states have call successors, (844), 238 states have call predecessors, (844), 229 states have return successors, (949), 774 states have call predecessors, (949), 838 states have call successors, (949) [2024-11-09 04:29:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5491 transitions. [2024-11-09 04:29:50,926 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5491 transitions. Word has length 94 [2024-11-09 04:29:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:50,927 INFO L471 AbstractCegarLoop]: Abstraction has 3544 states and 5491 transitions. [2024-11-09 04:29:50,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-09 04:29:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5491 transitions. [2024-11-09 04:29:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 04:29:50,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:50,930 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:50,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:51,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:51,135 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:51,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash -203382566, now seen corresponding path program 1 times [2024-11-09 04:29:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:51,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908483750] [2024-11-09 04:29:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:29:51,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:51,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908483750] [2024-11-09 04:29:51,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908483750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172588737] [2024-11-09 04:29:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:51,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:51,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:51,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:29:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:52,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:29:52,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:29:52,235 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172588737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:52,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:52,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-09 04:29:52,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100076795] [2024-11-09 04:29:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:52,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:29:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:29:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-09 04:29:52,237 INFO L87 Difference]: Start difference. First operand 3544 states and 5491 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 04:29:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:52,741 INFO L93 Difference]: Finished difference Result 6317 states and 9811 transitions. [2024-11-09 04:29:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:29:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2024-11-09 04:29:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:52,780 INFO L225 Difference]: With dead ends: 6317 [2024-11-09 04:29:52,780 INFO L226 Difference]: Without dead ends: 3594 [2024-11-09 04:29:52,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-09 04:29:52,802 INFO L432 NwaCegarLoop]: 588 mSDtfsCounter, 0 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:52,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2934 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2024-11-09 04:29:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 3594. [2024-11-09 04:29:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3594 states, 2510 states have (on average 1.4892430278884463) internal successors, (3738), 2667 states have internal predecessors, (3738), 844 states have call successors, (844), 238 states have call predecessors, (844), 239 states have return successors, (969), 784 states have call predecessors, (969), 838 states have call successors, (969) [2024-11-09 04:29:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 5551 transitions. [2024-11-09 04:29:53,068 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 5551 transitions. Word has length 99 [2024-11-09 04:29:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:53,068 INFO L471 AbstractCegarLoop]: Abstraction has 3594 states and 5551 transitions. [2024-11-09 04:29:53,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 04:29:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 5551 transitions. [2024-11-09 04:29:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 04:29:53,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:53,072 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-09 04:29:53,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:29:53,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:53,273 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:53,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1845707462, now seen corresponding path program 1 times [2024-11-09 04:29:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:53,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038750716] [2024-11-09 04:29:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 04:29:53,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038750716] [2024-11-09 04:29:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038750716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184262480] [2024-11-09 04:29:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:54,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:54,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:54,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:29:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:54,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:29:54,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:29:54,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:29:55,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184262480] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:55,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:29:55,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2024-11-09 04:29:55,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481287586] [2024-11-09 04:29:55,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:55,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:29:55,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:29:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:29:55,048 INFO L87 Difference]: Start difference. First operand 3594 states and 5551 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 04:29:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:58,816 INFO L93 Difference]: Finished difference Result 9452 states and 15097 transitions. [2024-11-09 04:29:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:29:58,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2024-11-09 04:29:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:58,871 INFO L225 Difference]: With dead ends: 9452 [2024-11-09 04:29:58,871 INFO L226 Difference]: Without dead ends: 7045 [2024-11-09 04:29:58,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 04:29:58,887 INFO L432 NwaCegarLoop]: 597 mSDtfsCounter, 2351 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 3117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:58,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2436 Valid, 2857 Invalid, 3117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-09 04:29:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2024-11-09 04:29:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 6928. [2024-11-09 04:29:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6928 states, 4934 states have (on average 1.4971625456019457) internal successors, (7387), 5192 states have internal predecessors, (7387), 1495 states have call successors, (1495), 468 states have call predecessors, (1495), 498 states have return successors, (1988), 1411 states have call predecessors, (1988), 1487 states have call successors, (1988) [2024-11-09 04:29:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6928 states to 6928 states and 10870 transitions. [2024-11-09 04:29:59,513 INFO L78 Accepts]: Start accepts. Automaton has 6928 states and 10870 transitions. Word has length 103 [2024-11-09 