./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8 --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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:11:39,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:11:39,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:11:39,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:11:39,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:11:39,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:11:39,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:11:39,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:11:39,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:11:39,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:11:39,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:11:39,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:11:39,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:11:39,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:11:39,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:11:39,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:11:39,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:11:39,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:11:39,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:11:39,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:11:39,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:11:39,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:11:39,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:11:39,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:11:39,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:11:39,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:11:39,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:11:39,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:11:39,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:11:39,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:11:39,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:11:39,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:11:39,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:11:39,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:11:39,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:11:39,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:11:39,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:11:39,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:11:39,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:11:39,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:11:39,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:11:39,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:11:39,704 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:11:39,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:11:39,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:11:39,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:11:39,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:11:39,706 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:11:39,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:11:39,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:11:39,707 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:11:39,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:11:39,707 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:11:39,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:11:39,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:11:39,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:11:39,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:11:39,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:11:39,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:11:39,708 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:11:39,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:11:39,709 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:11:39,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:11:39,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:11:39,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:11:39,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:11:39,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:11:39,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:11:39,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:11:39,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:11:39,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:11:39,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:11:39,711 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:11:39,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:11:39,711 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:11:39,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:11:39,712 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:11:39,712 INFO L138 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_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2022-12-13 17:11:39,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:11:39,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:11:39,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:11:39,921 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:11:39,922 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:11:39,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-tiling/mbpr2.c [2022-12-13 17:11:42,488 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:11:42,640 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:11:42,640 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/sv-benchmarks/c/array-tiling/mbpr2.c [2022-12-13 17:11:42,645 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/data/be0db3a7f/57764b057d11487982796ba2236a973b/FLAGf752a38d8 [2022-12-13 17:11:42,656 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/data/be0db3a7f/57764b057d11487982796ba2236a973b [2022-12-13 17:11:42,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:11:42,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:11:42,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:11:42,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:11:42,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:11:42,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5f9188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42, skipping insertion in model container [2022-12-13 17:11:42,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:11:42,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:11:42,807 WARN L237 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_460303f7-850a-471c-bd7c-0ee55f10e22c/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-12-13 17:11:42,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:11:42,828 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:11:42,837 WARN L237 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_460303f7-850a-471c-bd7c-0ee55f10e22c/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-12-13 17:11:42,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:11:42,853 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:11:42,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42 WrapperNode [2022-12-13 17:11:42,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:11:42,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:11:42,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:11:42,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:11:42,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,883 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-12-13 17:11:42,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:11:42,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:11:42,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:11:42,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:11:42,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:11:42,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:11:42,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:11:42,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:11:42,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (1/1) ... [2022-12-13 17:11:42,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:11:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:42,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:11:42,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:11:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:11:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:11:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:11:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:11:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:11:42,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:11:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:11:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:11:43,009 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:11:43,011 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:11:43,148 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:11:43,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:11:43,153 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 17:11:43,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:11:43 BoogieIcfgContainer [2022-12-13 17:11:43,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:11:43,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:11:43,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:11:43,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:11:43,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:11:42" (1/3) ... [2022-12-13 17:11:43,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4387ad19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:11:43, skipping insertion in model container [2022-12-13 17:11:43,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:11:42" (2/3) ... [2022-12-13 17:11:43,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4387ad19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:11:43, skipping insertion in model container [2022-12-13 17:11:43,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:11:43" (3/3) ... [2022-12-13 17:11:43,161 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2022-12-13 17:11:43,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:11:43,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:11:43,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:11:43,214 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;@57f83816, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:11:43,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 17:11:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:11:43,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:43,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:43,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -669443655, now seen corresponding path program 1 times [2022-12-13 17:11:43,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:43,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218018416] [2022-12-13 17:11:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:11:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:43,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218018416] [2022-12-13 17:11:43,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218018416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:11:43,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:11:43,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:11:43,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014307700] [2022-12-13 17:11:43,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:11:43,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:11:43,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:43,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:11:43,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:11:43,381 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:43,393 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-12-13 17:11:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:11:43,395 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:11:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:43,400 INFO L225 Difference]: With dead ends: 53 [2022-12-13 17:11:43,401 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 17:11:43,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:11:43,405 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-12-13 17:11:43,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:11:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 17:11:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-13 17:11:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-12-13 17:11:43,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2022-12-13 17:11:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:43,428 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-12-13 17:11:43,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-12-13 17:11:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:11:43,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:43,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:43,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:11:43,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash -893920799, now seen corresponding path program 1 times [2022-12-13 17:11:43,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:43,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101370751] [2022-12-13 