./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.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_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/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_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/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_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:16:48,620 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:16:48,736 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:16:48,744 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:16:48,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:16:48,783 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:16:48,784 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:16:48,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:16:48,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:16:48,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:16:48,786 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:16:48,787 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:16:48,787 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:16:48,787 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:16:48,787 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:16:48,788 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:16:48,788 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:16:48,788 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:16:48,788 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:16:48,788 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:16:48,789 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:16:48,789 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:16:48,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:16:48,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:16:48,790 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:16:48,790 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:16:48,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:16:48,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:16:48,790 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:16:48,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:16:48,790 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:16:48,791 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:16:48,791 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:16:48,791 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:16:48,791 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:16:48,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:16:48,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:16:48,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:16:48,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:48,793 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:16:48,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:16:48,793 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:16:48,793 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:16:48,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:16:48,793 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:16:48,793 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:16:48,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:16:48,793 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_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/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 -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2024-11-14 04:16:49,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:16:49,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:16:49,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:16:49,142 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:16:49,142 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:16:49,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c Unable to find full path for "g++" [2024-11-14 04:16:51,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:16:51,461 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:16:51,464 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2024-11-14 04:16:51,488 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/data/024cd132d/93771053ea164521afc0bcd3b2d05e4d/FLAG3645234fb [2024-11-14 04:16:51,598 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/data/024cd132d/93771053ea164521afc0bcd3b2d05e4d [2024-11-14 04:16:51,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:16:51,603 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:16:51,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:51,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:16:51,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:16:51,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:51" (1/1) ... [2024-11-14 04:16:51,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14846026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:51, skipping insertion in model container [2024-11-14 04:16:51,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:16:51" (1/1) ... [2024-11-14 04:16:51,667 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:16:52,332 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_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2024-11-14 04:16:52,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:52,351 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:16:52,361 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [48] [2024-11-14 04:16:52,363 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1613] [2024-11-14 04:16:52,364 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1707] [2024-11-14 04:16:52,364 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [1825] [2024-11-14 04:16:52,364 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2012] [2024-11-14 04:16:52,365 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2030] [2024-11-14 04:16:52,366 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2381] [2024-11-14 04:16:52,366 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3042] [2024-11-14 04:16:52,366 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3077] [2024-11-14 04:16:52,366 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3443] [2024-11-14 04:16:52,569 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_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2024-11-14 04:16:52,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:16:52,613 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:16:52,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52 WrapperNode [2024-11-14 04:16:52,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:16:52,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:52,617 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:16:52,617 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:16:52,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,740 INFO L138 Inliner]: procedures = 93, calls = 348, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1133 [2024-11-14 04:16:52,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:16:52,741 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:16:52,741 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:16:52,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:16:52,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,760 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,805 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:16:52,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:16:52,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:16:52,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:16:52,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (1/1) ... [2024-11-14 04:16:52,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:16:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:52,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:16:52,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:16:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:16:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-14 04:16:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-14 04:16:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-14 04:16:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-14 04:16:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-14 04:16:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-14 04:16:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-14 04:16:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-14 04:16:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-14 04:16:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-14 04:16:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-14 04:16:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-14 04:16:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-14 04:16:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-14 04:16:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-14 04:16:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-14 04:16:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-14 