04:29:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:59,515 INFO L471 AbstractCegarLoop]: Abstraction has 6928 states and 10870 transitions. [2024-11-09 04:29:59,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 04:29:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6928 states and 10870 transitions. [2024-11-09 04:29:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 04:29:59,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:59,520 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-09 04:29:59,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:29:59,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:59,722 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:59,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:59,722 INFO L85 PathProgramCache]: Analyzing trace with hash -929916971, now seen corresponding path program 1 times [2024-11-09 04:29:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:59,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96993345] [2024-11-09 04:29:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:59,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 04:30:00,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:00,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96993345] [2024-11-09 04:30:00,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96993345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:00,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982332407] [2024-11-09 04:30:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:00,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:00,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:00,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:30:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:00,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:30:00,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:30:01,022 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:01,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982332407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:01,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:01,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-09 04:30:01,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468905202] [2024-11-09 04:30:01,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:01,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:01,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:30:01,025 INFO L87 Difference]: Start difference. First operand 6928 states and 10870 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-09 04:30:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:02,041 INFO L93 Difference]: Finished difference Result 12683 states and 19924 transitions. [2024-11-09 04:30:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:02,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2024-11-09 04:30:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:02,101 INFO L225 Difference]: With dead ends: 12683 [2024-11-09 04:30:02,101 INFO L226 Difference]: Without dead ends: 6950 [2024-11-09 04:30:02,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:30:02,133 INFO L432 NwaCegarLoop]: 650 mSDtfsCounter, 417 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:02,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2344 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:30:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2024-11-09 04:30:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 6928. [2024-11-09 04:30:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6928 states, 4934 states have (on average 1.4971625456019457) internal successors, (7387), 5192 states have internal predecessors, (7387), 1495 states have call successors, (1495), 468 states have call predecessors, (1495), 498 states have return successors, (1980), 1411 states have call predecessors, (1980), 1487 states have call successors, (1980) [2024-11-09 04:30:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6928 states to 6928 states and 10862 transitions. [2024-11-09 04:30:02,726 INFO L78 Accepts]: Start accepts. Automaton has 6928 states and 10862 transitions. Word has length 107 [2024-11-09 04:30:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:02,727 INFO L471 AbstractCegarLoop]: Abstraction has 6928 states and 10862 transitions. [2024-11-09 04:30:02,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-09 04:30:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6928 states and 10862 transitions. [2024-11-09 04:30:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 04:30:02,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:02,732 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:02,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:30:02,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:02,938 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:02,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1875555294, now seen corresponding path program 1 times [2024-11-09 04:30:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:02,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539982376] [2024-11-09 04:30:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:30:03,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:03,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539982376] [2024-11-09 04:30:03,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539982376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:03,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880387175] [2024-11-09 04:30:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:03,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:03,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:03,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:30:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:04,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:30:04,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-09 04:30:04,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-09 04:30:04,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880387175] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:04,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:04,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 27 [2024-11-09 04:30:04,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917111125] [2024-11-09 04:30:04,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:04,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:30:04,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:30:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2024-11-09 04:30:04,935 INFO L87 Difference]: Start difference. First operand 6928 states and 10862 transitions. Second operand has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-09 04:30:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:10,330 INFO L93 Difference]: Finished difference Result 14603 states and 23494 transitions. [2024-11-09 04:30:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 04:30:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 134 [2024-11-09 04:30:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:10,448 INFO L225 Difference]: With dead ends: 14603 [2024-11-09 04:30:10,448 INFO L226 Difference]: Without dead ends: 14600 [2024-11-09 04:30:10,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 04:30:10,458 INFO L432 NwaCegarLoop]: 603 mSDtfsCounter, 3212 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 3263 mSolverCounterSat, 1331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3313 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 4594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1331 IncrementalHoareTripleChecker+Valid, 3263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:10,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3313 Valid, 3381 Invalid, 4594 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1331 Valid, 3263 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-09 04:30:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14600 states. [2024-11-09 04:30:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14600 to 13153. [2024-11-09 04:30:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13153 states, 9536 states have (on average 1.5158347315436242) internal successors, (14455), 9985 states have internal predecessors, (14455), 2661 states have call successors, (2661), 860 states have call predecessors, (2661), 955 states have return