17:11:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:43,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:11:43,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101370751] [2022-12-13 17:11:43,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101370751] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:11:43,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:11:43,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:11:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903325264] [2022-12-13 17:11:43,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:11:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:11:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:11:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:11:43,558 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:43,591 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-12-13 17:11:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:11:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:11:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:43,592 INFO L225 Difference]: With dead ends: 33 [2022-12-13 17:11:43,592 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 17:11:43,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:11:43,593 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:43,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:11:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 17:11:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-12-13 17:11:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-12-13 17:11:43,597 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2022-12-13 17:11:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:43,598 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-12-13 17:11:43,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-12-13 17:11:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:11:43,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:43,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:43,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:11:43,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash -893861217, now seen corresponding path program 1 times [2022-12-13 17:11:43,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:43,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611799760] [2022-12-13 17:11:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:11:43,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611799760] [2022-12-13 17:11:43,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611799760] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:11:43,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:11:43,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:11:43,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461484312] [2022-12-13 17:11:43,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:11:43,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:11:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:11:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:11:43,787 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:43,850 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-12-13 17:11:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:11:43,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:11:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:43,851 INFO L225 Difference]: With dead ends: 50 [2022-12-13 17:11:43,851 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 17:11:43,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:11:43,853 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:43,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 22 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:11:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 17:11:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-12-13 17:11:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-13 17:11:43,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2022-12-13 17:11:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:43,858 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-13 17:11:43,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-13 17:11:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:11:43,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:43,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:11:43,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash -815951211, now seen corresponding path program 1 times [2022-12-13 17:11:43,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:43,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363388396] [2022-12-13 17:11:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:43,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:43,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363388396] [2022-12-13 17:11:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363388396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:11:43,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:11:43,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:11:43,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993707569] [2022-12-13 17:11:43,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:11:43,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:11:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:11:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:11:43,927 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:43,938 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-12-13 17:11:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:11:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 17:11:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:43,939 INFO L225 Difference]: With dead ends: 43 [2022-12-13 17:11:43,939 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 17:11:43,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:11:43,940 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:43,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:11:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 17:11:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 17:11:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-12-13 17:11:43,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-12-13 17:11:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:43,945 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-12-13 17:11:43,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-12-13 17:11:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:11:43,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:43,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:43,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:11:43,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978221, now seen corresponding path program 1 times [2022-12-13 17:11:43,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:43,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290790294] [2022-12-13 17:11:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:43,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:11:44,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:44,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290790294] [2022-12-13 17:11:44,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290790294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:44,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517060638] [2022-12-13 17:11:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:44,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:44,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:11:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 17:11:44,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:44,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:11:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:11:44,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 17:11:44,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 17:11:44,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-13 17:11:44,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:11:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:11:44,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:44,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-13 17:11:44,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-13 17:11:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:44,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517060638] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:44,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:44,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-13 17:11:44,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795391839] [2022-12-13 17:11:44,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:44,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:11:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:44,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:11:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:11:44,985 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:45,172 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-12-13 17:11:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:11:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 17:11:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:45,173 INFO L225 Difference]: With dead ends: 73 [2022-12-13 17:11:45,173 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 17:11:45,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2022-12-13 17:11:45,175 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:45,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 76 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:11:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 17:11:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-12-13 17:11:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-12-13 17:11:45,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-12-13 17:11:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:45,181 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-12-13 17:11:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-12-13 17:11:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 17:11:45,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:45,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:45,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:11:45,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:45,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1368311994, now seen corresponding path program 1 times [2022-12-13 17:11:45,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:45,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201092689] [2022-12-13 17:11:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:45,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:45,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:45,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201092689] [2022-12-13 17:11:45,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201092689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:45,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052116207] [2022-12-13 17:11:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:45,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:45,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:45,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:11:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:45,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 17:11:45,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:45,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:11:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:11:45,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 17:11:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:45,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:45,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-13 17:11:45,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 17:11:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:45,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052116207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:45,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:45,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 18 [2022-12-13 17:11:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389687538] [2022-12-13 17:11:45,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:11:45,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:11:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:11:45,938 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:46,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:46,119 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-12-13 17:11:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:11:46,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 17:11:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:46,120 INFO L225 Difference]: With dead ends: 56 [2022-12-13 17:11:46,120 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 17:11:46,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2022-12-13 17:11:46,121 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:46,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 