./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-1.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_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/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_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/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_5a90a755-a11a-4b59-9a38-57a3df23516f/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 ea9feee752dca5e5614c423318b7c590a6ae07e20bba2cfd8d20956282c64c55 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:16:08,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:16:08,873 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:16:08,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:16:08,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:16:08,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:16:08,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:16:08,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:16:08,911 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:16:08,912 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:16:08,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:16:08,913 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:16:08,914 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:16:08,915 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:16:08,915 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:16:08,916 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:16:08,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:16:08,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:16:08,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:16:08,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:16:08,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:16:08,920 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:16:08,921 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:16:08,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:16:08,922 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:16:08,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:16:08,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:16:08,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:16:08,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:08,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:16:08,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:16:08,926 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:16:08,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:16:08,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:16:08,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:16:08,928 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:16:08,929 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:16:08,929 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:16:08,930 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:16:08,930 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_5a90a755-a11a-4b59-9a38-57a3df23516f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea9feee752dca5e5614c423318b7c590a6ae07e20bba2cfd8d20956282c64c55 [2023-11-06 22:16:09,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:16:09,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:16:09,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:16:09,259 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:16:09,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:16:09,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-1.i [2023-11-06 22:16:12,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:16:12,914 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:16:12,915 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-1.i [2023-11-06 22:16:12,934 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/data/8304a3117/a34d0120f0c942d68f3e5aadddc93f0a/FLAG34f39f9e6 [2023-11-06 22:16:12,963 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/data/8304a3117/a34d0120f0c942d68f3e5aadddc93f0a [2023-11-06 22:16:12,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:16:12,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:16:12,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:12,983 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:16:12,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:16:12,994 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:12" (1/1) ... [2023-11-06 22:16:12,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d0b9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:12, skipping insertion in model container [2023-11-06 22:16:12,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:12" (1/1) ... [2023-11-06 22:16:13,074 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:16:13,256 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_5a90a755-a11a-4b59-9a38-57a3df23516f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-1.i[915,928] [2023-11-06 22:16:13,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:13,606 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:16:13,632 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_5a90a755-a11a-4b59-9a38-57a3df23516f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-1.i[915,928] [2023-11-06 22:16:13,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:13,885 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:16:13,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13 WrapperNode [2023-11-06 22:16:13,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:13,887 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:13,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:16:13,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:16:13,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:13,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,156 INFO L138 Inliner]: procedures = 26, calls = 74, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 738 [2023-11-06 22:16:14,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:14,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:16:14,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:16:14,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:16:14,189 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,318 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:16:14,377 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:16:14,377 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:16:14,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:16:14,378 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (1/1) ... [2023-11-06 22:16:14,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:14,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:14,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:16:14,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:16:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:16:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:16:14,456 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:16:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:16:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:16:14,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:16:14,608 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:16:14,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:16:16,270 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:16:16,289 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:16:16,289 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:16:16,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:16 BoogieIcfgContainer [2023-11-06 22:16:16,294 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:16:16,300 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:16:16,300 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:16:16,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:16:16,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:16:12" (1/3) ... [2023-11-06 22:16:16,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2457a150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:16, skipping insertion in model container [2023-11-06 22:16:16,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:13" (2/3) ... [2023-11-06 22:16:16,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2457a150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:16, skipping insertion in model container [2023-11-06 22:16:16,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:16" (3/3) ... [2023-11-06 22:16:16,310 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-1.i [2023-11-06 22:16:16,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:16:16,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:16:16,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:16,431 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;@63f76475, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:16,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:16:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 281 states, 217 states have (on average 1.5944700460829493) internal successors, (346), 218 states have internal predecessors, (346), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-06 22:16:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:16:16,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:16,469 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:16,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:16,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash 888209954, now seen corresponding path program 1 times [2023-11-06 22:16:16,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:16,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125187963] [2023-11-06 22:16:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:16,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:16,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125187963] [2023-11-06 22:16:16,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:16:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886805943] [2023-11-06 22:16:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:16,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:16,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:16,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:16,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:16:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:17,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:16:17,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2023-11-06 22:16:17,547 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886805943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:17,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:17,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:16:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609177340] [2023-11-06 22:16:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:17,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:16:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:16:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:16:17,595 INFO L87 Difference]: Start difference. First operand has 281 states, 217 states have (on average 1.5944700460829493) internal successors, (346), 218 states have internal predecessors, (346), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-06 