04:16:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-14 04:16:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-14 04:16:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-14 04:16:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-14 04:16:52,912 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-14 04:16:52,912 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-14 04:16:52,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-14 04:16:52,912 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-14 04:16:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-14 04:16:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-14 04:16:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-14 04:16:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-14 04:16:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-14 04:16:52,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:16:52,917 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-14 04:16:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-14 04:16:52,917 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-14 04:16:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-14 04:16:52,917 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-14 04:16:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-14 04:16:52,917 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-14 04:16:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-14 04:16:52,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:16:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:16:52,917 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-14 04:16:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-14 04:16:53,128 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:16:53,132 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:16:55,007 INFO L? ?]: Removed 469 outVars from TransFormulas that were not future-live. [2024-11-14 04:16:55,007 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:16:56,058 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:16:56,061 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:16:56,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:56 BoogieIcfgContainer [2024-11-14 04:16:56,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:16:56,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:16:56,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:16:56,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:16:56,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:16:51" (1/3) ... [2024-11-14 04:16:56,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff52a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:56, skipping insertion in model container [2024-11-14 04:16:56,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:16:52" (2/3) ... [2024-11-14 04:16:56,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff52a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:16:56, skipping insertion in model container [2024-11-14 04:16:56,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:16:56" (3/3) ... [2024-11-14 04:16:56,072 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product27.cil.c [2024-11-14 04:16:56,089 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:16:56,093 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG elevator_spec3_product27.cil.c that has 28 procedures, 410 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:16:56,171 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:16:56,183 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;@579540ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:16:56,183 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:16:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-14 04:16:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 04:16:56,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:56,212 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:56,213 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:56,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash -136210460, now seen corresponding path program 1 times [2024-11-14 04:16:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:56,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476033965] [2024-11-14 04:16:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:16:57,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:57,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476033965] [2024-11-14 04:16:57,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476033965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:57,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:16:57,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:16:57,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391135017] [2024-11-14 04:16:57,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:57,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:16:57,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:16:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:57,701 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:16:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:58,958 INFO L93 Difference]: Finished difference Result 1181 states and 1890 transitions. [2024-11-14 04:16:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:16:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2024-11-14 04:16:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:58,981 INFO L225 Difference]: With dead ends: 1181 [2024-11-14 04:16:58,981 INFO L226 Difference]: Without dead ends: 773 [2024-11-14 04:16:58,995 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 04:16:59,002 INFO L432 NwaCegarLoop]: 652 mSDtfsCounter, 590 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:59,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 2974 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:16:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2024-11-14 04:16:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 754. [2024-11-14 04:16:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 514 states have (on average 1.5603112840466926) internal successors, (802), 544 states have internal predecessors, (802), 193 states have call successors, (193), 49 states have call predecessors, (193), 46 states have return successors, (200), 180 states have call predecessors, (200), 189 states have call successors, (200) [2024-11-14 04:16:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1195 transitions. [2024-11-14 04:16:59,205 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1195 transitions. Word has length 88 [2024-11-14 04:16:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:59,207 INFO L471 AbstractCegarLoop]: Abstraction has 754 states and 1195 transitions. [2024-11-14 04:16:59,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:16:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1195 transitions. [2024-11-14 04:16:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 04:16:59,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:59,213 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:59,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:16:59,214 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:59,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash 6447040, now seen corresponding path program 1 times [2024-11-14 04:16:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:59,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494415705] [2024-11-14 04:16:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:59,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:16:59,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:59,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494415705] [2024-11-14 04:16:59,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494415705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:59,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121133283] [2024-11-14 04:16:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:59,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:59,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:17:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:00,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:17:00,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:17:00,604 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:00,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121133283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:00,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:00,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 04:17:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388687000] [2024-11-14 04:17:00,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:00,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:17:00,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:17:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:17:00,610 INFO L87 Difference]: Start difference. First operand 754 