95 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:11:46,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 17:11:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-12-13 17:11:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-12-13 17:11:46,126 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2022-12-13 17:11:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:46,126 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-12-13 17:11:46,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-12-13 17:11:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:11:46,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:46,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:46,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:11:46,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:46,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash 21305209, now seen corresponding path program 2 times [2022-12-13 17:11:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:46,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151825140] [2022-12-13 17:11:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:46,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:46,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151825140] [2022-12-13 17:11:46,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151825140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:46,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577425903] [2022-12-13 17:11:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:11:46,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:46,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:46,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:46,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:11:46,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:11:46,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:11:46,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:11:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:46,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:47,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577425903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:47,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:47,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-12-13 17:11:47,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049327299] [2022-12-13 17:11:47,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:47,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:11:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:11:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:11:47,061 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:47,294 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-12-13 17:11:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:11:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-13 17:11:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:47,295 INFO L225 Difference]: With dead ends: 97 [2022-12-13 17:11:47,295 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 17:11:47,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:11:47,297 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:47,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 100 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:11:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 17:11:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2022-12-13 17:11:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-12-13 17:11:47,305 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2022-12-13 17:11:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:47,305 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-12-13 17:11:47,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-12-13 17:11:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:11:47,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:47,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:47,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:11:47,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 17:11:47,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:47,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1279882925, now seen corresponding path program 3 times [2022-12-13 17:11:47,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:47,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321095537] [2022-12-13 17:11:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:47,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:11:48,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:48,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321095537] [2022-12-13 17:11:48,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321095537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:48,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183516032] [2022-12-13 17:11:48,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:11:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:48,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:48,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:11:48,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:11:48,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:11:48,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:11:48,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:48,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:11:48,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 17:11:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:11:48,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:11:48,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:11:48,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:11:48,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:11:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:11:48,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:49,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-13 17:11:49,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-12-13 17:11:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:11:49,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183516032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:49,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:49,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 25 [2022-12-13 17:11:49,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860719928] [2022-12-13 17:11:49,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:49,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:11:49,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:49,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:11:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:11:49,077 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:49,571 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-12-13 17:11:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:11:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:11:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:49,572 INFO L225 Difference]: With dead ends: 76 [2022-12-13 17:11:49,572 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 17:11:49,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 17:11:49,573 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:49,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 161 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:11:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 17:11:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2022-12-13 17:11:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-12-13 17:11:49,579 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2022-12-13 17:11:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:49,579 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-12-13 17:11:49,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-12-13 17:11:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 17:11:49,581 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:49,581 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:49,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 17:11:49,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:11:49,782 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:49,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1854428834, now seen corresponding path program 4 times [2022-12-13 17:11:49,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:49,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742282912] [2022-12-13 17:11:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:49,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:11:50,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742282912] [2022-12-13 17:11:50,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742282912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654407076] [2022-12-13 17:11:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:11:50,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:50,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:50,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:50,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:11:50,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:11:50,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:11:50,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 17:11:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:50,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:11:50,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 17:11:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:11:50,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:50,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-13 17:11:50,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 17:11:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:11:50,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654407076] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:50,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:50,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-12-13 17:11:50,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215775169] [2022-12-13 17:11:50,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:50,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:11:50,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:11:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 17:11:50,639 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:51,699 INFO L93 Difference]: Finished difference Result 174 states and 191 transitions. [2022-12-13 17:11:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 17:11:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-13 17:11:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:51,700 INFO L225 Difference]: With dead ends: 174 [2022-12-13 17:11:51,700 INFO L226 Difference]: Without dead ends: 145 [2022-12-13 17:11:51,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=859, Invalid=4993, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:11:51,702 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 283 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:51,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 201 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:11:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-13 17:11:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 70. [2022-12-13 17:11:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-12-13 17:11:51,715 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 49 [2022-12-13 17:11:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:51,715 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-12-13 17:11:51,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-12-13 17:11:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:11:51,716 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:51,716 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:51,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 17:11:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:51,918 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:51,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2084333679, now seen corresponding path program 5 times [2022-12-13 17:11:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:51,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340645851] [2022-12-13 17:11:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:51,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:11:52,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:52,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340645851] [2022-12-13 17:11:52,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340645851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:52,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899548281] [2022-12-13 17:11:52,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:11:52,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:52,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:52,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:52,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:11:52,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 