./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu --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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:35,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:35,128 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:35,134 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:35,135 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:35,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:35,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:35,162 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:35,163 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:35,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:35,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:35,165 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:35,165 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:35,166 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:35,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:35,167 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:35,168 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:35,168 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:35,169 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:35,169 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:35,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:35,171 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:35,171 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:35,172 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:35,172 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:35,173 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:35,173 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:35,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:35,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:35,174 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:35,175 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:35,175 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:35,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:35,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:35,176 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:35,176 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:35,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:35,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:35,177 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:35,177 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2023-11-19 08:05:35,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:35,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:35,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:35,553 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:35,554 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:35,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-19 08:05:38,726 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:38,951 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:38,951 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-19 08:05:38,959 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/data/f3059954e/7d8b6f45ffb747368ead3f1e309e1ede/FLAG06500a034 [2023-11-19 08:05:38,974 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/data/f3059954e/7d8b6f45ffb747368ead3f1e309e1ede [2023-11-19 08:05:38,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:38,979 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:38,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:38,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:38,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:38,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:38" (1/1) ... [2023-11-19 08:05:38,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ecfaa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:38, skipping insertion in model container [2023-11-19 08:05:38,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:38" (1/1) ... [2023-11-19 08:05:39,012 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:39,177 WARN L240 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_19f229f9-e76f-4364-90e0-8e549046e944/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-19 08:05:39,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:39,213 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:39,229 WARN L240 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_19f229f9-e76f-4364-90e0-8e549046e944/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-19 08:05:39,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:39,265 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:39,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39 WrapperNode [2023-11-19 08:05:39,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:39,268 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:39,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:39,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:39,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,321 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-11-19 08:05:39,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:39,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:39,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:39,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:39,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,335 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,335 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,342 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,347 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:39,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:39,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:39,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:39,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (1/1) ... [2023-11-19 08:05:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:39,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:39,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:39,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:05:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:05:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:05:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 08:05:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 08:05:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:05:39,567 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:39,569 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:39,911 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:39,936 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:39,936 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-19 08:05:39,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:39 BoogieIcfgContainer [2023-11-19 08:05:39,945 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:39,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:39,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:39,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:39,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:38" (1/3) ... [2023-11-19 08:05:39,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adb7eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:39, skipping insertion in model container [2023-11-19 08:05:39,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:39" (2/3) ... [2023-11-19 08:05:39,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adb7eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:39, skipping insertion in model container [2023-11-19 08:05:39,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:39" (3/3) ... [2023-11-19 08:05:39,956 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2023-11-19 08:05:39,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:39,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:05:40,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:40,045 INFO L357 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, mHoare=true, 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;@46f9fadd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:40,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:05:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 08:05:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 08:05:40,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:40,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:40,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:40,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2023-11-19 08:05:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:40,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398205599] [2023-11-19 08:05:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:40,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:40,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398205599] [2023-11-19 08:05:40,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398205599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:40,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:40,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:40,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221650080] [2023-11-19 08:05:40,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:40,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:40,402 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:40,555 INFO L93 Difference]: Finished difference Result 96 states and 155 transitions. [2023-11-19 08:05:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 08:05:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:40,567 INFO L225 Difference]: With dead ends: 96 [2023-11-19 08:05:40,567 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 08:05:40,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:40,575 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:40,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 73 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:05:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 08:05:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2023-11-19 08:05:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 08:05:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-11-19 08:05:40,623 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 12 [2023-11-19 08:05:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:40,623 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-11-19 08:05:40,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-11-19 08:05:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 