./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E --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 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:44:39,899 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:44:40,022 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:44:40,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:44:40,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:44:40,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:44:40,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:44:40,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:44:40,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:44:40,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:44:40,058 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:44:40,058 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:44:40,058 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:44:40,059 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:44:40,059 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:44:40,059 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:44:40,059 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:44:40,059 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:44:40,060 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:44:40,060 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:44:40,060 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:44:40,060 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:44:40,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:44:40,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:44:40,062 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:44:40,062 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:44:40,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:44:40,062 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:44:40,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:44:40,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:44:40,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:44:40,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:44:40,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:44:40,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:44:40,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:44:40,064 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:44:40,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:44:40,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:44:40,064 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:44:40,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:44:40,065 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E 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 -> 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 [2024-11-14 02:44:40,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:44:40,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:44:40,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:44:40,408 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:44:40,408 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:44:40,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c Unable to find full path for "g++" [2024-11-14 02:44:42,706 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:44:43,267 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:44:43,271 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2024-11-14 02:44:43,312 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/data/7823ce05c/095f5a659af340e2805c7a123bccfc98/FLAG46dbf7dfe [2024-11-14 02:44:43,335 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/data/7823ce05c/095f5a659af340e2805c7a123bccfc98 [2024-11-14 02:44:43,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:44:43,342 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:44:43,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:44:43,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:44:43,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:44:43,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:44:43" (1/1) ... [2024-11-14 02:44:43,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c26bb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:43, skipping insertion in model container [2024-11-14 02:44:43,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:44:43" (1/1) ... [2024-11-14 02:44:43,456 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:44:44,143 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_999d8246-1ec3-4923-9cf0-c52f36a00bc1/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2024-11-14 02:44:44,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:44:44,216 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:44:44,235 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2024-11-14 02:44:44,238 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [408] [2024-11-14 02:44:44,238 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [528] [2024-11-14 02:44:44,238 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [622] [2024-11-14 02:44:44,239 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2141] [2024-11-14 02:44:44,240 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2802] [2024-11-14 02:44:44,240 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2817] [2024-11-14 02:44:44,240 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3004] [2024-11-14 02:44:44,240 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3013] [2024-11-14 02:44:44,240 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3379] [2024-11-14 02:44:44,408 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_999d8246-1ec3-4923-9cf0-c52f36a00bc1/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2024-11-14 02:44:44,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:44:44,477 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:44:44,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44 WrapperNode [2024-11-14 02:44:44,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:44:44,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:44:44,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:44:44,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:44:44,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,615 INFO L138 Inliner]: procedures = 90, calls = 345, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 882 [2024-11-14 02:44:44,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:44:44,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:44:44,616 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:44:44,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:44:44,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,686 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,703 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:44:44,722 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:44:44,722 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:44:44,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:44:44,728 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (1/1) ... [2024-11-14 02:44:44,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:44:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:44,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:44:44,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:44:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:44:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-14 02:44:44,824 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-14 02:44:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-14 02:44:44,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-14 02:44:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-14 02:44:44,825 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-14 02:44:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-14 02:44:44,826 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-14 02:44:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-14 02:44:44,826 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-14 02:44:44,826 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-14 02:44:44,827 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-14 02:44:44,828 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-14 02:44:44,828 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-14 02:44:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-14 02:44:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-14 02:44:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-14 02:44:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-14 02:44:44,829 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-14 02:44:44,829 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-14 02:44:44,832 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-14 02:44:44,832 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-14 02:44:44,832 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-14 02:44:44,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-14 02:44:44,832 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-14 02:44:44,833 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-14 02:44:44,833 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-14 02:44:44,833 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-14 02:44:44,833 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-14 02:44:44,833 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-14 02:44:44,833 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-14 02:44:44,833 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-14 02:44:44,833 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-14 02:44:44,833 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-14 02:44:44,833 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-14 02:44:44,833 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-14 02:44:44,833 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-14 02:44:44,834 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-14 02:44:44,834 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-14 02:44:44,834 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-14 02:44:44,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:44:44,834 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-14 02:44:44,834 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-14 02:44:44,835 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-14 02:44:44,835 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-14 02:44:44,835 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-14 02:44:44,835 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-14 02:44:44,835 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-14 02:44:44,835 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-14 02:44:44,835 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2024-11-14 02:44:44,838 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2024-11-14 02:44:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:44:44,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:44:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-14 02:44:44,838 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-14 02:44:45,060 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:44:45,063 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:44:46,766 INFO L? ?]: Removed 458 outVars from TransFormulas that were not future-live. [2024-11-14 02:44:46,766 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:44:47,823 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:44:47,826 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 02:44:47,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:44:47 BoogieIcfgContainer [2024-11-14 02:44:47,850 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:44:47,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:44:47,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:44:47,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:44:47,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:44:43" (1/3) ... [2024-11-14 02:44:47,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dcdcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:44:47, skipping insertion in model container [2024-11-14 02:44:47,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:44" (2/3) ... [2024-11-14 02:44:47,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dcdcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:44:47, skipping insertion in model container [2024-11-14 02:44:47,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:44:47" (3/3) ... [2024-11-14 02:44:47,866 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2024-11-14 02:44:47,886 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:44:47,889 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG elevator_spec3_product21.cil.c that has 27 procedures, 404 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 02:44:47,978 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:44:47,991 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;@25812404, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:44:47,993 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:44:48,000 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) [2024-11-14 02:44:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 02:44:48,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:48,029 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:48,030 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:48,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash -626320390, now seen corresponding path program 1 times [2024-11-14 02:44:48,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:48,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101187358] [2024-11-14 02:44:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:48,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:49,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:49,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101187358] [2024-11-14 02:44:49,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101187358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:49,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:44:49,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 02:44:49,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486611725] [2024-11-14 02:44:49,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:49,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:44:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:44:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:44:49,460 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-14 02:44:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:51,152 INFO L93 Difference]: Finished difference Result 1138 states and 1820 transitions. [2024-11-14 02:44:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:44:51,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-11-14 02:44:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:51,187 INFO L225 Difference]: With dead ends: 1138 [2024-11-14 02:44:51,187 INFO L226 