17:11:52,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:11:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:11:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:11:52,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:11:52,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899548281] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:52,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:52,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-12-13 17:11:52,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408915571] [2022-12-13 17:11:52,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:52,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:11:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:11:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 17:11:52,946 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:53,185 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2022-12-13 17:11:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:11:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-13 17:11:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:53,186 INFO L225 Difference]: With dead ends: 117 [2022-12-13 17:11:53,186 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 17:11:53,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 17:11:53,187 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 263 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:53,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 158 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:11:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 17:11:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-12-13 17:11:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-12-13 17:11:53,193 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2022-12-13 17:11:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:53,193 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-12-13 17:11:53,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-12-13 17:11:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:11:53,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:53,193 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:53,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:11:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:53,394 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:53,394 INFO L85 PathProgramCache]: Analyzing trace with hash 419308485, now seen corresponding path program 6 times [2022-12-13 17:11:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:53,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981453959] [2022-12-13 17:11:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:11:53,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981453959] [2022-12-13 17:11:53,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981453959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601225198] [2022-12-13 17:11:53,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:11:53,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:53,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:53,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:53,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:11:54,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 17:11:54,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:11:54,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:11:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:54,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:11:54,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 17:11:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:11:54,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:11:54,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:11:54,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:11:54,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 17:11:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:11:54,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:54,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-13 17:11:54,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-12-13 17:11:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 17:11:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601225198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:54,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:54,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 34 [2022-12-13 17:11:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290982129] [2022-12-13 17:11:54,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 17:11:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 17:11:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 17:11:54,920 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:55,931 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2022-12-13 17:11:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:11:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-13 17:11:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:55,932 INFO L225 Difference]: With dead ends: 106 [2022-12-13 17:11:55,932 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 17:11:55,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=499, Invalid=2923, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:11:55,934 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 243 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:55,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 331 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 17:11:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 17:11:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2022-12-13 17:11:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-12-13 17:11:55,940 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 63 [2022-12-13 17:11:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:55,941 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-12-13 17:11:55,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-12-13 17:11:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 17:11:55,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:55,941 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:55,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:11:56,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:56,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1832115082, now seen corresponding path program 7 times [2022-12-13 17:11:56,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:56,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706511798] [2022-12-13 17:11:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:11:56,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:56,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706511798] [2022-12-13 17:11:56,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706511798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:56,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434106825] [2022-12-13 17:11:56,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:11:56,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:56,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:56,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:56,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:11:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:57,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 17:11:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:11:57,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:11:57,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 17:11:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:11:57,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:11:57,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-13 17:11:57,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 17:11:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:11:57,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434106825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:11:57,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:11:57,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 38 [2022-12-13 17:11:57,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037637392] [2022-12-13 17:11:57,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:11:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 17:11:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:11:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 17:11:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 17:11:57,622 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 38 states, 38 states have (on average 4.2631578947368425) internal successors, (162), 38 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:11:58,952 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-12-13 17:11:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 17:11:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.2631578947368425) internal successors, (162), 38 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-13 17:11:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:11:58,954 INFO L225 Difference]: With dead ends: 126 [2022-12-13 17:11:58,954 INFO L226 Difference]: Without dead ends: 124 [2022-12-13 17:11:58,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=924, Invalid=5882, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 17:11:58,956 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 277 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 17:11:58,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 300 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 17:11:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-13 17:11:58,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2022-12-13 17:11:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-12-13 17:11:58,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-12-13 17:11:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:11:58,964 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-12-13 17:11:58,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.2631578947368425) internal successors, (162), 38 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:11:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-12-13 17:11:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:11:58,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:11:58,965 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:11:58,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:11:59,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:59,167 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:11:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:11:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash -903520087, now seen corresponding path program 8 times [2022-12-13 17:11:59,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:11:59,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084769750] [2022-12-13 17:11:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:11:59,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:11:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:11:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:11:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:11:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084769750] [2022-12-13 17:11:59,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084769750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:11:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619348437] [2022-12-13 17:11:59,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:11:59,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:11:59,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:11:59,596 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:11:59,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:11:59,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:11:59,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:11:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:11:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:12:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:12:00,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:12:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:12:00,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619348437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:12:00,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:12:00,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-12-13 17:12:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102749189] [2022-12-13 17:12:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:12:00,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 17:12:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:12:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 17:12:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 17:12:00,414 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 43 states, 43 states have (on average 4.395348837209302) internal successors, (189), 43 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:12:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:12:00,761 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2022-12-13 17:12:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 17:12:00,761 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.395348837209302) internal successors, (189), 43 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-13 