./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.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_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB --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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:04:06,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:04:06,437 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:04:06,442 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:04:06,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:04:06,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:04:06,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:04:06,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:04:06,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:04:06,468 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:04:06,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:04:06,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:04:06,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:04:06,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:04:06,469 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:04:06,469 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:04:06,469 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:04:06,469 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:04:06,469 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:04:06,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:04:06,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:04:06,470 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:04:06,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:04:06,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:04:06,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:04:06,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:04:06,471 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:04:06,471 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:04:06,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:04:06,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:04:06,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:04:06,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:04:06,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:04:06,472 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:04:06,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:04:06,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:04:06,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:04:06,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:04:06,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:04:06,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:04:06,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:04:06,473 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_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB 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 -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2024-11-27 20:04:06,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:04:06,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:04:06,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:04:06,813 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:04:06,814 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:04:06,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2024-11-27 20:04:09,760 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/data/12a56d682/d0ba310efcdd4d8d84126502c11953d8/FLAG8529327b8 [2024-11-27 20:04:10,261 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:04:10,262 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2024-11-27 20:04:10,298 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/data/12a56d682/d0ba310efcdd4d8d84126502c11953d8/FLAG8529327b8 [2024-11-27 20:04:10,315 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/data/12a56d682/d0ba310efcdd4d8d84126502c11953d8 [2024-11-27 20:04:10,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:04:10,318 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:04:10,320 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:04:10,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:04:10,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:04:10,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:04:10" (1/1) ... [2024-11-27 20:04:10,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b5866bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:10, skipping insertion in model container [2024-11-27 20:04:10,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:04:10" (1/1) ... [2024-11-27 20:04:10,379 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:04:10,816 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_6996cff1-79e6-406c-9843-6e5253953468/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2024-11-27 20:04:10,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:04:11,015 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:04:11,025 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2024-11-27 20:04:11,026 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [412] [2024-11-27 20:04:11,026 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [447] [2024-11-27 20:04:11,026 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [567] [2024-11-27 20:04:11,027 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1239] [2024-11-27 20:04:11,027 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1252] [2024-11-27 20:04:11,027 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1618] [2024-11-27 20:04:11,027 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [1627] [2024-11-27 20:04:11,027 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1813] [2024-11-27 20:04:11,027 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1905] [2024-11-27 20:04:11,088 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_6996cff1-79e6-406c-9843-6e5253953468/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2024-11-27 20:04:11,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:04:11,162 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:04:11,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11 WrapperNode [2024-11-27 20:04:11,163 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:04:11,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:04:11,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:04:11,164 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:04:11,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,285 INFO L138 Inliner]: procedures = 95, calls = 343, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1150 [2024-11-27 20:04:11,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:04:11,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:04:11,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:04:11,286 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:04:11,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,310 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,347 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]. [2024-11-27 20:04:11,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,369 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:04:11,410 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:04:11,410 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:04:11,410 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:04:11,411 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (1/1) ... [2024-11-27 20:04:11,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:04:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:11,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:04:11,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:04:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2024-11-27 20:04:11,511 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2024-11-27 20:04:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:04:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-27 20:04:11,512 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-27 20:04:11,512 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2024-11-27 20:04:11,512 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2024-11-27 20:04:11,512 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-27 20:04:11,512 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-27 20:04:11,512 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-27 20:04:11,513 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-27 20:04:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-27 20:04:11,513 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-27 20:04:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-27 20:04:11,514 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-27 20:04:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-27 20:04:11,514 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-27 20:04:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-27 20:04:11,516 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-27 20:04:11,516 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-27 20:04:11,517 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-27 20:04:11,517 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-27 20:04:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-27 20:04:11,518 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-27 20:04:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-27 20:04:11,518 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-27 20:04:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-27 20:04:11,518 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-27 20:04:11,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-27 20:04:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-27 20:04:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-27 20:04:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-27 20:04:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#18 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#19 [2024-11-27 20:04:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-27 20:04:11,523 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-27 20:04:11,524 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-27 20:04:11,524 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-27 20:04:11,524 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-27 20:04:11,524 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-27 20:04:11,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:04:11,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:04:11,524 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-27 20:04:11,524 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-27 20:04:11,771 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:04:11,773 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:04:13,343 INFO L? ?]: Removed 461 outVars from TransFormulas that were not future-live. [2024-11-27 20:04:13,344 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:04:13,382 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:04:13,382 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 20:04:13,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:04:13 BoogieIcfgContainer [2024-11-27 20:04:13,383 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:04:13,385 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:04:13,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:04:13,391 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:04:13,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:04:10" (1/3) ... [2024-11-27 20:04:13,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fac683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:04:13, skipping insertion in model container [2024-11-27 20:04:13,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:04:11" (2/3) ... [2024-11-27 20:04:13,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fac683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:04:13, skipping insertion in model container [2024-11-27 20:04:13,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:04:13" (3/3) ... [2024-11-27 20:04:13,393 INFO L128 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2024-11-27 20:04:13,409 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:04:13,411 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elevator_spec1_product27.cil.c that has 26 procedures, 575 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-27 20:04:13,487 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:04:13,500 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;@63bf59fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:04:13,501 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:04:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 575 states, 449 states have (on average 1.688195991091314) internal successors, (758), 470 states have internal predecessors, (758), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2024-11-27 20:04:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-27 20:04:13,537 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:13,542 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:13,542 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:13,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 515837204, now seen corresponding path program 1 times [2024-11-27 20:04:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:13,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572604649] [2024-11-27 20:04:13,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:14,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:14,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572604649] [2024-11-27 20:04:14,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572604649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:14,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930542403] [2024-11-27 20:04:14,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:14,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:14,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:14,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:04:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:15,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 20:04:15,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:15,174 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:15,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930542403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:15,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:15,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-11-27 20:04:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446222800] [2024-11-27 20:04:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:15,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:04:15,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:15,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:04:15,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:04:15,216 INFO L87 Difference]: Start difference. First operand has 575 states, 449 states have (on average 1.688195991091314) internal successors, (758), 470 states have internal predecessors, (758), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-27 20:04:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:15,332 INFO L93 Difference]: Finished difference Result 596 states and 986 transitions. [2024-11-27 20:04:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:04:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2024-11-27 20:04:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:15,358 INFO L225 Difference]: With dead ends: 596 [2024-11-27 20:04:15,358 INFO L226 Difference]: Without dead ends: 567 [2024-11-27 20:04:15,362 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:04:15,365 INFO L435 NwaCegarLoop]: 947 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, 947 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 [2024-11-27 20:04:15,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-11-27 20:04:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-11-27 20:04:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 443 states have (on average 1.6862302483069977) internal successors, (747), 462 states have internal predecessors, (747), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 940 transitions. [2024-11-27 20:04:15,464 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 940 transitions. Word has length 125 [2024-11-27 20:04:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:15,466 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 940 transitions. [2024-11-27 20:04:15,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-27 20:04:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 940 transitions. [2024-11-27 20:04:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-27 20:04:15,475 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:15,475 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:15,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:04:15,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-27 20:04:15,680 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:15,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1603765767, now seen corresponding path program 1 times [2024-11-27 20:04:15,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:15,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70518297] [2024-11-27 20:04:15,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:16,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70518297] [2024-11-27 20:04:16,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70518297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561523112] [2024-11-27 20:04:16,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:16,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:16,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:16,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:04:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:16,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 1861 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:16,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:16,638 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:16,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561523112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:16,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:16,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 20:04:16,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874109303] [2024-11-27 20:04:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:16,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:16,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:16,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:16,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:16,641 INFO L87 Difference]: Start difference. First operand 567 states and 940 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:16,788 INFO L93 Difference]: Finished difference Result 1125 states and 1872 transitions. [2024-11-27 20:04:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:04:16,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 126 [2024-11-27 20:04:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:16,800 INFO L225 Difference]: With dead ends: 1125 [2024-11-27 20:04:16,801 INFO L226 Difference]: Without dead ends: 567 [2024-11-27 20:04:16,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:16,809 INFO L435 NwaCegarLoop]: 928 mSDtfsCounter, 5 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2778 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 [2024-11-27 20:04:16,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2778 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-11-27 20:04:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-11-27 20:04:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 443 states have (on average 1.6839729119638827) internal successors, (746), 462 states have internal predecessors, (746), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 939 transitions. [2024-11-27 20:04:16,868 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 939 transitions. Word has length 126 [2024-11-27 20:04:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:16,870 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 939 transitions. [2024-11-27 20:04:16,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 939 transitions. [2024-11-27 20:04:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-27 20:04:16,880 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:16,880 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:16,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:17,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:17,081 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:17,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2061874461, now seen corresponding path program 1 times [2024-11-27 20:04:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494982531] [2024-11-27 20:04:17,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:17,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494982531] [2024-11-27 20:04:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494982531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415982621] [2024-11-27 20:04:17,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:17,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:17,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:04:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:17,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:17,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:17,863 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:17,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415982621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:17,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:17,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 20:04:17,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142934585] [2024-11-27 20:04:17,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:17,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:17,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:17,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:17,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:17,866 INFO L87 Difference]: Start difference. First operand 567 states and 939 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:17,950 INFO L93 Difference]: Finished difference Result 1125 states and 1870 transitions. [2024-11-27 20:04:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:04:17,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2024-11-27 20:04:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:17,957 INFO L225 Difference]: With dead ends: 1125 [2024-11-27 20:04:17,957 INFO L226 Difference]: Without dead ends: 567 [2024-11-27 20:04:17,960 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:17,961 INFO L435 NwaCegarLoop]: 928 mSDtfsCounter, 4 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2778 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 [2024-11-27 20:04:17,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2778 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-11-27 20:04:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-11-27 20:04:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 443 states have (on average 1.6817155756207676) internal successors, (745), 462 states have internal predecessors, (745), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 938 transitions. [2024-11-27 20:04:18,005 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 938 transitions. Word has length 128 [2024-11-27 20:04:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:18,005 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 938 transitions. [2024-11-27 20:04:18,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 938 transitions. [2024-11-27 20:04:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-27 20:04:18,013 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:18,014 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:18,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:18,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:18,214 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:18,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:18,215 INFO L85 PathProgramCache]: Analyzing trace with hash -988725895, now seen corresponding path program 1 times [2024-11-27 