Difference]: Without dead ends: 736 [2024-11-14 02:44:51,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 02:44:51,211 INFO L432 NwaCegarLoop]: 629 mSDtfsCounter, 518 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:51,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 2830 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 02:44:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2024-11-14 02:44:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 729. [2024-11-14 02:44:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 489 states have (on average 1.5010224948875255) internal successors, (734), 519 states have internal predecessors, (734), 194 states have call successors, (194), 49 states have call predecessors, (194), 45 states have return successors, (195), 185 states have call predecessors, (195), 190 states have call successors, (195) [2024-11-14 02:44:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1123 transitions. [2024-11-14 02:44:51,453 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1123 transitions. Word has length 75 [2024-11-14 02:44:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:51,456 INFO L471 AbstractCegarLoop]: Abstraction has 729 states and 1123 transitions. [2024-11-14 02:44:51,456 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), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-14 02:44:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1123 transitions. [2024-11-14 02:44:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-14 02:44:51,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:51,470 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:51,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:44:51,471 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:51,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1120352062, now seen corresponding path program 1 times [2024-11-14 02:44:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:51,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012546931] [2024-11-14 02:44:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:51,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:52,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:52,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012546931] [2024-11-14 02:44:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012546931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:52,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:44:52,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 02:44:52,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426884347] [2024-11-14 02:44:52,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:52,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:44:52,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:52,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:44:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:44:52,260 INFO L87 Difference]: Start difference. First operand 729 states and 1123 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-14 02:44:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:53,469 INFO L93 Difference]: Finished difference Result 2116 states and 3318 transitions. [2024-11-14 02:44:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:44:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 81 [2024-11-14 02:44:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:53,495 INFO L225 Difference]: With dead ends: 2116 [2024-11-14 02:44:53,496 INFO L226 Difference]: Without dead ends: 1399 [2024-11-14 02:44:53,504 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 [2024-11-14 02:44:53,506 INFO L432 NwaCegarLoop]: 657 mSDtfsCounter, 576 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:53,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 2985 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 02:44:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2024-11-14 02:44:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1365. [2024-11-14 02:44:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 933 states have (on average 1.504823151125402) internal successors, (1404), 991 states have internal predecessors, (1404), 347 states have call successors, (347), 91 states have call predecessors, (347), 84 states have return successors, (376), 320 states have call predecessors, (376), 341 states have call successors, (376) [2024-11-14 02:44:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2127 transitions. [2024-11-14 02:44:53,742 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2127 transitions. Word has length 81 [2024-11-14 02:44:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:53,743 INFO L471 AbstractCegarLoop]: Abstraction has 1365 states and 2127 transitions. [2024-11-14 02:44:53,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-14 02:44:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2127 transitions. [2024-11-14 02:44:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-14 02:44:53,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:53,748 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:53,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:44:53,748 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:53,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:53,749 INFO L85 PathProgramCache]: Analyzing trace with hash -170590986, now seen corresponding path program 1 times [2024-11-14 02:44:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312743868] [2024-11-14 02:44:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:44:54,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312743868] [2024-11-14 02:44:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312743868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268071079] [2024-11-14 02:44:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:54,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:54,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:54,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:44:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:54,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:44:54,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:55,054 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:44:55,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268071079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:55,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:44:55,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 02:44:55,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77917821] [2024-11-14 02:44:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:55,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:44:55,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:44:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:44:55,057 INFO L87 Difference]: Start difference. First operand 1365 states and 2127 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-14 02:44:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:55,469 INFO L93 Difference]: Finished difference Result 3905 states and 6243 transitions. [2024-11-14 02:44:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:44:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 80 [2024-11-14 02:44:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:55,498 INFO L225 Difference]: With dead ends: 3905 [2024-11-14 02:44:55,498 INFO L226 Difference]: Without dead ends: 2552 [2024-11-14 02:44:55,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:44:55,512 INFO L432 NwaCegarLoop]: 629 mSDtfsCounter, 560 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:55,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1125 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:44:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2024-11-14 02:44:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2477. [2024-11-14 02:44:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 1703 states have (on average 1.5190839694656488) internal successors, (2587), 1819 states have internal predecessors, (2587), 616 states have call successors, (616), 162 states have call predecessors, (616), 157 states have return successors, (696), 571 states have call predecessors, (696), 610 states have call successors, (696) [2024-11-14 02:44:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3899 transitions. [2024-11-14 02:44:55,785 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3899 transitions. Word has length 80 [2024-11-14 02:44:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:55,786 INFO L471 AbstractCegarLoop]: Abstraction has 2477 states and 3899 transitions. [2024-11-14 02:44:55,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-14 02:44:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3899 transitions. [2024-11-14 02:44:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-14 02:44:55,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:55,795 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:55,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 02:44:55,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:55,996 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:55,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash 287606775, now seen corresponding path program 1 times [2024-11-14 02:44:55,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:55,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241864313] [2024-11-14 02:44:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:55,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:44:56,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241864313] [2024-11-14 02:44:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241864313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100853742] [2024-11-14 02:44:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:56,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:56,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:56,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:44:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:56,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:44:56,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:56,921 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:44:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100853742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:56,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:44:56,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 02:44:56,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569389410] [2024-11-14 02:44:56,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:56,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:44:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:44:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:44:56,924 INFO L87 Difference]: Start difference. First operand 2477 states and 3899 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-14 02:44:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:57,277 INFO L93 Difference]: Finished difference Result 5564 states and 8852 transitions. [2024-11-14 02:44:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:44:57,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2024-11-14 02:44:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:57,304 INFO L225 Difference]: With dead ends: 5564 [2024-11-14 02:44:57,304 INFO L226 Difference]: Without dead ends: 3099 [2024-11-14 02:44:57,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:44:57,324 INFO L432 NwaCegarLoop]: 606 mSDtfsCounter, 557 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:57,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:44:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2024-11-14 02:44:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 3056. [2024-11-14 02:44:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 2109 states have (on average 1.530583214793741) internal successors, (3228), 2254 states have internal predecessors, (3228), 753 states have call successors, (753), 196 states have call predecessors, (753), 193 states have return successors, (852), 701 states have call predecessors, (852), 747 states have call successors, (852) [2024-11-14 02:44:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4833 transitions. [2024-11-14 02:44:57,590 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4833 transitions. Word has length 81 [2024-11-14 02:44:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:57,591 INFO L471 AbstractCegarLoop]: Abstraction has 3056 states and 4833 transitions. [2024-11-14 02:44:57,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-14 02:44:57,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4833 transitions. [2024-11-14 02:44:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 02:44:57,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:57,597 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:57,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 02:44:57,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:57,801 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:57,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash 710175644, now seen corresponding path program 1 times [2024-11-14 02:44:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:57,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228182267] [2024-11-14 02:44:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:57,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:58,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228182267] [2024-11-14 02:44:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228182267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497797245] [2024-11-14 02:44:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:58,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:58,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:58,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:44:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:59,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:44:59,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:59,094 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:44:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497797245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:59,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:44:59,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-14 02:44:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362517650] [2024-11-14 02:44:59,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:59,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:44:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:44:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-14 02:44:59,096 INFO L87 Difference]: Start difference. First operand 3056 states and 4833 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 02:44:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:59,477 INFO L93 Difference]: Finished difference