./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-19.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-19.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 47ed50ee23bce943b6d8d1ef42e1233b8fd974d0271bfb8e1001a06043bdfcc4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:05,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:05,823 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:05,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:05,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:05,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:05,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:05,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:05,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:05,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:05,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:05,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:05,876 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:05,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:05,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:05,881 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:05,882 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:05,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:05,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:05,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:05,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:05,885 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:05,885 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:05,886 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:05,886 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:05,887 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:05,888 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:05,888 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:05,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:05,889 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:05,890 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:05,891 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:05,891 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:05,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:05,891 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:05,892 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:05,892 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:05,892 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:05,893 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:05,893 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_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47ed50ee23bce943b6d8d1ef42e1233b8fd974d0271bfb8e1001a06043bdfcc4 [2023-11-06 21:14:06,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:06,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:06,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:06,266 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:06,266 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:06,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-19.i [2023-11-06 21:14:09,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:09,484 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:09,499 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-19.i [2023-11-06 21:14:09,509 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/data/1959c3437/405ba01fded44a768cc18857e9559fe9/FLAG8d13aa48a [2023-11-06 21:14:09,523 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/data/1959c3437/405ba01fded44a768cc18857e9559fe9 [2023-11-06 21:14:09,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:09,527 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:09,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:09,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:09,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:09,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:09,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5644797b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09, skipping insertion in model container [2023-11-06 21:14:09,536 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:09,574 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:09,740 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_9a9d015d-a31c-4c7b-b243-3550e69014bc/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-19.i[917,930] [2023-11-06 21:14:09,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:09,808 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:09,821 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_9a9d015d-a31c-4c7b-b243-3550e69014bc/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-19.i[917,930] [2023-11-06 21:14:09,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:09,894 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:09,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09 WrapperNode [2023-11-06 21:14:09,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:09,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:09,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:09,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:09,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:09,917 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:09,969 INFO L138 Inliner]: procedures = 26, calls = 157, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 419 [2023-11-06 21:14:09,970 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:09,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:09,971 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:09,971 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:09,980 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:09,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,028 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:10,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:10,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:10,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:10,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (1/1) ... [2023-11-06 21:14:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:10,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:10,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:14:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:14:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:14:10,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:14:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:10,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:10,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:10,356 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:10,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:11,000 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:11,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:11,019 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:14:11,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:11 BoogieIcfgContainer [2023-11-06 21:14:11,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:11,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:11,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:11,030 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:11,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:09" (1/3) ... [2023-11-06 21:14:11,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c35ef48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:11, skipping insertion in model container [2023-11-06 21:14:11,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:09" (2/3) ... [2023-11-06 21:14:11,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c35ef48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:11, skipping insertion in model container [2023-11-06 21:14:11,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:11" (3/3) ... [2023-11-06 21:14:11,033 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-ap_file-19.i [2023-11-06 21:14:11,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:11,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:11,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:11,102 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=LoopsAndPotentialCycles, 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;@5db13cd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:11,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:14:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 80 states have (on average 1.4) internal successors, (112), 81 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 21:14:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-06 21:14:11,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:11,123 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:11,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:11,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:11,129 INFO L85 PathProgramCache]: Analyzing trace with