20:04:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146743933] [2024-11-27 20:04:18,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:18,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:18,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:18,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146743933] [2024-11-27 20:04:18,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146743933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:18,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010103478] [2024-11-27 20:04:18,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:18,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:18,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:18,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:18,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:04:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:18,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 1865 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:18,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:18,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:18,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010103478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:18,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:18,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 20:04:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557480201] [2024-11-27 20:04:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:18,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:18,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:18,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:18,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:18,914 INFO L87 Difference]: Start difference. First operand 567 states and 938 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:19,018 INFO L93 Difference]: Finished difference Result 1132 states and 1877 transitions. [2024-11-27 20:04:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 130 [2024-11-27 20:04:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:19,025 INFO L225 Difference]: With dead ends: 1132 [2024-11-27 20:04:19,025 INFO L226 Difference]: Without dead ends: 576 [2024-11-27 20:04:19,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:19,029 INFO L435 NwaCegarLoop]: 927 mSDtfsCounter, 13 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2775 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 [2024-11-27 20:04:19,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2775 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-11-27 20:04:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2024-11-27 20:04:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 451 states have (on average 1.6784922394678492) internal successors, (757), 470 states have internal predecessors, (757), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 950 transitions. [2024-11-27 20:04:19,059 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 950 transitions. Word has length 130 [2024-11-27 20:04:19,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:19,059 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 950 transitions. [2024-11-27 20:04:19,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 950 transitions. [2024-11-27 20:04:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-27 20:04:19,064 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:19,064 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:19,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:04:19,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:19,265 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:19,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -162908364, now seen corresponding path program 1 times [2024-11-27 20:04:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:19,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313844872] [2024-11-27 20:04:19,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:19,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313844872] [2024-11-27 20:04:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313844872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306928015] [2024-11-27 20:04:19,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:19,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:19,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:19,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:04:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:19,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:19,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:19,967 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:19,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306928015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:19,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 20:04:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212412192] [2024-11-27 20:04:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:19,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:19,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:19,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:19,969 INFO L87 Difference]: Start difference. First operand 576 states and 950 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:20,060 INFO L93 Difference]: Finished difference Result 1134 states and 1878 transitions. [2024-11-27 20:04:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:20,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2024-11-27 20:04:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:20,066 INFO L225 Difference]: With dead ends: 1134 [2024-11-27 20:04:20,066 INFO L226 Difference]: Without dead ends: 576 [2024-11-27 20:04:20,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:20,070 INFO L435 NwaCegarLoop]: 927 mSDtfsCounter, 11 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2775 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 [2024-11-27 20:04:20,070 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2775 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-11-27 20:04:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2024-11-27 20:04:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 451 states have (on average 1.6762749445676275) internal successors, (756), 470 states have internal predecessors, (756), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 949 transitions. [2024-11-27 20:04:20,099 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 949 transitions. Word has length 131 [2024-11-27 20:04:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:20,099 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 949 transitions. [2024-11-27 20:04:20,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 949 transitions. [2024-11-27 20:04:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-27 20:04:20,104 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:20,105 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:20,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:20,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:20,309 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:20,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:20,310 INFO L85 PathProgramCache]: Analyzing trace with hash -997654955, now seen corresponding path program 1 times [2024-11-27 20:04:20,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:20,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250251779] [2024-11-27 20:04:20,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:20,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:20,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250251779] [2024-11-27 20:04:20,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250251779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955850414] [2024-11-27 20:04:20,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:20,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:20,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:20,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:20,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:04:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:20,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:20,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:20,993 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:20,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955850414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:20,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:20,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 20:04:20,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222364566] [2024-11-27 20:04:20,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:20,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:20,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:20,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:20,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:20,996 INFO L87 Difference]: Start difference. First operand 576 states and 949 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:21,091 INFO L93 Difference]: Finished difference Result 1134 states and 1877 transitions. [2024-11-27 20:04:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:21,091 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2024-11-27 20:04:21,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:21,098 INFO L225 Difference]: With dead ends: 1134 [2024-11-27 20:04:21,098 INFO L226 Difference]: Without dead ends: 576 [2024-11-27 20:04:21,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:21,102 INFO L435 NwaCegarLoop]: 927 mSDtfsCounter, 10 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2775 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 [2024-11-27 20:04:21,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2775 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-11-27 20:04:21,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2024-11-27 20:04:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 451 states have (on average 1.6740576496674058) internal successors, (755), 470 states have internal predecessors, (755), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 948 transitions. [2024-11-27 20:04:21,139 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 948 transitions. Word has length 132 [2024-11-27 20:04:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:21,140 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 948 transitions. [2024-11-27 20:04:21,140 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 948 transitions. [2024-11-27 20:04:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-27 20:04:21,145 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:21,145 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:21,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:04:21,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:21,350 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:21,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1770281776, now seen corresponding path program 1 times [2024-11-27 20:04:21,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:21,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172028977] [2024-11-27 20:04:21,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:21,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:21,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172028977] [2024-11-27 20:04:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172028977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181509607] [2024-11-27 20:04:21,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:21,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:21,581 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:21,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:04:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:22,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:22,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:04:22,049 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181509607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:22,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:22,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-27 20:04:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993786437] [2024-11-27 20:04:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:22,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:22,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:22,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:22,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:22,051 INFO L87 Difference]: Start difference. First operand 576 states and 948 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2024-11-27 20:04:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:22,238 INFO L93 Difference]: Finished difference Result 1160 states and 1924 transitions. [2024-11-27 20:04:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:04:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 133 [2024-11-27 20:04:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:22,246 INFO L225 Difference]: With dead ends: 1160 [2024-11-27 20:04:22,247 INFO L226 Difference]: Without dead ends: 591 [2024-11-27 20:04:22,250 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:22,250 INFO L435 NwaCegarLoop]: 902 mSDtfsCounter, 76 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2666 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 [2024-11-27 20:04:22,251 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 2666 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2024-11-27 20:04:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 576. [2024-11-27 20:04:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 451 states have (on average 1.6629711751662972) internal successors, (750), 470 states have internal predecessors, (750), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 943 transitions. [2024-11-27 20:04:22,321 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 943 transitions. Word has length 133 [2024-11-27 20:04:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:22,321 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 943 transitions. [2024-11-27 20:04:22,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2024-11-27 20:04:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 943 transitions. [2024-11-27 20:04:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-27 20:04:22,327 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:22,327 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:22,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:04:22,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 20:04:22,528 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:22,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1484473664, now seen corresponding path program 1 times [2024-11-27 20:04:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:22,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065603602] [2024-11-27 20:04:22,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:22,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:22,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065603602] [2024-11-27 20:04:22,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065603602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:22,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593698963] [2024-11-27 20:04:22,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:22,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:22,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:22,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:04:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:23,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:23,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:04:23,306 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:23,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593698963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:23,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:23,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-27 20:04:23,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873424082] [2024-11-27 20:04:23,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:23,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:23,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:23,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:23,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:23,307 INFO L87 Difference]: Start difference. First operand 576 states and 943 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-11-27 20:04:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:23,484 INFO L93 Difference]: Finished difference Result 1160 states and 1914 transitions. [2024-11-27 20:04:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:04:23,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 135 [2024-11-27 20:04:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:23,490 INFO L225 Difference]: With dead ends: 1160 [2024-11-27 20:04:23,490 INFO L226 Difference]: Without dead ends: 591 [2024-11-27 20:04:23,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:23,494 INFO L435 NwaCegarLoop]: 902 mSDtfsCounter, 75 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 2666 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 [2024-11-27 20:04:23,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 2666 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2024-11-27 20:04:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 576. [2024-11-27 20:04:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 451 states have (on average 1.6518847006651884) internal successors, (745), 470 states have internal predecessors, (745), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 938 transitions. [2024-11-27 20:04:23,522 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 938 transitions. Word has length 135 [2024-11-27 20:04:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:23,522 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 938 transitions. [2024-11-27 20:04:23,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-11-27 20:04:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 938 transitions. [2024-11-27 20:04:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-27 20:04:23,526 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:23,527 INFO L218 NwaCegarLoop]: trace histogram [2, 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] [2024-11-27 20:04:23,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:04:23,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 20:04:23,727 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:23,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1106644464, now seen corresponding path program 1 times [2024-11-27 20:04:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:23,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329630227] [2024-11-27 20:04:23,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:23,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329630227] [2024-11-27 20:04:23,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329630227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190164700] [2024-11-27 20:04:23,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:23,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:23,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:23,986 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:23,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:04:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:24,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:24,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:04:24,463 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:24,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190164700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:24,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:24,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-27 20:04:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375777459] [2024-11-27 20:04:24,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:24,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:24,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:24,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:24,466 INFO L87 Difference]: Start difference. First operand 576 states and 938 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2024-11-27 20:04:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:24,716 INFO L93 Difference]: Finished difference Result 1211 states and 1987 transitions. [2024-11-27 20:04:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 137 [2024-11-27 20:04:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:24,723 INFO L225 Difference]: With dead ends: 1211 [2024-11-27 20:04:24,723 INFO L226 Difference]: Without dead ends: 657 [2024-11-27 20:04:24,726 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:24,728 INFO L435 NwaCegarLoop]: 935 mSDtfsCounter, 130 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:24,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 2697 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:04:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2024-11-27 20:04:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 627. [2024-11-27 20:04:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 501 states have (on average 1.656686626746507) internal successors, (830), 520 states have internal predecessors, (830), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1023 transitions. [2024-11-27 20:04:24,759 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1023 transitions. Word has length 137 [2024-11-27 20:04:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:24,759 INFO L471 AbstractCegarLoop]: Abstraction has 627 states and 1023 transitions. [2024-11-27 20:04:24,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2024-11-27 20:04:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1023 transitions. [2024-11-27 20:04:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-27 20:04:24,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:24,764 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:24,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:04:24,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:24,968 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:24,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2094045243, now seen corresponding path program 1 times [2024-11-27 20:04:24,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:24,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787302990] [2024-11-27 20:04:24,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:25,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:25,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787302990] [2024-11-27 20:04:25,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787302990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:25,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552036453] [2024-11-27 20:04:25,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:25,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:25,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:25,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:04:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:25,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:25,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:04:25,669 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552036453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:25,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:25,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-27 20:04:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144685364] [2024-11-27 20:04:25,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:25,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:25,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:25,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:25,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:25,673 INFO L87 Difference]: Start difference. First operand 627 states and 1023 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-11-27 20:04:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:25,912 INFO L93 Difference]: Finished difference Result 1226 states and 2011 transitions. [2024-11-27 