Result 5325 states and 8479 transitions. [2024-11-14 02:44:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:44:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2024-11-14 02:44:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:59,505 INFO L225 Difference]: With dead ends: 5325 [2024-11-14 02:44:59,505 INFO L226 Difference]: Without dead ends: 3086 [2024-11-14 02:44:59,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-14 02:44:59,523 INFO L432 NwaCegarLoop]: 585 mSDtfsCounter, 0 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:59,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2335 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:44:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2024-11-14 02:44:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 3086. [2024-11-14 02:44:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2139 states have (on average 1.523141654978962) internal successors, (3258), 2284 states have internal predecessors, (3258), 753 states have call successors, (753), 196 states have call predecessors, (753), 193 states have return successors, (852), 701 states have call predecessors, (852), 747 states have call successors, (852) [2024-11-14 02:44:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4863 transitions. [2024-11-14 02:44:59,763 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4863 transitions. Word has length 87 [2024-11-14 02:44:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:59,763 INFO L471 AbstractCegarLoop]: Abstraction has 3086 states and 4863 transitions. [2024-11-14 02:44:59,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 02:44:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4863 transitions. [2024-11-14 02:44:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-14 02:44:59,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:59,767 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:59,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:44:59,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:59,968 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:59,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1456208720, now seen corresponding path program 1 times [2024-11-14 02:44:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:59,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136371040] [2024-11-14 02:44:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:59,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:45:00,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136371040] [2024-11-14 02:45:00,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136371040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:00,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060368776] [2024-11-14 02:45:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:00,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:00,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:00,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:00,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:45:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:01,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:45:01,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:45:01,424 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:01,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060368776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:01,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:01,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-14 02:45:01,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296718658] [2024-11-14 02:45:01,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:01,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:45:01,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:45:01,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:01,426 INFO L87 Difference]: Start difference. First operand 3086 states and 4863 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 02:45:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:02,742 INFO L93 Difference]: Finished difference Result 5378 states and 8493 transitions. [2024-11-14 02:45:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:45:02,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2024-11-14 02:45:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:02,771 INFO L225 Difference]: With dead ends: 5378 [2024-11-14 02:45:02,771 INFO L226 Difference]: Without dead ends: 3125 [2024-11-14 02:45:02,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-11-14 02:45:02,789 INFO L432 NwaCegarLoop]: 651 mSDtfsCounter, 440 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:02,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2742 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 02:45:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2024-11-14 02:45:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3122. [2024-11-14 02:45:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 2163 states have (on average 1.5173370319001387) internal successors, (3282), 2304 states have internal predecessors, (3282), 753 states have call successors, (753), 200 states have call predecessors, (753), 205 states have return successors, (868), 713 states have call predecessors, (868), 747 states have call successors, (868) [2024-11-14 02:45:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 4903 transitions. [2024-11-14 02:45:03,015 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 4903 transitions. Word has length 89 [2024-11-14 02:45:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:03,016 INFO L471 AbstractCegarLoop]: Abstraction has 3122 states and 4903 transitions. [2024-11-14 02:45:03,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-14 02:45:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 4903 transitions. [2024-11-14 02:45:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-14 02:45:03,022 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:03,022 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:03,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 02:45:03,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:03,227 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:03,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1447012843, now seen corresponding path program 1 times [2024-11-14 02:45:03,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:03,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029782210] [2024-11-14 02:45:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:03,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:45:03,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029782210] [2024-11-14 02:45:03,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029782210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777373204] [2024-11-14 02:45:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:03,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:03,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:03,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:45:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:04,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 02:45:04,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:45:04,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 02:45:05,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777373204] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:05,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:45:05,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2024-11-14 02:45:05,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144926228] [2024-11-14 02:45:05,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:05,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 02:45:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 02:45:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-14 02:45:05,187 INFO L87 Difference]: Start difference. First operand 3122 states and 4903 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, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 02:45:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:09,465 INFO L93 Difference]: Finished difference Result 8012 states and 13254 transitions. [2024-11-14 02:45:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 02:45:09,466 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, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 91 [2024-11-14 02:45:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:09,523 INFO L225 Difference]: With dead ends: 8012 [2024-11-14 02:45:09,523 INFO L226 Difference]: Without dead ends: 6097 [2024-11-14 02:45:09,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 02:45:09,548 INFO L432 NwaCegarLoop]: 639 mSDtfsCounter, 2561 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 1181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2648 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1181 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:09,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2648 Valid, 2757 Invalid, 3139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1181 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 02:45:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6097 states. [2024-11-14 02:45:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6097 to 5998. [2024-11-14 02:45:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1854), 1280 states have call predecessors, (1854), 1333 states have call successors, (1854) [2024-11-14 02:45:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9693 transitions. [2024-11-14 02:45:10,111 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9693 transitions. Word has length 91 [2024-11-14 02:45:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:10,112 INFO L471 AbstractCegarLoop]: Abstraction has 5998 states and 9693 transitions. [2024-11-14 02:45:10,112 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, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 02:45:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9693 transitions. [2024-11-14 02:45:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 02:45:10,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:10,116 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:10,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 02:45:10,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 02:45:10,317 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:10,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash 211811579, now seen corresponding path program 1 times [2024-11-14 02:45:10,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:10,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642878653] [2024-11-14 02:45:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:45:11,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642878653] [2024-11-14 02:45:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642878653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232316348] [2024-11-14 02:45:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:11,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:11,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:11,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:11,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:45:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:11,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 02:45:11,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:45:11,688 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:11,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232316348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:11,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:11,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-14 02:45:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937100200] [2024-11-14 02:45:11,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:11,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:45:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:45:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-14 02:45:11,691 INFO L87 Difference]: Start difference. First operand 5998 states and 9693 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-14 02:45:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:12,741 INFO L93 Difference]: Finished difference Result 10805 states and 17544 transitions. [2024-11-14 02:45:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:45:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2024-11-14 02:45:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:12,827 INFO L225 Difference]: With dead ends: 10805 [2024-11-14 02:45:12,827 INFO L226 Difference]: Without dead ends: 6014 [2024-11-14 02:45:12,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:12,855 INFO L432 NwaCegarLoop]: 666 mSDtfsCounter, 419 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:12,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2385 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:45:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2024-11-14 02:45:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 5998. [2024-11-14 02:45:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1846), 1280 states have call predecessors, (1846), 1333 states have call successors, (1846) [2024-11-14 02:45:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9685 transitions. [2024-11-14 02:45:13,361 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9685 transitions. Word has length 96 [2024-11-14 02:45:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:13,362 INFO L471 AbstractCegarLoop]: Abstraction has 5998 states and 9685 transitions. [2024-11-14 02:45:13,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-14 02:45:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9685 transitions. [2024-11-14 02:45:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 02:45:13,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:13,371 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:13,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 02:45:13,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:13,571 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:13,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:13,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1220752793, now seen corresponding path program 1 times [2024-11-14 02:45:13,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:13,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297385884] [2024-11-14 02:45:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 02:45:14,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297385884] [2024-11-14 02:45:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297385884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715438818] [2024-11-14 