08:05:40,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:40,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:40,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:05:40,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:40,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2023-11-19 08:05:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:40,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206887320] [2023-11-19 08:05:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:40,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206887320] [2023-11-19 08:05:40,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206887320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:40,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048116548] [2023-11-19 08:05:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:40,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:40,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:40,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:40,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:05:40,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:05:40,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:40,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048116548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:40,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:05:40,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 08:05:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102477290] [2023-11-19 08:05:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:40,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:40,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:40,882 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:40,964 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2023-11-19 08:05:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 08:05:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:40,970 INFO L225 Difference]: With dead ends: 86 [2023-11-19 08:05:40,970 INFO L226 Difference]: Without dead ends: 55 [2023-11-19 08:05:40,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:40,973 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:40,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-19 08:05:40,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2023-11-19 08:05:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 08:05:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2023-11-19 08:05:40,990 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2023-11-19 08:05:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:40,991 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2023-11-19 08:05:40,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2023-11-19 08:05:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 08:05:40,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:40,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:41,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:41,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:41,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:41,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash -107558025, now seen corresponding path program 1 times [2023-11-19 08:05:41,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:41,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135137809] [2023-11-19 08:05:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:41,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:41,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:41,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135137809] [2023-11-19 08:05:41,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135137809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:41,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667972138] [2023-11-19 08:05:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:41,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:41,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:41,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:05:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:41,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:05:41,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:41,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667972138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:41,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:41,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:05:41,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408173098] [2023-11-19 08:05:41,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:41,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:41,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:41,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:41,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:41,538 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:41,696 INFO L93 Difference]: Finished difference Result 151 states and 212 transitions. [2023-11-19 08:05:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 08:05:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:41,700 INFO L225 Difference]: With dead ends: 151 [2023-11-19 08:05:41,702 INFO L226 Difference]: Without dead ends: 114 [2023-11-19 08:05:41,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:41,705 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 105 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:41,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:05:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-19 08:05:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-19 08:05:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 103 states have internal predecessors, (139), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 08:05:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2023-11-19 08:05:41,737 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 157 transitions. Word has length 16 [2023-11-19 08:05:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:41,738 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 157 transitions. [2023-11-19 08:05:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 157 transitions. [2023-11-19 08:05:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 08:05:41,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:41,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:41,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:41,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:41,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:41,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2071104259, now seen corresponding path program 2 times [2023-11-19 08:05:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:41,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857558300] [2023-11-19 08:05:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:41,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 08:05:42,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:42,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857558300] [2023-11-19 08:05:42,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857558300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:42,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:42,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:42,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061130235] [2023-11-19 08:05:42,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:42,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:42,092 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:42,158 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2023-11-19 08:05:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-19 08:05:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:42,160 INFO L225 Difference]: With dead ends: 212 [2023-11-19 08:05:42,160 INFO L226 Difference]: Without dead ends: 118 [2023-11-19 08:05:42,162 INFO L412 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 [2023-11-19 08:05:42,163 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:42,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 93 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-19 08:05:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2023-11-19 08:05:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 states have internal predecessors, (140), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 08:05:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2023-11-19 08:05:42,178 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 22 [2023-11-19 08:05:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:42,179 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2023-11-19 08:05:42,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2023-11-19 08:05:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 08:05:42,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:42,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:05:42,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:42,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2023-11-19 08:05:42,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:42,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153364782] [2023-11-19 08:05:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:42,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 08:05:42,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:42,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153364782] [2023-11-19 08:05:42,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153364782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:42,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192648656] [2023-11-19 08:05:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:42,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:42,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:42,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:42,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:05:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:42,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:05:42,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:05:42,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:05:42,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192648656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:42,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:42,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-19 08:05:42,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913987340] [2023-11-19 08:05:42,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:05:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:05:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:05:42,541 