hash 504218985, now seen corresponding path program 1 times [2023-11-06 21:14:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:11,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574755757] [2023-11-06 21:14:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:11,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:11,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:11,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326898588] [2023-11-06 21:14:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:11,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:11,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:11,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:11,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:14:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:11,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:14:11,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 21:14:11,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:11,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:11,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574755757] [2023-11-06 21:14:11,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326898588] [2023-11-06 21:14:11,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326898588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:11,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:14:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85805909] [2023-11-06 21:14:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:11,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:11,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:11,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:11,848 INFO L87 Difference]: Start difference. First operand has 100 states, 80 states have (on average 1.4) internal successors, (112), 81 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:11,917 INFO L93 Difference]: Finished difference Result 197 states and 308 transitions. [2023-11-06 21:14:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:14:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 132 [2023-11-06 21:14:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:11,929 INFO L225 Difference]: With dead ends: 197 [2023-11-06 21:14:11,930 INFO L226 Difference]: Without dead ends: 100 [2023-11-06 21:14:11,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:14:11,937 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 3 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:11,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 394 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:14:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-06 21:14:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2023-11-06 21:14:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 79 states have internal predecessors, (105), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 21:14:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 139 transitions. [2023-11-06 21:14:12,058 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 139 transitions. Word has length 132 [2023-11-06 21:14:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:12,064 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 139 transitions. [2023-11-06 21:14:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 139 transitions. [2023-11-06 21:14:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-06 21:14:12,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:12,073 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:12,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:12,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:14:12,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:12,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash 506066027, now seen corresponding path program 1 times [2023-11-06 21:14:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:12,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392198013] [2023-11-06 21:14:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:12,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:12,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163233069] [2023-11-06 21:14:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:12,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:12,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:12,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:14:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:12,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:14:12,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:13,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2023-11-06 21:14:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:13,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 83 [2023-11-06 21:14:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-11-06 21:14:13,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:13,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 176 [2023-11-06 21:14:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 21:14:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392198013] [2023-11-06 21:14:14,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163233069] [2023-11-06 21:14:14,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163233069] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:14,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:14,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-06 21:14:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614603917] [2023-11-06 21:14:14,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:14,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:14,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:14:14,087 INFO L87 Difference]: Start difference. First operand 98 states and 139 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:14,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:14,572 INFO L93 Difference]: Finished difference Result 275 states and 387 transitions. [2023-11-06 21:14:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:14:14,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 132 [2023-11-06 21:14:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:14,576 INFO L225 Difference]: With dead ends: 275 [2023-11-06 21:14:14,576 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 21:14:14,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:14:14,579 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 182 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:14,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 627 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:14:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 21:14:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 106. [2023-11-06 21:14:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.3333333333333333) internal successors, (116), 87 states have internal predecessors, (116), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 21:14:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 150 transitions. [2023-11-06 21:14:14,594 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 150 transitions. Word has length 132 [2023-11-06 21:14:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:14,595 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 150 transitions. [2023-11-06 21:14:14,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 150 transitions. [2023-11-06 21:14:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-06 21:14:14,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:14,598 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:14,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:14,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:14,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:14,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1082281875, now seen corresponding path program 1 times [2023-11-06 21:14:14,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:14,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054254233] [2023-11-06 21:14:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:14,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202395000] [2023-11-06 21:14:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:14,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:14,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:14,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:14:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:15,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:14:15,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:15,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:14:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 21:14:15,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054254233] [2023-11-06 21:14:15,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202395000] [2023-11-06 