02:45:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:14,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:14,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:45:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:14,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:45:14,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:45:14,836 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:14,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715438818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:14,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:14,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-14 02:45:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883750314] [2024-11-14 02:45:14,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:14,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:45:14,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:45:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:14,840 INFO L87 Difference]: Start difference. First operand 5998 states and 9685 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-14 02:45:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:15,454 INFO L93 Difference]: Finished difference Result 11347 states and 18688 transitions. [2024-11-14 02:45:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:45:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2024-11-14 02:45:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:15,500 INFO L225 Difference]: With dead ends: 11347 [2024-11-14 02:45:15,500 INFO L226 Difference]: Without dead ends: 6194 [2024-11-14 02:45:15,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:15,528 INFO L432 NwaCegarLoop]: 592 mSDtfsCounter, 0 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3523 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:15,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3523 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:45:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2024-11-14 02:45:15,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 6170. [2024-11-14 02:45:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 4363 states have (on average 1.5159294063717625) internal successors, (6614), 4611 states have internal predecessors, (6614), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 465 states have return successors, (2173), 1324 states have call predecessors, (2173), 1333 states have call successors, (2173) [2024-11-14 02:45:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 10128 transitions. [2024-11-14 02:45:15,975 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 10128 transitions. Word has length 122 [2024-11-14 02:45:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:15,975 INFO L471 AbstractCegarLoop]: Abstraction has 6170 states and 10128 transitions. [2024-11-14 02:45:15,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-14 02:45:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 10128 transitions. [2024-11-14 02:45:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 02:45:16,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:16,020 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:16,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 02:45:16,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:16,221 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:16,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 769571803, now seen corresponding path program 1 times [2024-11-14 02:45:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032792579] [2024-11-14 02:45:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 02:45:17,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:17,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032792579] [2024-11-14 02:45:17,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032792579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:17,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911366354] [2024-11-14 02:45:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:17,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:17,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:17,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:17,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:45:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:17,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:45:17,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:45:17,733 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:17,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911366354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:17,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:17,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-14 02:45:17,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741105818] [2024-11-14 02:45:17,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:17,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:45:17,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:17,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:45:17,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:17,736 INFO L87 Difference]: Start difference. First operand 6170 states and 10128 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-14 02:45:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:18,376 INFO L93 Difference]: Finished difference Result 11627 states and 19325 transitions. [2024-11-14 02:45:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:45:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2024-11-14 02:45:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:18,432 INFO L225 Difference]: With dead ends: 11627 [2024-11-14 02:45:18,432 INFO L226 Difference]: Without dead ends: 6310 [2024-11-14 02:45:18,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:18,533 INFO L432 NwaCegarLoop]: 595 mSDtfsCounter, 0 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3537 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:18,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3537 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:45:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2024-11-14 02:45:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 6198. [2024-11-14 02:45:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 4391 states have (on average 1.5126394898656343) internal successors, (6642), 4611 states have internal predecessors, (6642), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 465 states have return successors, (2173), 1352 states have call predecessors, (2173), 1333 states have call successors, (2173) [2024-11-14 02:45:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 10156 transitions. [2024-11-14 02:45:18,940 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 10156 transitions. Word has length 122 [2024-11-14 02:45:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:18,942 INFO L471 AbstractCegarLoop]: Abstraction has 6198 states and 10156 transitions. [2024-11-14 02:45:18,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-14 02:45:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 10156 transitions. [2024-11-14 02:45:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 02:45:18,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:18,949 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:18,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:45:19,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 02:45:19,153 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:19,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1350011701, now seen corresponding path program 1 times [2024-11-14 02:45:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:19,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442463680] [2024-11-14 02:45:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 02:45:19,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442463680] [2024-11-14 02:45:19,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442463680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:19,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977062797] [2024-11-14 02:45:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:19,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:19,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:19,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:19,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 02:45:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:20,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:45:20,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:45:20,347 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:20,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977062797] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:20,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:20,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-14 02:45:20,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591425018] [2024-11-14 02:45:20,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:20,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:45:20,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:45:20,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:20,350 INFO L87 Difference]: Start difference. First operand 6198 states and 10156 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-14 02:45:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:20,932 INFO L93 Difference]: Finished difference Result 11683 states and 19381 transitions. [2024-11-14 02:45:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:45:20,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 121 [2024-11-14 02:45:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:20,989 INFO L225 Difference]: With dead ends: 11683 [2024-11-14 02:45:20,989 INFO L226 Difference]: Without dead ends: 6338 [2024-11-14 02:45:21,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:45:21,025 INFO L432 NwaCegarLoop]: 595 mSDtfsCounter, 0 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3537 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:21,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3537 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:45:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6338 states. [2024-11-14 02:45:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6338 to 6226. [2024-11-14 02:45:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 4419 states have (on average 1.5093912649920798) internal successors, (6670), 4611 states have internal predecessors, (6670), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 465 states have return successors, (2173), 1380 states have call predecessors, (2173), 1333 states have call successors, (2173) [2024-11-14 02:45:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 10184 transitions. [2024-11-14 02:45:21,439 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 10184 transitions. Word has length 121 [2024-11-14 02:45:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:21,440 INFO L471 AbstractCegarLoop]: Abstraction has 6226 states and 10184 transitions. [2024-11-14 02:45:21,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-14 02:45:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 10184 transitions. [2024-11-14 02:45:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-14 02:45:21,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:21,448 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:21,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 02:45:21,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 02:45:21,649 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:21,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash -761329752, now seen corresponding path program 1 times [2024-11-14 02:45:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:21,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738034644] [2024-11-14 02:45:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:21,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 02:45:22,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:22,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738034644] [2024-11-14 02:45:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738034644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:22,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282647168] [2024-11-14 02:45:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:22,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:22,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:22,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 02:45:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:22,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 02:45:22,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:45:22,896 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282647168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:22,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-14 02:45:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788373322] [2024-11-14 02:45:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:22,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:45:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:45:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:45:22,899 INFO L87 Difference]: Start difference. First operand 6226 states and 10184 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-14 02:45:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:23,627 INFO L93 Difference]: Finished difference Result 12928 states and 21796 transitions. [2024-11-14 02:45:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:45:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 146 [2024-11-14 02:45:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:23,692 INFO L225 Difference]: With dead ends: 12928 [2024-11-14 02:45:23,692 INFO L226 Difference]: Without dead ends: 6043 [2024-11-14 02:45:23,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-14 02:45:23,841 INFO L432 NwaCegarLoop]: 634 mSDtfsCounter, 241 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2896 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:23,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2896 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:45:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2024-11-14 02:45:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 6027. [2024-11-14 02:45:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6027 states, 4248 states have (on average 1.4778719397363465) internal successors, (6278), 4458 states have internal predecessors, (6278), 1309 states have call successors, (1309), 372 states have call predecessors, (1309), 469 states have return successors, (2163), 1340 states have call predecessors, (2163), 1301 states have call successors, (2163) [2024-11-14 02:45:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 9750 transitions. [2024-11-14 02:45:24,474 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 9750 transitions. Word has length 146 [2024-11-14 02:45:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:24,476 