22:16:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:17,663 INFO L93 Difference]: Finished difference Result 552 states and 985 transitions. [2023-11-06 22:16:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:16:17,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) Word has length 436 [2023-11-06 22:16:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:17,680 INFO L225 Difference]: With dead ends: 552 [2023-11-06 22:16:17,683 INFO L226 Difference]: Without dead ends: 274 [2023-11-06 22:16:17,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:16:17,699 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:17,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:16:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-06 22:16:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2023-11-06 22:16:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 211 states have (on average 1.5687203791469195) internal successors, (331), 211 states have internal predecessors, (331), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-06 22:16:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 453 transitions. [2023-11-06 22:16:17,823 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 453 transitions. Word has length 436 [2023-11-06 22:16:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:17,825 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 453 transitions. [2023-11-06 22:16:17,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-06 22:16:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 453 transitions. [2023-11-06 22:16:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:16:17,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:17,844 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:17,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:18,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:16:18,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:18,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash 257395740, now seen corresponding path program 1 times [2023-11-06 22:16:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:18,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867984891] [2023-11-06 22:16:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:18,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:18,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304964150] [2023-11-06 22:16:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:18,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:18,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:18,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:18,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:16:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:18,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:16:18,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:16:18,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867984891] [2023-11-06 22:16:18,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304964150] [2023-11-06 22:16:18,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304964150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:18,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:18,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654984075] [2023-11-06 22:16:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:18,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:18,925 INFO L87 Difference]: Start difference. First operand 274 states and 453 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:19,037 INFO L93 Difference]: Finished difference Result 809 states and 1341 transitions. [2023-11-06 22:16:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 436 [2023-11-06 22:16:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:19,046 INFO L225 Difference]: With dead ends: 809 [2023-11-06 22:16:19,047 INFO L226 Difference]: Without dead ends: 538 [2023-11-06 22:16:19,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:19,050 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 407 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:19,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1095 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:16:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-06 22:16:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 335. [2023-11-06 22:16:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 272 states have (on average 1.6176470588235294) internal successors, (440), 272 states have internal predecessors, (440), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-06 22:16:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 562 transitions. [2023-11-06 22:16:19,088 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 562 transitions. Word has length 436 [2023-11-06 22:16:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:19,092 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 562 transitions. [2023-11-06 22:16:19,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 562 transitions. [2023-11-06 22:16:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:16:19,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:19,102 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:19,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:19,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:16:19,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:19,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 651762526, now seen corresponding path program 1 times [2023-11-06 22:16:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:19,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977453559] [2023-11-06 22:16:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:19,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:19,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678238196] [2023-11-06 22:16:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:19,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:19,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:19,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:19,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:16:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:19,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:16:19,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:16:20,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:20,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:20,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977453559] [2023-11-06 22:16:20,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:20,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678238196] [2023-11-06 22:16:20,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678238196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:20,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:20,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:16:20,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531328469] [2023-11-06 22:16:20,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:20,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:16:20,030 INFO L87 Difference]: Start difference. First operand 335 states and 562 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:20,251 INFO L93 Difference]: Finished difference Result 874 states and 1475 transitions. [2023-11-06 22:16:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 436 [2023-11-06 22:16:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:20,264 INFO L225 Difference]: With dead ends: 874 [2023-11-06 22:16:20,264 INFO L226 Difference]: Without dead ends: 542 [2023-11-06 22:16:20,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 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 22:16:20,268 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 603 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:20,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1116 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:16:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-11-06 22:16:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 433. [2023-11-06 22:16:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 370 states have (on average 1.645945945945946) internal successors, (609), 370 states have internal predecessors, (609), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-06 22:16:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 731 transitions. [2023-11-06 22:16:20,306 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 731 transitions. Word has length 436 [2023-11-06 22:16:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:20,309 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 731 transitions. [2023-11-06 22:16:20,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 731 transitions. [2023-11-06 22:16:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:16:20,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:20,323 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:20,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:20,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:20,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:20,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -204865572, now seen corresponding path program 1 times [2023-11-06 22:16:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:20,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145589875] [2023-11-06 22:16:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:20,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:20,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:20,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454412012] [2023-11-06 22:16:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:20,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:20,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:20,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:16:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:21,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:21,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 964 proven. 168 refuted. 0 times theorem prover too weak. 6188 trivial. 0 not checked. [2023-11-06 22:16:21,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 12 proven. 