20:04:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:25,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 138 [2024-11-27 20:04:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:25,919 INFO L225 Difference]: With dead ends: 1226 [2024-11-27 20:04:25,919 INFO L226 Difference]: Without dead ends: 657 [2024-11-27 20:04:25,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:25,923 INFO L435 NwaCegarLoop]: 934 mSDtfsCounter, 124 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:25,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 2670 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:04:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2024-11-27 20:04:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 627. [2024-11-27 20:04:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 501 states have (on average 1.6467065868263473) internal successors, (825), 520 states have internal predecessors, (825), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-27 20:04:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1018 transitions. [2024-11-27 20:04:25,958 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1018 transitions. Word has length 138 [2024-11-27 20:04:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:25,958 INFO L471 AbstractCegarLoop]: Abstraction has 627 states and 1018 transitions. [2024-11-27 20:04:25,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-11-27 20:04:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1018 transitions. [2024-11-27 20:04:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-27 20:04:25,962 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:25,962 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:25,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:04:26,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 20:04:26,164 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:26,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1441858140, now seen corresponding path program 1 times [2024-11-27 20:04:26,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:26,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245210713] [2024-11-27 20:04:26,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:26,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:26,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245210713] [2024-11-27 20:04:26,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245210713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665223870] [2024-11-27 20:04:26,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:26,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:26,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:26,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:26,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:04:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:26,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:04:26,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:04:26,927 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665223870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:26,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:26,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-27 20:04:26,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21244503] [2024-11-27 20:04:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:26,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:04:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:26,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:04:26,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:04:26,930 INFO L87 Difference]: Start difference. First operand 627 states and 1018 transitions. Second operand has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:27,142 INFO L93 Difference]: Finished difference Result 1219 states and 1991 transitions. [2024-11-27 20:04:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:04:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 138 [2024-11-27 20:04:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:27,149 INFO L225 Difference]: With dead ends: 1219 [2024-11-27 20:04:27,150 INFO L226 Difference]: Without dead ends: 665 [2024-11-27 20:04:27,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:04:27,154 INFO L435 NwaCegarLoop]: 908 mSDtfsCounter, 113 mSDsluCounter, 5359 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6267 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 [2024-11-27 20:04:27,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6267 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2024-11-27 20:04:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 646. [2024-11-27 20:04:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 517 states have (on average 1.6460348162475822) internal successors, (851), 538 states have internal predecessors, (851), 100 states have call successors, (100), 27 states have call predecessors, (100), 28 states have return successors, (97), 93 states have call predecessors, (97), 95 states have call successors, (97) [2024-11-27 20:04:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1048 transitions. [2024-11-27 20:04:27,188 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1048 transitions. Word has length 138 [2024-11-27 20:04:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:27,189 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 1048 transitions. [2024-11-27 20:04:27,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1048 transitions. [2024-11-27 20:04:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-27 20:04:27,193 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:27,194 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:27,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:04:27,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 20:04:27,398 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:27,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:27,399 INFO L85 PathProgramCache]: Analyzing trace with hash -461601955, now seen corresponding path program 1 times [2024-11-27 20:04:27,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:27,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283174593] [2024-11-27 20:04:27,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:27,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:27,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283174593] [2024-11-27 20:04:27,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283174593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:27,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988509436] [2024-11-27 20:04:27,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:27,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:27,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:27,521 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:27,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:04:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:27,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:04:27,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:28,061 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988509436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:28,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:28,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-11-27 20:04:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811112943] [2024-11-27 20:04:28,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:28,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:04:28,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:28,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:04:28,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:28,062 INFO L87 Difference]: Start difference. First operand 646 states and 1048 transitions. Second operand has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:28,193 INFO L93 Difference]: Finished difference Result 1157 states and 1891 transitions. [2024-11-27 20:04:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:04:28,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 138 [2024-11-27 20:04:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:28,200 INFO L225 Difference]: With dead ends: 1157 [2024-11-27 20:04:28,201 INFO L226 Difference]: Without dead ends: 670 [2024-11-27 20:04:28,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:28,204 INFO L435 NwaCegarLoop]: 921 mSDtfsCounter, 86 mSDsluCounter, 4526 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5447 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:28,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 5447 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2024-11-27 20:04:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 665. [2024-11-27 20:04:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 533 states have (on average 1.6454033771106942) internal successors, (877), 556 states have internal predecessors, (877), 101 states have call successors, (101), 27 states have call predecessors, (101), 30 states have return successors, (100), 94 states have call predecessors, (100), 96 states have call successors, (100) [2024-11-27 20:04:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1078 transitions. [2024-11-27 20:04:28,238 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1078 transitions. Word has length 138 [2024-11-27 20:04:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:28,239 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 1078 transitions. [2024-11-27 20:04:28,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1078 transitions. [2024-11-27 20:04:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-27 20:04:28,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:28,245 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:28,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:28,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 20:04:28,446 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:28,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:28,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1432970989, now seen corresponding path program 1 times [2024-11-27 20:04:28,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:28,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931826388] [2024-11-27 20:04:28,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:28,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:28,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:28,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931826388] [2024-11-27 20:04:28,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931826388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:28,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533207923] [2024-11-27 20:04:28,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:28,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:28,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:28,568 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:28,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:04:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:28,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:04:28,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:29,068 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:29,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533207923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:29,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:29,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-11-27 20:04:29,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381031416] [2024-11-27 20:04:29,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:29,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:04:29,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:29,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:04:29,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:29,070 INFO L87 Difference]: Start difference. First operand 665 states and 1078 transitions. Second operand has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:29,187 INFO L93 Difference]: Finished difference Result 1187 states and 1942 transitions. [2024-11-27 20:04:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:04:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2024-11-27 20:04:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:29,194 INFO L225 Difference]: With dead ends: 1187 [2024-11-27 20:04:29,194 INFO L226 Difference]: Without dead ends: 700 [2024-11-27 20:04:29,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:29,197 INFO L435 NwaCegarLoop]: 921 mSDtfsCounter, 95 mSDsluCounter, 4516 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 5437 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 [2024-11-27 20:04:29,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 5437 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2024-11-27 20:04:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 665. [2024-11-27 20:04:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 533 states have (on average 1.6454033771106942) internal successors, (877), 556 states have internal predecessors, (877), 101 states have call successors, (101), 27 states have call predecessors, (101), 30 states have return successors, (100), 94 states have call predecessors, (100), 96 states have call successors, (100) [2024-11-27 20:04:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1078 transitions. [2024-11-27 20:04:29,226 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1078 transitions. Word has length 139 [2024-11-27 20:04:29,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:29,226 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 1078 transitions. [2024-11-27 20:04:29,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1078 transitions. [2024-11-27 20:04:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-27 20:04:29,230 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:29,230 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 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] [2024-11-27 20:04:29,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:29,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 20:04:29,431 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:29,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash 538799251, now seen corresponding path program 1 times [2024-11-27 20:04:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:29,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645449051] [2024-11-27 20:04:29,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:29,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:29,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645449051] [2024-11-27 20:04:29,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645449051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:29,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869590769] [2024-11-27 20:04:29,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:29,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:29,544 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:29,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:04:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:29,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 1865 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:04:30,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:30,103 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869590769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:30,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-11-27 20:04:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230709698] [2024-11-27 20:04:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:30,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:04:30,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:30,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:04:30,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:30,107 INFO L87 Difference]: Start difference. First operand 665 states and 1078 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:30,315 INFO L93 Difference]: Finished difference Result 1172 states and 1916 transitions. [2024-11-27 20:04:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:04:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2024-11-27 20:04:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:30,324 INFO L225 Difference]: With dead ends: 1172 [2024-11-27 20:04:30,324 INFO L226 Difference]: Without dead ends: 685 [2024-11-27 20:04:30,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:04:30,328 INFO L435 NwaCegarLoop]: 910 mSDtfsCounter, 113 mSDsluCounter, 5365 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6275 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 [2024-11-27 20:04:30,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6275 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2024-11-27 20:04:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 665. [2024-11-27 20:04:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 533 states have (on average 1.6454033771106942) internal successors, (877), 556 states have internal predecessors, (877), 101 states have call successors, (101), 27 states have call predecessors, (101), 30 states have return successors, (100), 94 states have call predecessors, (100), 96 states have call successors, (100) [2024-11-27 20:04:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1078 transitions. [2024-11-27 20:04:30,366 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1078 transitions. Word has length 139 [2024-11-27 20:04:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:30,367 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 1078 transitions. [2024-11-27 20:04:30,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1078 transitions. [2024-11-27 20:04:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-27 20:04:30,372 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:30,372 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:30,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:30,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 20:04:30,573 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:30,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash -888156104, now seen corresponding path program 1 times [2024-11-27 20:04:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300563754] [2024-11-27 20:04:30,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300563754] [2024-11-27 20:04:30,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300563754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:30,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585089638] [2024-11-27 20:04:30,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:30,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:30,712 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:30,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:04:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:31,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:31,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 20:04:31,162 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585089638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:31,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:31,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 20:04:31,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44043963] [2024-11-27 20:04:31,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:31,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:31,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:31,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:31,164 INFO L87 Difference]: Start difference. First operand 665 states and 1078 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-11-27 20:04:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:31,229 INFO L93 Difference]: Finished difference Result 1224 states and 2001 transitions. [2024-11-27 20:04:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 139 [2024-11-27 20:04:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:31,235 INFO L225 Difference]: With dead ends: 1224 [2024-11-27 20:04:31,235 INFO L226 Difference]: Without dead ends: 665 [2024-11-27 20:04:31,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:31,240 INFO L435 NwaCegarLoop]: 916 mSDtfsCounter, 13 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2744 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 [2024-11-27 20:04:31,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2744 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2024-11-27 20:04:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2024-11-27 20:04:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 533 states have (on average 1.6378986866791745) internal successors, (873), 556 states have internal predecessors, (873), 101 states have call successors, (101), 27 states have call predecessors, (101), 30 states have return successors, (100), 94 states have call predecessors, (100), 96 states have call successors, (100) [2024-11-27 20:04:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1074 transitions. [2024-11-27 20:04:31,268 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1074 transitions. Word has length 139 [2024-11-27 20:04:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:31,268 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 1074 transitions. [2024-11-27 20:04:31,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-11-27 20:04:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1074 transitions. [2024-11-27 20:04:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-27 20:04:31,273 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:31,273 INFO L218 NwaCegarLoop]: trace histogram [2, 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] [2024-11-27 20:04:31,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:04:31,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 20:04:31,478 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:31,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash 119563781, now seen corresponding path program 1 times [2024-11-27 20:04:31,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:31,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346220031] [2024-11-27 20:04:31,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:31,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:31,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346220031] [2024-11-27 20:04:31,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346220031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:31,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438515230] [2024-11-27 20:04:31,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:31,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:31,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:31,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:04:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:31,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:04:31,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-27 20:04:32,032 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438515230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:32,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:32,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 20:04:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429524682] [2024-11-27 20:04:32,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:32,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:32,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:32,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:32,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:32,033 INFO L87 Difference]: Start difference. First operand 665 states and 1074 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:32,106 INFO L93 Difference]: Finished difference Result 1268 states and 2069 transitions. [2024-11-27 20:04:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:04:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2024-11-27 20:04:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:32,112 INFO L225 Difference]: With dead ends: 1268 [2024-11-27 20:04:32,112 INFO L226 Difference]: Without dead ends: 689 [2024-11-27 20:04:32,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:04:32,117 INFO L435 NwaCegarLoop]: 910 mSDtfsCounter, 7 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2717 