INFO L471 AbstractCegarLoop]: Abstraction has 6027 states and 9750 transitions. [2024-11-14 02:45:24,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-14 02:45:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 9750 transitions. [2024-11-14 02:45:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-14 02:45:24,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:24,493 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:24,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 02:45:24,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 02:45:24,697 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:24,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash 842663913, now seen corresponding path program 1 times [2024-11-14 02:45:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:24,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787004281] [2024-11-14 02:45:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:24,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 02:45:25,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787004281] [2024-11-14 02:45:25,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787004281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:25,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294307323] [2024-11-14 02:45:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:25,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:25,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:25,353 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:25,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:45:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:25,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 02:45:25,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:45:25,963 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:25,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294307323] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:25,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:25,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-14 02:45:25,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654051835] [2024-11-14 02:45:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:25,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:45:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:45:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:45:25,966 INFO L87 Difference]: Start difference. First operand 6027 states and 9750 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-14 02:45:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:26,827 INFO L93 Difference]: Finished difference Result 13302 states and 22254 transitions. [2024-11-14 02:45:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:45:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 139 [2024-11-14 02:45:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:26,901 INFO L225 Difference]: With dead ends: 13302 [2024-11-14 02:45:26,901 INFO L226 Difference]: Without dead ends: 7944 [2024-11-14 02:45:26,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-14 02:45:26,942 INFO L432 NwaCegarLoop]: 601 mSDtfsCounter, 288 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:26,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 2792 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:45:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7944 states. [2024-11-14 02:45:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7944 to 7710. [2024-11-14 02:45:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7710 states, 5674 states have (on average 1.5035248501938667) internal successors, (8531), 5933 states have internal predecessors, (8531), 1489 states have call successors, (1489), 400 states have call predecessors, (1489), 546 states have return successors, (2343), 1520 states have call predecessors, (2343), 1481 states have call successors, (2343) [2024-11-14 02:45:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 12363 transitions. [2024-11-14 02:45:27,438 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 12363 transitions. Word has length 139 [2024-11-14 02:45:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:27,439 INFO L471 AbstractCegarLoop]: Abstraction has 7710 states and 12363 transitions. [2024-11-14 02:45:27,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2024-11-14 02:45:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 12363 transitions. [2024-11-14 02:45:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-14 02:45:27,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:27,451 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:27,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 02:45:27,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 02:45:27,652 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:27,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash -838668546, now seen corresponding path program 1 times [2024-11-14 02:45:27,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:27,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493787972] [2024-11-14 02:45:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:27,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 02:45:28,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493787972] [2024-11-14 02:45:28,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493787972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130348158] [2024-11-14 02:45:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:28,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:28,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:28,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 02:45:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:28,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 02:45:28,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 02:45:29,025 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:45:29,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130348158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:29,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:45:29,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2024-11-14 02:45:29,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744035797] [2024-11-14 02:45:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:29,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:45:29,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:45:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:45:29,028 INFO L87 Difference]: Start difference. First operand 7710 states and 12363 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-11-14 02:45:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:30,495 INFO L93 Difference]: Finished difference Result 19604 states and 31441 transitions. [2024-11-14 02:45:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:45:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 137 [2024-11-14 02:45:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:30,598 INFO L225 Difference]: With dead ends: 19604 [2024-11-14 02:45:30,599 INFO L226 Difference]: Without dead ends: 11906 [2024-11-14 02:45:30,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-14 02:45:30,656 INFO L432 NwaCegarLoop]: 700 mSDtfsCounter, 549 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:30,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1766 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 02:45:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11906 states. [2024-11-14 02:45:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11906 to 11743. [2024-11-14 02:45:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 8690 states have (on average 1.502186421173763) internal successors, (13054), 9028 states have internal predecessors, (13054), 2250 states have call successors, (2250), 595 states have call predecessors, (2250), 802 states have return successors, (3429), 2263 states have call predecessors, (3429), 2239 states have call successors, (3429) [2024-11-14 02:45:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 18733 transitions. [2024-11-14 02:45:31,528 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 18733 transitions. Word has length 137 [2024-11-14 02:45:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:31,528 INFO L471 AbstractCegarLoop]: Abstraction has 11743 states and 18733 transitions. [2024-11-14 02:45:31,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-11-14 02:45:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 18733 transitions. [2024-11-14 02:45:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-14 02:45:31,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:31,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:31,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 02:45:31,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 02:45:31,743 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:31,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash -649983637, now seen corresponding path program 1 times [2024-11-14 02:45:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:31,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706957198] [2024-11-14 02:45:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 02:45:32,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:32,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706957198] [2024-11-14 02:45:32,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706957198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:32,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297827494] [2024-11-14 02:45:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:32,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:32,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:32,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:32,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 02:45:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:32,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 02:45:32,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 02:45:33,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 02:45:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297827494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:45:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995688597] [2024-11-14 02:45:33,576 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2024-11-14 02:45:33,576 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:45:33,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:45:33,585 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:45:33,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:45:45,906 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 568 for LOIs [2024-11-14 02:45:59,692 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 442 for LOIs [2024-11-14 02:46:00,674 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2024-11-14 02:46:06,460 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2024-11-14 02:46:06,902 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 433 for LOIs [2024-11-14 02:46:07,082 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2024-11-14 02:46:07,291 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2024-11-14 02:46:15,516 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2024-11-14 02:46:16,165 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2024-11-14 02:46:16,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:46:31,556 WARN L286 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 595 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:46:37,778 WARN L286 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 595 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:46:43,471 WARN L286 SmtUtils]: Spent 5.50s 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) [2024-11-14 02:47:02,335 WARN L286 SmtUtils]: Spent 5.56s 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) [2024-11-14 02:47:08,101 WARN L286 SmtUtils]: Spent 5.52s 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) [2024-11-14 02:47:13,937 WARN L286 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:47:19,718 WARN L286 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:48:11,531 WARN L286 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 472 DAG size of output: 441 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:48:16,895 WARN L286 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 572 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:48:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [995688597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:48:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:48:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 12, 12] total 55 [2024-11-14 02:48:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339337185] [2024-11-14 02:48:32,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:48:32,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 02:48:32,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:48:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 02:48:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=2545, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 02:48:32,887 INFO L87 Difference]: Start difference. First operand 11743 states and 18733 transitions. Second operand has 29 states, 21 states have (on average 4.095238095238095) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-14 02:48:39,463 WARN L286 SmtUtils]: Spent 5.53s 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) [2024-11-14 02:48:45,294 WARN L286 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:49:02,533 WARN L286 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 574 DAG size of output: 572 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:49:07,826 WARN L286 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 576 DAG size of output: 574 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:49:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:49:44,287 INFO L93 Difference]: Finished difference Result 23603 states and 37648 transitions. [2024-11-14 02:49:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 02:49:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 4.095238095238095) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) Word has length 139 [2024-11-14 02:49:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:49:44,378 INFO L225 Difference]: With dead ends: 23603 [2024-11-14 02:49:44,378 INFO L226 Difference]: Without dead ends: 11872 [2024-11-14 02:49:44,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 372 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 168.9s TimeCoverageRelationStatistics Valid=521, Invalid=3139, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 02:49:44,438 INFO L432 NwaCegarLoop]: 603 mSDtfsCounter, 229 mSDsluCounter, 4658 mSDsCounter, 0 mSdLazyCounter, 8226 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 5261 SdHoareTripleChecker+Invalid, 