./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 06:35:05,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 06:35:05,347 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 06:35:05,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 06:35:05,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 06:35:05,373 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 06:35:05,374 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 06:35:05,374 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 06:35:05,375 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 06:35:05,375 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 06:35:05,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 06:35:05,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 06:35:05,375 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 06:35:05,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 06:35:05,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 06:35:05,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 06:35:05,377 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:35:05,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 06:35:05,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:35:05,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 06:35:05,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 06:35:05,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 06:35:05,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 06:35:05,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 06:35:05,379 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1 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 -> Automizer 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 -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2024-12-02 06:35:05,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 06:35:05,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 06:35:05,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 06:35:05,601 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 06:35:05,601 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 06:35:05,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2024-12-02 06:35:08,283 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/data/48f0a5ac3/14b644bcbc45410abe927b66a23cfcde/FLAGd8b1531c8 [2024-12-02 06:35:08,595 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 06:35:08,596 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2024-12-02 06:35:08,611 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/data/48f0a5ac3/14b644bcbc45410abe927b66a23cfcde/FLAGd8b1531c8 [2024-12-02 06:35:08,879 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/data/48f0a5ac3/14b644bcbc45410abe927b66a23cfcde [2024-12-02 06:35:08,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 06:35:08,884 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 06:35:08,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 06:35:08,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 06:35:08,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 06:35:08,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:35:08" (1/1) ... [2024-12-02 06:35:08,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b15d5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:08, skipping insertion in model container [2024-12-02 06:35:08,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:35:08" (1/1) ... [2024-12-02 06:35:08,944 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 06:35:09,245 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_a6ce8ef1-090d-47fd-acee-3156de74063d/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2024-12-02 06:35:09,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 06:35:09,475 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 06:35:09,485 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2024-12-02 06:35:09,487 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [86] [2024-12-02 06:35:09,487 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [452] [2024-12-02 06:35:09,487 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [553] [2024-12-02 06:35:09,487 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [562] [2024-12-02 06:35:09,487 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [916] [2024-12-02 06:35:09,487 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1099] [2024-12-02 06:35:09,488 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1770] [2024-12-02 06:35:09,488 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1783] [2024-12-02 06:35:09,488 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1903] [2024-12-02 06:35:09,521 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_a6ce8ef1-090d-47fd-acee-3156de74063d/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2024-12-02 06:35:09,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 06:35:09,625 INFO L204 MainTranslator]: Completed translation [2024-12-02 06:35:09,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09 WrapperNode [2024-12-02 06:35:09,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 06:35:09,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 06:35:09,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 06:35:09,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 06:35:09,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,704 INFO L138 Inliner]: procedures = 91, calls = 335, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 833 [2024-12-02 06:35:09,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 06:35:09,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 06:35:09,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 06:35:09,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 06:35:09,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,724 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,751 INFO L175 MemorySlicer]: Split 81 memory accesses to 20 slices as follows [2, 4, 4, 4, 2, 4, 4, 5, 3, 3, 5, 7, 4, 4, 4, 4, 4, 6, 4, 4]. 9 percent of accesses are in the largest equivalence class. The 81 initializations are split as follows [2, 4, 4, 4, 2, 4, 4, 5, 3, 3, 5, 7, 4, 4, 4, 4, 4, 6, 4, 4]. The 0 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. [2024-12-02 06:35:09,752 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,752 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,773 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,790 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 06:35:09,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 06:35:09,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 06:35:09,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 06:35:09,813 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (1/1) ... [2024-12-02 06:35:09,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:35:09,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:09,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 06:35:09,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 06:35:09,893 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2024-12-02 06:35:09,893 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2024-12-02 06:35:09,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 06:35:09,893 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-12-02 06:35:09,893 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-12-02 06:35:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2024-12-02 06:35:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2024-12-02 06:35:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-12-02 06:35:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-12-02 06:35:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-12-02 06:35:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-12-02 06:35:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-12-02 06:35:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-12-02 06:35:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-12-02 06:35:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-12-02 06:35:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-12-02 06:35:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-12-02 06:35:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2024-12-02 06:35:09,895 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2024-12-02 06:35:09,895 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-12-02 06:35:09,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-12-02 06:35:09,895 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-12-02 06:35:09,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-12-02 06:35:09,895 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-12-02 06:35:09,896 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-12-02 06:35:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-12-02 06:35:09,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-12-02 06:35:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-12-02 06:35:09,896 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-12-02 06:35:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-12-02 06:35:09,896 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-12-02 06:35:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-12-02 06:35:09,896 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-12-02 06:35:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-12-02 06:35:09,897 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-12-02 06:35:09,897 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-12-02 06:35:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#18 [2024-12-02 06:35:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#19 [2024-12-02 06:35:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-12-02 06:35:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-12-02 06:35:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-12-02 06:35:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-12-02 06:35:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-12-02 06:35:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-12-02 06:35:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 06:35:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 06:35:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-12-02 06:35:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-12-02 06:35:10,086 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 06:35:10,088 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 06:35:11,330 INFO L? ?]: Removed 439 outVars from TransFormulas that were not future-live. [2024-12-02 06:35:11,331 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 06:35:11,353 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 06:35:11,353 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 06:35:11,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:35:11 BoogieIcfgContainer [2024-12-02 06:35:11,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 06:35:11,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 06:35:11,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 06:35:11,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 06:35:11,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:35:08" (1/3) ... [2024-12-02 06:35:11,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38399247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:35:11, skipping insertion in model container [2024-12-02 06:35:11,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:35:09" (2/3) ... [2024-12-02 06:35:11,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38399247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:35:11, skipping insertion in model container [2024-12-02 06:35:11,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:35:11" (3/3) ... [2024-12-02 06:35:11,363 INFO L128 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2024-12-02 06:35:11,378 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 06:35:11,380 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elevator_spec1_product25.cil.c that has 23 procedures, 547 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-12-02 06:35:11,454 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 06:35:11,466 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=PETRI_NET, 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;@ca27ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 06:35:11,466 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 06:35:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 547 states, 432 states have (on average 1.7083333333333333) internal successors, (738), 453 states have internal predecessors, (738), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-12-02 06:35:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 06:35:11,492 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:11,493 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 06:35:11,493 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:11,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash 959788565, now seen corresponding path program 1 times [2024-12-02 06:35:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:11,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212474887] [2024-12-02 06:35:11,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:12,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212474887] [2024-12-02 06:35:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212474887] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798361898] [2024-12-02 06:35:12,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:12,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:12,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:12,064 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:12,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 06:35:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:12,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-12-02 06:35:12,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-12-02 06:35:12,514 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:12,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798361898] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:12,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:12,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-12-02 06:35:12,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557953316] [2024-12-02 06:35:12,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:12,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 06:35:12,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:12,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 06:35:12,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:35:12,537 INFO L87 Difference]: Start difference. First operand has 547 states, 432 states have (on average 1.7083333333333333) internal successors, (738), 453 states have internal predecessors, (738), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-12-02 06:35:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:12,597 INFO L93 Difference]: Finished difference Result 568 states and 950 transitions. [2024-12-02 06:35:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 06:35:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2024-12-02 06:35:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:12,614 INFO L225 Difference]: With dead ends: 568 [2024-12-02 06:35:12,614 INFO L226 Difference]: Without dead ends: 539 [2024-12-02 06:35:12,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:35:12,619 INFO L435 NwaCegarLoop]: 911 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:12,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-12-02 06:35:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2024-12-02 06:35:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 426 states have (on average 1.7065727699530517) internal successors, (727), 445 states have internal predecessors, (727), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-12-02 06:35:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 904 transitions. [2024-12-02 06:35:12,690 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 904 transitions. Word has length 97 [2024-12-02 06:35:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:12,691 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 904 transitions. [2024-12-02 06:35:12,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-12-02 06:35:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 904 transitions. [2024-12-02 06:35:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-12-02 06:35:12,696 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:12,696 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 06:35:12,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 06:35:12,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-12-02 06:35:12,897 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:12,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash -884082736, now seen corresponding path program 1 times [2024-12-02 06:35:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505134953] [2024-12-02 06:35:12,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505134953] [2024-12-02 06:35:13,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505134953] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876189627] [2024-12-02 06:35:13,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:13,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:13,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:13,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 06:35:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:13,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:13,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:13,516 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876189627] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:13,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:13,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:13,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482923678] [2024-12-02 06:35:13,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:13,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:13,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:13,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:13,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:13,518 INFO L87 Difference]: Start difference. First operand 539 states and 904 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:13,597 INFO L93 Difference]: Finished difference Result 1069 states and 1800 transitions. [2024-12-02 06:35:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:35:13,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 98 [2024-12-02 06:35:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:13,602 INFO L225 Difference]: With dead ends: 1069 [2024-12-02 06:35:13,602 INFO L226 Difference]: Without dead ends: 539 [2024-12-02 06:35:13,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:13,606 INFO L435 NwaCegarLoop]: 892 mSDtfsCounter, 5 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:13,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2670 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-12-02 06:35:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2024-12-02 06:35:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 426 states have (on average 1.704225352112676) internal successors, (726), 445 states have internal predecessors, (726), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-12-02 06:35:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 903 transitions. [2024-12-02 06:35:13,635 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 903 transitions. Word has length 98 [2024-12-02 06:35:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:13,635 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 903 transitions. [2024-12-02 06:35:13,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 903 transitions. [2024-12-02 06:35:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-12-02 06:35:13,638 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:13,638 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 06:35:13,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 06:35:13,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:13,839 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:13,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:13,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1709930880, now seen corresponding path program 1 times [2024-12-02 06:35:13,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:13,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309606037] [2024-12-02 06:35:13,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:13,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:14,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309606037] [2024-12-02 06:35:14,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309606037] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670727053] [2024-12-02 06:35:14,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:14,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:14,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:14,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:14,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 06:35:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:14,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:14,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:14,421 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:14,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670727053] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:14,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386484260] [2024-12-02 06:35:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:14,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:14,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:14,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:14,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:14,423 INFO L87 Difference]: Start difference. First operand 539 states and 903 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:14,492 INFO L93 Difference]: Finished difference Result 1069 states and 1798 transitions. [2024-12-02 06:35:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:35:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 100 [2024-12-02 06:35:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:14,498 INFO L225 Difference]: With dead ends: 1069 [2024-12-02 06:35:14,498 INFO L226 Difference]: Without dead ends: 539 [2024-12-02 06:35:14,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:14,501 INFO L435 NwaCegarLoop]: 892 mSDtfsCounter, 4 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:14,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2670 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-12-02 06:35:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2024-12-02 06:35:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 426 states have (on average 1.7018779342723005) internal successors, (725), 445 states have internal predecessors, (725), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-12-02 06:35:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 902 transitions. [2024-12-02 06:35:14,528 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 902 transitions. Word has length 100 [2024-12-02 06:35:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:14,528 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 902 transitions. [2024-12-02 06:35:14,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 902 transitions. [2024-12-02 06:35:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-12-02 06:35:14,532 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:14,532 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 06:35:14,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 06:35:14,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:14,733 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:14,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2106377328, now seen corresponding path program 1 times [2024-12-02 06:35:14,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:14,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313931275] [2024-12-02 06:35:14,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:14,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313931275] [2024-12-02 06:35:14,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313931275] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533576862] [2024-12-02 06:35:14,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:14,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:14,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 06:35:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:15,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:15,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:15,275 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533576862] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:15,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:15,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882274557] [2024-12-02 06:35:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:15,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:15,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:15,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:15,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:15,277 INFO L87 Difference]: Start difference. First operand 539 states and 902 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:15,372 INFO L93 Difference]: Finished difference Result 1076 states and 1805 transitions. [2024-12-02 06:35:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2024-12-02 06:35:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:15,378 INFO L225 Difference]: With dead ends: 1076 [2024-12-02 06:35:15,378 INFO L226 Difference]: Without dead ends: 548 [2024-12-02 06:35:15,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:15,382 INFO L435 NwaCegarLoop]: 891 mSDtfsCounter, 13 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:15,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2667 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-12-02 06:35:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2024-12-02 06:35:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 434 states have (on average 1.6981566820276497) internal successors, (737), 453 states have internal predecessors, (737), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-12-02 06:35:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 914 transitions. [2024-12-02 06:35:15,416 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 914 transitions. Word has length 102 [2024-12-02 06:35:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:15,416 INFO L471 AbstractCegarLoop]: Abstraction has 548 states and 914 transitions. [2024-12-02 06:35:15,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 914 transitions. [2024-12-02 06:35:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-12-02 06:35:15,420 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:15,420 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:15,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 06:35:15,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:15,621 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:15,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1214168713, now seen corresponding path program 1 times [2024-12-02 06:35:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:15,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402639779] [2024-12-02 06:35:15,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:15,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:15,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402639779] [2024-12-02 06:35:15,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402639779] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156930930] [2024-12-02 06:35:15,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:15,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:15,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:15,762 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:15,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 06:35:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:16,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:16,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:16,147 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156930930] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:16,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:16,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366841285] [2024-12-02 06:35:16,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:16,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:16,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:16,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:16,149 INFO L87 Difference]: Start difference. First operand 548 states and 914 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:16,223 INFO L93 Difference]: Finished difference Result 1078 states and 1806 transitions. [2024-12-02 06:35:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2024-12-02 06:35:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:16,228 INFO L225 Difference]: With dead ends: 1078 [2024-12-02 06:35:16,228 INFO L226 Difference]: Without dead ends: 548 [2024-12-02 06:35:16,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:16,232 INFO L435 NwaCegarLoop]: 891 mSDtfsCounter, 11 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:16,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2667 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-12-02 06:35:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2024-12-02 06:35:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 434 states have (on average 1.695852534562212) internal successors, (736), 453 states have internal predecessors, (736), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-12-02 06:35:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 913 transitions. [2024-12-02 06:35:16,257 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 913 transitions. Word has length 103 [2024-12-02 06:35:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:16,257 INFO L471 AbstractCegarLoop]: Abstraction has 548 states and 913 transitions. [2024-12-02 06:35:16,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 913 transitions. [2024-12-02 06:35:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-12-02 06:35:16,261 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:16,261 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:16,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 06:35:16,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:16,462 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:16,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -917506516, now seen corresponding path program 1 times [2024-12-02 06:35:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:16,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486620965] [2024-12-02 06:35:16,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:16,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:16,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:16,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486620965] [2024-12-02 