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 [2024-11-27 20:04:32,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2717 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2024-11-27 20:04:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 689. [2024-11-27 20:04:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 557 states have (on average 1.6175942549371634) internal successors, (901), 580 states have internal predecessors, (901), 101 states have call successors, (101), 27 states have call predecessors, (101), 30 states have return successors, (100), 94 states have call predecessors, (100), 96 states have call successors, (100) [2024-11-27 20:04:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1102 transitions. [2024-11-27 20:04:32,177 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1102 transitions. Word has length 140 [2024-11-27 20:04:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:32,178 INFO L471 AbstractCegarLoop]: Abstraction has 689 states and 1102 transitions. [2024-11-27 20:04:32,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-27 20:04:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1102 transitions. [2024-11-27 20:04:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-27 20:04:32,183 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:32,183 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 20:04:32,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 20:04:32,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:04:32,384 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:32,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2145286493, now seen corresponding path program 1 times [2024-11-27 20:04:32,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:32,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922754974] [2024-11-27 20:04:32,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:32,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:32,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:32,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922754974] [2024-11-27 20:04:32,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922754974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:32,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154828765] [2024-11-27 20:04:32,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:32,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:32,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:32,489 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:32,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:04:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:32,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:04:32,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:04:32,987 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:32,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154828765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:32,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:32,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-11-27 20:04:32,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917494014] [2024-11-27 20:04:32,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:32,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:04:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:32,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:04:32,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:32,990 INFO L87 Difference]: Start difference. First operand 689 states and 1102 transitions. Second operand has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:33,159 INFO L93 Difference]: Finished difference Result 1202 states and 1948 transitions. [2024-11-27 20:04:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:04:33,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 141 [2024-11-27 20:04:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:33,166 INFO L225 Difference]: With dead ends: 1202 [2024-11-27 20:04:33,166 INFO L226 Difference]: Without dead ends: 715 [2024-11-27 20:04:33,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:04:33,169 INFO L435 NwaCegarLoop]: 904 mSDtfsCounter, 119 mSDsluCounter, 5327 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6231 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 [2024-11-27 20:04:33,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 6231 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-11-27 20:04:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 689. [2024-11-27 20:04:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 557 states have (on average 1.6175942549371634) internal successors, (901), 580 states have internal predecessors, (901), 101 states have call successors, (101), 27 states have call predecessors, (101), 30 states have return successors, (100), 94 states have call predecessors, (100), 96 states have call successors, (100) [2024-11-27 20:04:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1102 transitions. [2024-11-27 20:04:33,202 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1102 transitions. Word has length 141 [2024-11-27 20:04:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:33,202 INFO L471 AbstractCegarLoop]: Abstraction has 689 states and 1102 transitions. [2024-11-27 20:04:33,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-27 20:04:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1102 transitions. [2024-11-27 20:04:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-27 20:04:33,207 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:33,207 INFO L218 NwaCegarLoop]: trace histogram [2, 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] [2024-11-27 20:04:33,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:33,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 20:04:33,408 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:33,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash 844694173, now seen corresponding path program 1 times [2024-11-27 20:04:33,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:33,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943772519] [2024-11-27 20:04:33,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:04:33,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:33,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943772519] [2024-11-27 20:04:33,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943772519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:33,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856134905] [2024-11-27 20:04:33,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:33,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:33,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:33,516 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:04:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:34,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:04:34,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:04:34,176 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:34,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856134905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:34,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:34,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-27 20:04:34,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167106543] [2024-11-27 20:04:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:34,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:04:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:34,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:04:34,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:34,179 INFO L87 Difference]: Start difference. First operand 689 states and 1102 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:34,761 INFO L93 Difference]: Finished difference Result 1179 states and 1935 transitions. [2024-11-27 20:04:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:04:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 141 [2024-11-27 20:04:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:34,767 INFO L225 Difference]: With dead ends: 1179 [2024-11-27 20:04:34,767 INFO L226 Difference]: Without dead ends: 697 [2024-11-27 20:04:34,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:04:34,771 INFO L435 NwaCegarLoop]: 908 mSDtfsCounter, 875 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:34,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 2344 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:04:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2024-11-27 20:04:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2024-11-27 20:04:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 564 states have (on average 1.6187943262411348) internal successors, (913), 587 states have internal predecessors, (913), 101 states have call successors, (101), 28 states have call predecessors, (101), 31 states have return successors, (101), 94 states have call predecessors, (101), 96 states have call successors, (101) [2024-11-27 20:04:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1115 transitions. [2024-11-27 20:04:34,828 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1115 transitions. Word has length 141 [2024-11-27 20:04:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:34,829 INFO L471 AbstractCegarLoop]: Abstraction has 697 states and 1115 transitions. [2024-11-27 20:04:34,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1115 transitions. [2024-11-27 20:04:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-27 20:04:34,833 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:34,833 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 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] [2024-11-27 20:04:34,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 20:04:35,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 20:04:35,034 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:35,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash 777560807, now seen corresponding path program 1 times [2024-11-27 20:04:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:35,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846398740] [2024-11-27 20:04:35,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:04:35,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:35,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846398740] [2024-11-27 20:04:35,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846398740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:35,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486597109] [2024-11-27 20:04:35,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:35,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:35,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:35,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:04:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:35,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:04:35,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:04:35,670 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486597109] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:35,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:35,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-27 20:04:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122377497] [2024-11-27 20:04:35,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:35,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:04:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:35,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:04:35,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:35,671 INFO L87 Difference]: Start difference. First operand 697 states and 1115 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:36,251 INFO L93 Difference]: Finished difference Result 1195 states and 1958 transitions. [2024-11-27 20:04:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:04:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2024-11-27 20:04:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:36,258 INFO L225 Difference]: With dead ends: 1195 [2024-11-27 20:04:36,258 INFO L226 Difference]: Without dead ends: 705 [2024-11-27 20:04:36,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:04:36,261 INFO L435 NwaCegarLoop]: 905 mSDtfsCounter, 862 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:36,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 2341 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:04:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2024-11-27 20:04:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2024-11-27 20:04:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 571 states have (on average 1.6199649737302977) internal successors, (925), 594 states have internal predecessors, (925), 101 states have call successors, (101), 29 states have call predecessors, (101), 32 states have return successors, (102), 94 states have call predecessors, (102), 96 states have call successors, (102) [2024-11-27 20:04:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1128 transitions. [2024-11-27 20:04:36,290 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1128 transitions. Word has length 143 [2024-11-27 20:04:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:36,290 INFO L471 AbstractCegarLoop]: Abstraction has 705 states and 1128 transitions. [2024-11-27 20:04:36,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1128 transitions. [2024-11-27 20:04:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-27 20:04:36,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:36,295 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2024-11-27 20:04:36,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 20:04:36,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:36,496 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:36,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 952269533, now seen corresponding path program 1 times [2024-11-27 20:04:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296493996] [2024-11-27 20:04:36,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:04:36,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:36,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296493996] [2024-11-27 20:04:36,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296493996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:36,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276752060] [2024-11-27 20:04:36,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:36,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:36,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:36,598 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:36,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:04:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:37,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:04:37,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:04:37,188 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:37,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276752060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:37,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:37,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-27 20:04:37,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858481584] [2024-11-27 20:04:37,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:37,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:04:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:37,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:04:37,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:37,191 INFO L87 Difference]: Start difference. First operand 705 states and 1128 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:37,789 INFO L93 Difference]: Finished difference Result 1211 states and 1981 transitions. [2024-11-27 20:04:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:04:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2024-11-27 20:04:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:37,795 INFO L225 Difference]: With dead ends: 1211 [2024-11-27 20:04:37,795 INFO L226 Difference]: Without dead ends: 713 [2024-11-27 20:04:37,797 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:04:37,798 INFO L435 NwaCegarLoop]: 902 mSDtfsCounter, 866 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 2338 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:37,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 2338 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:04:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-11-27 20:04:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2024-11-27 20:04:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 578 states have (on average 1.6211072664359862) internal successors, (937), 601 states have internal predecessors, (937), 101 states have call successors, (101), 30 states have call predecessors, (101), 33 states have return successors, (103), 94 states have call predecessors, (103), 96 states have call successors, (103) [2024-11-27 20:04:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1141 transitions. [2024-11-27 20:04:37,826 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1141 transitions. Word has length 145 [2024-11-27 20:04:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:37,826 INFO L471 AbstractCegarLoop]: Abstraction has 713 states and 1141 transitions. [2024-11-27 20:04:37,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1141 transitions. [2024-11-27 20:04:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-27 20:04:37,831 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:37,831 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2024-11-27 20:04:37,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:38,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:38,035 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:38,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2016480303, now seen corresponding path program 1 times [2024-11-27 20:04:38,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:38,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113210570] [2024-11-27 20:04:38,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-27 20:04:38,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:38,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113210570] [2024-11-27 20:04:38,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113210570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:38,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783738537] [2024-11-27 20:04:38,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:38,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:38,145 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:38,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:04:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:38,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:04:38,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:04:38,694 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:38,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783738537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:38,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:38,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-27 20:04:38,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173666048] [2024-11-27 20:04:38,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:38,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:04:38,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:38,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:04:38,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:38,696 INFO L87 Difference]: Start difference. First operand 713 states and 1141 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:39,274 INFO L93 Difference]: Finished difference Result 1227 states and 2004 transitions. [2024-11-27 20:04:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:04:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 147 [2024-11-27 20:04:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:39,281 INFO L225 Difference]: With dead ends: 1227 [2024-11-27 20:04:39,281 INFO L226 Difference]: Without dead ends: 721 [2024-11-27 20:04:39,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:04:39,285 INFO L435 NwaCegarLoop]: 899 mSDtfsCounter, 844 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:39,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 2335 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:04:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2024-11-27 20:04:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2024-11-27 20:04:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 585 states have (on average 1.6222222222222222) internal successors, (949), 608 states have internal predecessors, (949), 101 states have call successors, (101), 31 states have call predecessors, (101), 34 states have return successors, (104), 94 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-27 20:04:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1154 transitions. [2024-11-27 20:04:39,320 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1154 transitions. Word has length 147 [2024-11-27 20:04:39,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:39,321 INFO L471 AbstractCegarLoop]: Abstraction has 721 states and 1154 transitions. [2024-11-27 20:04:39,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-27 20:04:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1154 transitions. [2024-11-27 20:04:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-27 20:04:39,326 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:39,326 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2024-11-27 20:04:39,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 20:04:39,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:39,527 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:39,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:39,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2103966435, now seen corresponding path program 1 times [2024-11-27 20:04:39,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:39,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497845354] [2024-11-27 20:04:39,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:39,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497845354] [2024-11-27 20:04:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497845354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124861539] [2024-11-27 20:04:39,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:39,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:39,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:39,635 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:39,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:04:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:40,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:04:40,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-27 20:04:40,297 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124861539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:40,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:40,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-27 20:04:40,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117940081] [2024-11-27 20:04:40,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:40,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:04:40,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:40,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:04:40,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:40,299 INFO L87 Difference]: Start difference. First operand 721 states and 1154 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-27 20:04:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:40,688 INFO L93 Difference]: Finished difference Result 769 states and 1225 transitions. [2024-11-27 20:04:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 149 [2024-11-27 20:04:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:40,695 INFO L225 Difference]: With dead ends: 769 [2024-11-27 20:04:40,695 INFO L226 Difference]: Without dead ends: 754 [2024-11-27 20:04:40,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:40,698 INFO L435 NwaCegarLoop]: 916 mSDtfsCounter, 850 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:40,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1676 