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:42,888 INFO L93 Difference]: Finished difference Result 376 states and 540 transitions. [2023-11-19 08:05:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 08:05:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-19 08:05:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:42,893 INFO L225 Difference]: With dead ends: 376 [2023-11-19 08:05:42,893 INFO L226 Difference]: Without dead ends: 272 [2023-11-19 08:05:42,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:05:42,900 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 369 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:42,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 293 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:05:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-19 08:05:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2023-11-19 08:05:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 242 states have internal predecessors, (327), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-19 08:05:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 369 transitions. [2023-11-19 08:05:43,001 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 369 transitions. Word has length 25 [2023-11-19 08:05:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:43,002 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 369 transitions. [2023-11-19 08:05:43,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 369 transitions. [2023-11-19 08:05:43,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 08:05:43,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:43,012 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:43,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:43,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:43,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash -34194041, now seen corresponding path program 2 times [2023-11-19 08:05:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532572075] [2023-11-19 08:05:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:43,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-19 08:05:43,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:43,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532572075] [2023-11-19 08:05:43,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532572075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:43,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:43,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820664789] [2023-11-19 08:05:43,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:43,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:43,451 INFO L87 Difference]: Start difference. First operand 265 states and 369 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:43,524 INFO L93 Difference]: Finished difference Result 485 states and 684 transitions. [2023-11-19 08:05:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-19 08:05:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:43,527 INFO L225 Difference]: With dead ends: 485 [2023-11-19 08:05:43,528 INFO L226 Difference]: Without dead ends: 260 [2023-11-19 08:05:43,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:43,532 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:43,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-19 08:05:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-19 08:05:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 238 states have internal predecessors, (321), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-19 08:05:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 361 transitions. [2023-11-19 08:05:43,583 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 361 transitions. Word has length 40 [2023-11-19 08:05:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:43,584 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 361 transitions. [2023-11-19 08:05:43,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 361 transitions. [2023-11-19 08:05:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 08:05:43,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:43,592 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:43,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:05:43,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:43,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:43,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1753085294, now seen corresponding path program 1 times [2023-11-19 08:05:43,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:43,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865508069] [2023-11-19 08:05:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:43,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:43,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865508069] [2023-11-19 08:05:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865508069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852199795] [2023-11-19 08:05:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:43,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:43,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:43,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:43,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:05:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:44,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:05:44,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:44,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:44,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852199795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:44,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:44,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-19 08:05:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576051284] [2023-11-19 08:05:44,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:05:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:05:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:05:44,347 INFO L87 Difference]: Start difference. First operand 260 states and 361 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:45,059 INFO L93 Difference]: Finished difference Result 785 states and 1130 transitions. [2023-11-19 08:05:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:05:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-19 08:05:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:45,065 INFO L225 Difference]: With dead ends: 785 [2023-11-19 08:05:45,065 INFO L226 Difference]: Without dead ends: 548 [2023-11-19 08:05:45,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:05:45,068 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1359 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:45,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 397 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:05:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-19 08:05:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2023-11-19 08:05:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 502 states have (on average 1.3565737051792828) internal successors, (681), 502 states have internal predecessors, (681), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-19 08:05:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 769 transitions. [2023-11-19 08:05:45,108 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 769 transitions. Word has length 41 [2023-11-19 08:05:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:45,109 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 769 transitions. [2023-11-19 08:05:45,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 769 transitions. [2023-11-19 08:05:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 08:05:45,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:45,111 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:45,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 08:05:45,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:05:45,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:45,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:45,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1772381526, now seen corresponding path program 2 times [2023-11-19 08:05:45,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:45,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748999210] [2023-11-19 08:05:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:45,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:46,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748999210] [2023-11-19 08:05:46,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748999210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:46,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742418380] [2023-11-19 08:05:46,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:05:46,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:46,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:46,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:05:46,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:05:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:46,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 08:05:46,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:46,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:47,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742418380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:47,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:47,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-19 08:05:47,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258423639] [2023-11-19 08:05:47,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:47,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-19 08:05:47,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-19 08:05:47,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 08:05:47,275 INFO L87 Difference]: Start difference. First operand 548 states and 769 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:49,309 INFO L93 Difference]: Finished difference Result 1625 states and 2354 transitions. [2023-11-19 08:05:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 08:05:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-19 08:05:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:49,318 INFO L225 Difference]: With dead ends: 1625 [2023-11-19 08:05:49,319 INFO L226 Difference]: Without dead ends: 1124 [2023-11-19 08:05:49,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 08:05:49,322 