21:14:15,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202395000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:15,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:15,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:14:15,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97698209] [2023-11-06 21:14:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:15,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:14:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:14:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:14:15,133 INFO L87 Difference]: Start difference. First operand 106 states and 150 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:15,412 INFO L93 Difference]: Finished difference Result 291 states and 407 transitions. [2023-11-06 21:14:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:15,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 132 [2023-11-06 21:14:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:15,415 INFO L225 Difference]: With dead ends: 291 [2023-11-06 21:14:15,416 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 21:14:15,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:15,418 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 85 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:15,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 553 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:14:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 21:14:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 111. [2023-11-06 21:14:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 92 states have (on average 1.3369565217391304) internal successors, (123), 92 states have internal predecessors, (123), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 21:14:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 157 transitions. [2023-11-06 21:14:15,431 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 157 transitions. Word has length 132 [2023-11-06 21:14:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:15,432 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 157 transitions. [2023-11-06 21:14:15,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 157 transitions. [2023-11-06 21:14:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-06 21:14:15,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:15,435 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:15,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:15,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:15,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:15,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash -253394688, now seen corresponding path program 1 times [2023-11-06 21:14:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:15,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324176762] [2023-11-06 21:14:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:15,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:15,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238369382] [2023-11-06 21:14:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:15,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:15,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:15,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:14:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:15,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:14:15,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:16,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:14:17,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:17,073 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:14:17,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-11-06 21:14:17,224 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:17,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2023-11-06 21:14:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 21:14:17,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:17,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324176762] [2023-11-06 21:14:17,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:17,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238369382] [2023-11-06 21:14:17,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238369382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:17,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 21:14:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309356623] [2023-11-06 21:14:17,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:17,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:14:17,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:17,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:14:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:14:17,310 INFO L87 Difference]: Start difference. First operand 111 states and 157 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:18,601 INFO L93 Difference]: Finished difference Result 260 states and 366 transitions. [2023-11-06 21:14:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:14:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 133 [2023-11-06 21:14:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:18,606 INFO L225 Difference]: With dead ends: 260 [2023-11-06 21:14:18,606 INFO L226 Difference]: Without dead ends: 152 [2023-11-06 21:14:18,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:14:18,608 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 207 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 3 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:18,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 466 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 677 Invalid, 15 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:14:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-06 21:14:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 121. [2023-11-06 21:14:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 21:14:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2023-11-06 21:14:18,623 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 133 [2023-11-06 21:14:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:18,624 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2023-11-06 21:14:18,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 21:14:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2023-11-06 21:14:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-06 21:14:18,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:18,627 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:18,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:18,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:18,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:18,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1071043138, now seen corresponding path program 1 times [2023-11-06 21:14:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124615048] [2023-11-06 21:14:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:18,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:18,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223303237] [2023-11-06 21:14:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:18,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:18,896 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:18,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:14:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:19,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 21:14:19,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:19,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:14:20,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:14:21,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:21,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:21,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:22,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:22,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:22,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:23,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:23,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:23,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:23,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:14:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:23,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:14:23,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 21:14:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 9 proven. 