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:04:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2024-11-27 20:04:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 723. [2024-11-27 20:04:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 587 states have (on average 1.6201022146507666) internal successors, (951), 610 states have internal predecessors, (951), 101 states have call successors, (101), 31 states have call predecessors, (101), 34 states have return successors, (104), 94 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-27 20:04:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1156 transitions. [2024-11-27 20:04:40,729 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1156 transitions. Word has length 149 [2024-11-27 20:04:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:40,730 INFO L471 AbstractCegarLoop]: Abstraction has 723 states and 1156 transitions. [2024-11-27 20:04:40,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2024-11-27 20:04:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1156 transitions. [2024-11-27 20:04:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-27 20:04:40,734 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:40,734 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2024-11-27 20:04:40,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 20:04:40,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:40,935 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:40,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash -767436648, now seen corresponding path program 1 times [2024-11-27 20:04:40,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:40,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489095056] [2024-11-27 20:04:40,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:41,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:41,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489095056] [2024-11-27 20:04:41,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489095056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:41,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065126645] [2024-11-27 20:04:41,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:41,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:41,052 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:41,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:04:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:41,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:04:41,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-27 20:04:41,525 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065126645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:41,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:41,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2024-11-27 20:04:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276437398] [2024-11-27 20:04:41,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:41,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:04:41,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:41,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:04:41,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:41,527 INFO L87 Difference]: Start difference. First operand 723 states and 1156 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:04:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:41,556 INFO L93 Difference]: Finished difference Result 738 states and 1174 transitions. [2024-11-27 20:04:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 155 [2024-11-27 20:04:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:41,562 INFO L225 Difference]: With dead ends: 738 [2024-11-27 20:04:41,562 INFO L226 Difference]: Without dead ends: 723 [2024-11-27 20:04:41,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:41,564 INFO L435 NwaCegarLoop]: 923 mSDtfsCounter, 0 mSDsluCounter, 2765 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3688 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 [2024-11-27 20:04:41,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3688 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2024-11-27 20:04:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2024-11-27 20:04:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 587 states have (on average 1.6183986371379897) internal successors, (950), 610 states have internal predecessors, (950), 101 states have call successors, (101), 31 states have call predecessors, (101), 34 states have return successors, (104), 94 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-27 20:04:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1155 transitions. [2024-11-27 20:04:41,603 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1155 transitions. Word has length 155 [2024-11-27 20:04:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:41,603 INFO L471 AbstractCegarLoop]: Abstraction has 723 states and 1155 transitions. [2024-11-27 20:04:41,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-27 20:04:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1155 transitions. [2024-11-27 20:04:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-27 20:04:41,609 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:41,610 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:41,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:41,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-27 20:04:41,811 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:41,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1760421317, now seen corresponding path program 1 times [2024-11-27 20:04:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:41,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026695640] [2024-11-27 20:04:41,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:41,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-27 20:04:41,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026695640] [2024-11-27 20:04:41,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026695640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078842594] [2024-11-27 20:04:41,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:41,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:41,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:41,943 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:41,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 20:04:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:42,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:04:42,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 20:04:42,456 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:42,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078842594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:42,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-27 20:04:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496393204] [2024-11-27 20:04:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:42,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:42,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:42,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:04:42,457 INFO L87 Difference]: Start difference. First operand 723 states and 1155 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-27 20:04:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:42,532 INFO L93 Difference]: Finished difference Result 1420 states and 2280 transitions. [2024-11-27 20:04:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) Word has length 166 [2024-11-27 20:04:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:42,540 INFO L225 Difference]: With dead ends: 1420 [2024-11-27 20:04:42,540 INFO L226 Difference]: Without dead ends: 692 [2024-11-27 20:04:42,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:04:42,545 INFO L435 NwaCegarLoop]: 917 mSDtfsCounter, 7 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2744 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 [2024-11-27 20:04:42,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2744 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2024-11-27 20:04:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2024-11-27 20:04:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 559 states have (on average 1.6171735241502683) internal successors, (904), 580 states have internal predecessors, (904), 100 states have call successors, (100), 31 states have call predecessors, (100), 32 states have return successors, (101), 93 states have call predecessors, (101), 95 states have call successors, (101) [2024-11-27 20:04:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1105 transitions. [2024-11-27 20:04:42,598 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1105 transitions. Word has length 166 [2024-11-27 20:04:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:42,598 INFO L471 AbstractCegarLoop]: Abstraction has 692 states and 1105 transitions. [2024-11-27 20:04:42,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-27 20:04:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1105 transitions. [2024-11-27 20:04:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-27 20:04:42,606 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:42,606 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:42,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 20:04:42,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:42,807 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:42,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:42,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1843931514, now seen corresponding path program 1 times [2024-11-27 20:04:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:42,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021328858] [2024-11-27 20:04:42,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:42,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 20:04:43,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021328858] [2024-11-27 20:04:43,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021328858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012076099] [2024-11-27 20:04:43,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:43,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:43,119 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:43,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 20:04:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:43,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 1934 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:04:43,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:04:43,604 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:43,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012076099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:43,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:43,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2024-11-27 20:04:43,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916474202] [2024-11-27 20:04:43,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:43,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:04:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:43,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:04:43,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:43,605 INFO L87 Difference]: Start difference. First operand 692 states and 1105 transitions. Second operand has 7 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:43,697 INFO L93 Difference]: Finished difference Result 1353 states and 2174 transitions. [2024-11-27 20:04:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:04:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 168 [2024-11-27 20:04:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:43,703 INFO L225 Difference]: With dead ends: 1353 [2024-11-27 20:04:43,703 INFO L226 Difference]: Without dead ends: 692 [2024-11-27 20:04:43,706 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:04:43,706 INFO L435 NwaCegarLoop]: 935 mSDtfsCounter, 119 mSDsluCounter, 4549 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 5484 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:43,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 5484 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2024-11-27 20:04:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 671. [2024-11-27 20:04:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 538 states have (on average 1.6171003717472119) internal successors, (870), 559 states have internal predecessors, (870), 100 states have call successors, (100), 31 states have call predecessors, (100), 32 states have return successors, (101), 93 states have call predecessors, (101), 95 states have call successors, (101) [2024-11-27 20:04:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1071 transitions. [2024-11-27 20:04:43,736 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1071 transitions. Word has length 168 [2024-11-27 20:04:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:43,738 INFO L471 AbstractCegarLoop]: Abstraction has 671 states and 1071 transitions. [2024-11-27 20:04:43,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1071 transitions. [2024-11-27 20:04:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-27 20:04:43,741 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:43,741 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-27 20:04:43,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:43,946 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:43,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1145280607, now seen corresponding path program 1 times [2024-11-27 20:04:43,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:43,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173925694] [2024-11-27 20:04:43,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:44,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:44,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173925694] [2024-11-27 20:04:44,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173925694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:44,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086987087] [2024-11-27 20:04:44,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:44,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:44,126 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:44,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 20:04:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:44,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:04:44,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:04:44,601 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086987087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:44,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:44,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-27 20:04:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439698948] [2024-11-27 20:04:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:44,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:44,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:44,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:04:44,603 INFO L87 Difference]: Start difference. First operand 671 states and 1071 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-27 20:04:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:44,757 INFO L93 Difference]: Finished difference Result 1335 states and 2144 transitions. [2024-11-27 20:04:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:44,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 170 [2024-11-27 20:04:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:44,763 INFO L225 Difference]: With dead ends: 1335 [2024-11-27 20:04:44,763 INFO L226 Difference]: Without dead ends: 695 [2024-11-27 20:04:44,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:04:44,766 INFO L435 NwaCegarLoop]: 900 mSDtfsCounter, 128 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2623 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 [2024-11-27 20:04:44,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2623 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2024-11-27 20:04:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 671. [2024-11-27 20:04:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 538 states have (on average 1.6152416356877324) internal successors, (869), 559 states have internal predecessors, (869), 100 states have call successors, (100), 31 states have call predecessors, (100), 32 states have return successors, (101), 93 states have call predecessors, (101), 95 states have call successors, (101) [2024-11-27 20:04:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1070 transitions. [2024-11-27 20:04:44,792 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1070 transitions. Word has length 170 [2024-11-27 20:04:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:44,792 INFO L471 AbstractCegarLoop]: Abstraction has 671 states and 1070 transitions. [2024-11-27 20:04:44,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-27 20:04:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1070 transitions. [2024-11-27 20:04:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-27 20:04:44,795 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:44,795 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:44,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-27 20:04:44,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-27 20:04:44,998 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:44,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1256610282, now seen corresponding path program 1 times [2024-11-27 20:04:44,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:44,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178665203] [2024-11-27 20:04:44,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:44,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-27 20:04:45,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:45,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178665203] [2024-11-27 20:04:45,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178665203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:45,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:04:45,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:04:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847364812] [2024-11-27 20:04:45,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:45,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:45,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:45,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:04:45,125 INFO L87 Difference]: Start difference. First operand 671 states and 1070 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-27 20:04:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:45,177 INFO L93 Difference]: Finished difference Result 1270 states and 2053 transitions. [2024-11-27 20:04:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:04:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 171 [2024-11-27 20:04:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:45,182 INFO L225 Difference]: With dead ends: 1270 [2024-11-27 20:04:45,183 INFO L226 Difference]: Without dead ends: 631 [2024-11-27 20:04:45,185 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 [2024-11-27 20:04:45,185 INFO L435 NwaCegarLoop]: 915 mSDtfsCounter, 8 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2741 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 [2024-11-27 20:04:45,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2741 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2024-11-27 20:04:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2024-11-27 20:04:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 501 states have (on average 1.6087824351297406) internal successors, (806), 520 states have internal predecessors, (806), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2024-11-27 20:04:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1003 transitions. [2024-11-27 20:04:45,209 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1003 transitions. Word has length 171 [2024-11-27 20:04:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:45,210 INFO L471 AbstractCegarLoop]: Abstraction has 631 states and 1003 transitions. [2024-11-27 20:04:45,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-27 20:04:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1003 transitions. [2024-11-27 20:04:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-27 20:04:45,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:45,214 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:45,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-27 20:04:45,215 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:45,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1054455611, now seen corresponding path program 1 times [2024-11-27 20:04:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:45,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424099083] [2024-11-27 20:04:45,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:45,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-27 20:04:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424099083] [2024-11-27 20:04:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424099083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:45,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:04:45,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:04:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836693585] [2024-11-27 20:04:45,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:45,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:04:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:45,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:04:45,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:04:45,409 INFO L87 Difference]: Start difference. First operand 631 states and 1003 transitions. Second operand has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:45,493 INFO L93 Difference]: Finished difference Result 1173 states and 1892 transitions. [2024-11-27 20:04:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:04:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 172 [2024-11-27 20:04:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:45,498 INFO L225 Difference]: With dead ends: 1173 [2024-11-27 20:04:45,499 INFO L226 Difference]: Without dead ends: 617 [2024-11-27 20:04:45,501 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 [2024-11-27 20:04:45,501 INFO L435 NwaCegarLoop]: 898 mSDtfsCounter, 88 mSDsluCounter, 4412 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 5310 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:45,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 5310 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2024-11-27 20:04:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2024-11-27 20:04:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 487 states have (on average 1.6036960985626283) internal successors, (781), 506 states have internal predecessors, (781), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2024-11-27 20:04:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 978 transitions. [2024-11-27 20:04:45,526 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 978 transitions. Word has length 172 [2024-11-27 20:04:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:45,527 INFO L471 AbstractCegarLoop]: Abstraction has 617 states and 978 transitions. [2024-11-27 20:04:45,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:45,527 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 978 transitions. [2024-11-27 20:04:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-27 20:04:45,530 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:45,530 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:45,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-27 20:04:45,530 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:45,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1422021731, now seen corresponding path program 1 times [2024-11-27 20:04:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264750164] [2024-11-27 20:04:45,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264750164] [2024-11-27 