06:35:16,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486620965] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:16,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441778286] [2024-12-02 06:35:16,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:16,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:16,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:16,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:16,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 06:35:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:16,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:16,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:16,957 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:16,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441778286] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:16,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:16,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885461175] [2024-12-02 06:35:16,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:16,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:16,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:16,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:16,958 INFO L87 Difference]: Start difference. First operand 548 states and 913 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:17,034 INFO L93 Difference]: Finished difference Result 1078 states and 1805 transitions. [2024-12-02 06:35:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:17,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2024-12-02 06:35:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:17,039 INFO L225 Difference]: With dead ends: 1078 [2024-12-02 06:35:17,039 INFO L226 Difference]: Without dead ends: 548 [2024-12-02 06:35:17,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:17,042 INFO L435 NwaCegarLoop]: 891 mSDtfsCounter, 10 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:17,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2667 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-12-02 06:35:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2024-12-02 06:35:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 434 states have (on average 1.6935483870967742) internal successors, (735), 453 states have internal predecessors, (735), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-12-02 06:35:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 912 transitions. [2024-12-02 06:35:17,066 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 912 transitions. Word has length 104 [2024-12-02 06:35:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:17,066 INFO L471 AbstractCegarLoop]: Abstraction has 548 states and 912 transitions. [2024-12-02 06:35:17,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 912 transitions. [2024-12-02 06:35:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-12-02 06:35:17,069 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:17,069 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:17,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 06:35:17,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 06:35:17,270 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:17,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash -269349275, now seen corresponding path program 1 times [2024-12-02 06:35:17,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:17,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159276086] [2024-12-02 06:35:17,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159276086] [2024-12-02 06:35:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159276086] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451373711] [2024-12-02 06:35:17,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:17,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:17,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:17,404 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:17,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 06:35:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:17,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 06:35:17,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:35:17,829 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451373711] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:17,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:17,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-12-02 06:35:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107572774] [2024-12-02 06:35:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:17,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:17,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:17,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-12-02 06:35:17,831 INFO L87 Difference]: Start difference. First operand 548 states and 912 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:17,943 INFO L93 Difference]: Finished difference Result 1097 states and 1835 transitions. [2024-12-02 06:35:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:35:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 105 [2024-12-02 06:35:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:17,948 INFO L225 Difference]: With dead ends: 1097 [2024-12-02 06:35:17,948 INFO L226 Difference]: Without dead ends: 571 [2024-12-02 06:35:17,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-12-02 06:35:17,951 INFO L435 NwaCegarLoop]: 892 mSDtfsCounter, 100 mSDsluCounter, 4374 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 5266 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:17,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 5266 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2024-12-02 06:35:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 567. [2024-12-02 06:35:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 450 states have (on average 1.691111111111111) internal successors, (761), 471 states have internal predecessors, (761), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2024-12-02 06:35:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 943 transitions. [2024-12-02 06:35:17,975 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 943 transitions. Word has length 105 [2024-12-02 06:35:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:17,976 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 943 transitions. [2024-12-02 06:35:17,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 943 transitions. [2024-12-02 06:35:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-12-02 06:35:17,979 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:17,979 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:17,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 06:35:18,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 06:35:18,179 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:18,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1380787524, now seen corresponding path program 1 times [2024-12-02 06:35:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:18,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953029587] [2024-12-02 06:35:18,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:18,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:18,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953029587] [2024-12-02 06:35:18,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953029587] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942228988] [2024-12-02 06:35:18,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:18,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:18,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:18,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:18,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 06:35:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:18,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:18,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:35:18,647 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:18,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942228988] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:18,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:18,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:18,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258789601] [2024-12-02 06:35:18,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:18,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:18,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:18,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:18,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:18,648 INFO L87 Difference]: Start difference. First operand 567 states and 943 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:18,790 INFO L93 Difference]: Finished difference Result 1153 states and 1936 transitions. [2024-12-02 06:35:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:35:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2024-12-02 06:35:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:18,796 INFO L225 Difference]: With dead ends: 1153 [2024-12-02 06:35:18,796 INFO L226 Difference]: Without dead ends: 582 [2024-12-02 06:35:18,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:18,799 INFO L435 NwaCegarLoop]: 866 mSDtfsCounter, 76 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:18,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 2558 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2024-12-02 06:35:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 567. [2024-12-02 06:35:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 450 states have (on average 1.68) internal successors, (756), 471 states have internal predecessors, (756), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2024-12-02 06:35:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 938 transitions. [2024-12-02 06:35:18,823 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 938 transitions. Word has length 105 [2024-12-02 06:35:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:18,824 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 938 transitions. [2024-12-02 06:35:18,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 938 transitions. [2024-12-02 06:35:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-12-02 06:35:18,827 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:18,827 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:18,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 06:35:19,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-12-02 06:35:19,027 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:19,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1742109988, now seen corresponding path program 1 times [2024-12-02 06:35:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:19,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425913451] [2024-12-02 06:35:19,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 06:35:19,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:19,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425913451] [2024-12-02 06:35:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425913451] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:19,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133371981] [2024-12-02 06:35:19,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:19,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:19,126 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:19,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 06:35:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:19,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:19,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:35:19,450 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:19,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133371981] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:19,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:19,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:19,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16263598] [2024-12-02 06:35:19,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:19,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:19,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:19,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:19,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:19,452 INFO L87 Difference]: Start difference. First operand 567 states and 938 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:19,584 INFO L93 Difference]: Finished difference Result 1153 states and 1926 transitions. [2024-12-02 06:35:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:35:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2024-12-02 06:35:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:19,590 INFO L225 Difference]: With dead ends: 1153 [2024-12-02 06:35:19,590 INFO L226 Difference]: Without dead ends: 582 [2024-12-02 06:35:19,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:19,593 INFO L435 NwaCegarLoop]: 866 mSDtfsCounter, 75 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:19,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 2558 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2024-12-02 06:35:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 567. [2024-12-02 06:35:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 450 states have (on average 1.6688888888888889) internal successors, (751), 471 states have internal predecessors, (751), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2024-12-02 06:35:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 933 transitions. [2024-12-02 06:35:19,617 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 933 transitions. Word has length 107 [2024-12-02 06:35:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:19,617 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 933 transitions. [2024-12-02 06:35:19,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 933 transitions. [2024-12-02 06:35:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-12-02 06:35:19,620 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:19,620 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:19,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-12-02 06:35:19,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:19,820 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:19,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -808891356, now seen corresponding path program 1 times [2024-12-02 06:35:19,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:19,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975831604] [2024-12-02 06:35:19,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 06:35:19,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975831604] [2024-12-02 06:35:19,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975831604] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881797895] [2024-12-02 06:35:19,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:19,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:19,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:19,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 06:35:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:20,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:20,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:35:20,296 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:20,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881797895] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:20,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:20,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:20,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9065205] [2024-12-02 06:35:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:20,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:20,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:20,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:20,297 INFO L87 Difference]: Start difference. First operand 567 states and 933 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:20,479 INFO L93 Difference]: Finished difference Result 1204 states and 1998 transitions. [2024-12-02 06:35:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2024-12-02 06:35:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:20,486 INFO L225 Difference]: With dead ends: 1204 [2024-12-02 06:35:20,487 INFO L226 Difference]: Without dead ends: 663 [2024-12-02 06:35:20,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:20,490 INFO L435 NwaCegarLoop]: 899 mSDtfsCounter, 130 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 2589 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:20,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 2589 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2024-12-02 06:35:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 618. [2024-12-02 06:35:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 500 states have (on average 1.672) internal successors, (836), 521 states have internal predecessors, (836), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2024-12-02 06:35:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1017 transitions. [2024-12-02 06:35:20,521 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1017 transitions. Word has length 109 [2024-12-02 06:35:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:20,521 INFO L471 AbstractCegarLoop]: Abstraction has 618 states and 1017 transitions. [2024-12-02 06:35:20,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1017 transitions. [2024-12-02 06:35:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-12-02 06:35:20,525 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:20,525 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 06:35:20,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 06:35:20,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:20,726 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:20,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2117987938, now seen corresponding path program 1 times [2024-12-02 06:35:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956170865] [2024-12-02 06:35:20,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:20,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956170865] [2024-12-02 06:35:20,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956170865] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957814625] [2024-12-02 06:35:20,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:20,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:20,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:20,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:20,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 06:35:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:21,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 06:35:21,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:35:21,314 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957814625] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:21,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:21,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-12-02 06:35:21,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84640486] [2024-12-02 06:35:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:21,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 06:35:21,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:21,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 06:35:21,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-12-02 06:35:21,315 INFO L87 Difference]: Start difference. First operand 618 states and 1017 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:21,438 INFO L93 Difference]: Finished difference Result 1166 states and 1927 transitions. [2024-12-02 06:35:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 06:35:21,439 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), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 110 [2024-12-02 06:35:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:21,442 INFO L225 Difference]: With dead ends: 1166 [2024-12-02 06:35:21,443 INFO L226 Difference]: Without dead ends: 640 [2024-12-02 06:35:21,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-12-02 06:35:21,445 INFO L435 NwaCegarLoop]: 872 mSDtfsCounter, 113 mSDsluCounter, 5143 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6015 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:21,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6015 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2024-12-02 06:35:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 618. [2024-12-02 06:35:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 500 states have (on average 1.672) internal successors, (836), 521 states have internal predecessors, (836), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2024-12-02 06:35:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1017 transitions. [2024-12-02 06:35:21,461 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1017 transitions. Word has length 110 [2024-12-02 06:35:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:21,461 INFO L471 AbstractCegarLoop]: Abstraction has 618 states and 1017 transitions. [2024-12-02 06:35:21,461 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), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1017 transitions. [2024-12-02 06:35:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-12-02 06:35:21,463 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:21,463 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:21,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 06:35:21,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:21,664 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:21,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash 156907646, now seen corresponding path program 1 times [2024-12-02 06:35:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:21,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423059514] [2024-12-02 06:35:21,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 06:35:21,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:21,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423059514] [2024-12-02 06:35:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423059514] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:21,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583986224] [2024-12-02 06:35:21,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:21,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:21,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:21,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:21,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 06:35:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:22,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:22,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:35:22,076 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:22,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583986224] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:22,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:22,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364447739] [2024-12-02 06:35:22,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:22,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:22,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:22,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:22,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:22,078 INFO L87 Difference]: Start difference. First operand 618 states and 1017 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:22,245 INFO L93 Difference]: Finished difference Result 1207 states and 1999 transitions. [2024-12-02 06:35:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:22,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2024-12-02 06:35:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:22,250 INFO L225 Difference]: With dead ends: 1207 [2024-12-02 06:35:22,250 INFO L226 Difference]: Without dead ends: 651 [2024-12-02 06:35:22,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:22,252 INFO L435 NwaCegarLoop]: 898 mSDtfsCounter, 124 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:22,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 2562 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2024-12-02 06:35:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 618. [2024-12-02 06:35:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 500 states have (on average 1.662) internal successors, (831), 521 states have internal predecessors, (831), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2024-12-02 06:35:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1012 transitions. [2024-12-02 06:35:22,267 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1012 transitions. Word has length 110 [2024-12-02 06:35:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:22,268 INFO L471 AbstractCegarLoop]: Abstraction has 618 states and 1012 transitions. [2024-12-02 06:35:22,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1012 transitions. [2024-12-02 06:35:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-12-02 06:35:22,270 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:22,271 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 06:35:22,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 06:35:22,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:22,471 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:22,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1735224863, now seen corresponding path program 1 times [2024-12-02 06:35:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:22,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866551755] [2024-12-02 06:35:22,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:22,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:22,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866551755] [2024-12-02 06:35:22,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866551755] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:22,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727969635] [2024-12-02 06:35:22,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:22,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:22,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:22,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 06:35:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:22,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 06:35:22,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:22,933 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:22,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727969635] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:22,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:22,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-12-02 06:35:22,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000453850] [2024-12-02 06:35:22,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:22,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:22,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:22,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:22,934 INFO L87 Difference]: Start difference. First operand 618 states and 1012 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:23,008 INFO L93 Difference]: Finished difference Result 1101 states and 1819 transitions. [2024-12-02 06:35:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:35:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 110 [2024-12-02 06:35:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:23,013 INFO L225 Difference]: With dead ends: 1101 [2024-12-02 06:35:23,013 INFO L226 Difference]: Without dead ends: 642 [2024-12-02 06:35:23,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:23,015 INFO L435 NwaCegarLoop]: 885 mSDtfsCounter, 86 mSDsluCounter, 4346 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5231 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:23,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 5231 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-12-02 06:35:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 637. [2024-12-02 06:35:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 516 states have (on average 1.6608527131782946) internal successors, (857), 539 states have internal predecessors, (857), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2024-12-02 06:35:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1042 transitions. [2024-12-02 06:35:23,048 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1042 transitions. Word has length 110 [2024-12-02 06:35:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:23,048 INFO L471 AbstractCegarLoop]: Abstraction has 637 states and 1042 transitions. [2024-12-02 06:35:23,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1042 transitions. [2024-12-02 06:35:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-12-02 06:35:23,052 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:23,052 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:23,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 06:35:23,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:23,253 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:23,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash 231730200, now seen corresponding path program 1 times [2024-12-02 06:35:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147135474] [2024-12-02 06:35:23,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:23,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:23,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147135474] [2024-12-02 06:35:23,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147135474] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:23,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472181965] [2024-12-02 06:35:23,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:23,342 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:23,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 06:35:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:23,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 06:35:23,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:23,694 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472181965] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:23,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:23,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-12-02 06:35:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807173691] [2024-12-02 06:35:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:23,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:23,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:23,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:23,696 INFO L87 Difference]: Start difference. First operand 637 states and 1042 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:23,779 INFO L93 Difference]: Finished difference Result 1131 states and 1870 transitions. [2024-12-02 