successors, (3582), 2559 states have call predecessors, (3582), 2649 states have call successors, (3582) [2024-11-09 04:30:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13153 states to 13153 states and 20698 transitions. [2024-11-09 04:30:11,720 INFO L78 Accepts]: Start accepts. Automaton has 13153 states and 20698 transitions. Word has length 134 [2024-11-09 04:30:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:11,722 INFO L471 AbstractCegarLoop]: Abstraction has 13153 states and 20698 transitions. [2024-11-09 04:30:11,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-09 04:30:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 13153 states and 20698 transitions. [2024-11-09 04:30:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 04:30:11,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:11,736 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:11,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:30:11,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:30:11,941 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:11,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1951192527, now seen corresponding path program 1 times [2024-11-09 04:30:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285907730] [2024-11-09 04:30:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 04:30:12,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:12,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285907730] [2024-11-09 04:30:12,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285907730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:12,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939770956] [2024-11-09 04:30:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:12,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:12,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:12,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:12,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:30:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:12,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:30:12,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 04:30:12,885 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:12,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939770956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:12,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:12,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-09 04:30:12,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556327660] [2024-11-09 04:30:12,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:12,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:30:12,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:30:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-09 04:30:12,887 INFO L87 Difference]: Start difference. First operand 13153 states and 20698 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 5 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2024-11-09 04:30:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:16,884 INFO L93 Difference]: Finished difference Result 28476 states and 45461 transitions. [2024-11-09 04:30:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:30:16,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 5 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 159 [2024-11-09 04:30:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:17,027 INFO L225 Difference]: With dead ends: 28476 [2024-11-09 04:30:17,027 INFO L226 Difference]: Without dead ends: 15093 [2024-11-09 04:30:17,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 155 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 04:30:17,112 INFO L432 NwaCegarLoop]: 413 mSDtfsCounter, 1429 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 3098 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 3098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:17,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 1790 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 3098 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-09 04:30:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15093 states. [2024-11-09 04:30:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15093 to 13143. [2024-11-09 04:30:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13143 states, 9526 states have (on average 1.5161662817551964) internal successors, (14443), 9975 states have internal predecessors, (14443), 2661 states have call successors, (2661), 860 states have call predecessors, (2661), 955 states have return successors, (3582), 2559 states have call predecessors, (3582), 2649 states have call successors, (3582) [2024-11-09 04:30:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13143 states to 13143 states and 20686 transitions. [2024-11-09 04:30:18,511 INFO L78 Accepts]: Start accepts. Automaton has 13143 states and 20686 transitions. Word has length 159 [2024-11-09 04:30:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:18,513 INFO L471 AbstractCegarLoop]: Abstraction has 13143 states and 20686 transitions. [2024-11-09 04:30:18,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 5 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2024-11-09 04:30:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 13143 states and 20686 transitions. [2024-11-09 04:30:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-09 04:30:18,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:18,524 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:18,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:18,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:30:18,725 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:18,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1986444807, now seen corresponding path program 1 times [2024-11-09 04:30:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:18,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395690505] [2024-11-09 04:30:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-09 04:30:19,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395690505] [2024-11-09 04:30:19,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395690505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550998642] [2024-11-09 04:30:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:19,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:19,454 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:19,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:30:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:19,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:30:19,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:30:20,066 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:20,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550998642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:20,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:20,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-09 04:30:20,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158367716] [2024-11-09 04:30:20,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:20,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:30:20,069 INFO L87 Difference]: Start difference. First operand 13143 states and 20686 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2024-11-09 04:30:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:21,423 INFO L93 Difference]: Finished difference Result 30792 states and 49214 transitions. [2024-11-09 04:30:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 166 [2024-11-09 04:30:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:21,566 INFO L225 Difference]: With dead ends: 30792 [2024-11-09 04:30:21,567 INFO L226 Difference]: Without dead ends: 17661 [2024-11-09 04:30:21,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 166 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 04:30:21,648 INFO L432 NwaCegarLoop]: 731 mSDtfsCounter, 485 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:21,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1306 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17661 states. [2024-11-09 04:30:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17661 to 17452. [2024-11-09 04:30:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17452 states, 12667 states have (on average 1.5165390384463566) internal successors, (19210), 13277 states have internal predecessors, (19210), 3517 states have call