20:04:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264750164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:45,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:04:45,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 20:04:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227048482] [2024-11-27 20:04:45,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:45,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:04:45,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:45,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:04:45,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:45,898 INFO L87 Difference]: Start difference. First operand 617 states and 978 transitions. Second operand has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:46,083 INFO L93 Difference]: Finished difference Result 1200 states and 1920 transitions. [2024-11-27 20:04:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:04:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 173 [2024-11-27 20:04:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:46,088 INFO L225 Difference]: With dead ends: 1200 [2024-11-27 20:04:46,089 INFO L226 Difference]: Without dead ends: 608 [2024-11-27 20:04:46,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:04:46,096 INFO L435 NwaCegarLoop]: 858 mSDtfsCounter, 45 mSDsluCounter, 5963 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6821 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:46,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6821 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2024-11-27 20:04:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2024-11-27 20:04:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 478 states have (on average 1.602510460251046) internal successors, (766), 497 states have internal predecessors, (766), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2024-11-27 20:04:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 963 transitions. [2024-11-27 20:04:46,123 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 963 transitions. Word has length 173 [2024-11-27 20:04:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:46,123 INFO L471 AbstractCegarLoop]: Abstraction has 608 states and 963 transitions. [2024-11-27 20:04:46,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 963 transitions. [2024-11-27 20:04:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-27 20:04:46,126 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:46,126 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:46,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-27 20:04:46,127 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:46,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1197171452, now seen corresponding path program 1 times [2024-11-27 20:04:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:46,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317545849] [2024-11-27 20:04:46,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:46,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 20:04:46,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:46,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317545849] [2024-11-27 20:04:46,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317545849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:46,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:04:46,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 20:04:46,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994129599] [2024-11-27 20:04:46,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:46,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:04:46,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:46,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:04:46,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:04:46,480 INFO L87 Difference]: Start difference. First operand 608 states and 963 transitions. Second operand has 10 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:46,658 INFO L93 Difference]: Finished difference Result 1132 states and 1826 transitions. [2024-11-27 20:04:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:04:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 174 [2024-11-27 20:04:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:46,664 INFO L225 Difference]: With dead ends: 1132 [2024-11-27 20:04:46,664 INFO L226 Difference]: Without dead ends: 602 [2024-11-27 20:04:46,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:04:46,669 INFO L435 NwaCegarLoop]: 867 mSDtfsCounter, 31 mSDsluCounter, 6888 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 7755 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:46,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 7755 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:04:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2024-11-27 20:04:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2024-11-27 20:04:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 472 states have (on average 1.6080508474576272) internal successors, (759), 491 states have internal predecessors, (759), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2024-11-27 20:04:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 956 transitions. [2024-11-27 20:04:46,694 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 956 transitions. Word has length 174 [2024-11-27 20:04:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:46,695 INFO L471 AbstractCegarLoop]: Abstraction has 602 states and 956 transitions. [2024-11-27 20:04:46,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-27 20:04:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 956 transitions. [2024-11-27 20:04:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-27 20:04:46,698 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:46,698 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:46,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-27 20:04:46,698 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:46,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash -211545534, now seen corresponding path program 1 times [2024-11-27 20:04:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760796746] [2024-11-27 20:04:46,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-27 20:04:47,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760796746] [2024-11-27 20:04:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760796746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741310898] [2024-11-27 20:04:47,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:47,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:47,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:47,166 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:47,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 20:04:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:47,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 1945 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:04:47,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-27 20:04:47,891 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:47,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741310898] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:47,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:47,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2024-11-27 20:04:47,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889035094] [2024-11-27 20:04:47,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:47,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:04:47,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:47,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:04:47,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:04:47,893 INFO L87 Difference]: Start difference. First operand 602 states and 956 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-27 20:04:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:51,572 INFO L93 Difference]: Finished difference Result 1968 states and 3230 transitions. [2024-11-27 20:04:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 20:04:51,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 174 [2024-11-27 20:04:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:51,581 INFO L225 Difference]: With dead ends: 1968 [2024-11-27 20:04:51,581 INFO L226 Difference]: Without dead ends: 1452 [2024-11-27 20:04:51,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2024-11-27 20:04:51,583 INFO L435 NwaCegarLoop]: 507 mSDtfsCounter, 2383 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 5346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:51,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2468 Valid, 2762 Invalid, 5346 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [519 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-27 20:04:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2024-11-27 20:04:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1338. [2024-11-27 20:04:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1051 states have (on average 1.6441484300666032) internal successors, (1728), 1090 states have internal predecessors, (1728), 217 states have call successors, (217), 64 states have call predecessors, (217), 69 states have return successors, (236), 209 states have call predecessors, (236), 212 states have call successors, (236) [2024-11-27 20:04:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2181 transitions. [2024-11-27 20:04:51,649 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2181 transitions. Word has length 174 [2024-11-27 20:04:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:51,650 INFO L471 AbstractCegarLoop]: Abstraction has 1338 states and 2181 transitions. [2024-11-27 20:04:51,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-27 20:04:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2181 transitions. [2024-11-27 20:04:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-27 20:04:51,653 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:51,654 INFO L218 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:51,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-27 20:04:51,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:51,854 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:51,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash -685391358, now seen corresponding path program 1 times [2024-11-27 20:04:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:51,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306805269] [2024-11-27 20:04:51,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:51,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 20:04:52,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:52,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306805269] [2024-11-27 20:04:52,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306805269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:52,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215319024] [2024-11-27 20:04:52,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:52,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:52,296 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:52,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-27 20:04:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:52,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 1941 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 20:04:52,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 20:04:52,940 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215319024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:52,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:52,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-27 20:04:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628917747] [2024-11-27 20:04:52,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:52,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:04:52,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:52,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:04:52,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:04:52,942 INFO L87 Difference]: Start difference. First operand 1338 states and 2181 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-27 20:04:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:55,679 INFO L93 Difference]: Finished difference Result 2848 states and 4685 transitions. [2024-11-27 20:04:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:04:55,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 176 [2024-11-27 20:04:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:55,692 INFO L225 Difference]: With dead ends: 2848 [2024-11-27 20:04:55,692 INFO L226 Difference]: Without dead ends: 1596 [2024-11-27 20:04:55,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:04:55,698 INFO L435 NwaCegarLoop]: 486 mSDtfsCounter, 2133 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2217 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 3946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:55,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2217 Valid, 2040 Invalid, 3946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-27 20:04:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2024-11-27 20:04:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1409. [2024-11-27 20:04:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1103 states have (on average 1.6319129646418857) internal successors, (1800), 1148 states have internal predecessors, (1800), 225 states have call successors, (225), 69 states have call predecessors, (225), 80 states have return successors, (262), 217 states have call predecessors, (262), 220 states have call successors, (262) [2024-11-27 20:04:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2287 transitions. [2024-11-27 20:04:55,775 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2287 transitions. Word has length 176 [2024-11-27 20:04:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:55,775 INFO L471 AbstractCegarLoop]: Abstraction has 1409 states and 2287 transitions. [2024-11-27 20:04:55,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-27 20:04:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2287 transitions. [2024-11-27 20:04:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-27 20:04:55,778 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:55,779 INFO L218 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:55,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-27 20:04:55,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:55,980 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:55,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2066307338, now seen corresponding path program 1 times [2024-11-27 20:04:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:55,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033861623] [2024-11-27 20:04:55,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:55,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 20:04:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:56,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033861623] [2024-11-27 20:04:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033861623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:56,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042190500] [2024-11-27 20:04:56,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:56,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:56,651 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:56,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 20:04:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:57,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 1958 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 20:04:57,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-27 20:04:57,160 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:57,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042190500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:57,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:57,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2024-11-27 20:04:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989813741] [2024-11-27 20:04:57,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:57,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:04:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:57,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:04:57,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:04:57,163 INFO L87 Difference]: Start difference. First operand 1409 states and 2287 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-27 20:04:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:57,293 INFO L93 Difference]: Finished difference Result 3431 states and 5661 transitions. [2024-11-27 20:04:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:04:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 181 [2024-11-27 20:04:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:57,324 INFO L225 Difference]: With dead ends: 3431 [2024-11-27 20:04:57,324 INFO L226 Difference]: Without dead ends: 2111 [2024-11-27 20:04:57,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:04:57,332 INFO L435 NwaCegarLoop]: 1545 mSDtfsCounter, 792 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:57,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 2418 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:04:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2024-11-27 20:04:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1405. [2024-11-27 20:04:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1101 states have (on average 1.631244323342416) internal successors, (1796), 1144 states have internal predecessors, (1796), 225 states have call successors, (225), 69 states have call predecessors, (225), 78 states have return successors, (253), 217 states have call predecessors, (253), 220 states have call successors, (253) [2024-11-27 20:04:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2274 transitions. [2024-11-27 20:04:57,466 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2274 transitions. Word has length 181 [2024-11-27 20:04:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:57,467 INFO L471 AbstractCegarLoop]: Abstraction has 1405 states and 2274 transitions. [2024-11-27 20:04:57,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-27 20:04:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2274 transitions. [2024-11-27 20:04:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-27 20:04:57,477 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:57,477 INFO L218 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:57,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-27 20:04:57,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-27 20:04:57,678 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:57,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1331266680, now seen corresponding path program 1 times [2024-11-27 20:04:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:57,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461801265] [2024-11-27 20:04:57,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 20:04:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461801265] [2024-11-27 20:04:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461801265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665807573] [2024-11-27 20:04:58,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:58,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:58,121 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:58,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 20:04:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:04:58,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 20:04:58,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:04:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 20:04:58,755 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:04:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665807573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:04:58,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:04:58,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-27 20:04:58,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632905269] [2024-11-27 20:04:58,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:04:58,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:04:58,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:04:58,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:04:58,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:04:58,757 INFO L87 Difference]: Start difference. First operand 1405 states and 2274 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-27 20:04:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:04:59,619 INFO L93 Difference]: Finished difference Result 2708 states and 4426 transitions. [2024-11-27 20:04:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:04:59,619 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), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 181 [2024-11-27 20:04:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:04:59,629 INFO L225 Difference]: With dead ends: 2708 [2024-11-27 20:04:59,629 INFO L226 Difference]: Without dead ends: 1389 [2024-11-27 20:04:59,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:04:59,634 INFO L435 NwaCegarLoop]: 306 mSDtfsCounter, 1292 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 20:04:59,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 320 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 20:04:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2024-11-27 20:04:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1389. [2024-11-27 20:04:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1091 states have (on average 1.6269477543538038) internal successors, (1775), 1133 states have internal predecessors, (1775), 219 states have call successors, (219), 69 states have call predecessors, (219), 78 states have return successors, (248), 212 states have call predecessors, (248), 215 states have call successors, (248) [2024-11-27 20:04:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 2242 transitions. [2024-11-27 20:04:59,764 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 2242 transitions. Word has length 181 [2024-11-27 20:04:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:04:59,764 INFO L471 AbstractCegarLoop]: Abstraction has 1389 states and 2242 transitions. [2024-11-27 20:04:59,765 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), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-27 20:04:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 2242 transitions. [2024-11-27 20:04:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-11-27 20:04:59,774 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:04:59,774 INFO L218 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:59,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-27 20:04:59,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-27 20:04:59,975 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:04:59,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1680549847, now seen corresponding path program 1 times [2024-11-27 20:04:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:59,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579359715] [2024-11-27 20:04:59,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:04:59,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 20:05:00,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:00,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579359715] [2024-11-27 20:05:00,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579359715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:00,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816632299] [2024-11-27 20:05:00,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:00,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:00,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:00,340 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:00,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 20:05:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:00,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 1959 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:05:00,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 20:05:00,859 