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:17:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:01,012 INFO L93 Difference]: Finished difference Result 2138 states and 3454 transitions. [2024-11-14 04:17:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:17:01,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2024-11-14 04:17:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:01,035 INFO L225 Difference]: With dead ends: 2138 [2024-11-14 04:17:01,035 INFO L226 Difference]: Without dead ends: 1396 [2024-11-14 04:17:01,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:17:01,044 INFO L432 NwaCegarLoop]: 1022 mSDtfsCounter, 565 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:01,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1526 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:17:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2024-11-14 04:17:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1363. [2024-11-14 04:17:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 936 states have (on average 1.5694444444444444) internal successors, (1469), 995 states have internal predecessors, (1469), 339 states have call successors, (339), 88 states have call predecessors, (339), 87 states have return successors, (366), 319 states have call predecessors, (366), 335 states have call successors, (366) [2024-11-14 04:17:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2174 transitions. [2024-11-14 04:17:01,222 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2174 transitions. Word has length 87 [2024-11-14 04:17:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:01,225 INFO L471 AbstractCegarLoop]: Abstraction has 1363 states and 2174 transitions. [2024-11-14 04:17:01,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:17:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2174 transitions. [2024-11-14 04:17:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-14 04:17:01,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:01,233 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:01,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:17:01,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 04:17:01,435 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:01,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:01,435 INFO L85 PathProgramCache]: Analyzing trace with hash -902933184, now seen corresponding path program 1 times [2024-11-14 04:17:01,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:01,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247587105] [2024-11-14 04:17:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:01,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:17:01,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:01,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247587105] [2024-11-14 04:17:01,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247587105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:01,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538022947] [2024-11-14 04:17:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:01,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:01,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:01,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:01,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:17:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:02,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:17:02,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:17:02,445 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538022947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:02,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:02,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 04:17:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425078071] [2024-11-14 04:17:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:02,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:17:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:17:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:17:02,447 INFO L87 Difference]: Start difference. First operand 1363 states and 2174 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-14 04:17:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:02,727 INFO L93 Difference]: Finished difference Result 2744 states and 4421 transitions. [2024-11-14 04:17:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:17:02,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2024-11-14 04:17:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:02,738 INFO L225 Difference]: With dead ends: 2744 [2024-11-14 04:17:02,738 INFO L226 Difference]: Without dead ends: 1393 [2024-11-14 04:17:02,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 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 04:17:02,751 INFO L432 NwaCegarLoop]: 602 mSDtfsCounter, 17 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:02,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1168 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:17:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2024-11-14 04:17:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1391. [2024-11-14 04:17:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 960 states have (on average 1.559375) internal successors, (1497), 1019 states have internal predecessors, (1497), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (370), 323 states have call predecessors, (370), 339 states have call successors, (370) [2024-11-14 04:17:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2210 transitions. [2024-11-14 04:17:02,880 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2210 transitions. Word has length 89 [2024-11-14 04:17:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:02,880 INFO L471 AbstractCegarLoop]: Abstraction has 1391 states and 2210 transitions. [2024-11-14 04:17:02,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-14 04:17:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2210 transitions. [2024-11-14 04:17:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 04:17:02,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:02,884 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:02,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:03,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 04:17:03,085 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:03,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash 425389724, now seen corresponding path program 1 times [2024-11-14 04:17:03,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:03,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309742100] [2024-11-14 04:17:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:03,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:17:03,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309742100] [2024-11-14 04:17:03,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309742100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821338884] [2024-11-14 04:17:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:03,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:03,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:03,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:17:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:04,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:17:04,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:17:04,127 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:04,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821338884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:04,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:04,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 04:17:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143514683] [2024-11-14 04:17:04,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:04,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:17:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:17:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:17:04,129 INFO L87 Difference]: Start difference. First operand 1391 states and 2210 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:17:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:04,461 INFO L93 Difference]: Finished difference Result 3412 states and 5496 transitions. [2024-11-14 04:17:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:17:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2024-11-14 04:17:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:04,480 INFO L225 Difference]: With dead ends: 3412 [2024-11-14 04:17:04,480 INFO L226 Difference]: Without dead ends: 2033 [2024-11-14 04:17:04,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 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 04:17:04,491 INFO L432 NwaCegarLoop]: 1067 mSDtfsCounter, 564 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:04,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1572 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:17:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2024-11-14 