168 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:22,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:22,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145589875] [2023-11-06 22:16:22,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:22,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454412012] [2023-11-06 22:16:22,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454412012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:22,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:22,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:16:22,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394878746] [2023-11-06 22:16:22,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:16:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:16:22,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:16:22,289 INFO L87 Difference]: Start difference. First operand 433 states and 731 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) [2023-11-06 22:16:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:22,835 INFO L93 Difference]: Finished difference Result 879 states and 1478 transitions. [2023-11-06 22:16:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:16:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) Word has length 437 [2023-11-06 22:16:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:22,845 INFO L225 Difference]: With dead ends: 879 [2023-11-06 22:16:22,845 INFO L226 Difference]: Without dead ends: 449 [2023-11-06 22:16:22,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 866 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:16:22,851 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 554 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:22,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1044 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:16:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-06 22:16:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 444. [2023-11-06 22:16:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 376 states have (on average 1.6303191489361701) internal successors, (613), 377 states have internal predecessors, (613), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-06 22:16:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 743 transitions. [2023-11-06 22:16:22,903 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 743 transitions. Word has length 437 [2023-11-06 22:16:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:22,905 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 743 transitions. [2023-11-06 22:16:22,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) [2023-11-06 22:16:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 743 transitions. [2023-11-06 22:16:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:16:22,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:22,918 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:22,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:23,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:23,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1984892439, now seen corresponding path program 1 times [2023-11-06 22:16:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272383947] [2023-11-06 22:16:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:23,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:23,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976162407] [2023-11-06 22:16:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:23,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:23,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:23,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:23,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:16:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:23,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:23,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 1368 proven. 162 refuted. 0 times theorem prover too weak. 5790 trivial. 0 not checked. [2023-11-06 22:16:24,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:24,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:24,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272383947] [2023-11-06 22:16:24,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:24,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976162407] [2023-11-06 22:16:24,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976162407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:24,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:24,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:16:24,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458698998] [2023-11-06 22:16:24,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:24,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:16:24,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:16:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:16:24,801 INFO L87 Difference]: Start difference. First operand 444 states and 743 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-06 22:16:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:25,247 INFO L93 Difference]: Finished difference Result 884 states and 1477 transitions. [2023-11-06 22:16:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:16:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) Word has length 438 [2023-11-06 22:16:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:25,258 INFO L225 Difference]: With dead ends: 884 [2023-11-06 22:16:25,258 INFO L226 Difference]: Without dead ends: 450 [2023-11-06 22:16:25,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 868 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:16:25,261 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 562 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:25,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1012 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:16:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-06 22:16:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 446. [2023-11-06 22:16:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 377 states have (on average 1.6206896551724137) internal successors, (611), 378 states have internal predecessors, (611), 65 states have call successors, (65), 3 states have call predecessors, (65), 3 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-06 22:16:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 741 transitions. [2023-11-06 22:16:25,309 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 741 transitions. Word has length 438 [2023-11-06 22:16:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:25,311 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 741 transitions. [2023-11-06 22:16:25,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-06 22:16:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 741 transitions. [2023-11-06 22:16:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:16:25,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:25,324 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:25,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:25,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:25,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:25,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -415226012, now seen corresponding path program 1 times [2023-11-06 22:16:25,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:25,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818651809] [2023-11-06 22:16:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:25,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:25,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:25,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408767357] [2023-11-06 22:16:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:25,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:25,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:25,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:25,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:16:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:26,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:26,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2850 proven. 45 refuted. 0 times theorem prover too weak. 4425 trivial. 0 not checked. [2023-11-06 22:16:26,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 135 proven. 45 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:26,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:26,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818651809] [2023-11-06 22:16:26,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:26,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408767357] [2023-11-06 22:16:26,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408767357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:26,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:26,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:16:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613933845] [2023-11-06 22:16:26,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:16:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:16:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:26,816 INFO L87 Difference]: Start difference. First operand 446 states and 741 transitions. Second operand has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-06 22:16:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:27,435 INFO L93 Difference]: Finished difference Result 886 states and 1467 transitions. [2023-11-06 22:16:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:16:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 438 [2023-11-06 22:16:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:27,440 INFO L225 Difference]: With dead ends: 886 [2023-11-06 22:16:27,441 INFO L226 Difference]: Without dead ends: 450 [2023-11-06 22:16:27,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:16:27,443 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 840 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:27,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 987 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:16:27,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-06 22:16:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 446. [2023-11-06 22:16:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 376 states have (on average 1.5904255319148937) internal successors, (598), 377 states have internal predecessors, (598), 65 states have call successors, (65), 4 states have call predecessors, (65), 4 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-06 22:16:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 728 transitions. [2023-11-06 22:16:27,483 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 728 transitions. Word has length 438 [2023-11-06 22:16:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:27,485 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 728 transitions. [2023-11-06 22:16:27,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-06 22:16:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 728 transitions. [2023-11-06 22:16:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:16:27,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:27,490 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:27,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:27,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:27,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:27,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1523936034, now seen corresponding path program 1 times [2023-11-06 22:16:27,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:27,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6105020] [2023-11-06 22:16:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:27,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:27,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021802271] [2023-11-06 22:16:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:27,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:27,790 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:27,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:16:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:28,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:28,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 298 proven. 