06:35:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:35:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2024-12-02 06:35:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:23,783 INFO L225 Difference]: With dead ends: 1131 [2024-12-02 06:35:23,783 INFO L226 Difference]: Without dead ends: 672 [2024-12-02 06:35:23,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:23,785 INFO L435 NwaCegarLoop]: 885 mSDtfsCounter, 95 mSDsluCounter, 4336 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:23,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 5221 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2024-12-02 06:35:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 637. [2024-12-02 06:35:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 516 states have (on average 1.6608527131782946) internal successors, (857), 539 states have internal predecessors, (857), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2024-12-02 06:35:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1042 transitions. [2024-12-02 06:35:23,802 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1042 transitions. Word has length 111 [2024-12-02 06:35:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:23,802 INFO L471 AbstractCegarLoop]: Abstraction has 637 states and 1042 transitions. [2024-12-02 06:35:23,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1042 transitions. [2024-12-02 06:35:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-12-02 06:35:23,805 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:23,805 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:23,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 06:35:24,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 06:35:24,006 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:24,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:24,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1106182040, now seen corresponding path program 1 times [2024-12-02 06:35:24,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557917944] [2024-12-02 06:35:24,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-12-02 06:35:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557917944] [2024-12-02 06:35:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557917944] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716228713] [2024-12-02 06:35:24,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:24,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:24,093 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:24,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 06:35:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:24,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 06:35:24,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:24,457 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:24,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716228713] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:24,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:24,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-12-02 06:35:24,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625616087] [2024-12-02 06:35:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:24,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 06:35:24,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:24,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 06:35:24,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:24,459 INFO L87 Difference]: Start difference. First operand 637 states and 1042 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:24,576 INFO L93 Difference]: Finished difference Result 1116 states and 1844 transitions. [2024-12-02 06:35:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 06:35:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2024-12-02 06:35:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:24,580 INFO L225 Difference]: With dead ends: 1116 [2024-12-02 06:35:24,580 INFO L226 Difference]: Without dead ends: 657 [2024-12-02 06:35:24,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-12-02 06:35:24,582 INFO L435 NwaCegarLoop]: 874 mSDtfsCounter, 113 mSDsluCounter, 5149 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6023 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:24,582 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6023 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2024-12-02 06:35:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 637. [2024-12-02 06:35:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 516 states have (on average 1.6608527131782946) internal successors, (857), 539 states have internal predecessors, (857), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2024-12-02 06:35:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1042 transitions. [2024-12-02 06:35:24,597 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1042 transitions. Word has length 111 [2024-12-02 06:35:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:24,597 INFO L471 AbstractCegarLoop]: Abstraction has 637 states and 1042 transitions. [2024-12-02 06:35:24,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1042 transitions. [2024-12-02 06:35:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-12-02 06:35:24,600 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:24,600 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:24,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 06:35:24,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:24,800 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:24,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 640860680, now seen corresponding path program 1 times [2024-12-02 06:35:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:24,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046163494] [2024-12-02 06:35:24,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:24,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046163494] [2024-12-02 06:35:24,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046163494] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126755931] [2024-12-02 06:35:24,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:24,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:24,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:24,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:24,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 06:35:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:25,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:25,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 06:35:25,218 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:25,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126755931] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:25,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:25,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:25,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111995671] [2024-12-02 06:35:25,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:25,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:25,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:25,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:25,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:25,219 INFO L87 Difference]: Start difference. First operand 637 states and 1042 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:25,257 INFO L93 Difference]: Finished difference Result 1168 states and 1929 transitions. [2024-12-02 06:35:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2024-12-02 06:35:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:25,261 INFO L225 Difference]: With dead ends: 1168 [2024-12-02 06:35:25,261 INFO L226 Difference]: Without dead ends: 637 [2024-12-02 06:35:25,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:25,263 INFO L435 NwaCegarLoop]: 880 mSDtfsCounter, 13 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:25,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2636 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2024-12-02 06:35:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2024-12-02 06:35:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 516 states have (on average 1.6531007751937985) internal successors, (853), 539 states have internal predecessors, (853), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2024-12-02 06:35:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1038 transitions. [2024-12-02 06:35:25,276 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1038 transitions. Word has length 111 [2024-12-02 06:35:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:25,276 INFO L471 AbstractCegarLoop]: Abstraction has 637 states and 1038 transitions. [2024-12-02 06:35:25,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1038 transitions. [2024-12-02 06:35:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-12-02 06:35:25,278 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:25,278 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:25,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 06:35:25,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 06:35:25,479 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:25,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1643103527, now seen corresponding path program 1 times [2024-12-02 06:35:25,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:25,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353219988] [2024-12-02 06:35:25,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-12-02 06:35:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353219988] [2024-12-02 06:35:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353219988] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931233699] [2024-12-02 06:35:25,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:25,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:25,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:25,545 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:25,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 06:35:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:25,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 06:35:25,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 06:35:25,855 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931233699] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:25,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:25,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:25,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663662205] [2024-12-02 06:35:25,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:25,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:25,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:25,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:25,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:25,856 INFO L87 Difference]: Start difference. First operand 637 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:25,902 INFO L93 Difference]: Finished difference Result 1212 states and 1997 transitions. [2024-12-02 06:35:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:35:25,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2024-12-02 06:35:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:25,906 INFO L225 Difference]: With dead ends: 1212 [2024-12-02 06:35:25,906 INFO L226 Difference]: Without dead ends: 661 [2024-12-02 06:35:25,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:25,909 INFO L435 NwaCegarLoop]: 874 mSDtfsCounter, 7 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:25,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2609 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2024-12-02 06:35:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2024-12-02 06:35:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 540 states have (on average 1.6314814814814815) internal successors, (881), 563 states have internal predecessors, (881), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2024-12-02 06:35:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1066 transitions. [2024-12-02 06:35:25,931 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1066 transitions. Word has length 112 [2024-12-02 06:35:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:25,931 INFO L471 AbstractCegarLoop]: Abstraction has 661 states and 1066 transitions. [2024-12-02 06:35:25,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1066 transitions. [2024-12-02 06:35:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-12-02 06:35:25,933 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:25,934 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:25,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 06:35:26,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 06:35:26,134 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:26,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1751391486, now seen corresponding path program 1 times [2024-12-02 06:35:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:26,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059120138] [2024-12-02 06:35:26,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:26,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-12-02 06:35:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059120138] [2024-12-02 06:35:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059120138] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000854723] [2024-12-02 06:35:26,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:26,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:26,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:26,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:26,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 06:35:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:26,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 06:35:26,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:26,616 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:26,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000854723] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:26,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:26,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-12-02 06:35:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071698974] [2024-12-02 06:35:26,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:26,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 06:35:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:26,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 06:35:26,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:26,617 INFO L87 Difference]: Start difference. First operand 661 states and 1066 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:26,748 INFO L93 Difference]: Finished difference Result 1146 states and 1876 transitions. [2024-12-02 06:35:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 06:35:26,749 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), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2024-12-02 06:35:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:26,753 INFO L225 Difference]: With dead ends: 1146 [2024-12-02 06:35:26,753 INFO L226 Difference]: Without dead ends: 687 [2024-12-02 06:35:26,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-12-02 06:35:26,756 INFO L435 NwaCegarLoop]: 868 mSDtfsCounter, 119 mSDsluCounter, 5111 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 5979 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:26,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 5979 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-12-02 06:35:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 661. [2024-12-02 06:35:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 540 states have (on average 1.6314814814814815) internal successors, (881), 563 states have internal predecessors, (881), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2024-12-02 06:35:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1066 transitions. [2024-12-02 06:35:26,778 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1066 transitions. Word has length 113 [2024-12-02 06:35:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:26,779 INFO L471 AbstractCegarLoop]: Abstraction has 661 states and 1066 transitions. [2024-12-02 06:35:26,779 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), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1066 transitions. [2024-12-02 06:35:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-12-02 06:35:26,781 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:26,781 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:26,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-12-02 06:35:26,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 06:35:26,982 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:26,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1906494419, now seen corresponding path program 1 times [2024-12-02 06:35:26,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:26,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022722860] [2024-12-02 06:35:26,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:26,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:27,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:27,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022722860] [2024-12-02 06:35:27,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022722860] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:27,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788472816] [2024-12-02 06:35:27,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:27,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:27,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:27,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 06:35:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:27,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:35:27,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 06:35:27,359 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:27,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788472816] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:27,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:27,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:35:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583694187] [2024-12-02 06:35:27,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:27,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:27,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:27,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:27,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:27,360 INFO L87 Difference]: Start difference. First operand 661 states and 1066 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:27,383 INFO L93 Difference]: Finished difference Result 1117 states and 1836 transitions. [2024-12-02 06:35:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:35:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2024-12-02 06:35:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:27,386 INFO L225 Difference]: With dead ends: 1117 [2024-12-02 06:35:27,386 INFO L226 Difference]: Without dead ends: 663 [2024-12-02 06:35:27,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:35:27,388 INFO L435 NwaCegarLoop]: 888 mSDtfsCounter, 0 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:27,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2658 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2024-12-02 06:35:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 663. [2024-12-02 06:35:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 542 states have (on average 1.6291512915129152) internal successors, (883), 565 states have internal predecessors, (883), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2024-12-02 06:35:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1068 transitions. [2024-12-02 06:35:27,407 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1068 transitions. Word has length 113 [2024-12-02 06:35:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:27,407 INFO L471 AbstractCegarLoop]: Abstraction has 663 states and 1068 transitions. [2024-12-02 06:35:27,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1068 transitions. [2024-12-02 06:35:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-12-02 06:35:27,409 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:27,410 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:27,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 06:35:27,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:27,610 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:27,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:27,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1446602280, now seen corresponding path program 1 times [2024-12-02 06:35:27,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:27,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242734050] [2024-12-02 06:35:27,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:27,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:27,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242734050] [2024-12-02 06:35:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242734050] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637363675] [2024-12-02 06:35:27,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:27,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:27,676 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:27,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 06:35:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:27,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 06:35:27,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 06:35:28,115 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637363675] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4] total 11 [2024-12-02 06:35:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654004646] [2024-12-02 06:35:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:28,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 06:35:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:28,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 06:35:28,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:35:28,116 INFO L87 Difference]: Start difference. First operand 663 states and 1068 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-12-02 06:35:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:31,425 INFO L93 Difference]: Finished difference Result 1814 states and 3018 transitions. [2024-12-02 06:35:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 06:35:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 116 [2024-12-02 06:35:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:31,431 INFO L225 Difference]: With dead ends: 1814 [2024-12-02 06:35:31,431 INFO L226 Difference]: Without dead ends: 1358 [2024-12-02 06:35:31,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-12-02 06:35:31,433 INFO L435 NwaCegarLoop]: 949 mSDtfsCounter, 3579 mSDsluCounter, 3084 mSDsCounter, 0 mSdLazyCounter, 5413 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3703 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 6211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 5413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:31,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3703 Valid, 4033 Invalid, 6211 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [798 Valid, 5413 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-12-02 06:35:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2024-12-02 06:35:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1339. [2024-12-02 06:35:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1063 states have (on average 1.6331138287864535) internal successors, (1736), 1110 states have internal predecessors, (1736), 218 states have call successors, (218), 44 states have call predecessors, (218), 57 states have return successors, (251), 215 states have call predecessors, (251), 213 states have call successors, (251) [2024-12-02 06:35:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2205 transitions. [2024-12-02 06:35:31,482 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2205 transitions. Word has length 116 [2024-12-02 06:35:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:31,483 INFO L471 AbstractCegarLoop]: Abstraction has 1339 states and 2205 transitions. [2024-12-02 06:35:31,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-12-02 06:35:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2205 transitions. [2024-12-02 06:35:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-12-02 06:35:31,486 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:31,486 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:31,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 06:35:31,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:31,687 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:31,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1683495301, now seen corresponding path program 1 times [2024-12-02 06:35:31,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:31,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789537289] [2024-12-02 06:35:31,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 06:35:31,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789537289] [2024-12-02 06:35:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789537289] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52074054] [2024-12-02 06:35:31,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:31,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:31,759 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:31,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 06:35:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:32,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:35:32,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 06:35:32,092 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52074054] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:32,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:32,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2024-12-02 06:35:32,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320771933] [2024-12-02 06:35:32,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:32,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:35:32,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:32,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:35:32,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:32,093 INFO L87 Difference]: Start difference. First operand 1339 states and 2205 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:32,485 INFO L93 Difference]: Finished difference Result 3332 states and 5627 transitions. [2024-12-02 06:35:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 06:35:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2024-12-02 06:35:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:32,503 INFO L225 Difference]: With dead ends: 3332 [2024-12-02 06:35:32,503 INFO L226 Difference]: Without dead ends: 2312 [2024-12-02 06:35:32,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:35:32,510 INFO L435 NwaCegarLoop]: 1385 mSDtfsCounter, 730 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 4857 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:32,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 4857 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 06:35:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2024-12-02 06:35:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2293. [2024-12-02 06:35:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 1793 states have (on average 1.641940881204685) internal successors, (2944), 1874 states have internal predecessors, (2944), 401 states have call successors, (401), 80 states have call predecessors, (401), 98 states have return successors, (472), 400 states have call predecessors, (472), 396 states have call successors, (472) [2024-12-02 06:35:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3817 transitions. [2024-12-02 06:35:32,611 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3817 transitions. Word has length 117 [2024-12-02 06:35:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:32,611 INFO L471 AbstractCegarLoop]: Abstraction has 2293 states and 3817 transitions. [2024-12-02 06:35:32,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3817 transitions. [2024-12-02 06:35:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-12-02 06:35:32,618 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:32,618 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:32,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 06:35:32,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:32,819 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:32,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash -437896360, now seen corresponding path program 1 times [2024-12-02 06:35:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:32,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122282450] [2024-12-02 06:35:32,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:32,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122282450] [2024-12-02 06:35:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122282450] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667818252] [2024-12-02 06:35:32,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:32,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:32,960 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:32,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 06:35:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:33,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 06:35:33,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 06:35:33,307 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:33,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667818252] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:33,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:33,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-12-02 06:35:33,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551932145] [2024-12-02 06:35:33,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:33,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:33,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:33,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:33,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:33,308 INFO L87 Difference]: Start difference. First operand 2293 states and 3817 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:33,409 INFO L93 Difference]: Finished difference Result 4424 states and 7415 transitions. [2024-12-02 06:35:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:35:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 119 [2024-12-02 06:35:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:33,421 INFO L225 Difference]: With dead ends: 4424 [2024-12-02 06:35:33,421 INFO L226 Difference]: Without dead ends: 2329 [2024-12-02 06:35:33,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:33,430 INFO L435 NwaCegarLoop]: 873 mSDtfsCounter, 