8282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 8226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:49:44,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 5261 Invalid, 8282 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 8226 Invalid, 0 Unknown, 0 Unchecked, 38.4s Time] [2024-11-14 02:49:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11872 states. [2024-11-14 02:49:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11872 to 11793. [2024-11-14 02:49:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11793 states, 8728 states have (on average 1.5004582951420715) internal successors, (13096), 9065 states have internal predecessors, (13096), 2257 states have call successors, (2257), 601 states have call predecessors, (2257), 807 states have return successors, (3435), 2270 states have call predecessors, (3435), 2246 states have call successors, (3435) [2024-11-14 02:49:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11793 states to 11793 states and 18788 transitions. [2024-11-14 02:49:45,611 INFO L78 Accepts]: Start accepts. Automaton has 11793 states and 18788 transitions. Word has length 139 [2024-11-14 02:49:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:49:45,612 INFO L471 AbstractCegarLoop]: Abstraction has 11793 states and 18788 transitions. [2024-11-14 02:49:45,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 4.095238095238095) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-14 02:49:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 11793 states and 18788 transitions. [2024-11-14 02:49:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 02:49:45,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:49:45,623 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:49:45,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 02:49:45,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 02:49:45,827 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:49:45,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:49:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash -557773329, now seen corresponding path program 1 times [2024-11-14 02:49:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:49:45,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304960597] [2024-11-14 02:49:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:49:45,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:49:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:49:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 02:49:46,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:49:46,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304960597] [2024-11-14 02:49:46,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304960597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:49:46,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966324696] [2024-11-14 02:49:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:49:46,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:49:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:49:46,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:49:46,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 02:49:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:49:47,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 02:49:47,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:49:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 02:49:47,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:49:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 02:49:48,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966324696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:49:48,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006777826] [2024-11-14 02:49:48,046 INFO L159 IcfgInterpreter]: Started Sifa with 126 locations of interest [2024-11-14 02:49:48,046 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:49:48,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:49:48,047 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:49:48,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:50:01,936 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 568 for LOIs [2024-11-14 02:50:20,090 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 56 for LOIs [2024-11-14 02:50:20,120 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2024-11-14 02:50:26,501 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2024-11-14 02:50:26,955 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 433 for LOIs [2024-11-14 02:50:27,142 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2024-11-14 02:50:27,350 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2024-11-14 02:50:35,754 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2024-11-14 02:50:36,390 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2024-11-14 02:50:36,755 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:50:51,779 WARN L286 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 595 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:50:58,056 WARN L286 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 595 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:51:03,777 WARN L286 SmtUtils]: Spent 5.55s 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) [2024-11-14 02:51:22,790 WARN L286 SmtUtils]: Spent 5.61s 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) [2024-11-14 02:51:28,709 WARN L286 SmtUtils]: Spent 5.69s 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) [2024-11-14 02:51:34,694 WARN L286 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:51:40,589 WARN L286 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:52:21,481 WARN L286 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 572 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:52:32,703 WARN L286 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 572 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:52:43,504 WARN L286 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 572 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:52:54,374 WARN L286 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 572 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:52:54,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1006777826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:52:54,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:54,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 12, 12] total 52 [2024-11-14 02:52:54,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684794263] [2024-11-14 02:52:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:52:54,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 02:52:54,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 02:52:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2249, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 02:52:54,381 INFO L87 Difference]: Start difference. First operand 11793 states and 18788 transitions. Second operand has 31 states, 23 states have (on average 3.869565217391304) internal successors, (89), 19 states have internal predecessors, (89), 9 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-14 02:53:00,792 WARN L286 SmtUtils]: Spent 5.64s 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) [2024-11-14 02:53:06,637 WARN L286 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:53:12,432 WARN L286 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 570 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:53:23,328 WARN L286 SmtUtils]: Spent 5.04s 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) [2024-11-14 02:53:28,584 WARN L286 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 573 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:53:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:53:52,928 INFO L93 Difference]: Finished difference Result 23581 states and 37612 transitions. [2024-11-14 02:53:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 02:53:52,929 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 3.869565217391304) internal successors, (89), 19 states have internal predecessors, (89), 9 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) Word has length 145 [2024-11-14 02:53:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:53:53,033 INFO L225 Difference]: With dead ends: 23581 [2024-11-14 02:53:53,033 INFO L226 Difference]: Without dead ends: 11862 [2024-11-14 02:53:53,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 170.1s TimeCoverageRelationStatistics Valid=491, Invalid=2815, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 02:53:53,100 INFO L432 NwaCegarLoop]: 600 mSDtfsCounter, 227 mSDsluCounter, 3830 mSDsCounter, 0 mSdLazyCounter, 5781 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 4430 SdHoareTripleChecker+Invalid, 5832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:53:53,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 4430 Invalid, 5832 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [51 Valid, 5781 Invalid, 0 Unknown, 0 Unchecked, 25.5s Time] [2024-11-14 02:53:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11862 states. [2024-11-14 02:53:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11862 to 11795. [2024-11-14 02:53:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11795 states, 8729 states have (on average 1.5002864016496735) internal successors, (13096), 9066 states have internal predecessors, (13096), 2257 states have call successors, (2257), 602 states have call predecessors, (2257), 808 states have return successors, (3435), 2270 states have call predecessors, (3435), 2246 states have call successors, (3435) [2024-11-14 02:53:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11795 states to 11795 states and 18788 transitions. [2024-11-14 02:53:54,044 INFO L78 Accepts]: Start accepts. Automaton has 11795 states and 18788 transitions. Word has length 145 [2024-11-14 02:53:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:53:54,044 INFO L471 AbstractCegarLoop]: Abstraction has 11795 states and 18788 transitions. [2024-11-14 02:53:54,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 3.869565217391304) internal successors, (89), 19 states have internal predecessors, (89), 9 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-14 02:53:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 11795 states and 18788 transitions. [2024-11-14 02:53:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-14 02:53:54,051 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:53:54,052 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:53:54,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 02:53:54,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 02:53:54,254 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:53:54,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:53:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1113192484, now seen corresponding path program 1 times [2024-11-14 02:53:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:53:54,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412784620] [2024-11-14 02:53:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:54,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:53:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 02:53:54,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:53:54,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412784620] [2024-11-14 02:53:54,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412784620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:53:54,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820807177] [2024-11-14 02:53:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:53:54,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:53:54,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:53:54,704 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:53:54,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 02:53:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:53:55,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 02:53:55,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:53:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 02:53:55,524 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:53:55,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820807177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:53:55,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:53:55,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2024-11-14 02:53:55,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413505335] [2024-11-14 02:53:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:53:55,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 02:53:55,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:53:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 02:53:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-14 02:53:55,527 INFO L87 Difference]: Start difference. First operand 11795 states and 18788 transitions. Second operand has 12 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 5 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-14 02:54:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:02,640 INFO L93 Difference]: Finished difference Result 41536 states and 70289 transitions. [2024-11-14 02:54:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 02:54:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 5 states have call successors, (25), 5 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 154 [2024-11-14 02:54:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:02,921 INFO L225 Difference]: With dead ends: 41536 [2024-11-14 02:54:02,922 INFO L226 Difference]: Without dead ends: 31760 [2024-11-14 02:54:03,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 02:54:03,043 INFO L432 NwaCegarLoop]: 478 mSDtfsCounter, 2374 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 5910 mSolverCounterSat, 1116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2480 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 7026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1116 IncrementalHoareTripleChecker+Valid, 5910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:03,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2480 Valid, 3409 Invalid, 7026 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1116 Valid, 5910 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 02:54:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31760 states. [2024-11-14 02:54:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31760 to 30472. [2024-11-14 02:54:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30472 states, 23387 states have (on average 1.4199769102492839) internal successors, (33209), 24049 states have internal predecessors, (33209), 4760 states have call successors, (4760), 1527 states have call predecessors, (4760), 2324 states have return successors, (10401), 5093 states have call predecessors, (10401), 4746 states have call successors, (10401) [2024-11-14 