457 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-06 21:14:23,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:28,357 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_253 Int) (v_ArrVal_252 (Array Int Int)) (v_ArrVal_251 (Array Int Int))) (< 0 (+ (select (select (let ((.cse0 (store (store |c_#memory_int| c_~signed_long_int_Array_0_arraysigned_long_int_Array_0Var1_Pointer~0.base v_ArrVal_251) c_~signed_long_int_Array_0_arraysigned_long_int_Array_0Var3_Pointer~0.base v_ArrVal_252))) (store .cse0 c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base (store (select .cse0 c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base) c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.offset v_ArrVal_253))) c_~signed_char_Array_0_arraysigned_char_Array_0Var0_Pointer~0.base) c_~signed_char_Array_0_arraysigned_char_Array_0Var0_Pointer~0.offset) 1))) is different from false [2023-11-06 21:14:28,371 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_253 Int) (v_ArrVal_250 (Array Int Int)) (v_ArrVal_252 (Array Int Int)) (v_ArrVal_251 (Array Int Int))) (< 0 (+ (select (select (let ((.cse0 (store (store (store |c_#memory_int| c_~signed_long_int_Array_0_arraysigned_long_int_Array_0Var2_Pointer~0.base v_ArrVal_250) c_~signed_long_int_Array_0_arraysigned_long_int_Array_0Var1_Pointer~0.base v_ArrVal_251) c_~signed_long_int_Array_0_arraysigned_long_int_Array_0Var3_Pointer~0.base v_ArrVal_252))) (store .cse0 c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base (store (select .cse0 c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base) c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.offset v_ArrVal_253))) c_~signed_char_Array_0_arraysigned_char_Array_0Var0_Pointer~0.base) c_~signed_char_Array_0_arraysigned_char_Array_0Var0_Pointer~0.offset) 1))) is different from false [2023-11-06 21:14:28,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:28,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124615048] [2023-11-06 21:14:28,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:28,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223303237] [2023-11-06 21:14:28,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223303237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:28,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:28,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-06 21:14:28,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800958472] [2023-11-06 21:14:28,403 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:28,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:14:28,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:14:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=241, Unknown=5, NotChecked=70, Total=420 [2023-11-06 21:14:28,406 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 16 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 7 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2023-11-06 21:14:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:29,496 INFO L93 Difference]: Finished difference Result 268 states and 375 transitions. [2023-11-06 21:14:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:14:29,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 7 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 133 [2023-11-06 21:14:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:29,499 INFO L225 Difference]: With dead ends: 268 [2023-11-06 21:14:29,499 INFO L226 Difference]: Without dead ends: 150 [2023-11-06 21:14:29,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=193, Invalid=410, Unknown=5, NotChecked=94, Total=702 [2023-11-06 21:14:29,501 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 239 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:29,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 254 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:14:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-06 21:14:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2023-11-06 21:14:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 105 states have internal predecessors, (139), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 21:14:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 173 transitions. [2023-11-06 21:14:29,521 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 173 transitions. Word has length 133 [2023-11-06 21:14:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:29,521 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 173 transitions. [2023-11-06 21:14:29,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 7 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2023-11-06 21:14:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 173 transitions. [2023-11-06 21:14:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-06 21:14:29,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:29,524 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:29,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:29,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:29,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:29,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1657849152, now seen corresponding path program 1 times [2023-11-06 21:14:29,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:29,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256966660] [2023-11-06 21:14:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:29,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:29,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:29,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600407063] [2023-11-06 21:14:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:29,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:29,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:29,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:14:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:30,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-06 21:14:30,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:33,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:14:33,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 21:14:34,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 21:14:35,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 21:14:36,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 21:14:36,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:36,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 21:14:36,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:36,270 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 21:14:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:36,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2023-11-06 21:14:36,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:36,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 47 [2023-11-06 21:14:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 30 proven. 332 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-11-06 21:14:36,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:36,943 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_311 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base v_ArrVal_311))) (= (mod (select (select .cse0 c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.offset) 256) (mod (select (select .cse0 c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.offset) 256))))) (forall ((v_ArrVal_311 (Array Int Int))) (not (= (mod (let ((.cse1 (store |c_#memory_int| c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base v_ArrVal_311))) (+ (select (select .cse1 c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.base) c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.offset) (select (select .cse1 c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.base) c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.offset))) 4294967296) 0)))) is different from false [2023-11-06 21:14:36,978 WARN L839 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_311 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base v_ArrVal_311))) (= (mod (select (select .cse0 c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.offset) 256) (mod (select (select .cse0 c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.offset) 256))))) (forall ((v_ArrVal_311 (Array Int Int))) (not (= (mod (let ((.cse1 (store |c_#memory_int| c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base v_ArrVal_311))) (+ (select (select .cse1 c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.base) c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.offset) (select (select .cse1 c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.base) c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.offset))) 4294967296) 0)))) (= (mod (+ |c_ULTIMATE.start_step_#t~mem28#1| |c_ULTIMATE.start_step_#t~mem29#1|) 4294967296) 0) (= (mod |c_ULTIMATE.start_step_#t~mem26#1| 256) (mod |c_ULTIMATE.start_step_#t~mem27#1| 256))) is different from false [2023-11-06 21:14:37,092 WARN L839 $PredicateComparison]: unable to prove that (or (= (mod (select (select |c_#memory_int| c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.offset) 256) (mod (select (select |c_#memory_int| c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.offset) 256)) (let ((.cse0 (select |c_#memory_int| c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.base)) (.cse1 (select |c_#memory_int| c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.base))) (and (forall ((~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.offset Int) (~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.offset Int)) (or (= (mod (+ (select .cse0 ~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.offset) (select .cse1 ~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.offset)) 4294967296) 0) (forall ((v_ArrVal_311 (Array Int Int))) (not (= (mod (let ((.cse2 (store |c_#memory_int| c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base v_ArrVal_311))) (+ (select (select .cse2 c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.base) ~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.offset) (select (select .cse2 c_~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.base) ~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.offset))) 4294967296) 0))))) (or (forall ((v_ArrVal_311 (Array Int Int))) (not (let ((.cse3 (store |c_#memory_int| c_~signed_char_Array_0_arraysigned_char_Array_0Var2_Pointer~0.base v_ArrVal_311))) (= (mod (select (select .cse3 c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var0_Pointer~0.offset) 256) (mod (select (select .cse3 c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.base) c_~unsigned_char_Array_0_arrayunsigned_char_Array_0Var1_Pointer~0.offset) 256))))) (forall ((~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.offset Int) (~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.offset Int)) (= (mod (+ (select .cse0 ~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var1_Pointer~0.offset) (select .cse1 ~unsigned_long_int_Array_0_arrayunsigned_long_int_Array_0Var0_Pointer~0.offset)) 4294967296) 0)))))) is different from false [2023-11-06 21:14:49,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256966660] [2023-11-06 21:14:49,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600407063] [2023-11-06 21:14:49,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600407063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:49,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:49,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-06 21:14:49,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105938000] [2023-11-06 21:14:49,401 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:49,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:14:49,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:49,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:14:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=468, Unknown=18, NotChecked=144, Total=756 [2023-11-06 21:14:49,403 INFO L87 Difference]: Start difference. First operand 125 states and 173 transitions. Second operand has 20 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-11-06 21:14:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:52,242 INFO L93 Difference]: Finished difference Result 310 states and 421 transitions. [2023-11-06 21:14:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:14:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 133 [2023-11-06 21:14:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:52,245 INFO L225 Difference]: With dead ends: 310 [2023-11-06 21:14:52,245 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 21:14:52,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=333, Invalid=1143, Unknown=18, NotChecked=228, Total=1722 [2023-11-06 21:14:52,247 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 477 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:52,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 515 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 21:14:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 21:14:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 140. [2023-11-06 21:14:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 118 states have internal predecessors, (153), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 21:14:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2023-11-06 21:14:52,283 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 133 [2023-11-06 21:14:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:52,283 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2023-11-06 21:14:52,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-11-06 21:14:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2023-11-06 21:14:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-06 21:14:52,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:52,286 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:52,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:52,494 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:52,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1616049790, now seen corresponding path program 1 times [2023-11-06 21:14:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:52,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700965518] [2023-11-06 21:14:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:52,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:52,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:52,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102319507] [2023-11-06 21:14:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:52,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:52,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:52,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:52,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9d015d-a31c-4c7b-b243-3550e69014bc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:14:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:54,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 161 conjunts are in the unsatisfiable core [2023-11-06 21:14:54,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:55,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-11-06 21:14:57,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:15:00,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-06 21:15:02,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-06 21:15:05,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2023-11-06 21:15:08,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2023-11-06 21:15:10,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 46 [2023-11-06 21:15:12,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2023-11-06 21:15:15,563 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:15:15,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 82 [2023-11-06 21:15:15,903 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:15:15,904 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 92 [2023-11-06 21:15:16,448 INFO L322 Elim1Store]: treesize reduction 48, result has 38.5 percent of original size [2023-11-06 21:15:16,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 133 treesize of output 121 [2023-11-06 21:15:19,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:19,372 INFO L322 Elim1Store]: treesize reduction 49, result has 18.3 percent of original size [2023-11-06 21:15:19,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 5 case distinctions, treesize of input 213 treesize of output 157 [2023-11-06 21:15:40,592 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:40,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 371 treesize of output 187 [2023-11-06 21:16:15,778 WARN L293 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:16:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 27 proven. 462 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 21:16:16,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:45,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:45,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700965518] [2023-11-06 21:16:45,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:16:45,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102319507] [2023-11-06 21:16:45,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102319507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:45,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:16:45,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2023-11-06 21:16:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390153393] [2023-11-06 21:16:45,015 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-06 21:16:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-06 21:16:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2692, Unknown=3, NotChecked=0, Total=2862 [2023-11-06 21:16:45,019 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 42 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 10 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-06 21:18:04,454 WARN L293 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 169 DAG size of output: 174 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:18:11,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 21:18:12,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]