5 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:33,430 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2608 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2024-12-02 06:35:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 2311. [2024-12-02 06:35:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1811 states have (on average 1.642186637217007) internal successors, (2974), 1892 states have internal predecessors, (2974), 401 states have call successors, (401), 80 states have call predecessors, (401), 98 states have return successors, (472), 400 states have call predecessors, (472), 396 states have call successors, (472) [2024-12-02 06:35:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3847 transitions. [2024-12-02 06:35:33,519 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3847 transitions. Word has length 119 [2024-12-02 06:35:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:33,519 INFO L471 AbstractCegarLoop]: Abstraction has 2311 states and 3847 transitions. [2024-12-02 06:35:33,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-12-02 06:35:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3847 transitions. [2024-12-02 06:35:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-12-02 06:35:33,526 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:33,527 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:33,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 06:35:33,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 06:35:33,727 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:33,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash 742127342, now seen corresponding path program 1 times [2024-12-02 06:35:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:33,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269935912] [2024-12-02 06:35:33,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:33,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:33,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:33,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269935912] [2024-12-02 06:35:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269935912] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727626060] [2024-12-02 06:35:33,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:33,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:33,878 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:33,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 06:35:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:34,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 06:35:34,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:34,263 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727626060] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:34,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:34,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-12-02 06:35:34,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889410207] [2024-12-02 06:35:34,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:34,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 06:35:34,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:34,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 06:35:34,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-12-02 06:35:34,264 INFO L87 Difference]: Start difference. First operand 2311 states and 3847 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:34,397 INFO L93 Difference]: Finished difference Result 4366 states and 7310 transitions. [2024-12-02 06:35:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 06:35:34,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2024-12-02 06:35:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:34,413 INFO L225 Difference]: With dead ends: 4366 [2024-12-02 06:35:34,413 INFO L226 Difference]: Without dead ends: 2381 [2024-12-02 06:35:34,420 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-12-02 06:35:34,421 INFO L435 NwaCegarLoop]: 868 mSDtfsCounter, 89 mSDsluCounter, 5132 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6000 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:34,421 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 6000 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2024-12-02 06:35:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2314. [2024-12-02 06:35:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 1813 states have (on average 1.640926640926641) internal successors, (2975), 1895 states have internal predecessors, (2975), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2024-12-02 06:35:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3849 transitions. [2024-12-02 06:35:34,484 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3849 transitions. Word has length 120 [2024-12-02 06:35:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:34,484 INFO L471 AbstractCegarLoop]: Abstraction has 2314 states and 3849 transitions. [2024-12-02 06:35:34,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-12-02 06:35:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3849 transitions. [2024-12-02 06:35:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-12-02 06:35:34,489 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:34,489 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:34,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 06:35:34,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 06:35:34,690 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:34,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash -296527956, now seen corresponding path program 1 times [2024-12-02 06:35:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377256296] [2024-12-02 06:35:34,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377256296] [2024-12-02 06:35:34,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377256296] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955911781] [2024-12-02 06:35:34,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:34,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:34,811 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:34,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 06:35:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:35,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:35:35,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 06:35:35,207 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:35,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955911781] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:35,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:35,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-12-02 06:35:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352243903] [2024-12-02 06:35:35,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:35,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:35:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:35,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:35:35,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:35,209 INFO L87 Difference]: Start difference. First operand 2314 states and 3849 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-12-02 06:35:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:35,569 INFO L93 Difference]: Finished difference Result 2521 states and 4197 transitions. [2024-12-02 06:35:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:35,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 120 [2024-12-02 06:35:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:35,583 INFO L225 Difference]: With dead ends: 2521 [2024-12-02 06:35:35,584 INFO L226 Difference]: Without dead ends: 2504 [2024-12-02 06:35:35,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:35,586 INFO L435 NwaCegarLoop]: 880 mSDtfsCounter, 872 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:35,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 1620 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 06:35:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2024-12-02 06:35:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2326. [2024-12-02 06:35:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1825 states have (on average 1.6367123287671232) internal successors, (2987), 1907 states have internal predecessors, (2987), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2024-12-02 06:35:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3861 transitions. [2024-12-02 06:35:35,692 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3861 transitions. Word has length 120 [2024-12-02 06:35:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:35,692 INFO L471 AbstractCegarLoop]: Abstraction has 2326 states and 3861 transitions. [2024-12-02 06:35:35,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-12-02 06:35:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3861 transitions. [2024-12-02 06:35:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-12-02 06:35:35,702 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:35,702 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:35,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-12-02 06:35:35,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 06:35:35,903 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:35,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1659801479, now seen corresponding path program 1 times [2024-12-02 06:35:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456156198] [2024-12-02 06:35:35,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 06:35:36,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:36,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456156198] [2024-12-02 06:35:36,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456156198] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:36,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030798888] [2024-12-02 06:35:36,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:36,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:36,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:36,149 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:36,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 06:35:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:36,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 06:35:36,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 06:35:36,545 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030798888] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:36,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:36,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-12-02 06:35:36,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180774476] [2024-12-02 06:35:36,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:36,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:35:36,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:36,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:35:36,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:36,546 INFO L87 Difference]: Start difference. First operand 2326 states and 3861 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2024-12-02 06:35:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:36,605 INFO L93 Difference]: Finished difference Result 2343 states and 3881 transitions. [2024-12-02 06:35:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:36,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 126 [2024-12-02 06:35:36,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:36,626 INFO L225 Difference]: With dead ends: 2343 [2024-12-02 06:35:36,626 INFO L226 Difference]: Without dead ends: 2326 [2024-12-02 06:35:36,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:35:36,629 INFO L435 NwaCegarLoop]: 887 mSDtfsCounter, 0 mSDsluCounter, 2657 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3544 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:36,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3544 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2024-12-02 06:35:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2326. [2024-12-02 06:35:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1825 states have (on average 1.6334246575342466) internal successors, (2981), 1907 states have internal predecessors, (2981), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2024-12-02 06:35:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3855 transitions. [2024-12-02 06:35:36,712 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3855 transitions. Word has length 126 [2024-12-02 06:35:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:36,713 INFO L471 AbstractCegarLoop]: Abstraction has 2326 states and 3855 transitions. [2024-12-02 06:35:36,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2024-12-02 06:35:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3855 transitions. [2024-12-02 06:35:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-12-02 06:35:36,719 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:36,719 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:36,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 06:35:36,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 06:35:36,919 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:36,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -276464823, now seen corresponding path program 1 times [2024-12-02 06:35:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:36,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063761231] [2024-12-02 06:35:36,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:36,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 06:35:37,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063761231] [2024-12-02 06:35:37,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063761231] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866306844] [2024-12-02 06:35:37,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:37,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:37,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:37,092 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:37,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 06:35:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:37,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 06:35:37,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:35:37,515 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:37,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866306844] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:37,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:37,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2024-12-02 06:35:37,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818941087] [2024-12-02 06:35:37,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:37,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:37,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:37,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:37,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:37,517 INFO L87 Difference]: Start difference. First operand 2326 states and 3855 transitions. Second operand has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2024-12-02 06:35:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:37,646 INFO L93 Difference]: Finished difference Result 4507 states and 7503 transitions. [2024-12-02 06:35:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:35:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 137 [2024-12-02 06:35:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:37,664 INFO L225 Difference]: With dead ends: 4507 [2024-12-02 06:35:37,664 INFO L226 Difference]: Without dead ends: 2406 [2024-12-02 06:35:37,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-12-02 06:35:37,674 INFO L435 NwaCegarLoop]: 878 mSDtfsCounter, 119 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 5166 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:37,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 5166 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2024-12-02 06:35:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2326. [2024-12-02 06:35:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1825 states have (on average 1.6334246575342466) internal successors, (2981), 1907 states have internal predecessors, (2981), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2024-12-02 06:35:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3855 transitions. [2024-12-02 06:35:37,769 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3855 transitions. Word has length 137 [2024-12-02 06:35:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:37,769 INFO L471 AbstractCegarLoop]: Abstraction has 2326 states and 3855 transitions. [2024-12-02 06:35:37,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2024-12-02 06:35:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3855 transitions. [2024-12-02 06:35:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-12-02 06:35:37,779 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:37,779 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:37,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 06:35:37,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 06:35:37,979 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:37,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash 960051828, now seen corresponding path program 1 times [2024-12-02 06:35:37,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:37,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485009786] [2024-12-02 06:35:37,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:37,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-12-02 06:35:38,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:38,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485009786] [2024-12-02 06:35:38,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485009786] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:38,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808340551] [2024-12-02 06:35:38,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:38,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:38,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:38,090 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:38,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 06:35:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:38,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 06:35:38,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 06:35:38,409 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808340551] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:38,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:38,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-12-02 06:35:38,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925017917] [2024-12-02 06:35:38,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:38,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:38,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:38,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:38,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:35:38,411 INFO L87 Difference]: Start difference. First operand 2326 states and 3855 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2024-12-02 06:35:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:38,504 INFO L93 Difference]: Finished difference Result 4514 states and 7512 transitions. [2024-12-02 06:35:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:38,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 137 [2024-12-02 06:35:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:38,522 INFO L225 Difference]: With dead ends: 4514 [2024-12-02 06:35:38,522 INFO L226 Difference]: Without dead ends: 2156 [2024-12-02 06:35:38,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:35:38,532 INFO L435 NwaCegarLoop]: 881 mSDtfsCounter, 7 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:38,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2636 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2024-12-02 06:35:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2156. [2024-12-02 06:35:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1670 states have (on average 1.6407185628742516) internal successors, (2740), 1746 states have internal predecessors, (2740), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2024-12-02 06:35:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3595 transitions. [2024-12-02 06:35:38,652 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3595 transitions. Word has length 137 [2024-12-02 06:35:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:38,652 INFO L471 AbstractCegarLoop]: Abstraction has 2156 states and 3595 transitions. [2024-12-02 06:35:38,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2024-12-02 06:35:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3595 transitions. [2024-12-02 06:35:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-12-02 06:35:38,660 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:38,660 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:38,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 06:35:38,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 06:35:38,861 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:38,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash -242765148, now seen corresponding path program 1 times [2024-12-02 06:35:38,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:38,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4694428] [2024-12-02 06:35:38,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:38,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 06:35:39,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4694428] [2024-12-02 06:35:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4694428] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282603076] [2024-12-02 06:35:39,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:39,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:39,005 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:39,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 06:35:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:39,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:39,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 06:35:39,373 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:39,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282603076] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:39,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:39,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-12-02 06:35:39,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352822208] [2024-12-02 06:35:39,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:39,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:39,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:39,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-12-02 06:35:39,374 INFO L87 Difference]: Start difference. First operand 2156 states and 3595 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-12-02 06:35:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:39,506 INFO L93 Difference]: Finished difference Result 4314 states and 7203 transitions. [2024-12-02 06:35:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 139 [2024-12-02 06:35:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:39,523 INFO L225 Difference]: With dead ends: 4314 [2024-12-02 06:35:39,523 INFO L226 Difference]: Without dead ends: 2189 [2024-12-02 06:35:39,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:39,533 INFO L435 NwaCegarLoop]: 864 mSDtfsCounter, 128 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:39,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2515 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2024-12-02 06:35:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2156. [2024-12-02 06:35:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1670 states have (on average 1.6401197604790418) internal successors, (2739), 1746 states have internal predecessors, (2739), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2024-12-02 06:35:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3594 transitions. [2024-12-02 06:35:39,642 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3594 transitions. Word has length 139 [2024-12-02 06:35:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:39,642 INFO L471 AbstractCegarLoop]: Abstraction has 2156 states and 3594 transitions. [2024-12-02 06:35:39,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-12-02 06:35:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3594 transitions. [2024-12-02 06:35:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-12-02 06:35:39,650 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:39,650 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:39,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 06:35:39,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 06:35:39,851 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:39,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1271871110, now seen corresponding path program 1 times [2024-12-02 06:35:39,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106140648] [2024-12-02 06:35:39,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:39,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 06:35:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106140648] [2024-12-02 06:35:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106140648] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:40,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:40,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 06:35:40,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456762911] [2024-12-02 06:35:40,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:40,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:40,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:40,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:40,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:40,023 INFO L87 Difference]: Start difference. First operand 2156 states and 3594 transitions. Second operand has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-12-02 06:35:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:40,121 INFO L93 Difference]: Finished difference Result 3071 states and 5115 transitions. [2024-12-02 06:35:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:35:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 140 [2024-12-02 06:35:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:40,136 INFO L225 Difference]: With dead ends: 3071 [2024-12-02 06:35:40,136 INFO L226 Difference]: Without dead ends: 2191 [2024-12-02 06:35:40,140 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-12-02 06:35:40,141 INFO L435 NwaCegarLoop]: 877 mSDtfsCounter, 115 mSDsluCounter, 4283 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 5160 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:40,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 5160 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2024-12-02 06:35:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2156. [2024-12-02 06:35:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1670 states have (on average 1.6401197604790418) internal successors, (2739), 1746 states have internal predecessors, (2739), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2024-12-02 06:35:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3594 transitions. [2024-12-02 06:35:40,213 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3594 transitions. Word has length 140 [2024-12-02 06:35:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:40,214 INFO L471 AbstractCegarLoop]: Abstraction has 2156 states and 3594 transitions. [2024-12-02 06:35:40,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-12-02 06:35:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3594 transitions. [2024-12-02 06:35:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-12-02 06:35:40,220 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:40,220 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:40,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-12-02 06:35:40,221 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:40,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:40,221 INFO L85 PathProgramCache]: Analyzing trace with hash -468475261, now seen corresponding path program 1 times [2024-12-02 06:35:40,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:40,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629919551] [2024-12-02 06:35:40,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:40,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 06:35:40,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:40,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629919551] [2024-12-02 06:35:40,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629919551] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:40,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:40,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 06:35:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292751953] [2024-12-02 06:35:40,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:40,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:40,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:40,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:35:40,329 INFO L87 Difference]: Start difference. First operand 2156 states and 3594 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-12-02 06:35:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:40,394 INFO L93 Difference]: Finished difference Result 3120 states and 5197 transitions. [2024-12-02 06:35:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2024-12-02 06:35:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:40,402 INFO L225 Difference]: With dead ends: 3120 [2024-12-02 06:35:40,402 INFO L226 Difference]: Without dead ends: 979 [2024-12-02 06:35:40,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:35:40,409 INFO L435 NwaCegarLoop]: 879 mSDtfsCounter, 8 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2633 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:40,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2633 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2024-12-02 06:35:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 979. [2024-12-02 06:35:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 775 states have (on average 1.632258064516129) internal successors, (1265), 808 states have internal predecessors, (1265), 162 states have call successors, (162), 42 states have call predecessors, (162), 41 states have return successors, (166), 154 states have call predecessors, (166), 157 states have call successors, (166) [2024-12-02 06:35:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1593 transitions. [2024-12-02 06:35:40,442 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1593 transitions. Word has length 140 [2024-12-02 06:35:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:40,443 INFO L471 AbstractCegarLoop]: Abstraction has 979 states and 1593 transitions. [2024-12-02 06:35:40,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-12-02 06:35:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1593 transitions. [2024-12-02 06:35:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-12-02 06:35:40,446 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:40,446 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:40,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-12-02 06:35:40,446 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:40,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1464758139, now seen corresponding path program 1 times [2024-12-02 06:35:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766074652] [2024-12-02 06:35:40,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 06:35:40,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:40,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766074652] [2024-12-02 06:35:40,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766074652] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:40,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:40,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 06:35:40,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231782058] [2024-12-02 06:35:40,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:40,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:40,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:40,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:40,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:40,614 INFO L87 Difference]: Start difference. First operand 979 states and 1593 transitions. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-12-02 06:35:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:42,850 INFO L93 Difference]: Finished difference Result 3196 states and 5344 transitions. [2024-12-02 06:35:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 06:35:42,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 141 [2024-12-02 06:35:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:42,859 INFO L225 Difference]: With dead ends: 3196 [2024-12-02 06:35:42,859 INFO L226 Difference]: Without dead ends: 2321 [2024-12-02 06:35:42,862 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-12-02 06:35:42,862 INFO L435 NwaCegarLoop]: 405 mSDtfsCounter, 2362 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 3638 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 3638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:42,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2441 Valid, 1912 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 3638 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 06:35:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2024-12-02 06:35:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 2176. [2024-12-02 06:35:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 1722 states have (on average 1.656794425087108) internal successors, (2853), 1794 states have internal predecessors, (2853), 358 states have call successors, (358), 86 states have call predecessors, (358), 95 states have return successors, (400), 345 states have call predecessors, (400), 353 states have call successors, (400) [2024-12-02 06:35:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3611 transitions. [2024-12-02 06:35:42,955 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3611 transitions. Word has length 141 [2024-12-02 06:35:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:42,956 INFO L471 AbstractCegarLoop]: Abstraction has 2176 states and 3611 transitions. [2024-12-02 06:35:42,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2024-12-02 06:35:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3611 transitions. [2024-12-02 06:35:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-12-02 06:35:42,960 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:42,960 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:42,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-12-02 06:35:42,960 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:42,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash -313878043, now seen corresponding path program 1 times [2024-12-02 06:35:42,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:42,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480199498] [2024-12-02 06:35:42,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:42,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 06:35:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480199498] [2024-12-02 06:35:43,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480199498] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:43,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:43,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:35:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748744098] [2024-12-02 06:35:43,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:43,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:35:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:43,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:35:43,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:35:43,092 INFO L87 Difference]: Start difference. First operand 2176 states and 3611 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2024-12-02 06:35:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:43,194 INFO L93 Difference]: Finished difference Result 4273 states and 7149 transitions. [2024-12-02 06:35:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:43,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 146 [2024-12-02 06:35:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:43,206 INFO L225 Difference]: With dead ends: 4273 [2024-12-02 06:35:43,207 INFO L226 Difference]: Without dead ends: 2201 [2024-12-02 06:35:43,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:35:43,228 INFO L435 NwaCegarLoop]: 846 mSDtfsCounter, 0 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3354 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:43,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3354 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2024-12-02 06:35:43,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2195. [2024-12-02 06:35:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 1737 states have (on average 1.6505469199769718) internal successors, (2867), 1808 states have internal predecessors, (2867), 357 states have call successors, (357), 86 states have call predecessors, (357), 100 states have return successors, (414), 350 states have call predecessors, (414), 352 states have call successors, (414) [2024-12-02 06:35:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3638 transitions. [2024-12-02 06:35:43,282 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3638 transitions. Word has length 146 [2024-12-02 06:35:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:43,283 INFO L471 AbstractCegarLoop]: Abstraction has 2195 states and 3638 transitions. [2024-12-02 06:35:43,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2024-12-02 06:35:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3638 transitions. [2024-12-02 06:35:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-12-02 06:35:43,285 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:43,286 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:43,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-12-02 06:35:43,286 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:43,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1918207619, now seen corresponding path program 1 times [2024-12-02 06:35:43,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:43,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464321051] [2024-12-02 06:35:43,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:43,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 06:35:43,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:43,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464321051] [2024-12-02 06:35:43,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464321051] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:43,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:43,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 06:35:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686569235] [2024-12-02 06:35:43,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:43,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 06:35:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:43,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 06:35:43,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-12-02 06:35:43,463 INFO L87 Difference]: Start difference. First operand 2195 states and 3638 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-12-02 06:35:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:45,471 INFO L93 Difference]: Finished difference Result 7094 states and 11950 transitions. [2024-12-02 06:35:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 06:35:45,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 150 [2024-12-02 06:35:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:45,487 INFO L225 Difference]: With dead ends: 7094 [2024-12-02 06:35:45,487 INFO L226 Difference]: Without dead ends: 4998 [2024-12-02 06:35:45,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:45,492 INFO L435 NwaCegarLoop]: 597 mSDtfsCounter, 2304 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 3512 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2450 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 3986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 3512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:45,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2450 Valid, 1999 Invalid, 3986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 3512 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-12-02 06:35:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2024-12-02 06:35:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 4899. [2024-12-02 06:35:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4899 states, 3838 states have (on average 1.6492965085982283) internal successors, (6330), 4001 states have internal predecessors, (6330), 836 states have call successors, (836), 192 states have call predecessors, (836), 224 states have return successors, (1025), 827 states have call predecessors, (1025), 831 states have call successors, (1025) [2024-12-02 06:35:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4899 states to 4899 states and 8191 transitions. [2024-12-02 06:35:45,706 INFO L78 Accepts]: Start accepts. Automaton has 4899 states and 8191 transitions. Word has length 150 [2024-12-02 06:35:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:45,707 INFO L471 AbstractCegarLoop]: Abstraction has 4899 states and 8191 transitions. [2024-12-02 06:35:45,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-12-02 06:35:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4899 states and 8191 transitions. [2024-12-02 06:35:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-12-02 06:35:45,710 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:45,710 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:45,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-12-02 06:35:45,710 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:45,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash 578613513, now seen corresponding path program 1 times [2024-12-02 06:35:45,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:45,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458228500] [2024-12-02 06:35:45,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:45,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 06:35:45,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:45,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458228500] [2024-12-02 06:35:45,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458228500] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:45,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879933234] [2024-12-02 06:35:45,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:45,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:45,963 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:45,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 06:35:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:46,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:46,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 06:35:46,373 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879933234] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:46,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:46,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2024-12-02 06:35:46,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007823020] [2024-12-02 06:35:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:46,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:46,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:46,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:35:46,375 INFO L87 Difference]: Start difference. First operand 4899 states and 8191 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-12-02 06:35:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:46,650 INFO L93 Difference]: Finished difference Result 9504 states and 16155 transitions. [2024-12-02 06:35:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:46,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2024-12-02 06:35:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:46,671 INFO L225 Difference]: With dead ends: 9504 [2024-12-02 06:35:46,671 INFO L226 Difference]: Without dead ends: 4957 [2024-12-02 06:35:46,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-12-02 06:35:46,683 INFO L435 NwaCegarLoop]: 917 mSDtfsCounter, 257 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:46,683 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 2454 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:35:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2024-12-02 06:35:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4903. [2024-12-02 06:35:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 3840 states have (on average 1.6346354166666666) internal successors, (6277), 4005 states have internal predecessors, (6277), 836 states have call successors, (836), 192 states have call predecessors, (836), 226 states have return successors, (1029), 827 states have call predecessors, (1029), 831 states have call successors, (1029) [2024-12-02 06:35:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 8142 transitions. [2024-12-02 06:35:46,848 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 8142 transitions. Word has length 153 [2024-12-02 06:35:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:46,848 INFO L471 AbstractCegarLoop]: Abstraction has 4903 states and 8142 transitions. [2024-12-02 06:35:46,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-12-02 06:35:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 8142 transitions. [2024-12-02 06:35:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-12-02 06:35:46,851 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:46,851 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:46,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 06:35:47,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-12-02 06:35:47,052 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:47,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 696434397, now seen corresponding path program 1 times [2024-12-02 06:35:47,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:47,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131594893] [2024-12-02 06:35:47,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 06:35:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:47,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131594893] [2024-12-02 06:35:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131594893] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:47,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290112871] [2024-12-02 06:35:47,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:47,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:47,277 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:47,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 06:35:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:47,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:35:47,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-12-02 06:35:47,622 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:47,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290112871] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:47,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:47,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2024-12-02 06:35:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843995305] [2024-12-02 06:35:47,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:47,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:35:47,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:47,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:35:47,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:35:47,623 INFO L87 Difference]: Start difference. First operand 4903 states and 8142 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-12-02 06:35:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:47,819 INFO L93 Difference]: Finished difference Result 9759 states and 16437 transitions. [2024-12-02 06:35:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:35:47,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2024-12-02 06:35:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:47,836 INFO L225 Difference]: With dead ends: 9759 [2024-12-02 06:35:47,836 INFO L226 Difference]: Without dead ends: 4953 [2024-12-02 06:35:47,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-12-02 06:35:47,847 INFO L435 NwaCegarLoop]: 824 mSDtfsCounter, 14 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:47,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2438 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4953 states. [2024-12-02 06:35:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4953 to 4953. [2024-12-02 06:35:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4953 states, 3880 states have (on average 1.6252577319587629) internal successors, (6306), 4050 states have internal predecessors, (6306), 836 states have call successors, (836), 197 states have call predecessors, (836), 236 states have return successors, (1039), 827 states have call predecessors, (1039), 831 states have call successors, (1039) [2024-12-02 06:35:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4953 states to 4953 states and 8181 transitions. [2024-12-02 06:35:47,987 INFO L78 Accepts]: Start accepts. Automaton has 4953 states and 8181 transitions. Word has length 157 [2024-12-02 06:35:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:47,988 INFO L471 AbstractCegarLoop]: Abstraction has 4953 states and 8181 transitions. [2024-12-02 06:35:47,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-12-02 06:35:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4953 states and 8181 transitions. [2024-12-02 06:35:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-12-02 06:35:47,990 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:47,990 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:48,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 06:35:48,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:48,191 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:48,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:48,191 INFO L85 PathProgramCache]: Analyzing trace with hash -263619968, now seen corresponding path program 1 times [2024-12-02 06:35:48,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:48,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635013122] [2024-12-02 06:35:48,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:48,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-12-02 06:35:48,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:48,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635013122] [2024-12-02 06:35:48,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635013122] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:48,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:48,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 06:35:48,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296042918] [2024-12-02 06:35:48,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:48,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:48,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:48,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:48,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:35:48,394 INFO L87 Difference]: Start difference. First operand 4953 states and 8181 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2024-12-02 06:35:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:50,358 INFO L93 Difference]: Finished difference Result 9524 states and 15825 transitions. [2024-12-02 06:35:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 06:35:50,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2024-12-02 06:35:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:50,393 INFO L225 Difference]: With dead ends: 9524 [2024-12-02 06:35:50,393 INFO L226 Difference]: Without dead ends: 5477 [2024-12-02 06:35:50,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-12-02 06:35:50,406 INFO L435 NwaCegarLoop]: 380 mSDtfsCounter, 2046 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2122 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:50,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2122 Valid, 1684 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 3172 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-12-02 06:35:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5477 states. [2024-12-02 06:35:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5477 to 5102. [2024-12-02 06:35:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5102 states, 3990 states have (on average 1.6160401002506266) internal successors, (6448), 4170 states have internal predecessors, (6448), 850 states have call successors, (850), 212 states have call predecessors, (850), 261 states have return successors, (1090), 841 states have call predecessors, (1090), 845 states have call successors, (1090) [2024-12-02 06:35:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 8388 transitions. [2024-12-02 06:35:50,577 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 8388 transitions. Word has length 158 [2024-12-02 06:35:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:50,578 INFO L471 AbstractCegarLoop]: Abstraction has 5102 states and 8388 transitions. [2024-12-02 06:35:50,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2024-12-02 06:35:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 8388 transitions. [2024-12-02 06:35:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-12-02 06:35:50,580 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:50,580 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:50,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-12-02 06:35:50,580 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:50,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1953830492, now seen corresponding path program 1 times [2024-12-02 06:35:50,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:50,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967480438] [2024-12-02 06:35:50,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:50,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 06:35:50,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:50,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967480438] [2024-12-02 06:35:50,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967480438] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:50,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940324257] [2024-12-02 06:35:50,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:50,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:50,719 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:50,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 06:35:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:51,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 06:35:51,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 06:35:51,064 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:51,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940324257] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:51,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:51,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-12-02 06:35:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655974355] [2024-12-02 06:35:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:51,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 06:35:51,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:51,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 06:35:51,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:51,065 INFO L87 Difference]: Start difference. First operand 5102 states and 8388 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-12-02 06:35:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:51,258 INFO L93 Difference]: Finished difference Result 10667 states and 17667 transitions. [2024-12-02 06:35:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 06:35:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2024-12-02 06:35:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:51,282 INFO L225 Difference]: With dead ends: 10667 [2024-12-02 06:35:51,283 INFO L226 Difference]: Without dead ends: 6444 [2024-12-02 06:35:51,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 06:35:51,295 INFO L435 NwaCegarLoop]: 1324 mSDtfsCounter, 745 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:51,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 2151 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:35:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6444 states. [2024-12-02 06:35:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6444 to 6111. [2024-12-02 06:35:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6111 states, 4791 states have (on average 1.6186599874765184) internal successors, (7755), 4994 states have internal predecessors, (7755), 1013 states have call successors, (1013), 255 states have call predecessors, (1013), 306 states have return successors, (1288), 1007 states have call predecessors, (1288), 1008 states have call successors, (1288) [2024-12-02 06:35:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 10056 transitions. [2024-12-02 06:35:51,500 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 10056 transitions. Word has length 163 [2024-12-02 06:35:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:51,500 INFO L471 AbstractCegarLoop]: Abstraction has 6111 states and 10056 transitions. [2024-12-02 06:35:51,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-12-02 06:35:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 10056 transitions. [2024-12-02 06:35:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-12-02 06:35:51,503 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:51,503 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:51,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 06:35:51,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:51,703 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:51,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:51,704 INFO L85 PathProgramCache]: Analyzing trace with hash 881190981, now seen corresponding path program 1 times [2024-12-02 06:35:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:51,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675320932] [2024-12-02 06:35:51,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:51,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 06:35:51,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:51,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675320932] [2024-12-02 06:35:51,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675320932] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:35:51,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406489838] [2024-12-02 06:35:51,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:51,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:51,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:35:51,954 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:35:51,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 06:35:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:52,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 06:35:52,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:35:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-12-02 06:35:52,407 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:35:52,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406489838] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:52,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:35:52,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2024-12-02 06:35:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760627753] [2024-12-02 06:35:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:52,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 06:35:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:52,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 06:35:52,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2024-12-02 06:35:52,408 INFO L87 Difference]: Start difference. First operand 6111 states and 10056 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2024-12-02 06:35:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:54,698 INFO L93 Difference]: Finished difference Result 12022 states and 19949 transitions. [2024-12-02 06:35:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 06:35:54,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 165 [2024-12-02 06:35:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:54,731 INFO L225 Difference]: With dead ends: 12022 [2024-12-02 06:35:54,731 INFO L226 Difference]: Without dead ends: 6684 [2024-12-02 06:35:54,747 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-12-02 06:35:54,748 INFO L435 NwaCegarLoop]: 504 mSDtfsCounter, 1785 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 3599 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1869 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 3948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 3599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:54,748 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1869 Valid, 2380 Invalid, 3948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 3599 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-12-02 06:35:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6684 states. [2024-12-02 06:35:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6684 to 6217. [2024-12-02 06:35:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6217 states, 