177 refuted. 0 times theorem prover too weak. 6845 trivial. 0 not checked. [2023-11-06 22:16:28,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3 proven. 177 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:29,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6105020] [2023-11-06 22:16:29,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021802271] [2023-11-06 22:16:29,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021802271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:29,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:29,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:16:29,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271181165] [2023-11-06 22:16:29,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:29,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:16:29,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:16:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:16:29,306 INFO L87 Difference]: Start difference. First operand 446 states and 728 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-06 22:16:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:29,820 INFO L93 Difference]: Finished difference Result 802 states and 1289 transitions. [2023-11-06 22:16:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:16:29,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 438 [2023-11-06 22:16:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:29,826 INFO L225 Difference]: With dead ends: 802 [2023-11-06 22:16:29,826 INFO L226 Difference]: Without dead ends: 366 [2023-11-06 22:16:29,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 868 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:16:29,829 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 264 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:29,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 966 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:16:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-06 22:16:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 358. [2023-11-06 22:16:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 286 states have (on average 1.5244755244755244) internal successors, (436), 287 states have internal predecessors, (436), 65 states have call successors, (65), 6 states have call predecessors, (65), 6 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-06 22:16:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 566 transitions. [2023-11-06 22:16:29,865 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 566 transitions. Word has length 438 [2023-11-06 22:16:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:29,866 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 566 transitions. [2023-11-06 22:16:29,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (120), 2 states have call predecessors, (120), 4 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-06 22:16:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 566 transitions. [2023-11-06 22:16:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:16:29,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:29,872 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:29,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:30,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:30,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:30,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1498153446, now seen corresponding path program 1 times [2023-11-06 22:16:30,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:30,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058923643] [2023-11-06 22:16:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:30,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:30,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49099257] [2023-11-06 22:16:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:30,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:30,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:30,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:16:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:30,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:30,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:30,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058923643] [2023-11-06 22:16:30,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:30,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49099257] [2023-11-06 22:16:30,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49099257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:30,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:30,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:16:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851132295] [2023-11-06 22:16:30,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:30,733 INFO L87 Difference]: Start difference. First operand 358 states and 566 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 2 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:31,163 INFO L93 Difference]: Finished difference Result 716 states and 1128 transitions. [2023-11-06 22:16:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:16:31,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 2 states have call predecessors, (61), 1 states have call successors, (61) Word has length 439 [2023-11-06 22:16:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:31,168 INFO L225 Difference]: With dead ends: 716 [2023-11-06 22:16:31,169 INFO L226 Difference]: Without dead ends: 372 [2023-11-06 22:16:31,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:16:31,171 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 358 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:31,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 997 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:16:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-06 22:16:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 362. [2023-11-06 22:16:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 289 states have (on average 1.5155709342560553) internal successors, (438), 290 states have internal predecessors, (438), 65 states have call successors, (65), 7 states have call predecessors, (65), 7 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-06 22:16:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 568 transitions. [2023-11-06 22:16:31,209 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 568 transitions. Word has length 439 [2023-11-06 22:16:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:31,210 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 568 transitions. [2023-11-06 22:16:31,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 2 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 568 transitions. [2023-11-06 22:16:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:16:31,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:31,215 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:31,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:16:31,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:31,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 410304344, now seen corresponding path program 1 times [2023-11-06 22:16:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:31,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646271385] [2023-11-06 22:16:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:31,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:31,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892683003] [2023-11-06 22:16:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:31,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:31,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:31,512 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:31,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:16:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:31,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:16:31,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3907 proven. 198 refuted. 0 times theorem prover too weak. 3215 trivial. 0 not checked. [2023-11-06 22:16:33,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 156 proven. 201 refuted. 0 times theorem prover too weak. 6963 trivial. 0 not checked. [2023-11-06 22:16:33,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:33,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646271385] [2023-11-06 22:16:33,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:33,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892683003] [2023-11-06 22:16:33,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892683003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:33,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:33,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 22:16:33,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70417692] [2023-11-06 22:16:33,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:16:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:16:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:16:33,649 INFO L87 Difference]: Start difference. First operand 362 states and 568 transitions. Second operand has 14 states, 14 states have (on average 14.285714285714286) internal successors, (200), 14 states have internal predecessors, (200), 5 states have call successors, (96), 3 states have call predecessors, (96), 7 states have return successors, (97), 5 states have call predecessors, (97), 5 states have call successors, (97) [2023-11-06 22:16:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:34,537 INFO L93 Difference]: Finished difference Result 730 states and 1137 transitions. [2023-11-06 22:16:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:16:34,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.285714285714286) internal successors, (200), 14 states have internal predecessors, (200), 5 states have call successors, (96), 3 states have call predecessors, (96), 7 states have return successors, (97), 5 states have call predecessors, (97), 5 states have call successors, (97) Word has length 439 [2023-11-06 22:16:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:34,542 INFO L225 Difference]: With dead ends: 730 [2023-11-06 22:16:34,542 INFO L226 Difference]: Without dead ends: 382 [2023-11-06 22:16:34,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 864 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:16:34,546 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 837 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:34,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 1211 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:16:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-06 22:16:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 370. [2023-11-06 22:16:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 295 states have (on average 1.5016949152542374) internal successors, (443), 296 states have internal predecessors, (443), 65 states have call successors, (65), 9 states have call predecessors, (65), 9 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-06 