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2368 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:49,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 809 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 08:05:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2023-11-19 08:05:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2023-11-19 08:05:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1030 states have (on average 1.3601941747572817) internal successors, (1401), 1030 states have internal predecessors, (1401), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-19 08:05:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1585 transitions. [2023-11-19 08:05:49,387 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1585 transitions. Word has length 65 [2023-11-19 08:05:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:49,387 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1585 transitions. [2023-11-19 08:05:49,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1585 transitions. [2023-11-19 08:05:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-19 08:05:49,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:49,389 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:49,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:49,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:05:49,611 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:49,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1315726042, now seen corresponding path program 3 times [2023-11-19 08:05:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:49,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178600006] [2023-11-19 08:05:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:52,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178600006] [2023-11-19 08:05:52,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178600006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570404764] [2023-11-19 08:05:52,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:05:52,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:52,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:52,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:05:52,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:05:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:52,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:05:52,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2023-11-19 08:05:52,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:52,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570404764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:52,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:05:52,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [49] total 53 [2023-11-19 08:05:52,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536245002] [2023-11-19 08:05:52,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:52,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:05:52,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:05:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 08:05:52,407 INFO L87 Difference]: Start difference. First operand 1124 states and 1585 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:52,545 INFO L93 Difference]: Finished difference Result 2152 states and 3073 transitions. [2023-11-19 08:05:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-11-19 08:05:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:52,557 INFO L225 Difference]: With dead ends: 2152 [2023-11-19 08:05:52,557 INFO L226 Difference]: Without dead ends: 1139 [2023-11-19 08:05:52,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1424, Invalid=1438, Unknown=0, NotChecked=0, Total=2862 [2023-11-19 08:05:52,562 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 33 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:52,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:05:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2023-11-19 08:05:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1126. [2023-11-19 08:05:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1032 states have (on average 1.3604651162790697) internal successors, (1404), 1032 states have internal predecessors, (1404), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-19 08:05:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1588 transitions. [2023-11-19 08:05:52,655 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1588 transitions. Word has length 113 [2023-11-19 08:05:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:52,655 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1588 transitions. [2023-11-19 08:05:52,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1588 transitions. [2023-11-19 08:05:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-19 08:05:52,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:52,662 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:52,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:52,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:05:52,887 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:52,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1995784412, now seen corresponding path program 1 times [2023-11-19 08:05:52,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:52,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071738603] [2023-11-19 08:05:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:52,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:55,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:55,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071738603] [2023-11-19 08:05:55,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071738603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:55,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736240025] [2023-11-19 08:05:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:55,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:55,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:55,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:55,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:05:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:55,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-19 08:05:55,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:55,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:05:58,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736240025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:58,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:58,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-11-19 08:05:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404315005] [2023-11-19 08:05:58,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:58,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-19 08:05:58,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-19 08:05:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-19 08:05:58,799 INFO L87 Difference]: Start difference. First operand 1126 states and 1588 transitions. Second operand has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:09,440 INFO L93 Difference]: Finished difference Result 3309 states and 4808 transitions. [2023-11-19 08:06:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-19 08:06:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-11-19 08:06:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:09,458 INFO L225 Difference]: With dead ends: 3309 [2023-11-19 08:06:09,459 INFO L226 Difference]: Without dead ends: 2278 [2023-11-19 08:06:09,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-19 08:06:09,466 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 5905 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6092 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:09,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6092 Valid, 1595 Invalid, 1934 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [444 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 08:06:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2023-11-19 08:06:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2278. [2023-11-19 08:06:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2088 states have (on average 1.3620689655172413) internal successors, (2844), 2088 states have internal predecessors, (2844), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-19 08:06:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3220 transitions. [2023-11-19 08:06:09,578 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3220 transitions. Word has length 113 [2023-11-19 08:06:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:09,578 INFO L495 AbstractCegarLoop]: Abstraction has 2278 states and 3220 transitions. [2023-11-19 08:06:09,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3220 transitions. [2023-11-19 08:06:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-19 08:06:09,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:09,582 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:09,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 08:06:09,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:09,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:09,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1143828796, now seen corresponding path program 2 times [2023-11-19 08:06:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:09,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995341802] [2023-11-19 08:06:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:09,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:17,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:17,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995341802] [2023-11-19 08:06:17,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995341802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:17,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684622503] [2023-11-19 08:06:17,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:06:17,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:17,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:17,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f229f9-e76f-4364-90e0-8e549046e944/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:06:17,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:06:17,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:17,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-19 08:06:17,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 08:06:17,876 INFO L327 TraceCheckSpWp]: Computing backward predicates...