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:05:00,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816632299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:05:00,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:05:00,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-27 20:05:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485599706] [2024-11-27 20:05:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:05:00,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:05:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:00,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:05:00,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:05:00,861 INFO L87 Difference]: Start difference. First operand 1389 states and 2242 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2024-11-27 20:05:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:00,996 INFO L93 Difference]: Finished difference Result 1409 states and 2266 transitions. [2024-11-27 20:05:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:05:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 182 [2024-11-27 20:05:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:01,010 INFO L225 Difference]: With dead ends: 1409 [2024-11-27 20:05:01,010 INFO L226 Difference]: Without dead ends: 1395 [2024-11-27 20:05:01,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:05:01,012 INFO L435 NwaCegarLoop]: 872 mSDtfsCounter, 0 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:01,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3473 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:05:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2024-11-27 20:05:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1395. [2024-11-27 20:05:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1097 states have (on average 1.6235186873290792) internal successors, (1781), 1139 states have internal predecessors, (1781), 219 states have call successors, (219), 69 states have call predecessors, (219), 78 states have return successors, (248), 212 states have call predecessors, (248), 215 states have call successors, (248) [2024-11-27 20:05:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2248 transitions. [2024-11-27 20:05:01,121 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2248 transitions. Word has length 182 [2024-11-27 20:05:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:01,122 INFO L471 AbstractCegarLoop]: Abstraction has 1395 states and 2248 transitions. [2024-11-27 20:05:01,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2024-11-27 20:05:01,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2248 transitions. [2024-11-27 20:05:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-27 20:05:01,126 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:01,126 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-27 20:05:01,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-27 20:05:01,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-27 20:05:01,327 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:01,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash -451313624, now seen corresponding path program 1 times [2024-11-27 20:05:01,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:01,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607143411] [2024-11-27 20:05:01,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:01,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-11-27 20:05:01,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607143411] [2024-11-27 20:05:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607143411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244563786] [2024-11-27 20:05:01,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:01,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:01,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:01,801 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:01,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-27 20:05:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:02,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:05:02,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 32 proven. 88 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-27 20:05:02,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:05:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-27 20:05:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244563786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:05:03,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:05:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-11-27 20:05:03,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403594574] [2024-11-27 20:05:03,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:05:03,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:05:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:03,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:05:03,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:05:03,023 INFO L87 Difference]: Start difference. First operand 1395 states and 2248 transitions. Second operand has 14 states, 14 states have (on average 19.071428571428573) internal successors, (267), 12 states have internal predecessors, (267), 9 states have call successors, (59), 6 states have call predecessors, (59), 8 states have return successors, (58), 11 states have call predecessors, (58), 8 states have call successors, (58) [2024-11-27 20:05:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:14,018 INFO L93 Difference]: Finished difference Result 10312 states and 17281 transitions. [2024-11-27 20:05:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-27 20:05:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.071428571428573) internal successors, (267), 12 states have internal predecessors, (267), 9 states have call successors, (59), 6 states have call predecessors, (59), 8 states have return successors, (58), 11 states have call predecessors, (58), 8 states have call successors, (58) Word has length 271 [2024-11-27 20:05:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:14,069 INFO L225 Difference]: With dead ends: 10312 [2024-11-27 20:05:14,069 INFO L226 Difference]: Without dead ends: 9003 [2024-11-27 20:05:14,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 560 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=653, Invalid=4177, Unknown=0, NotChecked=0, Total=4830 [2024-11-27 20:05:14,086 INFO L435 NwaCegarLoop]: 823 mSDtfsCounter, 8095 mSDsluCounter, 5579 mSDsCounter, 0 mSdLazyCounter, 14951 mSolverCounterSat, 2550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8177 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 17501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2550 IncrementalHoareTripleChecker+Valid, 14951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:14,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8177 Valid, 6402 Invalid, 17501 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2550 Valid, 14951 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2024-11-27 20:05:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9003 states. [2024-11-27 20:05:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9003 to 7825. [2024-11-27 20:05:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 6033 states have (on average 1.603016741256423) internal successors, (9671), 6285 states have internal predecessors, (9671), 1304 states have call successors, (1304), 330 states have call predecessors, (1304), 487 states have return successors, (1922), 1301 states have call predecessors, (1922), 1300 states have call successors, (1922) [2024-11-27 20:05:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 12897 transitions. [2024-11-27 20:05:14,793 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 12897 transitions. Word has length 271 [2024-11-27 20:05:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:14,794 INFO L471 AbstractCegarLoop]: Abstraction has 7825 states and 12897 transitions. [2024-11-27 20:05:14,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.071428571428573) internal successors, (267), 12 states have internal predecessors, (267), 9 states have call successors, (59), 6 states have call predecessors, (59), 8 states have return successors, (58), 11 states have call predecessors, (58), 8 states have call successors, (58) [2024-11-27 20:05:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 12897 transitions. [2024-11-27 20:05:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2024-11-27 20:05:14,815 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:14,815 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-27 20:05:14,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-27 20:05:15,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-27 20:05:15,016 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:15,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash 457587297, now seen corresponding path program 1 times [2024-11-27 20:05:15,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:15,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867087788] [2024-11-27 20:05:15,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-27 20:05:15,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:15,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867087788] [2024-11-27 20:05:15,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867087788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:05:15,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:05:15,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:05:15,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918119848] [2024-11-27 20:05:15,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:05:15,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:05:15,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:15,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:05:15,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:05:15,322 INFO L87 Difference]: Start difference. First operand 7825 states and 12897 transitions. Second operand has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2024-11-27 20:05:15,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:15,881 INFO L93 Difference]: Finished difference Result 15573 states and 25702 transitions. [2024-11-27 20:05:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:05:15,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 273 [2024-11-27 20:05:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:15,926 INFO L225 Difference]: With dead ends: 15573 [2024-11-27 20:05:15,927 INFO L226 Difference]: Without dead ends: 7816 [2024-11-27 20:05:15,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:05:15,952 INFO L435 NwaCegarLoop]: 860 mSDtfsCounter, 41 mSDsluCounter, 5108 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 5968 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:15,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 5968 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:05:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7816 states. [2024-11-27 20:05:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7816 to 7816. [2024-11-27 20:05:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7816 states, 6026 states have (on average 1.6025555924327912) internal successors, (9657), 6277 states have internal predecessors, (9657), 1304 states have call successors, (1304), 330 states have call predecessors, (1304), 485 states have return successors, (1918), 1300 states have call predecessors, (1918), 1300 states have call successors, (1918) [2024-11-27 20:05:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 12879 transitions. [2024-11-27 20:05:16,583 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 12879 transitions. Word has length 273 [2024-11-27 20:05:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:16,584 INFO L471 AbstractCegarLoop]: Abstraction has 7816 states and 12879 transitions. [2024-11-27 20:05:16,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2024-11-27 20:05:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 12879 transitions. [2024-11-27 20:05:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-11-27 20:05:16,601 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:16,602 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-27 20:05:16,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-27 20:05:16,602 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:16,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1105221716, now seen corresponding path program 1 times [2024-11-27 20:05:16,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:16,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313326041] [2024-11-27 20:05:16,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:16,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-27 20:05:16,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:16,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313326041] [2024-11-27 20:05:16,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313326041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:16,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141255126] [2024-11-27 20:05:16,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:16,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:16,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:16,884 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:16,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-27 20:05:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:17,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 2417 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:05:17,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-27 20:05:17,434 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:05:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141255126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:05:17,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:05:17,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-27 20:05:17,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190019317] [2024-11-27 20:05:17,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:05:17,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:05:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:17,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:05:17,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:05:17,439 INFO L87 Difference]: Start difference. First operand 7816 states and 12879 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-27 20:05:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:17,682 INFO L93 Difference]: Finished difference Result 10241 states and 16831 transitions. [2024-11-27 20:05:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:05:17,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 274 [2024-11-27 20:05:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:17,694 INFO L225 Difference]: With dead ends: 10241 [2024-11-27 20:05:17,694 INFO L226 Difference]: Without dead ends: 2465 [2024-11-27 20:05:17,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:05:17,716 INFO L435 NwaCegarLoop]: 849 mSDtfsCounter, 3 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:17,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2540 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:05:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2024-11-27 20:05:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2465. [2024-11-27 20:05:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 1928 states have (on average 1.6026970954356847) internal successors, (3090), 2006 states have internal predecessors, (3090), 381 states have call successors, (381), 114 states have call predecessors, (381), 155 states have return successors, (523), 368 states have call predecessors, (523), 377 states have call successors, (523) [2024-11-27 20:05:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3994 transitions. [2024-11-27 20:05:17,880 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3994 transitions. Word has length 274 [2024-11-27 20:05:17,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:17,880 INFO L471 AbstractCegarLoop]: Abstraction has 2465 states and 3994 transitions. [2024-11-27 20:05:17,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2024-11-27 20:05:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3994 transitions. [2024-11-27 20:05:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2024-11-27 20:05:17,885 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:17,886 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:05:17,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-27 20:05:18,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-27 20:05:18,087 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:18,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1782205969, now seen corresponding path program 1 times [2024-11-27 20:05:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407301263] [2024-11-27 20:05:18,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2024-11-27 20:05:18,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:18,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407301263] [2024-11-27 20:05:18,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407301263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:18,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713704304] [2024-11-27 20:05:18,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:18,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:18,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:18,714 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:18,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-27 20:05:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:19,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 2435 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:05:19,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-27 20:05:19,392 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:05:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713704304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:05:19,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:05:19,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2024-11-27 20:05:19,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96661862] [2024-11-27 20:05:19,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:05:19,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:05:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:19,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:05:19,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:05:19,393 INFO L87 Difference]: Start difference. First operand 2465 states and 3994 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2024-11-27 20:05:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:19,565 INFO L93 Difference]: Finished difference Result 4866 states and 7933 transitions. [2024-11-27 20:05:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:05:19,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 277 [2024-11-27 20:05:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:19,586 INFO L225 Difference]: With dead ends: 4866 [2024-11-27 20:05:19,587 INFO L226 Difference]: Without dead ends: 2485 [2024-11-27 20:05:19,597 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:05:19,598 INFO L435 NwaCegarLoop]: 861 mSDtfsCounter, 0 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4298 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:19,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4298 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:05:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2024-11-27 20:05:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2479. [2024-11-27 20:05:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 1938 states have (on average 1.5995872033023735) internal successors, (3100), 2018 states have internal predecessors, (3100), 381 states have call successors, (381), 114 states have call predecessors, (381), 159 states have return successors, (527), 370 states have call predecessors, (527), 377 states have call successors, (527) [2024-11-27 20:05:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 4008 transitions. [2024-11-27 20:05:19,864 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 4008 transitions. Word has length 277 [2024-11-27 20:05:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:19,866 INFO L471 AbstractCegarLoop]: Abstraction has 2479 states and 4008 transitions. [2024-11-27 20:05:19,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2024-11-27 20:05:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 4008 transitions. [2024-11-27 20:05:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2024-11-27 20:05:19,873 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:19,873 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:05:19,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-27 20:05:20,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-27 20:05:20,074 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:20,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1592693997, now seen corresponding path program 1 times [2024-11-27 20:05:20,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:20,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548994655] [2024-11-27 20:05:20,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:20,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-27 20:05:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548994655] [2024-11-27 20:05:20,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548994655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697908857] [2024-11-27 20:05:20,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:20,399 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:20,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-27 20:05:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:21,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:05:21,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2024-11-27 20:05:21,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:05:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-27 20:05:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697908857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:05:22,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:05:22,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 11] total 18 [2024-11-27 20:05:22,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153994948] [2024-11-27 20:05:22,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:05:22,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:05:22,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:22,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:05:22,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:05:22,366 INFO L87 Difference]: Start difference. First operand 2479 states and 4008 transitions. Second operand has 18 states, 18 states have (on average 16.333333333333332) internal successors, (294), 18 states have internal predecessors, (294), 12 states have call successors, (62), 7 states have call predecessors, (62), 10 states have return successors, (63), 14 states have call predecessors, (63), 11 states have call successors, (63) [2024-11-27 20:05:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:34,390 INFO L93 Difference]: Finished difference Result 12580 states and 20576 transitions. [2024-11-27 20:05:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2024-11-27 20:05:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 16.333333333333332) internal successors, (294), 18 states have internal predecessors, (294), 12 states have call successors, (62), 7 states have call predecessors, (62), 10 states have return successors, (63), 14 states have call predecessors, (63), 11 states have call successors, (63) Word has length 283 [2024-11-27 20:05:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:34,432 INFO L225 Difference]: With dead ends: 12580 [2024-11-27 20:05:34,433 INFO L226 Difference]: Without dead ends: 9629 [2024-11-27 20:05:34,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 608 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2332, Invalid=14180, Unknown=0, NotChecked=0, Total=16512 [2024-11-27 20:05:34,449 INFO L435 NwaCegarLoop]: 808 mSDtfsCounter, 13984 mSDsluCounter, 6150 mSDsCounter, 0 