22:16:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 573 transitions. [2023-11-06 22:16:34,585 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 573 transitions. Word has length 439 [2023-11-06 22:16:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:34,586 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 573 transitions. [2023-11-06 22:16:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.285714285714286) internal successors, (200), 14 states have internal predecessors, (200), 5 states have call successors, (96), 3 states have call predecessors, (96), 7 states have return successors, (97), 5 states have call predecessors, (97), 5 states have call successors, (97) [2023-11-06 22:16:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 573 transitions. [2023-11-06 22:16:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:16:34,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:34,592 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:34,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:34,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:34,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:34,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1500738214, now seen corresponding path program 1 times [2023-11-06 22:16:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:34,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959144954] [2023-11-06 22:16:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:34,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:34,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:34,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337392776] [2023-11-06 22:16:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:34,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:34,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:34,906 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:34,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:16:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:35,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:16:35,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2598 proven. 39 refuted. 0 times theorem prover too weak. 4683 trivial. 0 not checked. [2023-11-06 22:16:36,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 141 proven. 39 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959144954] [2023-11-06 22:16:36,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337392776] [2023-11-06 22:16:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337392776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:36,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:36,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:16:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727116681] [2023-11-06 22:16:36,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:16:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:16:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:16:36,885 INFO L87 Difference]: Start difference. First operand 370 states and 573 transitions. Second operand has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2023-11-06 22:16:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:39,134 INFO L93 Difference]: Finished difference Result 1507 states and 2366 transitions. [2023-11-06 22:16:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:16:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) Word has length 439 [2023-11-06 22:16:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:39,152 INFO L225 Difference]: With dead ends: 1507 [2023-11-06 22:16:39,152 INFO L226 Difference]: Without dead ends: 1151 [2023-11-06 22:16:39,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:16:39,157 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 1172 mSDsluCounter, 3101 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 3607 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:39,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 3607 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:16:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2023-11-06 22:16:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 922. [2023-11-06 22:16:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 777 states have (on average 1.5456885456885456) internal successors, (1201), 778 states have internal predecessors, (1201), 126 states have call successors, (126), 18 states have call predecessors, (126), 18 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-06 22:16:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1453 transitions. [2023-11-06 22:16:39,295 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1453 transitions. Word has length 439 [2023-11-06 22:16:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:39,296 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1453 transitions. [2023-11-06 22:16:39,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2023-11-06 22:16:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1453 transitions. [2023-11-06 22:16:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:16:39,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:39,301 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:39,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:39,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:16:39,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:39,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2087014436, now seen corresponding path program 1 times [2023-11-06 22:16:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:39,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6968777] [2023-11-06 22:16:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:39,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:39,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808600490] [2023-11-06 22:16:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:39,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:39,596 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:39,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:16:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:40,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:16:40,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3700 proven. 96 refuted. 0 times theorem prover too weak. 3524 trivial. 0 not checked. [2023-11-06 22:16:41,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:16:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6968777] [2023-11-06 22:16:41,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808600490] [2023-11-06 22:16:41,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808600490] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:41,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:16:41,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-06 22:16:41,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175378230] [2023-11-06 22:16:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:41,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:41,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:16:41,796 INFO L87 Difference]: Start difference. First operand 922 states and 1453 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:42,562 INFO L93 Difference]: Finished difference Result 3992 states and 6319 transitions. [2023-11-06 22:16:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:42,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 439 [2023-11-06 22:16:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:42,584 INFO L225 Difference]: With dead ends: 3992 [2023-11-06 22:16:42,585 INFO L226 Difference]: Without dead ends: 3084 [2023-11-06 22:16:42,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:16:42,589 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 1007 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:42,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1913 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:16:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2023-11-06 22:16:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3074. [2023-11-06 22:16:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 2654 states have (on average 1.563677467972871) internal successors, (4150), 2659 states have internal predecessors, (4150), 360 states have call successors, (360), 59 states have call predecessors, (360), 59 states have return successors, (360), 355 states have call predecessors, (360), 360 states have call successors, (360) [2023-11-06 22:16:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4870 transitions. [2023-11-06 22:16:42,944 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4870 transitions. Word has length 439 [2023-11-06 22:16:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:42,945 INFO L495 AbstractCegarLoop]: Abstraction has 3074 states and 4870 transitions. [2023-11-06 22:16:42,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:16:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4870 transitions. [2023-11-06 22:16:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:16:42,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:42,952 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:42,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:43,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:16:43,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:43,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash -128439650, now seen corresponding path program 1 times [2023-11-06 22:16:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:43,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368702972] [2023-11-06 22:16:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:43,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117506175] [2023-11-06 22:16:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:43,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:43,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:43,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:43,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:16:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:43,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:16:43,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3700 proven. 96 refuted. 0 times theorem prover too weak. 3524 trivial. 0 not checked. [2023-11-06 22:16:44,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 84 proven. 96 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:44,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:44,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368702972] [2023-11-06 22:16:44,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:44,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117506175] [2023-11-06 22:16:44,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117506175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:44,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:44,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:16:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048779948] [2023-11-06 22:16:44,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:16:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:16:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:16:44,659 INFO L87 Difference]: Start difference. First operand 3074 states and 4870 transitions. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 3 states have call predecessors, (94), 3 states have call successors, (94) [2023-11-06 22:16:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:45,917 INFO L93 Difference]: Finished difference Result 5087 states and 7999 transitions. [2023-11-06 22:16:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:16:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 3 states have call predecessors, (94), 3 states have call successors, (94) Word has length 439 [2023-11-06 22:16:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:45,932 INFO L225 Difference]: With dead ends: 5087 [2023-11-06 22:16:45,932 INFO L226 Difference]: Without dead ends: 2027 [2023-11-06 22:16:45,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:16:45,941 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1306 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:45,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1334 Valid, 1075 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:16:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2023-11-06 22:16:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 980. [2023-11-06 22:16:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 808 states have (on average 1.5173267326732673) internal successors, (1226), 809 states have internal predecessors, (1226), 146 states have call successors, (146), 25 states have call predecessors, (146), 25 states have return successors, (146), 145 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-06 22:16:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1518 transitions. [2023-11-06 22:16:46,092 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1518 transitions. Word has length 439 [2023-11-06 22:16:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:46,093 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1518 transitions. [2023-11-06 22:16:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 3 states have call predecessors, (94), 3 states have call successors, (94) [2023-11-06 22:16:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1518 transitions. [2023-11-06 22:16:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-06 22:16:46,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:46,099 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:46,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:46,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:16:46,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:46,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1457147383, now seen corresponding path program 1 times [2023-11-06 22:16:46,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:46,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70586665] [2023-11-06 22:16:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:46,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:46,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:46,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513448502] [2023-11-06 22:16:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:46,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:46,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:46,410 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:46,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:16:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:46,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:16:46,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2935 proven. 270 refuted. 0 times theorem prover too weak. 4115 trivial. 0 not checked. [2023-11-06 22:16:50,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 39 proven. 141 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:16:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:53,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70586665] [2023-11-06 22:16:53,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:53,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513448502] [2023-11-06 22:16:53,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513448502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:53,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:53,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2023-11-06 22:16:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710968737] [2023-11-06 22:16:53,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:53,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:16:53,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:16:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:16:53,828 INFO L87 Difference]: Start difference. First operand 980 states and 1518 transitions. Second operand has 25 states, 25 states have (on average 10.48) internal successors, (262), 25 states have internal predecessors, (262), 5 states have call successors, (122), 4 states have call predecessors, (122), 7 states have return successors, (122), 5 states have call predecessors, (122), 5 states have call successors, (122) [2023-11-06 22:17:00,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:03,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:05,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:07,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:09,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:11,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:13,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:15,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:17,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:19,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:21,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:23,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:25,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:27,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:29,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:31,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:17:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:42,055 INFO L93 Difference]: Finished difference Result 13548 states and 21252 transitions. [2023-11-06 22:17:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-06 22:17:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 10.48) internal successors, (262), 25 states have internal predecessors, (262), 5 states have call successors, (122), 4 states have call predecessors, (122), 7 states have return successors, (122), 5 states have call predecessors, (122), 5 states have call successors, (122) Word has length 440 [2023-11-06 22:17:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:42,133 INFO L225 Difference]: With dead ends: 13548 [2023-11-06 22:17:42,133 INFO L226 Difference]: Without dead ends: 12624 [2023-11-06 22:17:42,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1015 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5668 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4106, Invalid=11644, Unknown=0, NotChecked=0, Total=15750 [2023-11-06 22:17:42,144 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 10824 mSDsluCounter, 6527 mSDsCounter, 0 mSdLazyCounter, 4248 mSolverCounterSat, 1384 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10910 SdHoareTripleChecker+Valid, 6972 SdHoareTripleChecker+Invalid, 5648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1384 IncrementalHoareTripleChecker+Valid, 4248 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:42,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10910 Valid, 6972 Invalid, 5648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1384 Valid, 4248 Invalid, 16 Unknown, 0 Unchecked, 42.1s Time] [2023-11-06 22:17:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12624 states. [2023-11-06 22:17:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12624 to 4972. [2023-11-06 22:17:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4972 states, 4462 states have (on average 1.5856118332586284) internal successors, (7075), 4466 states have internal predecessors, (7075), 418 states have call successors, (418), 91 states have call predecessors, (418), 91 states have return successors, (418), 414 states have call predecessors, (418), 418 states have call successors, (418) [2023-11-06 22:17:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4972 states to 4972 states and 7911 transitions. [2023-11-06 22:17:42,821 INFO L78 Accepts]: Start accepts. Automaton has 4972 states and 7911 transitions. Word has length 440 [2023-11-06 22:17:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:42,822 INFO L495 AbstractCegarLoop]: Abstraction has 4972 states and 7911 transitions. [2023-11-06 22:17:42,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.48) internal successors, (262), 25 states have internal predecessors, (262), 5 states have call successors, (122), 4 states have call predecessors, (122), 7 states have return successors, (122), 5 states have call predecessors, (122), 5 states have call successors, (122) [2023-11-06 22:17:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4972 states and 7911 transitions. [2023-11-06 22:17:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-06 22:17:42,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:42,847 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:17:42,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:43,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:17:43,056 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:43,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1033500661, now seen corresponding path program 1 times [2023-11-06 22:17:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:43,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025700225] [2023-11-06 22:17:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:43,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:43,125 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:43,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788919301] [2023-11-06 22:17:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:43,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:43,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:43,127 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:43,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:17:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:43,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:17:43,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 5045 proven. 408 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2023-11-06 22:17:49,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 147 proven. 210 refuted. 0 times theorem prover too weak. 6963 trivial. 