02:54:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30472 states to 30472 states and 48370 transitions. [2024-11-14 02:54:05,216 INFO L78 Accepts]: Start accepts. Automaton has 30472 states and 48370 transitions. Word has length 154 [2024-11-14 02:54:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:05,217 INFO L471 AbstractCegarLoop]: Abstraction has 30472 states and 48370 transitions. [2024-11-14 02:54:05,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 5 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-14 02:54:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 30472 states and 48370 transitions. [2024-11-14 02:54:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-14 02:54:05,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:05,231 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 02:54:05,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 02:54:05,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 02:54:05,435 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:05,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash -272728119, now seen corresponding path program 1 times [2024-11-14 02:54:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:05,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458203418] [2024-11-14 02:54:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:05,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 02:54:06,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458203418] [2024-11-14 02:54:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458203418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072073368] [2024-11-14 02:54:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:06,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:06,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:06,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:06,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 02:54:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:07,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:54:07,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 02:54:07,046 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:07,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072073368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:07,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:54:07,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2024-11-14 02:54:07,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133858932] [2024-11-14 02:54:07,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:07,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:07,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:07,048 INFO L87 Difference]: Start difference. First operand 30472 states and 48370 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2024-11-14 02:54:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:08,429 INFO L93 Difference]: Finished difference Result 59064 states and 94448 transitions. [2024-11-14 02:54:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 162 [2024-11-14 02:54:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:08,703 INFO L225 Difference]: With dead ends: 59064 [2024-11-14 02:54:08,704 INFO L226 Difference]: Without dead ends: 30607 [2024-11-14 02:54:08,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:08,906 INFO L432 NwaCegarLoop]: 588 mSDtfsCounter, 17 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:08,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1139 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:54:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30607 states. [2024-11-14 02:54:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30607 to 30598. [2024-11-14 02:54:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30598 states, 23495 states have (on average 1.4188125133007023) internal successors, (33335), 24157 states have internal predecessors, (33335), 4778 states have call successors, (4778), 1527 states have call predecessors, (4778), 2324 states have return successors, (10419), 5111 states have call predecessors, (10419), 4764 states have call successors, (10419) [2024-11-14 02:54:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30598 states to 30598 states and 48532 transitions. [2024-11-14 02:54:10,895 INFO L78 Accepts]: Start accepts. Automaton has 30598 states and 48532 transitions. Word has length 162 [2024-11-14 02:54:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:10,895 INFO L471 AbstractCegarLoop]: Abstraction has 30598 states and 48532 transitions. [2024-11-14 02:54:10,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2024-11-14 02:54:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30598 states and 48532 transitions. [2024-11-14 02:54:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 02:54:10,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:10,904 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 02:54:10,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:11,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 02:54:11,104 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:11,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash 533516490, now seen corresponding path program 1 times [2024-11-14 02:54:11,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:11,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558715100] [2024-11-14 02:54:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 02:54:12,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558715100] [2024-11-14 02:54:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558715100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785889401] [2024-11-14 02:54:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:12,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:12,095 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:12,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 02:54:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:12,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 02:54:12,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 02:54:12,785 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:12,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785889401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:12,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:54:12,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2024-11-14 02:54:12,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799880913] [2024-11-14 02:54:12,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:12,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:54:12,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:54:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:12,787 INFO L87 Difference]: Start difference. First operand 30598 states and 48532 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2024-11-14 02:54:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:14,819 INFO L93 Difference]: Finished difference Result 70610 states and 113184 transitions. [2024-11-14 02:54:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:54:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 161 [2024-11-14 02:54:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:15,433 INFO L225 Difference]: With dead ends: 70610 [2024-11-14 02:54:15,437 INFO L226 Difference]: Without dead ends: 40088 [2024-11-14 02:54:15,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:54:15,865 INFO L432 NwaCegarLoop]: 822 mSDtfsCounter, 482 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:15,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 1386 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:54:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40088 states. [2024-11-14 02:54:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40088 to 39836. [2024-11-14 02:54:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39836 states, 30657 states have (on average 1.4195126724728446) internal successors, (43518), 31520 states have internal predecessors, (43518), 6148 states have call successors, (6148), 1966 states have call predecessors, (6148), 3030 states have return successors, (13631), 6601 states have call predecessors, (13631), 6134 states have call successors, (13631) [2024-11-14 02:54:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39836 states to 39836 states and 63297 transitions. [2024-11-14 02:54:18,792 INFO L78 Accepts]: Start accepts. Automaton has 39836 states and 63297 transitions. Word has length 161 [2024-11-14 02:54:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:18,792 INFO L471 AbstractCegarLoop]: Abstraction has 39836 states and 63297 transitions. [2024-11-14 02:54:18,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2024-11-14 02:54:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 39836 states and 63297 transitions. [2024-11-14 02:54:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-14 02:54:18,802 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:18,802 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 02:54:18,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 02:54:19,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:19,003 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:19,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1556202586, now seen corresponding path program 1 times [2024-11-14 02:54:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:19,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597320763] [2024-11-14 02:54:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:19,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 02:54:20,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:20,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597320763] [2024-11-14 02:54:20,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597320763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:20,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235279676] [2024-11-14 02:54:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:20,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:20,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:20,141 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:20,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 02:54:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:20,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:54:20,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 02:54:20,816 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:20,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235279676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:20,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:54:20,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 22 [2024-11-14 02:54:20,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619265466] [2024-11-14 02:54:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:20,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:54:20,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:54:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:54:20,817 INFO L87 Difference]: Start difference. First operand 39836 states and 63297 transitions. Second operand has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2024-11-14 02:54:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:25,055 INFO L93 Difference]: Finished difference Result 90113 states and 150429 transitions. [2024-11-14 02:54:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:54:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 162 [2024-11-14 02:54:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:25,496 INFO L225 Difference]: With dead ends: 90113 [2024-11-14 02:54:25,497 INFO L226 Difference]: Without dead ends: 52296 [2024-11-14 02:54:25,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-14 02:54:25,942 INFO L432 NwaCegarLoop]: 925 mSDtfsCounter, 543 mSDsluCounter, 2488 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:25,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 3413 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 02:54:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52296 states. [2024-11-14 02:54:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52296 to 51862. [2024-11-14 02:54:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51862 states, 39159 states have (on average 1.4124977655200592) internal successors, (55312), 40412 states have internal predecessors, (55312), 8771 states have call successors, (8771), 2753 states have call predecessors, (8771), 3931 states have return successors, (17622), 9164 states have call predecessors, (17622), 8748 states have call successors, (17622) [2024-11-14 02:54:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51862 states to 51862 states and 81705 transitions. [2024-11-14 02:54:29,753 INFO L78 Accepts]: Start accepts. Automaton has 51862 states and 81705 transitions. Word has length 162 [2024-11-14 02:54:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:29,754 INFO L471 AbstractCegarLoop]: Abstraction has 51862 states and 81705 transitions. [2024-11-14 02:54:29,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2024-11-14 02:54:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 51862 states and 81705 transitions. [2024-11-14 02:54:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-14 02:54:29,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:29,772 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 02:54:29,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 02:54:29,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:29,973 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:29,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:29,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1840761856, now seen corresponding path program 1 times [2024-11-14 02:54:29,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:29,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640292043] [2024-11-14 02:54:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 02:54:31,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640292043] [2024-11-14 02:54:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640292043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347988336] [2024-11-14 02:54:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:31,065 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:31,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 02:54:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:31,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 1976 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 02:54:31,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 02:54:31,963 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:31,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347988336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:31,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:54:31,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 26 [2024-11-14 02:54:31,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176286556] [2024-11-14 02:54:31,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:31,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:54:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:31,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:54:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2024-11-14 02:54:31,965 INFO L87 Difference]: Start difference. First operand 51862 states and 81705 transitions. Second operand has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 4 states have call successors, (27), 3 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2024-11-14 02:54:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:36,897 INFO L93 Difference]: Finished difference Result 109584 states and 174299 transitions. [2024-11-14 02:54:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 02:54:36,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 4 states have call successors, (27), 3 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) Word has length 164 [2024-11-14 02:54:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:37,556 INFO L225 Difference]: With dead ends: 109584 [2024-11-14 02:54:37,556 INFO L226 Difference]: Without dead ends: 56876 [2024-11-14 02:54:38,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2024-11-14 02:54:38,036 INFO L432 NwaCegarLoop]: 947 mSDtfsCounter, 514 mSDsluCounter, 5808 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 6755 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:38,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 6755 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 02:54:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56876 states. [2024-11-14 02:54:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56876 to 51866. [2024-11-14 02:54:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51866 states, 39282 states have (on average 1.4115625477317855) internal successors, (55449), 40398 states have internal predecessors, (55449), 8388 states have call successors, (8388), 2715 states have call predecessors, (8388), 4195 states have return successors, (18132), 9166 states have call predecessors, (18132), 8356 states have call successors, (18132) [2024-11-14 02:54:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51866 states to 51866 states and 81969 transitions. [2024-11-14 02:54:42,140 INFO L78 Accepts]: Start accepts. Automaton has 51866 states and 81969 transitions. Word has length 164 [2024-11-14 02:54:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:42,140 INFO L471 AbstractCegarLoop]: Abstraction has 51866 states and 81969 transitions. [2024-11-14 02:54:42,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 4 states have call successors, (27), 3 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2024-11-14 02:54:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 51866 states and 81969 transitions. [2024-11-14 02:54:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-14 02:54:42,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:42,164 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 02:54:42,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 02:54:42,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:42,369 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:42,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:42,369 INFO L85 PathProgramCache]: Analyzing trace with hash 68019192, now seen corresponding path program 1 times [2024-11-14 02:54:42,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:42,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272292951] [2024-11-14 02:54:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:42,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 02:54:43,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:43,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272292951] [2024-11-14 02:54:43,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272292951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:43,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747327955] [2024-11-14 02:54:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:43,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:43,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:43,929 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:43,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 02:54:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:44,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 1986 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 02:54:44,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 02:54:44,631 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:44,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747327955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:44,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:54:44,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2024-11-14 02:54:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203278829] [2024-11-14 02:54:44,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:44,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 02:54:44,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 02:54:44,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2024-11-14 02:54:44,633 INFO L87 Difference]: Start difference. First operand 51866 states and 81969 transitions. Second operand has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2024-11-14 02:54:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:54:48,827 INFO L93 Difference]: Finished difference Result 101826 states and 161091 transitions. [2024-11-14 02:54:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 02:54:48,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 166 [2024-11-14 02:54:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:54:49,488 INFO L225 Difference]: With dead ends: 101826 [2024-11-14 02:54:49,489 INFO L226 Difference]: Without dead ends: 52072 [2024-11-14 02:54:49,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2024-11-14 02:54:49,760 INFO L432 NwaCegarLoop]: 966 mSDtfsCounter, 515 mSDsluCounter, 4584 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 5550 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:54:49,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 5550 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 02:54:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52072 states. [2024-11-14 02:54:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52072 to 51979. [2024-11-14 02:54:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51979 states, 39368 states have (on average 1.4107650883966674) internal successors, (55539), 40468 states have internal predecessors, (55539), 8415 states have call successors, (8415), 2745 states have call predecessors, (8415), 4195 states have return successors, (18132), 9179 states have call predecessors, (18132), 8383 states have call successors, (18132) [2024-11-14 02:54:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51979 states to 51979 states and 82086 transitions. [2024-11-14 02:54:52,935 INFO L78 Accepts]: Start accepts. Automaton has 51979 states and 82086 transitions. Word has length 166 [2024-11-14 02:54:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:54:52,936 INFO L471 AbstractCegarLoop]: Abstraction has 51979 states and 82086 transitions. [2024-11-14 02:54:52,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2024-11-14 02:54:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 51979 states and 82086 transitions. [2024-11-14 02:54:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-14 02:54:52,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:54:52,947 INFO L215 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 02:54:52,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 02:54:53,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:53,148 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:54:53,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:54:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash 695737965, now seen corresponding path program 1 times [2024-11-14 02:54:53,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:54:53,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966967688] [2024-11-14 02:54:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:53,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:54:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 02:54:53,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:54:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966967688] [2024-11-14 02:54:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966967688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:54:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330542690] [2024-11-14 02:54:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:54:53,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:54:53,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:54:53,894 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:54:53,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 02:54:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:54:54,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 1986 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:54:54,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:54:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 02:54:54,672 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:54:54,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330542690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:54:54,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:54:54,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 22 [2024-11-14 02:54:54,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420705888] [2024-11-14 02:54:54,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:54:54,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:54:54,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:54:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:54:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:54:54,674 INFO L87 Difference]: Start difference. First operand 51979 states and 82086 transitions. Second operand has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2024-11-14 02:55:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:00,077 INFO L93 Difference]: Finished difference Result 107991 states and 179803 transitions. [2024-11-14 02:55:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:55:00,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) Word has length 167 [2024-11-14 02:55:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:00,449 INFO L225 Difference]: With dead ends: 107991 [2024-11-14 02:55:00,450 INFO L226 Difference]: Without dead ends: 57892 [2024-11-14 02:55:00,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-11-14 02:55:00,822 INFO L432 NwaCegarLoop]: 608 mSDtfsCounter, 582 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:00,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 2184 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 02:55:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57892 states. [2024-11-14 02:55:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57892 to 56880. [2024-11-14 02:55:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56880 states, 42047 states have (on average 1.393155278616786) internal successors, (58578), 43492 states have internal predecessors, (58578), 10118 states have call successors, (10118), 3371 states have call predecessors, (10118), 4714 states have return successors, (21497), 10628 states have call predecessors, (21497), 10062 states have call successors, (21497) [2024-11-14 02:55:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56880 states to 56880 states and 90193 transitions. [2024-11-14 02:55:05,337 INFO L78 Accepts]: Start accepts. Automaton has 56880 states and 90193 transitions. Word has length 167 [2024-11-14 02:55:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:05,338 INFO L471 AbstractCegarLoop]: Abstraction has 56880 states and 90193 transitions. [2024-11-14 02:55:05,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 5 states have call predecessors, (28), 4 states have call successors, (28) [2024-11-14 02:55:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 56880 states and 90193 transitions. [2024-11-14 02:55:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-14 02:55:05,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:05,358 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 02:55:05,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 02:55:05,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:05,559 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:05,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 355345122, now seen corresponding path program 1 times [2024-11-14 02:55:05,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:55:05,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235941039] [2024-11-14 02:55:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:55:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 02:55:06,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:55:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235941039] [2024-11-14 02:55:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235941039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:55:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174458953] [2024-11-14 02:55:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:06,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:55:06,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:06,548 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:55:06,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_999d8246-1ec3-4923-9cf0-c52f36a00bc1/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 02:55:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:07,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 1997 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 02:55:07,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:55:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 02:55:07,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:55:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 02:55:08,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174458953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:55:08,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108173038] [2024-11-14 02:55:08,341 INFO L159 IcfgInterpreter]: Started Sifa with 110 locations of interest [2024-11-14 02:55:08,341 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:55:08,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:55:08,342 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:55:08,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:55:27,115 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 605 for LOIs