4855 states have (on average 1.6142121524201853) internal successors, (7837), 5072 states have internal predecessors, (7837), 1045 states have call successors, (1045), 255 states have call predecessors, (1045), 316 states have return successors, (1418), 1035 states have call predecessors, (1418), 1040 states have call successors, (1418) [2024-12-02 06:35:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6217 states to 6217 states and 10300 transitions. [2024-12-02 06:35:54,964 INFO L78 Accepts]: Start accepts. Automaton has 6217 states and 10300 transitions. Word has length 165 [2024-12-02 06:35:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:54,964 INFO L471 AbstractCegarLoop]: Abstraction has 6217 states and 10300 transitions. [2024-12-02 06:35:54,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2024-12-02 06:35:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6217 states and 10300 transitions. [2024-12-02 06:35:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-12-02 06:35:54,966 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:54,967 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:54,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-12-02 06:35:55,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:35:55,167 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:55,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash 982102948, now seen corresponding path program 1 times [2024-12-02 06:35:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:55,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582024331] [2024-12-02 06:35:55,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:55,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-12-02 06:35:55,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:55,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582024331] [2024-12-02 06:35:55,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582024331] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:55,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 06:35:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044473979] [2024-12-02 06:35:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:55,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 06:35:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:55,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 06:35:55,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-12-02 06:35:55,409 INFO L87 Difference]: Start difference. First operand 6217 states and 10300 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 7 states have internal predecessors, (113), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2024-12-02 06:35:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:56,920 INFO L93 Difference]: Finished difference Result 12361 states and 20595 transitions. [2024-12-02 06:35:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 06:35:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 7 states have internal predecessors, (113), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) Word has length 165 [2024-12-02 06:35:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:35:56,948 INFO L225 Difference]: With dead ends: 12361 [2024-12-02 06:35:56,948 INFO L226 Difference]: Without dead ends: 6251 [2024-12-02 06:35:56,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-12-02 06:35:56,965 INFO L435 NwaCegarLoop]: 402 mSDtfsCounter, 1240 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 06:35:56,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 1713 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 06:35:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2024-12-02 06:35:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 6229. [2024-12-02 06:35:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6229 states, 4861 states have (on average 1.60604813824316) internal successors, (7807), 5084 states have internal predecessors, (7807), 1045 states have call successors, (1045), 255 states have call predecessors, (1045), 322 states have return successors, (1466), 1035 states have call predecessors, (1466), 1040 states have call successors, (1466) [2024-12-02 06:35:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6229 states to 6229 states and 10318 transitions. [2024-12-02 06:35:57,184 INFO L78 Accepts]: Start accepts. Automaton has 6229 states and 10318 transitions. Word has length 165 [2024-12-02 06:35:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:35:57,184 INFO L471 AbstractCegarLoop]: Abstraction has 6229 states and 10318 transitions. [2024-12-02 06:35:57,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 7 states have internal predecessors, (113), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2024-12-02 06:35:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6229 states and 10318 transitions. [2024-12-02 06:35:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-12-02 06:35:57,186 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:35:57,186 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:35:57,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-12-02 06:35:57,187 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:35:57,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:35:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash 250101053, now seen corresponding path program 1 times [2024-12-02 06:35:57,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:35:57,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92176569] [2024-12-02 06:35:57,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:35:57,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:35:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:35:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-12-02 06:35:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:35:57,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92176569] [2024-12-02 06:35:57,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92176569] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:35:57,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:35:57,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:35:57,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322848540] [2024-12-02 06:35:57,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:35:57,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:35:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:35:57,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:35:57,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:35:57,301 INFO L87 Difference]: Start difference. First operand 6229 states and 10318 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-12-02 06:35:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:35:59,941 INFO L93 Difference]: Finished difference Result 22093 states and 37611 transitions. [2024-12-02 06:35:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:35:59,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 164 [2024-12-02 06:35:59,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:36:00,027 INFO L225 Difference]: With dead ends: 22093 [2024-12-02 06:36:00,027 INFO L226 Difference]: Without dead ends: 15979 [2024-12-02 06:36:00,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:36:00,056 INFO L435 NwaCegarLoop]: 462 mSDtfsCounter, 2190 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 06:36:00,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2287 Valid, 1309 Invalid, 2747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 06:36:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15979 states. [2024-12-02 06:36:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15979 to 15476. [2024-12-02 06:36:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15476 states, 11630 states have (on average 1.5951848667239896) internal successors, (18552), 12314 states have internal predecessors, (18552), 3103 states have call successors, (3103), 546 states have call predecessors, (3103), 742 states have return successors, (4602), 3099 states have call predecessors, (4602), 3098 states have call successors, (4602) [2024-12-02 06:36:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15476 states to 15476 states and 26257 transitions. [2024-12-02 06:36:00,940 INFO L78 Accepts]: Start accepts. Automaton has 15476 states and 26257 transitions. Word has length 164 [2024-12-02 06:36:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:36:00,941 INFO L471 AbstractCegarLoop]: Abstraction has 15476 states and 26257 transitions. [2024-12-02 06:36:00,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-12-02 06:36:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 15476 states and 26257 transitions. [2024-12-02 06:36:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-12-02 06:36:00,946 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:36:00,946 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:36:00,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-12-02 06:36:00,946 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:36:00,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:36:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash 636861451, now seen corresponding path program 1 times [2024-12-02 06:36:00,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:36:00,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098739513] [2024-12-02 06:36:00,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:00,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:36:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-12-02 06:36:01,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:36:01,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098739513] [2024-12-02 06:36:01,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098739513] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:36:01,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:36:01,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 06:36:01,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168972292] [2024-12-02 06:36:01,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:36:01,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:36:01,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:36:01,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:36:01,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:36:01,226 INFO L87 Difference]: Start difference. First operand 15476 states and 26257 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-12-02 06:36:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:36:04,322 INFO L93 Difference]: Finished difference Result 46811 states and 80683 transitions. [2024-12-02 06:36:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:36:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 174 [2024-12-02 06:36:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:36:04,468 INFO L225 Difference]: With dead ends: 46811 [2024-12-02 06:36:04,468 INFO L226 Difference]: Without dead ends: 31439 [2024-12-02 06:36:04,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:36:04,526 INFO L435 NwaCegarLoop]: 322 mSDtfsCounter, 1851 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1926 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:36:04,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1926 Valid, 608 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 06:36:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31439 states. [2024-12-02 06:36:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31439 to 31437. [2024-12-02 06:36:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31437 states, 23644 states have (on average 1.5836998815767214) internal successors, (37445), 25084 states have internal predecessors, (37445), 6226 states have call successors, (6226), 1088 states have call predecessors, (6226), 1566 states have return successors, (10172), 6232 states have call predecessors, (10172), 6221 states have call successors, (10172) [2024-12-02 06:36:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31437 states to 31437 states and 53843 transitions. [2024-12-02 06:36:06,263 INFO L78 Accepts]: Start accepts. Automaton has 31437 states and 53843 transitions. Word has length 174 [2024-12-02 06:36:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:36:06,263 INFO L471 AbstractCegarLoop]: Abstraction has 31437 states and 53843 transitions. [2024-12-02 06:36:06,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-12-02 06:36:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31437 states and 53843 transitions. [2024-12-02 06:36:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-12-02 06:36:06,270 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:36:06,270 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:36:06,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-12-02 06:36:06,271 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:36:06,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:36:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash -573457024, now seen corresponding path program 1 times [2024-12-02 06:36:06,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:36:06,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039163559] [2024-12-02 06:36:06,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:06,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:36:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-12-02 06:36:06,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:36:06,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039163559] [2024-12-02 06:36:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039163559] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:36:06,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225545408] [2024-12-02 06:36:06,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:06,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:36:06,375 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:36:06,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 06:36:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:06,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 06:36:06,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:36:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 06:36:06,734 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:36:06,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225545408] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:36:06,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:36:06,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:36:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211230426] [2024-12-02 06:36:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:36:06,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:36:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:36:06,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:36:06,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:36:06,735 INFO L87 Difference]: Start difference. First operand 31437 states and 53843 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-12-02 06:36:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:36:08,387 INFO L93 Difference]: Finished difference Result 46532 states and 79410 transitions. [2024-12-02 06:36:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:36:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 178 [2024-12-02 06:36:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:36:08,492 INFO L225 Difference]: With dead ends: 46532 [2024-12-02 06:36:08,492 INFO L226 Difference]: Without dead ends: 15196 [2024-12-02 06:36:08,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:36:08,631 INFO L435 NwaCegarLoop]: 818 mSDtfsCounter, 15 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:36:08,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2431 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:36:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15196 states. [2024-12-02 06:36:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15196 to 15196. [2024-12-02 06:36:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15196 states, 11443 states have (on average 1.5886568207637857) internal successors, (18179), 12126 states have internal predecessors, (18179), 3010 states have call successors, (3010), 546 states have call predecessors, (3010), 742 states have return successors, (4510), 3007 states have call predecessors, (4510), 3006 states have call successors, (4510) [2024-12-02 06:36:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15196 states to 15196 states and 25699 transitions. [2024-12-02 06:36:09,425 INFO L78 Accepts]: Start accepts. Automaton has 15196 states and 25699 transitions. Word has length 178 [2024-12-02 06:36:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:36:09,426 INFO L471 AbstractCegarLoop]: Abstraction has 15196 states and 25699 transitions. [2024-12-02 06:36:09,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-12-02 06:36:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15196 states and 25699 transitions. [2024-12-02 06:36:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-12-02 06:36:09,429 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:36:09,429 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:36:09,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 06:36:09,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:09,630 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:36:09,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:36:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1732260647, now seen corresponding path program 1 times [2024-12-02 06:36:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:36:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970593412] [2024-12-02 06:36:09,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:36:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-12-02 06:36:09,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:36:09,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970593412] [2024-12-02 06:36:09,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970593412] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:36:09,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:36:09,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:36:09,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67212051] [2024-12-02 06:36:09,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:36:09,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:36:09,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:36:09,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:36:09,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:36:09,774 INFO L87 Difference]: Start difference. First operand 15196 states and 25699 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 06:36:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:36:10,404 INFO L93 Difference]: Finished difference Result 15246 states and 25763 transitions. [2024-12-02 06:36:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:36:10,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 175 [2024-12-02 06:36:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:36:10,475 INFO L225 Difference]: With dead ends: 15246 [2024-12-02 06:36:10,475 INFO L226 Difference]: Without dead ends: 15232 [2024-12-02 06:36:10,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:36:10,484 INFO L435 NwaCegarLoop]: 825 mSDtfsCounter, 0 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:36:10,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3286 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:36:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15232 states. [2024-12-02 06:36:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15232 to 15232. [2024-12-02 06:36:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15232 states, 11479 states have (on average 1.5857653105671226) internal successors, (18203), 12162 states have internal predecessors, (18203), 3010 states have call successors, (3010), 546 states have call predecessors, (3010), 742 states have return successors, (4510), 3007 states have call predecessors, (4510), 3006 states have call successors, (4510) [2024-12-02 06:36:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15232 states to 15232 states and 25723 transitions. [2024-12-02 06:36:11,174 INFO L78 Accepts]: Start accepts. Automaton has 15232 states and 25723 transitions. Word has length 175 [2024-12-02 06:36:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:36:11,175 INFO L471 AbstractCegarLoop]: Abstraction has 15232 states and 25723 transitions. [2024-12-02 06:36:11,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 06:36:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 15232 states and 25723 transitions. [2024-12-02 06:36:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-12-02 06:36:11,181 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:36:11,181 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:36:11,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-12-02 06:36:11,181 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:36:11,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:36:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1591614785, now seen corresponding path program 1 times [2024-12-02 06:36:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:36:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560948939] [2024-12-02 06:36:11,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:36:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-12-02 06:36:11,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:36:11,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560948939] [2024-12-02 06:36:11,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560948939] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:36:11,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749096341] [2024-12-02 06:36:11,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:11,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:11,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:36:11,660 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:36:11,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 06:36:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:11,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 06:36:11,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:36:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 06:36:12,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:36:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-12-02 06:36:12,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749096341] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:36:12,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:36:12,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 26 [2024-12-02 06:36:12,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374001681] [2024-12-02 06:36:12,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:36:12,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 06:36:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:36:12,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 06:36:12,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-12-02 06:36:12,759 INFO L87 Difference]: Start difference. First operand 15232 states and 25723 transitions. Second operand has 26 states, 25 states have (on average 12.16) internal successors, (304), 22 states have internal predecessors, (304), 11 states have call successors, (55), 6 states have call predecessors, (55), 15 states have return successors, (56), 14 states have call predecessors, (56), 10 states have call successors, (56) [2024-12-02 06:36:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:36:28,956 INFO L93 Difference]: Finished difference Result 85487 states and 148193 transitions. [2024-12-02 06:36:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 06:36:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 12.16) internal successors, (304), 22 states have internal predecessors, (304), 11 states have call successors, (55), 6 states have call predecessors, (55), 15 states have return successors, (56), 14 states have call predecessors, (56), 10 states have call successors, (56) Word has length 203 [2024-12-02 06:36:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:36:29,266 INFO L225 Difference]: With dead ends: 85487 [2024-12-02 06:36:29,266 INFO L226 Difference]: Without dead ends: 70377 [2024-12-02 06:36:29,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 410 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=580, Invalid=3202, Unknown=0, NotChecked=0, Total=3782 [2024-12-02 06:36:29,330 INFO L435 NwaCegarLoop]: 1478 mSDtfsCounter, 5498 mSDsluCounter, 18979 mSDsCounter, 0 mSdLazyCounter, 29540 mSolverCounterSat, 1540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5566 SdHoareTripleChecker+Valid, 20457 SdHoareTripleChecker+Invalid, 31080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1540 IncrementalHoareTripleChecker+Valid, 29540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2024-12-02 06:36:29,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5566 Valid, 20457 Invalid, 31080 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1540 Valid, 29540 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2024-12-02 06:36:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70377 states. [2024-12-02 06:36:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70377 to 69763. [2024-12-02 06:36:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69763 states, 51164 states have (on average 1.5735087170666875) internal successors, (80507), 54456 states have internal predecessors, (80507), 15369 states have call successors, (15369), 2164 states have call predecessors, (15369), 3229 states have return successors, (25265), 15558 states have call predecessors, (25265), 15365 states have call successors, (25265) [2024-12-02 06:36:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69763 states to 69763 states and 121141 transitions. [2024-12-02 06:36:33,864 INFO L78 Accepts]: Start accepts. Automaton has 69763 states and 121141 transitions. Word has length 203 [2024-12-02 06:36:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:36:33,865 INFO L471 AbstractCegarLoop]: Abstraction has 69763 states and 121141 transitions. [2024-12-02 06:36:33,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 12.16) internal successors, (304), 22 states have internal predecessors, (304), 11 states have call successors, (55), 6 states have call predecessors, (55), 15 states have return successors, (56), 14 states have call predecessors, (56), 10 states have call successors, (56) [2024-12-02 06:36:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 69763 states and 121141 transitions. [2024-12-02 06:36:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-12-02 06:36:34,091 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:36:34,091 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:36:34,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-12-02 06:36:34,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:34,291 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:36:34,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:36:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1780520738, now seen corresponding path program 1 times [2024-12-02 06:36:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:36:34,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048037175] [2024-12-02 06:36:34,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:36:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-12-02 06:36:34,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:36:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048037175] [2024-12-02 06:36:34,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048037175] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:36:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065738440] [2024-12-02 06:36:34,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:36:34,389 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:36:34,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-12-02 06:36:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:34,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 2026 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:36:34,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:36:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 06:36:34,783 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:36:34,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065738440] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:36:34,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:36:34,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:36:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637541532] [2024-12-02 06:36:34,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:36:34,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:36:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:36:34,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:36:34,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:36:34,784 INFO L87 Difference]: Start difference. First operand 69763 states and 121141 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:36:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:36:40,796 INFO L93 Difference]: Finished difference Result 140707 states and 246603 transitions. [2024-12-02 06:36:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:36:40,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 202 [2024-12-02 06:36:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:36:41,187 INFO L225 Difference]: With dead ends: 140707 [2024-12-02 06:36:41,188 INFO L226 Difference]: Without dead ends: 71087 [2024-12-02 06:36:41,478 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:36:41,478 INFO L435 NwaCegarLoop]: 810 mSDtfsCounter, 10 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:36:41,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2395 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:36:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71087 states. [2024-12-02 06:36:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71087 to 71007. [2024-12-02 06:36:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71007 states, 52218 states have (on average 1.5730399479106822) internal successors, (82141), 55564 states have internal predecessors, (82141), 15369 states have call successors, (15369), 2312 states have call predecessors, (15369), 3419 states have return successors, (25067), 15546 states have call predecessors, (25067), 15365 states have call successors, (25067) [2024-12-02 06:36:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71007 states to 71007 states and 122577 transitions. [2024-12-02 06:36:46,124 INFO L78 Accepts]: Start accepts. Automaton has 71007 states and 122577 transitions. Word has length 202 [2024-12-02 06:36:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:36:46,124 INFO L471 AbstractCegarLoop]: Abstraction has 71007 states and 122577 transitions. [2024-12-02 06:36:46,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:36:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 