mSdLazyCounter, 11140 mSolverCounterSat, 4445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14022 SdHoareTripleChecker+Valid, 6958 SdHoareTripleChecker+Invalid, 15585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4445 IncrementalHoareTripleChecker+Valid, 11140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:34,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14022 Valid, 6958 Invalid, 15585 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4445 Valid, 11140 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2024-11-27 20:05:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9629 states. [2024-11-27 20:05:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9629 to 9167. [2024-11-27 20:05:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9167 states, 6964 states have (on average 1.5528431935669156) internal successors, (10814), 7310 states have internal predecessors, (10814), 1599 states have call successors, (1599), 468 states have call predecessors, (1599), 603 states have return successors, (2169), 1580 states have call predecessors, (2169), 1595 states have call successors, (2169) [2024-11-27 20:05:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9167 states to 9167 states and 14582 transitions. [2024-11-27 20:05:35,157 INFO L78 Accepts]: Start accepts. Automaton has 9167 states and 14582 transitions. Word has length 283 [2024-11-27 20:05:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:35,157 INFO L471 AbstractCegarLoop]: Abstraction has 9167 states and 14582 transitions. [2024-11-27 20:05:35,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.333333333333332) internal successors, (294), 18 states have internal predecessors, (294), 12 states have call successors, (62), 7 states have call predecessors, (62), 10 states have return successors, (63), 14 states have call predecessors, (63), 11 states have call successors, (63) [2024-11-27 20:05:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9167 states and 14582 transitions. [2024-11-27 20:05:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2024-11-27 20:05:35,162 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:35,162 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 4, 3, 3, 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] [2024-11-27 20:05:35,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-27 20:05:35,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-27 20:05:35,363 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:35,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash -623486020, now seen corresponding path program 1 times [2024-11-27 20:05:35,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:35,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349426602] [2024-11-27 20:05:35,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:35,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-27 20:05:35,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:35,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349426602] [2024-11-27 20:05:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349426602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:35,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347523932] [2024-11-27 20:05:35,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:35,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:35,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:35,858 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:35,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-27 20:05:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:36,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:05:36,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 92 proven. 9 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-27 20:05:36,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:05:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2024-11-27 20:05:37,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347523932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:05:37,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:05:37,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 23 [2024-11-27 20:05:37,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167507670] [2024-11-27 20:05:37,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:05:37,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 20:05:37,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:37,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 20:05:37,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:05:37,343 INFO L87 Difference]: Start difference. First operand 9167 states and 14582 transitions. Second operand has 23 states, 23 states have (on average 13.565217391304348) internal successors, (312), 19 states have internal predecessors, (312), 11 states have call successors, (61), 6 states have call predecessors, (61), 14 states have return successors, (62), 15 states have call predecessors, (62), 10 states have call successors, (62) [2024-11-27 20:05:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:46,636 INFO L93 Difference]: Finished difference Result 29689 states and 47886 transitions. [2024-11-27 20:05:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 20:05:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 13.565217391304348) internal successors, (312), 19 states have internal predecessors, (312), 11 states have call successors, (61), 6 states have call predecessors, (61), 14 states have return successors, (62), 15 states have call predecessors, (62), 10 states have call successors, (62) Word has length 234 [2024-11-27 20:05:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:46,772 INFO L225 Difference]: With dead ends: 29689 [2024-11-27 20:05:46,772 INFO L226 Difference]: Without dead ends: 20609 [2024-11-27 20:05:46,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 469 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-11-27 20:05:46,826 INFO L435 NwaCegarLoop]: 800 mSDtfsCounter, 7201 mSDsluCounter, 7542 mSDsCounter, 0 mSdLazyCounter, 15015 mSolverCounterSat, 2168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7201 SdHoareTripleChecker+Valid, 8342 SdHoareTripleChecker+Invalid, 17183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2168 IncrementalHoareTripleChecker+Valid, 15015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:46,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7201 Valid, 8342 Invalid, 17183 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2168 Valid, 15015 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-27 20:05:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2024-11-27 20:05:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 19987. [2024-11-27 20:05:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19987 states, 14972 states have (on average 1.5476222281592307) internal successors, (23171), 15739 states have internal predecessors, (23171), 3796 states have call successors, (3796), 908 states have call predecessors, (3796), 1218 states have return successors, (5249), 3803 states have call predecessors, (5249), 3792 states have call successors, (5249) [2024-11-27 20:05:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19987 states to 19987 states and 32216 transitions. [2024-11-27 20:05:48,655 INFO L78 Accepts]: Start accepts. Automaton has 19987 states and 32216 transitions. Word has length 234 [2024-11-27 20:05:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:48,656 INFO L471 AbstractCegarLoop]: Abstraction has 19987 states and 32216 transitions. [2024-11-27 20:05:48,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.565217391304348) internal successors, (312), 19 states have internal predecessors, (312), 11 states have call successors, (61), 6 states have call predecessors, (61), 14 states have return successors, (62), 15 states have call predecessors, (62), 10 states have call successors, (62) [2024-11-27 20:05:48,656 INFO L276 IsEmpty]: Start isEmpty. Operand 19987 states and 32216 transitions. [2024-11-27 20:05:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-27 20:05:48,666 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:48,666 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:05:48,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-27 20:05:48,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-27 20:05:48,866 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:48,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1698919639, now seen corresponding path program 1 times [2024-11-27 20:05:48,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:48,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23607778] [2024-11-27 20:05:48,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:48,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-11-27 20:05:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23607778] [2024-11-27 20:05:49,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23607778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:05:49,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:05:49,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:05:49,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105886199] [2024-11-27 20:05:49,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:05:49,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:05:49,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:49,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:05:49,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:05:49,191 INFO L87 Difference]: Start difference. First operand 19987 states and 32216 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 5 states have internal predecessors, (137), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2024-11-27 20:05:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:50,563 INFO L93 Difference]: Finished difference Result 39997 states and 64808 transitions. [2024-11-27 20:05:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:05:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 5 states have internal predecessors, (137), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 238 [2024-11-27 20:05:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:50,678 INFO L225 Difference]: With dead ends: 39997 [2024-11-27 20:05:50,678 INFO L226 Difference]: Without dead ends: 20147 [2024-11-27 20:05:50,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:05:50,751 INFO L435 NwaCegarLoop]: 857 mSDtfsCounter, 0 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4254 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:50,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4254 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:05:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20147 states. [2024-11-27 20:05:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20147 to 20099. [2024-11-27 20:05:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20099 states, 15084 states have (on average 1.5414346327234156) internal successors, (23251), 15823 states have internal predecessors, (23251), 3768 states have call successors, (3768), 908 states have call predecessors, (3768), 1246 states have return successors, (5341), 3831 states have call predecessors, (5341), 3764 states have call successors, (5341) [2024-11-27 20:05:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20099 states to 20099 states and 32360 transitions. [2024-11-27 20:05:52,335 INFO L78 Accepts]: Start accepts. Automaton has 20099 states and 32360 transitions. Word has length 238 [2024-11-27 20:05:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:52,335 INFO L471 AbstractCegarLoop]: Abstraction has 20099 states and 32360 transitions. [2024-11-27 20:05:52,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 5 states have internal predecessors, (137), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2024-11-27 20:05:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20099 states and 32360 transitions. [2024-11-27 20:05:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2024-11-27 20:05:52,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:52,342 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:05:52,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-11-27 20:05:52,342 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:52,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1235242611, now seen corresponding path program 1 times [2024-11-27 20:05:52,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:52,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737007939] [2024-11-27 20:05:52,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:52,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-27 20:05:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737007939] [2024-11-27 20:05:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737007939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871446882] [2024-11-27 20:05:52,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:52,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:52,927 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:52,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-27 20:05:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:53,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:05:53,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-27 20:05:53,593 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:05:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871446882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:05:53,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:05:53,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2024-11-27 20:05:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74924121] [2024-11-27 20:05:53,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:05:53,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:05:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:53,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:05:53,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:05:53,595 INFO L87 Difference]: Start difference. First operand 20099 states and 32360 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2024-11-27 20:05:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:05:55,715 INFO L93 Difference]: Finished difference Result 40778 states and 66396 transitions. [2024-11-27 20:05:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:05:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 313 [2024-11-27 20:05:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:05:55,945 INFO L225 Difference]: With dead ends: 40778 [2024-11-27 20:05:55,945 INFO L226 Difference]: Without dead ends: 20819 [2024-11-27 20:05:56,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:05:56,061 INFO L435 NwaCegarLoop]: 799 mSDtfsCounter, 144 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:05:56,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2374 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:05:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20819 states. [2024-11-27 20:05:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20819 to 20723. [2024-11-27 20:05:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20723 states, 15692 states have (on average 1.5561432577109355) internal successors, (24419), 16431 states have internal predecessors, (24419), 3768 states have call successors, (3768), 924 states have call predecessors, (3768), 1262 states have return successors, (5341), 3831 states have call predecessors, (5341), 3764 states have call successors, (5341) [2024-11-27 20:05:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20723 states to 20723 states and 33528 transitions. [2024-11-27 20:05:57,826 INFO L78 Accepts]: Start accepts. Automaton has 20723 states and 33528 transitions. Word has length 313 [2024-11-27 20:05:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:05:57,826 INFO L471 AbstractCegarLoop]: Abstraction has 20723 states and 33528 transitions. [2024-11-27 20:05:57,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2024-11-27 20:05:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20723 states and 33528 transitions. [2024-11-27 20:05:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2024-11-27 20:05:57,838 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:05:57,838 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:05:57,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-27 20:05:58,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-27 20:05:58,039 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:05:58,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:05:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -78377571, now seen corresponding path program 1 times [2024-11-27 20:05:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:05:58,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920757888] [2024-11-27 20:05:58,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:58,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:05:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-11-27 20:05:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:05:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920757888] [2024-11-27 20:05:58,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920757888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:05:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429421524] [2024-11-27 20:05:58,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:05:58,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:05:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:05:58,306 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:05:58,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-27 20:05:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:05:58,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:05:58,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:05:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-27 20:05:58,886 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:05:58,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429421524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:05:58,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:05:58,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2024-11-27 20:05:58,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193651114] [2024-11-27 20:05:58,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:05:58,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:05:58,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:05:58,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:05:58,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:05:58,888 INFO L87 Difference]: Start difference. First operand 20723 states and 33528 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-27 20:06:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:06:01,734 INFO L93 Difference]: Finished difference Result 60853 states and 100408 transitions. [2024-11-27 20:06:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:06:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 245 [2024-11-27 20:06:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:06:01,991 INFO L225 Difference]: With dead ends: 60853 [2024-11-27 20:06:01,991 INFO L226 Difference]: Without dead ends: 40227 [2024-11-27 20:06:02,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:06:02,284 INFO L435 NwaCegarLoop]: 1296 mSDtfsCounter, 702 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:06:02,284 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 2150 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:06:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40227 states. [2024-11-27 20:06:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40227 to 40179. [2024-11-27 20:06:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40179 states, 30351 states have (on average 1.552172910283022) internal successors, (47110), 31807 states have internal predecessors, (47110), 7384 states have call successors, (7384), 1784 states have call predecessors, (7384), 2443 states have return successors, (11582), 7515 states have call predecessors, (11582), 7380 states have call successors, (11582) [2024-11-27 20:06:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40179 states to 40179 states and 66076 transitions. [2024-11-27 20:06:05,694 INFO L78 Accepts]: Start accepts. Automaton has 40179 states and 66076 transitions. Word has length 245 [2024-11-27 20:06:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:06:05,695 INFO L471 AbstractCegarLoop]: Abstraction has 40179 states and 66076 transitions. [2024-11-27 20:06:05,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-27 20:06:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 40179 states and 66076 transitions. [2024-11-27 20:06:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2024-11-27 20:06:05,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:06:05,722 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:06:05,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-27 20:06:05,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-27 20:06:05,922 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:06:05,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:06:05,923 INFO L85 PathProgramCache]: Analyzing trace with hash -302364728, now seen corresponding path program 1 times [2024-11-27 20:06:05,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:06:05,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539948385] [2024-11-27 20:06:05,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:05,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:06:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-27 20:06:06,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:06:06,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539948385] [2024-11-27 20:06:06,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539948385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:06:06,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238002218] [2024-11-27 20:06:06,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:06:06,453 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:06:06,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996cff1-79e6-406c-9843-6e5253953468/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-27 20:06:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:07,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:06:07,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:06:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-27 20:06:07,120 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:06:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238002218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:06:07,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:06:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2024-11-27 20:06:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94567755] [2024-11-27 20:06:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:06:07,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:06:07,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:06:07,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:06:07,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:06:07,123 INFO L87 Difference]: Start difference. First operand 40179 states and 66076 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 2 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2024-11-27 20:06:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:06:10,734 INFO L93 Difference]: Finished difference Result 81742 states and 135800 transitions. [2024-11-27 20:06:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:06:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 2 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 318 [2024-11-27 20:06:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:06:11,084 INFO L225 Difference]: With dead ends: 81742 [2024-11-27 20:06:11,085 INFO L226 Difference]: Without dead ends: 41715 [2024-11-27 20:06:11,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:06:11,283 INFO L435 NwaCegarLoop]: 798 mSDtfsCounter, 142 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:06:11,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 2371 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:06:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41715 states.