04:17:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1988. [2024-11-14 04:17:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1376 states have (on average 1.565406976744186) internal successors, (2154), 1464 states have internal predecessors, (2154), 486 states have call successors, (486), 124 states have call predecessors, (486), 125 states have return successors, (533), 459 states have call predecessors, (533), 482 states have call successors, (533) [2024-11-14 04:17:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3173 transitions. [2024-11-14 04:17:04,643 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3173 transitions. Word has length 88 [2024-11-14 04:17:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:04,644 INFO L471 AbstractCegarLoop]: Abstraction has 1988 states and 3173 transitions. [2024-11-14 04:17:04,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:17:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3173 transitions. [2024-11-14 04:17:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-14 04:17:04,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:04,649 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:04,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:04,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:04,850 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:04,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash 785525772, now seen corresponding path program 1 times [2024-11-14 04:17:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:04,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246266494] [2024-11-14 04:17:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 04:17:05,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:05,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246266494] [2024-11-14 04:17:05,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246266494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:05,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22146662] [2024-11-14 04:17:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:05,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:05,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:05,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:05,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:17:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:05,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:17:05,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:17:05,882 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22146662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:05,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:05,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-14 04:17:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962589921] [2024-11-14 04:17:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:05,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:17:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:17:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:17:05,885 INFO L87 Difference]: Start difference. First operand 1988 states and 3173 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-14 04:17:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:07,299 INFO L93 Difference]: Finished difference Result 5291 states and 8553 transitions. [2024-11-14 04:17:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:17:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2024-11-14 04:17:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:07,333 INFO L225 Difference]: With dead ends: 5291 [2024-11-14 04:17:07,333 INFO L226 Difference]: Without dead ends: 3315 [2024-11-14 04:17:07,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:17:07,358 INFO L432 NwaCegarLoop]: 608 mSDtfsCounter, 513 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:07,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 2732 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:17:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2024-11-14 04:17:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3282. [2024-11-14 04:17:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 2263 states have (on average 1.5081749889527176) internal successors, (3413), 2412 states have internal predecessors, (3413), 803 states have call successors, (803), 220 states have call predecessors, (803), 215 states have return successors, (906), 745 states have call predecessors, (906), 797 states have call successors, (906) [2024-11-14 04:17:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 5122 transitions. [2024-11-14 04:17:07,647 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 5122 transitions. Word has length 89 [2024-11-14 04:17:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:07,648 INFO L471 AbstractCegarLoop]: Abstraction has 3282 states and 5122 transitions. [2024-11-14 04:17:07,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-14 04:17:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 5122 transitions. [2024-11-14 04:17:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-14 04:17:07,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:07,651 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:07,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:17:07,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:07,852 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:07,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1398070654, now seen corresponding path program 1 times [2024-11-14 04:17:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:07,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862300697] [2024-11-14 04:17:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:17:08,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:08,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862300697] [2024-11-14 04:17:08,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862300697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:08,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507776275] [2024-11-14 04:17:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:08,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:08,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:08,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:17:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:09,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:17:09,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:17:09,554 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507776275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:09,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:09,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2024-11-14 04:17:09,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767856448] [2024-11-14 04:17:09,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:09,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:17:09,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:17:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:17:09,557 INFO L87 Difference]: Start difference. First operand 3282 states and 5122 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-14 04:17:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:11,775 INFO L93 Difference]: Finished difference Result 6903 states and 10769 transitions. [2024-11-14 04:17:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:17:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2024-11-14 04:17:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:11,808 INFO L225 Difference]: With dead ends: 6903 [2024-11-14 04:17:11,809 INFO L226 Difference]: Without dead ends: 3633 [2024-11-14 04:17:11,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:17:11,836 INFO L432 NwaCegarLoop]: 612 mSDtfsCounter, 1078 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:11,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1950 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 04:17:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2024-11-14 04:17:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3622. [2024-11-14 04:17:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 2519 states have (on average 1.4890829694323144) internal successors, (3751), 2676 states have internal predecessors, (3751), 863 states have call successors, (863), 248 states have call predecessors, (863), 239 states have return successors, (968), 793 states have call predecessors, (968), 857 states have call successors, (968) [2024-11-14 04:17:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5582 transitions. [2024-11-14 04:17:12,144 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5582 transitions. Word has length 94 [2024-11-14 04:17:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:12,144 INFO L471 AbstractCegarLoop]: Abstraction has 3622 states and 5582 transitions. [2024-11-14 04:17:12,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-14 04:17:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5582 