71007 states and 122577 transitions. [2024-12-02 06:36:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-12-02 06:36:46,146 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:36:46,146 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:36:46,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-12-02 06:36:46,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:46,347 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:36:46,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:36:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1990002061, now seen corresponding path program 1 times [2024-12-02 06:36:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:36:46,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981019589] [2024-12-02 06:36:46,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:46,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:36:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-12-02 06:36:46,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:36:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981019589] [2024-12-02 06:36:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981019589] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:36:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808086255] [2024-12-02 06:36:46,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:46,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:46,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:36:46,533 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:36:46,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-12-02 06:36:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:46,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:36:46,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:36:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-02 06:36:46,887 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:36:46,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808086255] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:36:46,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:36:46,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:36:46,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342412972] [2024-12-02 06:36:46,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:36:46,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:36:46,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:36:46,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:36:46,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:36:46,888 INFO L87 Difference]: Start difference. First operand 71007 states and 122577 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:36:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:36:51,910 INFO L93 Difference]: Finished difference Result 121974 states and 210165 transitions. [2024-12-02 06:36:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:36:51,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 205 [2024-12-02 06:36:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:36:52,420 INFO L225 Difference]: With dead ends: 121974 [2024-12-02 06:36:52,420 INFO L226 Difference]: Without dead ends: 71007 [2024-12-02 06:36:52,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:36:52,696 INFO L435 NwaCegarLoop]: 821 mSDtfsCounter, 9 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:36:52,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2447 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:36:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71007 states. [2024-12-02 06:36:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71007 to 71001. [2024-12-02 06:36:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71001 states, 52212 states have (on average 1.5730291886922547) internal successors, (82131), 55558 states have internal predecessors, (82131), 15369 states have call successors, (15369), 2312 states have call predecessors, (15369), 3419 states have return successors, (25067), 15546 states have call predecessors, (25067), 15365 states have call successors, (25067) [2024-12-02 06:36:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71001 states to 71001 states and 122567 transitions. [2024-12-02 06:36:57,200 INFO L78 Accepts]: Start accepts. Automaton has 71001 states and 122567 transitions. Word has length 205 [2024-12-02 06:36:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:36:57,201 INFO L471 AbstractCegarLoop]: Abstraction has 71001 states and 122567 transitions. [2024-12-02 06:36:57,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:36:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 71001 states and 122567 transitions. [2024-12-02 06:36:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-12-02 06:36:57,216 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:36:57,216 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:36:57,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-12-02 06:36:57,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:57,417 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:36:57,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:36:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1611289147, now seen corresponding path program 1 times [2024-12-02 06:36:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:36:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017113171] [2024-12-02 06:36:57,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:36:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-12-02 06:36:57,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:36:57,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017113171] [2024-12-02 06:36:57,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017113171] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:36:57,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208706635] [2024-12-02 06:36:57,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:36:57,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:36:57,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:36:57,488 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:36:57,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-12-02 06:36:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:36:57,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:36:57,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:36:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 06:36:57,823 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:36:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208706635] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:36:57,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:36:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 06:36:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554771076] [2024-12-02 06:36:57,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:36:57,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:36:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:36:57,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:36:57,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:36:57,825 INFO L87 Difference]: Start difference. First operand 71001 states and 122567 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:37:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:37:02,595 INFO L93 Difference]: Finished difference Result 142445 states and 249003 transitions. [2024-12-02 06:37:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:37:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 206 [2024-12-02 06:37:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:37:03,025 INFO L225 Difference]: With dead ends: 142445 [2024-12-02 06:37:03,025 INFO L226 Difference]: Without dead ends: 71253 [2024-12-02 06:37:03,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:37:03,321 INFO L435 NwaCegarLoop]: 811 mSDtfsCounter, 12 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:37:03,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2399 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:37:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71253 states. [2024-12-02 06:37:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71253 to 71157. [2024-12-02 06:37:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71157 states, 52386 states have (on average 1.5628793952582751) internal successors, (81873), 55682 states have internal predecessors, (81873), 15369 states have call successors, (15369), 2344 states have call predecessors, (15369), 3401 states have return successors, (24923), 15546 states have call predecessors, (24923), 15365 states have call successors, (24923) [2024-12-02 06:37:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71157 states to 71157 states and 122165 transitions. [2024-12-02 06:37:07,393 INFO L78 Accepts]: Start accepts. Automaton has 71157 states and 122165 transitions. Word has length 206 [2024-12-02 06:37:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:37:07,394 INFO L471 AbstractCegarLoop]: Abstraction has 71157 states and 122165 transitions. [2024-12-02 06:37:07,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:37:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 71157 states and 122165 transitions. [2024-12-02 06:37:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-12-02 06:37:07,417 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:37:07,418 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:37:07,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-12-02 06:37:07,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:37:07,618 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:37:07,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:37:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1511999258, now seen corresponding path program 1 times [2024-12-02 06:37:07,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:37:07,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82020475] [2024-12-02 06:37:07,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:37:07,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:37:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:37:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-02 06:37:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:37:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82020475] [2024-12-02 06:37:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82020475] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:37:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047630575] [2024-12-02 06:37:07,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:37:07,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:37:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:37:07,704 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:37:07,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-12-02 06:37:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:37:08,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 06:37:08,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:37:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 45 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-12-02 06:37:08,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:37:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-12-02 06:37:08,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047630575] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:37:08,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:37:08,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 8] total 16 [2024-12-02 06:37:08,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58952182] [2024-12-02 06:37:08,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:37:08,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 06:37:08,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:37:08,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 06:37:08,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-12-02 06:37:08,787 INFO L87 Difference]: Start difference. First operand 71157 states and 122165 transitions. Second operand has 16 states, 16 states have (on average 15.5625) internal successors, (249), 14 states have internal predecessors, (249), 7 states have call successors, (48), 5 states have call predecessors, (48), 11 states have return successors, (49), 9 states have call predecessors, (49), 7 states have call successors, (49) [2024-12-02 06:37:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:37:23,670 INFO L93 Difference]: Finished difference Result 238327 states and 421904 transitions. [2024-12-02 06:37:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 06:37:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.5625) internal successors, (249), 14 states have internal predecessors, (249), 7 states have call successors, (48), 5 states have call predecessors, (48), 11 states have return successors, (49), 9 states have call predecessors, (49), 7 states have call successors, (49) Word has length 209 [2024-12-02 06:37:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:37:24,633 INFO L225 Difference]: With dead ends: 238327 [2024-12-02 06:37:24,633 INFO L226 Difference]: Without dead ends: 165891 [2024-12-02 06:37:24,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2024-12-02 06:37:24,989 INFO L435 NwaCegarLoop]: 792 mSDtfsCounter, 1943 mSDsluCounter, 5646 mSDsCounter, 0 mSdLazyCounter, 9272 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 6438 SdHoareTripleChecker+Invalid, 9751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 9272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-12-02 06:37:24,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 6438 Invalid, 9751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 9272 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-12-02 06:37:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165891 states. [2024-12-02 06:37:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165891 to 164819. [2024-12-02 06:37:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164819 states, 117642 states have (on average 1.5526852654664152) internal successors, (182661), 125560 states have internal predecessors, (182661), 40013 states have call successors, (40013), 4662 states have call predecessors, (40013), 7163 states have return successors, (66837), 40772 states have call predecessors, (66837), 40009 states have call successors, (66837) [2024-12-02 06:37:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164819 states to 164819 states and 289511 transitions. [2024-12-02 06:37:38,183 INFO L78 Accepts]: Start accepts. Automaton has 164819 states and 289511 transitions. Word has length 209 [2024-12-02 06:37:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:37:38,183 INFO L471 AbstractCegarLoop]: Abstraction has 164819 states and 289511 transitions. [2024-12-02 06:37:38,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.5625) internal successors, (249), 14 states have internal predecessors, (249), 7 states have call successors, (48), 5 states have call predecessors, (48), 11 states have return successors, (49), 9 states have call predecessors, (49), 7 states have call successors, (49) [2024-12-02 06:37:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 164819 states and 289511 transitions. [2024-12-02 06:37:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-12-02 06:37:38,252 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:37:38,253 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:37:38,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-12-02 06:37:38,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:37:38,453 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:37:38,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:37:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash 813021022, now seen corresponding path program 1 times [2024-12-02 06:37:38,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:37:38,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149031289] [2024-12-02 06:37:38,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:37:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:37:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:37:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-12-02 06:37:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:37:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149031289] [2024-12-02 06:37:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149031289] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:37:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312333398] [2024-12-02 06:37:38,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:37:38,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:37:38,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:37:38,683 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:37:38,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-12-02 06:37:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:37:39,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:37:39,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:37:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-12-02 06:37:39,158 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:37:39,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312333398] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:37:39,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:37:39,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:37:39,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414853302] [2024-12-02 06:37:39,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:37:39,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:37:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:37:39,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:37:39,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:37:39,159 INFO L87 Difference]: Start difference. First operand 164819 states and 289511 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:37:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:37:53,635 INFO L93 Difference]: Finished difference Result 321321 states and 569975 transitions. [2024-12-02 06:37:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:37:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 208 [2024-12-02 06:37:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:37:54,936 INFO L225 Difference]: With dead ends: 321321 [2024-12-02 06:37:54,936 INFO L226 Difference]: Without dead ends: 167383 [2024-12-02 06:37:55,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:37:55,756 INFO L435 NwaCegarLoop]: 813 mSDtfsCounter, 8 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:37:55,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2404 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:37:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167383 states. [2024-12-02 06:38:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167383 to 167251. [2024-12-02 06:38:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167251 states, 119698 states have (on average 1.5502096943975672) internal successors, (185557), 127712 states have internal predecessors, (185557), 40013 states have call successors, (40013), 4942 states have call predecessors, (40013), 7539 states have return successors, (66837), 40772 states have call predecessors, (66837), 40009 states have call successors, (66837) [2024-12-02 06:38:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167251 states to 167251 states and 292407 transitions. [2024-12-02 06:38:10,684 INFO L78 Accepts]: Start accepts. Automaton has 167251 states and 292407 transitions. Word has length 208 [2024-12-02 06:38:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:38:10,684 INFO L471 AbstractCegarLoop]: Abstraction has 167251 states and 292407 transitions. [2024-12-02 06:38:10,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:38:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 167251 states and 292407 transitions. [2024-12-02 06:38:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-12-02 06:38:10,745 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:38:10,745 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:38:10,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-12-02 06:38:10,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-12-02 06:38:10,946 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:38:10,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:38:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash 430853814, now seen corresponding path program 1 times [2024-12-02 06:38:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:38:10,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964975954] [2024-12-02 06:38:10,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:38:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:38:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:38:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-12-02 06:38:11,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:38:11,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964975954] [2024-12-02 06:38:11,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964975954] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:38:11,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130888007] [2024-12-02 06:38:11,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:38:11,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:38:11,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:38:11,096 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:38:11,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-12-02 06:38:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:38:11,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:38:11,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:38:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-12-02 06:38:11,465 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:38:11,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130888007] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:38:11,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:38:11,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:38:11,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566483830] [2024-12-02 06:38:11,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:38:11,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:38:11,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:38:11,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:38:11,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:38:11,466 INFO L87 Difference]: Start difference. First operand 167251 states and 292407 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:38:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:38:24,327 INFO L93 Difference]: Finished difference Result 238193 states and 413735 transitions. [2024-12-02 06:38:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:38:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 210 [2024-12-02 06:38:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:38:25,786 INFO L225 Difference]: With dead ends: 238193 [2024-12-02 06:38:25,786 INFO L226 Difference]: Without dead ends: 167251 [2024-12-02 06:38:26,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:38:26,086 INFO L435 NwaCegarLoop]: 818 mSDtfsCounter, 21 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:38:26,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2421 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:38:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167251 states. [2024-12-02 06:38:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167251 to 167247. [2024-12-02 06:38:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167247 states, 119694 states have (on average 1.5501946630574632) internal successors, (185549), 127708 states have internal predecessors, (185549), 40013 states have call successors, (40013), 4942 states have call predecessors, (40013), 7539 states have return successors, (66837), 40772 states have call predecessors, (66837), 40009 states have call successors, (66837) [2024-12-02 06:38:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167247 states to 167247 states and 292399 transitions. [2024-12-02 06:38:38,322 INFO L78 Accepts]: Start accepts. Automaton has 167247 states and 292399 transitions. Word has length 210 [2024-12-02 06:38:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:38:38,322 INFO L471 AbstractCegarLoop]: Abstraction has 167247 states and 292399 transitions. [2024-12-02 06:38:38,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:38:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 167247 states and 292399 transitions. [2024-12-02 06:38:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-12-02 06:38:38,570 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:38:38,570 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:38:38,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-12-02 06:38:38,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-12-02 06:38:38,770 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:38:38,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:38:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1607824588, now seen corresponding path program 1 times [2024-12-02 06:38:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:38:38,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086077468] [2024-12-02 06:38:38,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:38:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:38:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:38:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-12-02 06:38:38,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:38:38,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086077468] [2024-12-02 06:38:38,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086077468] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:38:38,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233997966] [2024-12-02 06:38:38,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:38:38,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:38:38,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:38:38,921 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:38:38,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-12-02 06:38:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:38:39,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 06:38:39,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:38:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-12-02 06:38:39,298 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:38:39,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233997966] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:38:39,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:38:39,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:38:39,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974645523] [2024-12-02 06:38:39,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:38:39,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:38:39,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:38:39,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:38:39,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:38:39,300 INFO L87 Difference]: Start difference. First operand 167247 states and 292399 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:38:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:38:53,421 INFO L93 Difference]: Finished difference Result 238193 states and 413731 transitions. [2024-12-02 06:38:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:38:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 210 [2024-12-02 06:38:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:38:54,590 INFO L225 Difference]: With dead ends: 238193 [2024-12-02 06:38:54,590 INFO L226 Difference]: Without dead ends: 167239 [2024-12-02 06:38:54,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:38:54,964 INFO L435 NwaCegarLoop]: 826 mSDtfsCounter, 10 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:38:54,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2451 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:38:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167239 states. [2024-12-02 06:39:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167239 to 167239. [2024-12-02 06:39:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167239 states, 119686 states have (on average 1.5502147285396788) internal successors, (185539), 127700 states have internal predecessors, (185539), 40013 states have call successors, (40013), 4942 states have call predecessors, (40013), 7539 states have return successors, (66837), 40772 states have call predecessors, (66837), 40009 states have call successors, (66837) [2024-12-02 06:39:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167239 states to 167239 states and 292389 transitions. [2024-12-02 06:39:07,773 INFO L78 Accepts]: Start accepts. Automaton has 167239 states and 292389 transitions. Word has length 210 [2024-12-02 06:39:07,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:39:07,773 INFO L471 AbstractCegarLoop]: Abstraction has 167239 states and 292389 transitions. [2024-12-02 06:39:07,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-12-02 06:39:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 167239 states and 292389 transitions. [2024-12-02 06:39:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-12-02 06:39:07,855 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:39:07,856 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:39:07,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-12-02 06:39:08,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:39:08,056 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:39:08,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:39:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1895949608, now seen corresponding path program 1 times [2024-12-02 06:39:08,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:39:08,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788138723] [2024-12-02 06:39:08,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:39:08,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:39:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:39:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-12-02 06:39:08,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:39:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788138723] [2024-12-02 06:39:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788138723] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:39:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437173345] [2024-12-02 06:39:08,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:39:08,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:39:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:39:08,223 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:39:08,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-12-02 06:39:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:39:08,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:39:08,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:39:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-12-02 