0 not checked. [2023-11-06 22:17:52,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:52,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025700225] [2023-11-06 22:17:52,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:52,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788919301] [2023-11-06 22:17:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788919301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:52,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:52,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 30 [2023-11-06 22:17:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078373777] [2023-11-06 22:17:52,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:52,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:17:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:52,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:17:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:17:52,614 INFO L87 Difference]: Start difference. First operand 4972 states and 7911 transitions. Second operand has 30 states, 28 states have (on average 10.214285714285714) internal successors, (286), 30 states have internal predecessors, (286), 13 states have call successors, (122), 8 states have call predecessors, (122), 12 states have return successors, (122), 9 states have call predecessors, (122), 13 states have call successors, (122) [2023-11-06 22:17:59,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:01,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:03,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:05,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:07,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:09,452 INFO L93 Difference]: Finished difference Result 14629 states and 22808 transitions. [2023-11-06 22:18:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:18:09,453 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 10.214285714285714) internal successors, (286), 30 states have internal predecessors, (286), 13 states have call successors, (122), 8 states have call predecessors, (122), 12 states have return successors, (122), 9 states have call predecessors, (122), 13 states have call successors, (122) Word has length 440 [2023-11-06 22:18:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:09,490 INFO L225 Difference]: With dead ends: 14629 [2023-11-06 22:18:09,490 INFO L226 Difference]: Without dead ends: 9660 [2023-11-06 22:18:09,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1111, Invalid=2311, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:18:09,501 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 4879 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 1140 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4895 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1140 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:09,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4895 Valid, 2819 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1140 Valid, 2075 Invalid, 5 Unknown, 0 Unchecked, 14.3s Time] [2023-11-06 22:18:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9660 states. [2023-11-06 22:18:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9660 to 7705. [2023-11-06 22:18:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7705 states, 6895 states have (on average 1.5474981870920956) internal successors, (10670), 6897 states have internal predecessors, (10670), 634 states have call successors, (634), 175 states have call predecessors, (634), 175 states have return successors, (634), 632 states have call predecessors, (634), 634 states have call successors, (634) [2023-11-06 22:18:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7705 states to 7705 states and 11938 transitions. [2023-11-06 22:18:10,411 INFO L78 Accepts]: Start accepts. Automaton has 7705 states and 11938 transitions. Word has length 440 [2023-11-06 22:18:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:10,413 INFO L495 AbstractCegarLoop]: Abstraction has 7705 states and 11938 transitions. [2023-11-06 22:18:10,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 10.214285714285714) internal successors, (286), 30 states have internal predecessors, (286), 13 states have call successors, (122), 8 states have call predecessors, (122), 12 states have return successors, (122), 9 states have call predecessors, (122), 13 states have call successors, (122) [2023-11-06 22:18:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7705 states and 11938 transitions. [2023-11-06 22:18:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:18:10,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:10,420 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:10,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:10,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:18:10,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:10,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2035933842, now seen corresponding path program 1 times [2023-11-06 22:18:10,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471060946] [2023-11-06 22:18:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:10,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:10,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909127206] [2023-11-06 22:18:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:10,712 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:10,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:18:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:11,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:18:11,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2238 proven. 147 refuted. 0 times theorem prover too weak. 4935 trivial. 0 not checked. [2023-11-06 22:18:12,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:18:13,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471060946] [2023-11-06 22:18:13,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909127206] [2023-11-06 22:18:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909127206] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:13,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:18:13,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-06 22:18:13,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353059883] [2023-11-06 22:18:13,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:13,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:13,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:13,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:13,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:18:13,303 INFO L87 Difference]: Start difference. First operand 7705 states and 11938 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:18:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:15,544 INFO L93 Difference]: Finished difference Result 26632 states and 41277 transitions. [2023-11-06 22:18:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:15,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 441 [2023-11-06 22:18:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:15,591 INFO L225 Difference]: With dead ends: 26632 [2023-11-06 22:18:15,591 INFO L226 Difference]: Without dead ends: 18930 [2023-11-06 22:18:15,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:18:15,605 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 672 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:15,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 1237 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:18:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18930 states. [2023-11-06 22:18:17,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18930 to 18914. [2023-11-06 22:18:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18914 states, 17125 states have (on average 1.5464525547445256) internal successors, (26483), 17141 states have internal predecessors, (26483), 1388 states have call successors, (1388), 400 states have call predecessors, (1388), 400 states have return successors, (1388), 1372 states have call predecessors, (1388), 1388 states have call successors, (1388) [2023-11-06 22:18:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18914 states to 18914 states and 29259 transitions. [2023-11-06 22:18:17,397 INFO L78 Accepts]: Start accepts. Automaton has 18914 states and 29259 transitions. Word has length 441 [2023-11-06 22:18:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:17,399 INFO L495 AbstractCegarLoop]: Abstraction has 18914 states and 29259 transitions. [2023-11-06 22:18:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-06 22:18:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 18914 states and 29259 transitions. [2023-11-06 22:18:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:18:17,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:17,429 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:17,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:17,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:18:17,641 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:17,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1041240144, now seen corresponding path program 1 times [2023-11-06 22:18:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486342565] [2023-11-06 22:18:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:17,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:17,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:17,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245908581] [2023-11-06 22:18:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:17,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:17,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:17,739 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:17,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:18:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:18,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:18:18,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 4752 proven. 210 refuted. 0 times theorem prover too weak. 2358 trivial. 