transitions. [2024-11-14 04:17:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-14 04:17:12,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:12,147 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:12,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:17:12,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:17:12,352 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:12,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1095405294, now seen corresponding path program 1 times [2024-11-14 04:17:12,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:12,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119066198] [2024-11-14 04:17:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:12,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:17:12,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:12,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119066198] [2024-11-14 04:17:12,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119066198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:12,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030982717] [2024-11-14 04:17:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:12,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:12,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:12,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:17:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:13,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:17:13,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:17:13,505 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030982717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:13,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:13,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-14 04:17:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94171008] [2024-11-14 04:17:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:13,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:17:13,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:17:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:17:13,508 INFO L87 Difference]: Start difference. First operand 3622 states and 5582 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-14 04:17:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:13,930 INFO L93 Difference]: Finished difference Result 6453 states and 9971 transitions. [2024-11-14 04:17:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:17:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2024-11-14 04:17:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:13,960 INFO L225 Difference]: With dead ends: 6453 [2024-11-14 04:17:13,960 INFO L226 Difference]: Without dead ends: 3672 [2024-11-14 04:17:13,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:17:13,976 INFO L432 NwaCegarLoop]: 592 mSDtfsCounter, 0 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:13,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2954 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:17:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2024-11-14 04:17:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3672. [2024-11-14 04:17:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2559 states have (on average 1.4814380617428684) internal successors, (3791), 2716 states have internal predecessors, (3791), 863 states have call successors, (863), 248 states have call predecessors, (863), 249 states have return successors, (988), 803 states have call predecessors, (988), 857 states have call successors, (988) [2024-11-14 04:17:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5642 transitions. [2024-11-14 04:17:14,270 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5642 transitions. Word has length 99 [2024-11-14 04:17:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:14,270 INFO L471 AbstractCegarLoop]: Abstraction has 3672 states and 5642 transitions. [2024-11-14 04:17:14,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-14 04:17:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5642 transitions. [2024-11-14 04:17:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 04:17:14,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:14,278 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:14,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:17:14,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:17:14,478 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:14,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2110292752, now seen corresponding path program 1 times [2024-11-14 04:17:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556408580] [2024-11-14 04:17:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:15,162 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 04:17:15,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556408580] [2024-11-14 04:17:15,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556408580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428156644] [2024-11-14 04:17:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:15,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:15,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:15,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:17:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:15,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:17:15,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:17:16,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 04:17:16,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428156644] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:16,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:17:16,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2024-11-14 04:17:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796343535] [2024-11-14 04:17:16,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:16,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:17:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:17:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:17:16,419 INFO L87 Difference]: Start difference. First operand 3672 states and 5642 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-14 04:17:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:21,039 INFO L93 Difference]: Finished difference Result 9646 states and 15326 transitions. [2024-11-14 04:17:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 04:17:21,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2024-11-14 04:17:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:21,095 INFO L225 Difference]: With dead ends: 9646 [2024-11-14 04:17:21,095 INFO L226 Difference]: Without dead ends: 7181 [2024-11-14 04:17:21,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 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 04:17:21,110 INFO L432 NwaCegarLoop]: 639 mSDtfsCounter, 1908 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:21,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 3116 Invalid, 3072 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [847 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 04:17:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7181 states. [2024-11-14 04:17:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7181 to 7064. [2024-11-14 04:17:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 5022 states have (on average 1.4900438072481084) internal successors, (7483), 5280 states have internal predecessors, (7483), 1527 states have call successors, (1527), 484 states have call predecessors, (1527), 514 states have return successors, (2020), 1443 states have call predecessors, (2020), 1519 states have call successors, (2020) [2024-11-14 04:17:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 11030 transitions. [2024-11-14 04:17:21,741 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 11030 transitions. Word has length 103 [2024-11-14 04:17:21,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:21,741 INFO L471 AbstractCegarLoop]: Abstraction has 7064 states and 11030 transitions. [2024-11-14 04:17:21,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-14 04:17:21,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 11030 transitions. [2024-11-14 04:17:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-14 04:17:21,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:21,750 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:21,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:17:21,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:17:21,951 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:21,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1392970493, now seen corresponding path program 1 times [2024-11-14 04:17:21,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:21,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842499833] [2024-11-14 04:17:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:22,531 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 04:17:22,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:22,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842499833] [2024-11-14 