06:39:08,616 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:39:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437173345] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:39:08,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:39:08,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:39:08,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212638194] [2024-12-02 06:39:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:39:08,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:39:08,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:39:08,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:39:08,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:39:08,617 INFO L87 Difference]: Start difference. First operand 167239 states and 292389 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:39:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:39:23,518 INFO L93 Difference]: Finished difference Result 324397 states and 573577 transitions. [2024-12-02 06:39:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:39:23,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 209 [2024-12-02 06:39:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:39:24,701 INFO L225 Difference]: With dead ends: 324397 [2024-12-02 06:39:24,702 INFO L226 Difference]: Without dead ends: 167419 [2024-12-02 06:39:25,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:39:25,777 INFO L435 NwaCegarLoop]: 806 mSDtfsCounter, 10 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:39:25,778 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2384 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:39:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167419 states. [2024-12-02 06:39:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167419 to 167227. [2024-12-02 06:39:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167227 states, 119680 states have (on average 1.5432235962566845) internal successors, (184693), 127688 states have internal predecessors, (184693), 40013 states have call successors, (40013), 4942 states have call predecessors, (40013), 7533 states have return successors, (66805), 40772 states have call predecessors, (66805), 40009 states have call successors, (66805) [2024-12-02 06:39:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167227 states to 167227 states and 291511 transitions. [2024-12-02 06:39:39,017 INFO L78 Accepts]: Start accepts. Automaton has 167227 states and 291511 transitions. Word has length 209 [2024-12-02 06:39:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:39:39,018 INFO L471 AbstractCegarLoop]: Abstraction has 167227 states and 291511 transitions. [2024-12-02 06:39:39,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:39:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 167227 states and 291511 transitions. [2024-12-02 06:39:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-12-02 06:39:39,081 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:39:39,082 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:39:39,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-12-02 06:39:39,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:39:39,282 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:39:39,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:39:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2131211528, now seen corresponding path program 1 times [2024-12-02 06:39:39,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:39:39,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956785489] [2024-12-02 06:39:39,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:39:39,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:39:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:39:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-12-02 06:39:39,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:39:39,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956785489] [2024-12-02 06:39:39,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956785489] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:39:39,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006314883] [2024-12-02 06:39:39,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:39:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:39:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:39:39,441 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:39:39,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-12-02 06:39:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:39:39,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:39:39,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:39:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-12-02 06:39:39,839 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:39:39,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006314883] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:39:39,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:39:39,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:39:39,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099962700] [2024-12-02 06:39:39,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:39:39,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:39:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:39:39,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:39:39,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:39:39,841 INFO L87 Difference]: Start difference. First operand 167227 states and 291511 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2024-12-02 06:39:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:39:54,771 INFO L93 Difference]: Finished difference Result 326233 states and 573859 transitions. [2024-12-02 06:39:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:39:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) Word has length 211 [2024-12-02 06:39:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:39:55,937 INFO L225 Difference]: With dead ends: 326233 [2024-12-02 06:39:55,937 INFO L226 Difference]: Without dead ends: 169875 [2024-12-02 06:39:56,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:39:56,833 INFO L435 NwaCegarLoop]: 803 mSDtfsCounter, 8 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:39:56,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2375 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:39:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169875 states. [2024-12-02 06:40:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169875 to 169683. [2024-12-02 06:40:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169683 states, 121748 states have (on average 1.53859611656865) internal successors, (187321), 129864 states have internal predecessors, (187321), 40013 states have call successors, (40013), 5222 states have call predecessors, (40013), 7921 states have return successors, (66949), 40772 states have call predecessors, (66949), 40009 states have call successors, (66949) [2024-12-02 06:40:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169683 states to 169683 states and 294283 transitions. [2024-12-02 06:40:09,561 INFO L78 Accepts]: Start accepts. Automaton has 169683 states and 294283 transitions. Word has length 211 [2024-12-02 06:40:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:40:09,561 INFO L471 AbstractCegarLoop]: Abstraction has 169683 states and 294283 transitions. [2024-12-02 06:40:09,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2024-12-02 06:40:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 169683 states and 294283 transitions. [2024-12-02 06:40:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-12-02 06:40:09,932 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:40:09,933 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:40:09,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-12-02 06:40:10,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:40:10,133 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:40:10,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:40:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1671486127, now seen corresponding path program 1 times [2024-12-02 06:40:10,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:40:10,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329946138] [2024-12-02 06:40:10,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:40:10,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:40:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:40:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-12-02 06:40:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:40:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329946138] [2024-12-02 06:40:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329946138] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:40:10,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617917719] [2024-12-02 06:40:10,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:40:10,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:40:10,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:40:10,295 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:40:10,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-12-02 06:40:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:40:10,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 06:40:10,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:40:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-12-02 06:40:10,696 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:40:10,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617917719] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:40:10,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:40:10,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:40:10,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8371538] [2024-12-02 06:40:10,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:40:10,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:40:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:40:10,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:40:10,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:40:10,698 INFO L87 Difference]: Start difference. First operand 169683 states and 294283 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:40:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:40:18,574 INFO L93 Difference]: Finished difference Result 215481 states and 373381 transitions. [2024-12-02 06:40:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:40:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 212 [2024-12-02 06:40:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:40:19,326 INFO L225 Difference]: With dead ends: 215481 [2024-12-02 06:40:19,326 INFO L226 Difference]: Without dead ends: 94520 [2024-12-02 06:40:20,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:40:20,204 INFO L435 NwaCegarLoop]: 823 mSDtfsCounter, 8 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:40:20,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2450 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:40:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94520 states. [2024-12-02 06:40:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94520 to 83408. [2024-12-02 06:40:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83408 states, 59745 states have (on average 1.5443133316595532) internal successors, (92265), 63807 states have internal predecessors, (92265), 19722 states have call successors, (19722), 2613 states have call predecessors, (19722), 3940 states have return successors, (30478), 20075 states have call predecessors, (30478), 19718 states have call successors, (30478) [2024-12-02 06:40:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83408 states to 83408 states and 142465 transitions. [2024-12-02 06:40:26,726 INFO L78 Accepts]: Start accepts. Automaton has 83408 states and 142465 transitions. Word has length 212 [2024-12-02 06:40:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:40:26,726 INFO L471 AbstractCegarLoop]: Abstraction has 83408 states and 142465 transitions. [2024-12-02 06:40:26,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:40:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 83408 states and 142465 transitions. [2024-12-02 06:40:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-12-02 06:40:26,761 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:40:26,761 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:40:26,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-12-02 06:40:26,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-12-02 06:40:26,962 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:40:26,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:40:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1864166758, now seen corresponding path program 1 times [2024-12-02 06:40:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:40:26,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506625360] [2024-12-02 06:40:26,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:40:26,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:40:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:40:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-12-02 06:40:27,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:40:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506625360] [2024-12-02 06:40:27,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506625360] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:40:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511084046] [2024-12-02 06:40:27,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:40:27,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:40:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:40:27,160 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:40:27,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-12-02 06:40:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:40:27,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 2302 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 06:40:27,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:40:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-12-02 06:40:27,669 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:40:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511084046] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:40:27,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:40:27,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2024-12-02 06:40:27,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643048317] [2024-12-02 06:40:27,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:40:27,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 06:40:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:40:27,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 06:40:27,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:40:27,670 INFO L87 Difference]: Start difference. First operand 83408 states and 142465 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:40:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:40:35,762 INFO L93 Difference]: Finished difference Result 184002 states and 318806 transitions. [2024-12-02 06:40:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 06:40:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 222 [2024-12-02 06:40:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:40:36,740 INFO L225 Difference]: With dead ends: 184002 [2024-12-02 06:40:36,740 INFO L226 Difference]: Without dead ends: 111996 [2024-12-02 06:40:37,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:40:37,066 INFO L435 NwaCegarLoop]: 776 mSDtfsCounter, 771 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:40:37,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 1427 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:40:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111996 states. [2024-12-02 06:40:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111996 to 111528. [2024-12-02 06:40:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111528 states, 79779 states have (on average 1.5233958811215984) internal successors, (121535), 85155 states have internal predecessors, (121535), 26426 states have call successors, (26426), 3637 states have call predecessors, (26426), 5322 states have return successors, (42730), 26847 states have call predecessors, (42730), 26422 states have call successors, (42730) [2024-12-02 06:40:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111528 states to 111528 states and 190691 transitions. [2024-12-02 06:40:46,020 INFO L78 Accepts]: Start accepts. Automaton has 111528 states and 190691 transitions. Word has length 222 [2024-12-02 06:40:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:40:46,021 INFO L471 AbstractCegarLoop]: Abstraction has 111528 states and 190691 transitions. [2024-12-02 06:40:46,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-12-02 06:40:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 111528 states and 190691 transitions. [2024-12-02 06:40:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2024-12-02 06:40:46,058 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:40:46,059 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:40:46,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-12-02 06:40:46,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-12-02 06:40:46,259 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:40:46,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:40:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1384843186, now seen corresponding path program 1 times [2024-12-02 06:40:46,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:40:46,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939509419] [2024-12-02 06:40:46,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:40:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:40:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:40:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-12-02 06:40:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:40:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939509419] [2024-12-02 06:40:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939509419] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:40:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807409640] [2024-12-02 06:40:46,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:40:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:40:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:40:46,816 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:40:46,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-12-02 06:40:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:40:47,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 2444 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 06:40:47,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:40:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-12-02 06:40:47,399 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:40:47,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807409640] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:40:47,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:40:47,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-12-02 06:40:47,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497958201] [2024-12-02 06:40:47,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:40:47,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:40:47,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:40:47,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:40:47,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-12-02 06:40:47,401 INFO L87 Difference]: Start difference. First operand 111528 states and 190691 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2024-12-02 06:40:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:40:56,613 INFO L93 Difference]: Finished difference Result 228704 states and 398659 transitions. [2024-12-02 06:40:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:40:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 260 [2024-12-02 06:40:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:40:57,534 INFO L225 Difference]: With dead ends: 228704 [2024-12-02 06:40:57,534 INFO L226 Difference]: Without dead ends: 117288 [2024-12-02 06:40:58,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-12-02 06:40:58,177 INFO L435 NwaCegarLoop]: 765 mSDtfsCounter, 144 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:40:58,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2272 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:40:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117288 states. [2024-12-02 06:41:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117288 to 116520. [2024-12-02 06:41:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116520 states, 84643 states have (on average 1.546247179329655) internal successors, (130879), 90019 states have internal predecessors, (130879), 26426 states have call successors, (26426), 3765 states have call predecessors, (26426), 5450 states have return successors, (42730), 26847 states have call predecessors, (42730), 26422 states have call successors, (42730) [2024-12-02 06:41:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116520 states to 116520 states and 200035 transitions. [2024-12-02 06:41:08,104 INFO L78 Accepts]: Start accepts. Automaton has 116520 states and 200035 transitions. Word has length 260 [2024-12-02 06:41:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:41:08,104 INFO L471 AbstractCegarLoop]: Abstraction has 116520 states and 200035 transitions. [2024-12-02 06:41:08,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2024-12-02 06:41:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 116520 states and 200035 transitions. [2024-12-02 06:41:08,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-12-02 06:41:08,139 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:41:08,139 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:41:08,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-12-02 06:41:08,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-12-02 06:41:08,339 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:41:08,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:41:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1122468747, now seen corresponding path program 1 times [2024-12-02 06:41:08,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:41:08,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722700691] [2024-12-02 06:41:08,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:41:08,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:41:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:41:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-12-02 06:41:08,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:41:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722700691] [2024-12-02 06:41:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722700691] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:41:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538746521] [2024-12-02 06:41:08,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:41:08,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:41:08,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:41:08,537 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:41:08,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-12-02 06:41:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:41:08,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:41:08,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:41:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-12-02 06:41:09,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:41:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-12-02 06:41:09,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538746521] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:41:09,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:41:09,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-12-02 06:41:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452546121] [2024-12-02 06:41:09,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:41:09,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 06:41:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:41:09,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 06:41:09,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-12-02 06:41:09,382 INFO L87 Difference]: Start difference. First operand 116520 states and 200035 transitions. Second operand has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 9 states have call successors, (46), 6 states have call predecessors, (46), 7 states have return successors, (45), 8 states have call predecessors, (45), 8 states have call successors, (45) [2024-12-02 06:41:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:41:43,924 INFO L93 Difference]: Finished difference Result 457310 states and 878008 transitions. [2024-12-02 06:41:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-12-02 06:41:43,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 9 states have call successors, (46), 6 states have call predecessors, (46), 7 states have return successors, (45), 8 states have call predecessors, (45), 8 states have call successors, (45) Word has length 228 [2024-12-02 06:41:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:41:46,972 INFO L225 Difference]: With dead ends: 457310 [2024-12-02 06:41:46,972 INFO L226 Difference]: Without dead ends: 340756 [2024-12-02 06:41:48,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 473 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=658, Invalid=4034, Unknown=0, NotChecked=0, Total=4692 [2024-12-02 06:41:48,673 INFO L435 NwaCegarLoop]: 537 mSDtfsCounter, 6332 mSDsluCounter, 3129 mSDsCounter, 0 mSdLazyCounter, 9881 mSolverCounterSat, 1826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6397 SdHoareTripleChecker+Valid, 3666 SdHoareTripleChecker+Invalid, 11707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1826 IncrementalHoareTripleChecker+Valid, 9881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-12-02 06:41:48,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6397 Valid, 3666 Invalid, 11707 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1826 Valid, 9881 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-12-02 06:41:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340756 states. [2024-12-02 06:42:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340756 to 319528. [2024-12-02 06:42:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319528 states, 233528 states have (on average 1.495486622589154) internal successors, (349238), 248563 states have internal predecessors, (349238), 68894 states have call successors, (68894), 11819 states have call predecessors, (68894), 17105 states have return successors, (158424), 68617 states have call predecessors, (158424), 68890 states have call successors, (158424) [2024-12-02 06:42:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319528 states to 319528 states and 576556 transitions. [2024-12-02 06:42:18,473 INFO L78 Accepts]: Start accepts. Automaton has 319528 states and 576556 transitions. Word has length 228 [2024-12-02 06:42:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:42:18,473 INFO L471 AbstractCegarLoop]: Abstraction has 319528 states and 576556 transitions. [2024-12-02 06:42:18,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 9 states have call successors, (46), 6 states have call predecessors, (46), 7 states have return successors, (45), 8 states have call predecessors, (45), 8 states have call successors, (45) [2024-12-02 06:42:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 319528 states and 576556 transitions. [2024-12-02 06:42:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2024-12-02 06:42:18,553 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:42:18,553 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:42:18,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-12-02 06:42:18,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-12-02 06:42:18,753 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 06:42:18,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:42:18,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1153007018, now seen corresponding path program 1 times [2024-12-02 06:42:18,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:42:18,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418011006] [2024-12-02 06:42:18,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:42:18,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:42:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:42:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-12-02 06:42:18,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:42:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418011006] [2024-12-02 06:42:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418011006] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:42:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825890811] [2024-12-02 06:42:18,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:42:18,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:42:18,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:42:18,942 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:42:18,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ce8ef1-090d-47fd-acee-3156de74063d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-12-02 06:42:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:42:19,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 2317 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 06:42:19,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:42:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 06:42:19,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:42:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-12-02 06:42:19,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825890811] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:42:19,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:42:19,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2024-12-02 06:42:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721042978] [2024-12-02 06:42:19,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:42:19,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 06:42:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:42:19,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 06:42:19,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-12-02 06:42:19,835 INFO L87 Difference]: Start difference. First operand 319528 states and 576556 transitions. Second operand has 19 states, 19 states have (on average 14.368421052631579) internal successors, (273), 19 states have internal predecessors, (273), 13 states have call successors, (44), 9 states have call predecessors, (44), 12 states have return successors, (47), 12 states have call predecessors, (47), 12 states have call successors, (47)