successors, (3517), 1130 states have call predecessors, (3517), 1267 states have return successors, (4776), 3386 states have call predecessors, (4776), 3505 states have call successors, (4776) [2024-11-09 04:30:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17452 states to 17452 states and 27503 transitions. [2024-11-09 04:30:23,893 INFO L78 Accepts]: Start accepts. Automaton has 17452 states and 27503 transitions. Word has length 166 [2024-11-09 04:30:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:23,893 INFO L471 AbstractCegarLoop]: Abstraction has 17452 states and 27503 transitions. [2024-11-09 04:30:23,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2024-11-09 04:30:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17452 states and 27503 transitions. [2024-11-09 04:30:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-09 04:30:23,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:23,909 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:23,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:30:24,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:30:24,110 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:24,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash -748524919, now seen corresponding path program 1 times [2024-11-09 04:30:24,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:24,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602761366] [2024-11-09 04:30:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 04:30:24,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:24,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602761366] [2024-11-09 04:30:24,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602761366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:24,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251305125] [2024-11-09 04:30:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:24,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:24,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:24,888 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:24,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4faa66e7-ace9-4be1-a167-539a6cef4f0c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:30:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:25,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:30:25,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 04:30:25,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-09 04:30:25,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251305125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:25,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186755618] [2024-11-09 04:30:25,882 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2024-11-09 04:30:25,882 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:25,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:25,892 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:25,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:48,935 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 589 for LOIs [2024-11-09 04:34:24,469 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 7 for LOIs [2024-11-09 04:34:24,471 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 635 for LOIs [2024-11-09 04:36:38,728 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 746 for LOIs [2024-11-09 04:37:53,661 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 598 for LOIs [2024-11-09 04:38:09,555 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 1 for LOIs [2024-11-09 04:38:09,568 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 20 for LOIs [2024-11-09 04:38:09,582 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 593 for LOIs [2024-11-09 04:38:17,248 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 567 for LOIs [2024-11-09 04:38:17,806 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 1 for LOIs [2024-11-09 04:38:17,807 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 23 for LOIs [2024-11-09 04:38:17,821 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 606 for LOIs [2024-11-09 04:38:21,219 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 567 for LOIs [2024-11-09 04:38:31,760 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 571 for LOIs [2024-11-09 04:38:32,501 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 499 for LOIs [2024-11-09 04:38:32,967 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:38:38,291 WARN L286 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 499 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:38:50,731 WARN L286 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 593 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:38:58,232 WARN L286 SmtUtils]: Spent 7.24s on a formula simplification that was a NOOP. DAG size: 593 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:39:04,545 WARN L286 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 567 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:39:15,032 WARN L286 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 499 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:39:20,333 WARN L286 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 501 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:39:26,787 WARN L286 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 569 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:39:34,438 WARN L286 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 569 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:39:42,088 WARN L286 SmtUtils]: Spent 7.30s on a formula simplification that was a NOOP. DAG size: 571 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:39:49,435 WARN L286 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 571 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:40:08,666 WARN L286 SmtUtils]: Spent 9.85s on a formula simplification. DAG size of input: 589 DAG size of output: 549 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:40:20,256 WARN L286 SmtUtils]: Spent 10.39s on a formula simplification. DAG size of input: 593 DAG size of output: 553 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:40:32,222 WARN L286 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 595 DAG size of output: 555 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:40:44,087 WARN L286 SmtUtils]: Spent 10.61s on a formula simplification. DAG size of input: 600 DAG size of output: 560 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:41:00,702 WARN L286 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 605 DAG size of output: 562 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:41:12,641 WARN L286 SmtUtils]: Spent 10.62s on a formula simplification. DAG size of input: 608 DAG size of output: 565 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:41:24,585 WARN L286 SmtUtils]: Spent 10.66s on a formula simplification. DAG size of input: 608 DAG size of output: 565 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:41:36,164 WARN L286 SmtUtils]: Spent 10.07s on a formula simplification. DAG size of input: 607 DAG size of output: 564 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:41:48,945 WARN L286 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 608 DAG size of output: 566 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:42:00,673 WARN L286 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 611 DAG size of output: 569 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:42:11,765 WARN L286 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 605 DAG size of output: 565 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:42:23,986 WARN L286 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 605 DAG size of output: 565 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:42:35,578 WARN L286 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 607 DAG size of output: 567 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:42:47,000 WARN L286 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 610 DAG size of output: 570 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:43:12,101 WARN L286 SmtUtils]: Spent 23.97s on a formula simplification. DAG size of input: 601 DAG size of output: 588 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:43:37,844 WARN L286 SmtUtils]: Spent 24.13s on a formula simplification. DAG size of input: 598 DAG size of output: 585 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)