04:17:22,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842499833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:22,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332488969] [2024-11-14 04:17:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:22,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:22,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:22,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:22,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:17:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:23,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:17:23,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:17:23,253 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:23,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332488969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:23,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:23,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-14 04:17:23,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645127719] [2024-11-14 04:17:23,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:23,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:17:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:17:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:17:23,257 INFO L87 Difference]: Start difference. First operand 7064 states and 11030 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-14 04:17:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:24,501 INFO L93 Difference]: Finished difference Result 12935 states and 20222 transitions. [2024-11-14 04:17:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:17:24,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2024-11-14 04:17:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:24,578 INFO L225 Difference]: With dead ends: 12935 [2024-11-14 04:17:24,578 INFO L226 Difference]: Without dead ends: 7086 [2024-11-14 04:17:24,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:17:24,614 INFO L432 NwaCegarLoop]: 654 mSDtfsCounter, 424 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:24,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2356 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:17:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7086 states. [2024-11-14 04:17:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7086 to 7064. [2024-11-14 04:17:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 5022 states have (on average 1.4900438072481084) internal successors, (7483), 5280 states have internal predecessors, (7483), 1527 states have call successors, (1527), 484 states have call predecessors, (1527), 514 states have return successors, (2012), 1443 states have call predecessors, (2012), 1519 states have call successors, (2012) [2024-11-14 04:17:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 11022 transitions. [2024-11-14 04:17:25,375 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 11022 transitions. Word has length 107 [2024-11-14 04:17:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:25,375 INFO L471 AbstractCegarLoop]: Abstraction has 7064 states and 11022 transitions. [2024-11-14 04:17:25,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-14 04:17:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 11022 transitions. [2024-11-14 04:17:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 04:17:25,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:25,381 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:25,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:17:25,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:25,585 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:25,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash 980650388, now seen corresponding path program 1 times [2024-11-14 04:17:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:25,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201533716] [2024-11-14 04:17:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 04:17:26,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201533716] [2024-11-14 04:17:26,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201533716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740270418] [2024-11-14 04:17:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:26,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:26,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:26,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:17:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:26,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 04:17:26,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 04:17:27,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-14 04:17:27,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740270418] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:27,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:17:27,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 27 [2024-11-14 04:17:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42862027] [2024-11-14 04:17:27,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:27,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:17:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:27,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:17:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:17:27,752 INFO L87 Difference]: Start difference. First operand 7064 states and 11022 transitions. Second operand has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-14 04:17:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:34,020 INFO L93 Difference]: Finished difference Result 14855 states and 23792 transitions. [2024-11-14 04:17:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 04:17:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 134 [2024-11-14 04:17:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:34,129 INFO L225 Difference]: With dead ends: 14855 [2024-11-14 04:17:34,129 INFO L226 Difference]: Without dead ends: 14852 [2024-11-14 04:17:34,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 04:17:34,143 INFO L432 NwaCegarLoop]: 607 mSDtfsCounter, 3253 mSDsluCounter, 2786 mSDsCounter, 0 mSdLazyCounter, 3307 mSolverCounterSat, 1361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 4668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 3307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:34,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 3393 Invalid, 4668 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1361 Valid, 3307 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-14 04:17:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14852 states. [2024-11-14 04:17:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14852 to 13405. [2024-11-14 04:17:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13405 states, 9702 states have (on average 1.5086580086580086) internal successors, (14637), 10151 states have internal predecessors, (14637), 2719 states have call successors, (2719), 888 states have call predecessors, (2719), 983 states have return successors, (3640), 2617 states have call predecessors, (3640), 2707 states have call successors, (3640) [2024-11-14 04:17:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13405 states to 13405 states and 20996 transitions. [2024-11-14 04:17:35,729 INFO L78 Accepts]: Start accepts. Automaton has 13405 states and 20996 transitions. Word has length 134 [2024-11-14 04:17:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:35,730 INFO L471 AbstractCegarLoop]: Abstraction has 13405 states and 20996 transitions. [2024-11-14 04:17:35,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-14 04:17:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 13405 states and 20996 transitions. [2024-11-14 04:17:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 04:17:35,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:35,746 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:17:35,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:35,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:35,950 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:35,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash -849570433, now seen corresponding path program 1 times [2024-11-14 04:17:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:35,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52653269] [2024-11-14 04:17:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-14 04:17:36,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52653269] [2024-11-14 04:17:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52653269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:36,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385510742] [2024-11-14 04:17:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:36,322 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:36,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:17:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:36,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 