0 not checked. [2023-11-06 22:18:20,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:25,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:25,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486342565] [2023-11-06 22:18:25,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:25,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245908581] [2023-11-06 22:18:25,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245908581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:25,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:18:25,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-06 22:18:25,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331460171] [2023-11-06 22:18:25,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:25,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:18:25,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:25,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:18:25,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:18:25,146 INFO L87 Difference]: Start difference. First operand 18914 states and 29259 transitions. Second operand has 13 states, 13 states have (on average 11.615384615384615) internal successors, (151), 12 states have internal predecessors, (151), 3 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2023-11-06 22:18:29,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:32,277 INFO L93 Difference]: Finished difference Result 48531 states and 75039 transitions. [2023-11-06 22:18:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:18:32,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.615384615384615) internal successors, (151), 12 states have internal predecessors, (151), 3 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) Word has length 441 [2023-11-06 22:18:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:32,365 INFO L225 Difference]: With dead ends: 48531 [2023-11-06 22:18:32,365 INFO L226 Difference]: Without dead ends: 29620 [2023-11-06 22:18:32,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:18:32,403 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 2086 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 178 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:32,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2100 Valid, 2638 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1662 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-06 22:18:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29620 states. [2023-11-06 22:18:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29620 to 22635. [2023-11-06 22:18:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22635 states, 20816 states have (on average 1.5569273635664873) internal successors, (32409), 20833 states have internal predecessors, (32409), 1400 states have call successors, (1400), 418 states have call predecessors, (1400), 418 states have return successors, (1400), 1383 states have call predecessors, (1400), 1400 states have call successors, (1400) [2023-11-06 22:18:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22635 states to 22635 states and 35209 transitions. [2023-11-06 22:18:34,707 INFO L78 Accepts]: Start accepts. Automaton has 22635 states and 35209 transitions. Word has length 441 [2023-11-06 22:18:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:34,709 INFO L495 AbstractCegarLoop]: Abstraction has 22635 states and 35209 transitions. [2023-11-06 22:18:34,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.615384615384615) internal successors, (151), 12 states have internal predecessors, (151), 3 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2023-11-06 22:18:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 22635 states and 35209 transitions. [2023-11-06 22:18:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:18:34,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:34,728 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:34,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:34,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:18:34,940 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:34,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:34,941 INFO L85 PathProgramCache]: Analyzing trace with hash 525517806, now seen corresponding path program 1 times [2023-11-06 22:18:34,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:34,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289993659] [2023-11-06 22:18:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:35,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:18:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473583030] [2023-11-06 22:18:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:35,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:35,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:18:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:35,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:18:35,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3630 proven. 75 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2023-11-06 22:18:36,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 105 proven. 75 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-06 22:18:37,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:37,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289993659] [2023-11-06 22:18:37,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:18:37,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473583030] [2023-11-06 22:18:37,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473583030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:37,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:37,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:18:37,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45921286] [2023-11-06 22:18:37,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:37,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:37,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:37,639 INFO L87 Difference]: Start difference. First operand 22635 states and 35209 transitions. Second operand has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2023-11-06 22:18:41,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:43,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:50,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:52,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:18:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:56,217 INFO L93 Difference]: Finished difference Result 96104 states and 148877 transitions. [2023-11-06 22:18:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:18:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) Word has length 441 [2023-11-06 22:18:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:56,419 INFO L225 Difference]: With dead ends: 96104 [2023-11-06 22:18:56,419 INFO L226 Difference]: Without dead ends: 73515 [2023-11-06 22:18:56,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 872 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:18:56,457 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 1420 mSDsluCounter, 3971 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 344 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 4643 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:56,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1517 Valid, 4643 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 2294 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2023-11-06 22:18:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73515 states. [2023-11-06 22:19:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73515 to 40312. [2023-11-06 22:19:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40312 states, 37317 states have (on average 1.5571187394485086) internal successors, (58107), 37345 states have internal predecessors, (58107), 2309 states have call successors, (2309), 685 states have call predecessors, (2309), 685 states have return successors, (2309), 2281 states have call predecessors, (2309), 2309 states have call successors, (2309) [2023-11-06 22:19:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40312 states to 40312 states and 62725 transitions. [2023-11-06 22:19:00,851 INFO L78 Accepts]: Start accepts. Automaton has 40312 states and 62725 transitions. Word has length 441 [2023-11-06 22:19:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:00,853 INFO L495 AbstractCegarLoop]: Abstraction has 40312 states and 62725 transitions. [2023-11-06 22:19:00,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2023-11-06 22:19:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 40312 states and 62725 transitions. [2023-11-06 22:19:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-06 22:19:00,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:00,876 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:19:00,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:01,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:19:01,089 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:01,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash 193438091, now seen corresponding path program 1 times [2023-11-06 22:19:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102401768] [2023-11-06 22:19:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:01,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:19:01,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566606260] [2023-11-06 22:19:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:01,194 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:01,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a90a755-a11a-4b59-9a38-57a3df23516f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:19:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:02,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:19:02,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 4673 proven. 210 refuted. 0 times theorem prover too weak. 2437 trivial. 0 not checked. [2023-11-06 22:19:11,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:21,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102401768] [2023-11-06 22:19:21,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:19:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566606260] [2023-11-06 22:19:21,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566606260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:21,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:19:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-06 22:19:21,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910015787] [2023-11-06 22:19:21,642 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:21,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:21,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:21,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2023-11-06 22:19:21,644 INFO L87 Difference]: Start difference. First operand 40312 states and 62725 transitions. Second operand has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 12 states have internal predecessors, (152), 4 states have call successors, (61), 4 states have call predecessors, (61), 5 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) [2023-11-06 22:19:29,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:19:31,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:19:33,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:19:35,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:19:37,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:19:45,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:19:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:46,452 INFO L93 Difference]: Finished difference Result 96281 states and 149198 transitions. [2023-11-06 22:19:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:19:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 12 states have internal predecessors, (152), 4 states have call successors, (61), 4 states have call predecessors, (61), 5 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) Word has length 442 [2023-11-06 22:19:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:46,618 INFO L225 Difference]: With dead ends: 96281 [2023-11-06 22:19:46,618 INFO L226 Difference]: Without dead ends: 56169 [2023-11-06 22:19:46,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=259, Invalid=862, Unknown=1, NotChecked=0, Total=1122 [2023-11-06 22:19:46,663 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 1081 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 168 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:46,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 2968 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1232 Invalid, 6 Unknown, 0 Unchecked, 17.5s Time] [2023-11-06 22:19:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56169 states.