1951 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:17:36,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 04:17:37,033 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385510742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:37,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:37,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-14 04:17:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724649146] [2024-11-14 04:17:37,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:37,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:17:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:17:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:17:37,035 INFO L87 Difference]: Start difference. First operand 13405 states and 20996 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-14 04:17:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:41,446 INFO L93 Difference]: Finished difference Result 28980 states and 46057 transitions. [2024-11-14 04:17:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:17:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) Word has length 160 [2024-11-14 04:17:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:41,571 INFO L225 Difference]: With dead ends: 28980 [2024-11-14 04:17:41,571 INFO L226 Difference]: Without dead ends: 15345 [2024-11-14 04:17:41,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:17:41,638 INFO L432 NwaCegarLoop]: 416 mSDtfsCounter, 1435 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 3996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:41,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 1802 Invalid, 3996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 3169 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-14 04:17:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15345 states. [2024-11-14 04:17:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15345 to 13395. [2024-11-14 04:17:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13395 states, 9692 states have (on average 1.508976475443665) internal successors, (14625), 10141 states have internal predecessors, (14625), 2719 states have call successors, (2719), 888 states have call predecessors, (2719), 983 states have return successors, (3640), 2617 states have call predecessors, (3640), 2707 states have call successors, (3640) [2024-11-14 04:17:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 20984 transitions. [2024-11-14 04:17:43,341 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 20984 transitions. Word has length 160 [2024-11-14 04:17:43,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:43,341 INFO L471 AbstractCegarLoop]: Abstraction has 13395 states and 20984 transitions. [2024-11-14 04:17:43,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-14 04:17:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 20984 transitions. [2024-11-14 04:17:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-14 04:17:43,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:43,357 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:17:43,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:43,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:43,558 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:43,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:43,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1158193661, now seen corresponding path program 1 times [2024-11-14 04:17:43,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:43,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538114703] [2024-11-14 04:17:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:43,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-11-14 04:17:44,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:44,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538114703] [2024-11-14 04:17:44,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538114703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:44,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718168454] [2024-11-14 04:17:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:44,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:44,509 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:44,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:17:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:45,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:17:45,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 04:17:45,396 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718168454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:45,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:45,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-14 04:17:45,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731130927] [2024-11-14 04:17:45,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:45,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:17:45,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:45,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:17:45,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:17:45,398 INFO L87 Difference]: Start difference. First operand 13395 states and 20984 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2024-11-14 04:17:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:47,086 INFO L93 Difference]: Finished difference Result 31346 states and 49865 transitions. [2024-11-14 04:17:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:17:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 167 [2024-11-14 04:17:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:47,217 INFO L225 Difference]: With dead ends: 31346 [2024-11-14 04:17:47,217 INFO L226 Difference]: Without dead ends: 17963 [2024-11-14 04:17:47,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:17:47,281 INFO L432 NwaCegarLoop]: 735 mSDtfsCounter, 492 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:47,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1314 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17963 states. [2024-11-14 04:17:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17963 to 17754. [2024-11-14 04:17:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17754 states, 12858 states have (on average 1.5101104370819722) internal successors, (19417), 13468 states have internal predecessors, (19417), 3590 states have call successors, (3590), 1168 states have call predecessors, (3590), 1305 states have return successors, (4849), 3459 states have call predecessors, (4849), 3578 states have call successors, (4849) [2024-11-14 04:17:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 27856 transitions. [2024-11-14 04:17:49,132 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 27856 transitions. Word has length 167 [2024-11-14 04:17:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:49,133 INFO L471 AbstractCegarLoop]: Abstraction has 17754 states and 27856 transitions. [2024-11-14 04:17:49,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2024-11-14 04:17:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 27856 transitions. [2024-11-14 04:17:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-14 04:17:49,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:49,165 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:49,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:17:49,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:49,370 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:49,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1452899871, now seen corresponding path program 1 times [2024-11-14 04:17:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:49,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877588059] [2024-11-14 04:17:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-14 04:17:50,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:50,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877588059] [2024-11-14 04:17:50,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877588059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:50,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010321849] [2024-11-14 04:17:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:50,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:50,171 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:50,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:17:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:50,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:17:50,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 04:17:50,916 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:17:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010321849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:50,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:17:50,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2024-11-14 04:17:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125166345] [2024-11-14 04:17:50,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:50,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:17:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:17:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:17:50,920 INFO L87 Difference]: Start difference. First operand 17754 states and 27856 transitions. Second operand has 9 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) [2024-11-14 04:17:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:54,158 INFO L93 Difference]: Finished difference Result 45166 states and 71351 transitions. [2024-11-14 04:17:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:17:54,159 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) Word has length 172 [2024-11-14 04:17:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:54,386 INFO L225 Difference]: With dead ends: 45166 [2024-11-14 04:17:54,386 INFO L226 Difference]: Without dead ends: 29256 [2024-11-14 04:17:54,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:17:54,484 INFO L432 NwaCegarLoop]: 645 mSDtfsCounter, 563 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 4287 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:54,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 4287 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:17:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29256 states. [2024-11-14 04:17:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29256 to 29154. [2024-11-14 04:17:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29154 states, 21200 states have (on average 1.517311320754717) internal successors, (32167), 22158 states have internal predecessors, (32167), 5826 states have call successors, (5826), 1930 states have call predecessors, (5826), 2127 states have return successors, (7869), 5623 states have call predecessors, (7869), 5806 states have call successors, (7869) [2024-11-14 04:17:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29154 states to 29154 states and 45862 transitions. [2024-11-14 04:17:57,469 INFO L78 Accepts]: Start accepts. Automaton has 29154 states and 45862 transitions. Word has length 172 [2024-11-14 04:17:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:57,469 INFO L471 AbstractCegarLoop]: Abstraction has 29154 states and 45862 transitions. [2024-11-14 04:17:57,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) [2024-11-14 04:17:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 29154 states and 45862 transitions. [2024-11-14 04:17:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-14 04:17:57,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:57,491 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:17:57,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:17:57,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:17:57,691 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:57,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1460872271, now seen corresponding path program 1 times [2024-11-14 04:17:57,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:57,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957977981] [2024-11-14 04:17:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-14 04:17:58,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957977981] [2024-11-14 04:17:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957977981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099142584] [2024-11-14 04:17:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:58,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:58,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:58,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569c1ad-bcbf-4259-ad66-1f9c95afedc4/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:17:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:59,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 1999 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 04:17:59,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 04:17:59,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-14 04:18:00,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099142584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:00,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101081864] [2024-11-14 04:18:00,242 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2024-11-14 04:18:00,242 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:00,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:00,253 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:00,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:21,993 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 698 for LOIs [2024-11-14 04:21:16,720 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 60 for LOIs [2024-11-14 04:21:16,729 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 698 for LOIs [2024-11-14 04:22:25,245 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 712 for LOIs [2024-11-14 04:23:11,354 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 481 for LOIs [2024-11-14 04:23:15,872 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 40 for LOIs [2024-11-14 04:23:15,886 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 19 for LOIs [2024-11-14 04:23:15,904 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2024-11-14 04:23:22,279 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2024-11-14 04:23:22,731 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 25 for LOIs [2024-11-14 04:23:22,734 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 51 for LOIs [2024-11-14 04:23:22,754 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 25 for LOIs [2024-11-14 04:23:22,757 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2024-11-14 04:23:32,029 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2024-11-14 04:23:32,634 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2024-11-14 04:23:32,965 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:23:49,387 WARN L286 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 597 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:23:56,097 WARN L286 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 597 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:24:02,246 WARN L286 SmtUtils]: Spent 5.90s 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 04:24:22,731 WARN L286 SmtUtils]: Spent 6.04s 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 04:24:29,102 WARN L286 SmtUtils]: Spent 6.07s 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 04:24:35,578 WARN L286 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 575 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:24:42,065 WARN L286 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 575 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:25:18,585 WARN L286 SmtUtils]: Spent 26.29s on a formula simplification. DAG size of input: 698 DAG size of output: 666 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:25:46,872 WARN L286 SmtUtils]: Spent 26.63s on a formula simplification. DAG size of input: 702 DAG size of output: 670 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:26:15,904 WARN L286 SmtUtils]: Spent 26.96s on a formula simplification. DAG size of input: 704 DAG size of output: 672 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:26:44,656 WARN L286 SmtUtils]: Spent 26.93s on a formula simplification. DAG size of input: 707 DAG size of output: 675 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:27:13,599 WARN L286 SmtUtils]: Spent 26.68s on a formula simplification. DAG size of input: 712 DAG size of output: 677 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:27:42,860 WARN L286 SmtUtils]: Spent 27.22s on a formula simplification. DAG size of input: 715 DAG size of output: 677 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:28:13,112 WARN L286 SmtUtils]: Spent 26.35s on a formula simplification. DAG size of input: 714 DAG size of output: 671 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:28:43,426 WARN L286 SmtUtils]: Spent 27.14s on a formula simplification. DAG size of input: 715 DAG size of output: 673 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:29:12,526 WARN L286 SmtUtils]: Spent 26.75s on a formula simplification. DAG size of input: 718 DAG size of output: 673 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:29:44,130 WARN L286 SmtUtils]: Spent 27.03s on a formula simplification. DAG size of input: 713 DAG size of output: 671 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:30:13,355 WARN L286 SmtUtils]: Spent 26.86s on a formula simplification. DAG size of input: 715 DAG size of output: 673 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:30:43,041 WARN L286 SmtUtils]: Spent 27.11s on a formula simplification. DAG size of input: 718 DAG size of output: 673 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:30:50,509 WARN L286 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 678 DAG size of output: 634 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)