17:12:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:12:00,762 INFO L225 Difference]: With dead ends: 190 [2022-12-13 17:12:00,762 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 17:12:00,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 17:12:00,763 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 331 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:12:00,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 248 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:12:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 17:12:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-12-13 17:12:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:12:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-12-13 17:12:00,770 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2022-12-13 17:12:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:12:00,770 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-12-13 17:12:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.395348837209302) internal successors, (189), 43 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:12:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-12-13 17:12:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 17:12:00,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:12:00,771 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:12:00,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 17:12:00,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 17:12:00,972 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:12:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:12:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2118097373, now seen corresponding path program 9 times [2022-12-13 17:12:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:12:00,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995771825] [2022-12-13 17:12:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:12:00,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:12:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:12:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:12:01,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:12:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995771825] [2022-12-13 17:12:01,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995771825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:12:01,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166407724] [2022-12-13 17:12:01,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:12:01,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:12:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:12:01,767 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:12:01,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:12:02,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 17:12:02,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:12:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 17:12:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:12:02,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:12:02,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 17:12:02,341 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:12:02,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:12:02,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 17:12:02,378 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:12:02,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:12:02,396 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-13 17:12:02,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2022-12-13 17:12:02,471 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:12:02,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2022-12-13 17:12:02,496 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-13 17:12:02,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2022-12-13 17:12:02,621 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:12:02,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:12:02,645 INFO L321 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2022-12-13 17:12:02,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-12-13 17:12:02,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 17:12:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:12:02,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:12:52,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-12-13 17:12:52,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19698 treesize of output 19442 [2022-12-13 17:23:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:23:58,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166407724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:23:58,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:23:58,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 28] total 66 [2022-12-13 17:23:58,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370372339] [2022-12-13 17:23:58,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:23:58,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-13 17:23:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:23:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-13 17:23:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3838, Unknown=11, NotChecked=0, Total=4290 [2022-12-13 17:23:58,131 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 66 states, 66 states have (on average 3.409090909090909) internal successors, (225), 66 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:09,198 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2022-12-13 17:24:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-13 17:24:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.409090909090909) internal successors, (225), 66 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-12-13 17:24:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:09,199 INFO L225 Difference]: With dead ends: 305 [2022-12-13 17:24:09,199 INFO L226 Difference]: Without dead ends: 258 [2022-12-13 17:24:09,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4483 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=2188, Invalid=14313, Unknown=11, NotChecked=0, Total=16512 [2022-12-13 17:24:09,202 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1287 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:09,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 764 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 17:24:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-13 17:24:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 112. [2022-12-13 17:24:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.054054054054054) internal successors, (117), 111 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2022-12-13 17:24:09,215 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 83 [2022-12-13 17:24:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:09,215 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2022-12-13 17:24:09,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.409090909090909) internal successors, (225), 66 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2022-12-13 17:24:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 17:24:09,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:09,216 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:09,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 17:24:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 17:24:09,418 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:24:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1794183984, now seen corresponding path program 10 times [2022-12-13 17:24:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:09,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141180413] [2022-12-13 17:24:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:09,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:09,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141180413] [2022-12-13 17:24:09,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141180413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:09,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556357354] [2022-12-13 17:24:09,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:24:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:09,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:09,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:24:10,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:24:10,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 17:24:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:10,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:24:10,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 17:24:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:24:10,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:10,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-13 17:24:10,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 17:24:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:24:10,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556357354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:10,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:10,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 30 [2022-12-13 17:24:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344781450] [2022-12-13 17:24:10,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:10,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 17:24:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 17:24:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:24:10,495 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:12,082 INFO L93 Difference]: Finished difference Result 223 states and 240 transitions. [2022-12-13 17:24:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 17:24:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-13 17:24:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:12,084 INFO L225 Difference]: With dead ends: 223 [2022-12-13 17:24:12,084 INFO L226 Difference]: Without dead ends: 221 [2022-12-13 17:24:12,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 162 SyntacticMatches, 10 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=800, Invalid=8130, Unknown=0, NotChecked=0, Total=8930 [2022-12-13 17:24:12,087 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 199 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:12,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 398 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:24:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-12-13 17:24:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 118. [2022-12-13 17:24:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0598290598290598) internal successors, (124), 117 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-12-13 17:24:12,100 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 89 [2022-12-13 17:24:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:12,100 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-12-13 17:24:12,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-12-13 17:24:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-13 17:24:12,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:12,101 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:12,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:24:12,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:24:12,302 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:24:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 170065283, now seen corresponding path program 11 times [2022-12-13 17:24:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:12,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309338391] [2022-12-13 17:24:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:24:12,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309338391] [2022-12-13 17:24:12,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309338391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980056483] [2022-12-13 17:24:12,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:24:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:12,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:12,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:24:13,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-12-13 17:24:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:24:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:24:13,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:24:14,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980056483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:14,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:14,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2022-12-13 17:24:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151201112] [2022-12-13 17:24:14,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 17:24:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 17:24:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=1955, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 17:24:14,324 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 51 states, 51 states have (on average 4.627450980392157) internal successors, (236), 51 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:14,778 INFO L93 Difference]: Finished difference Result 189 states and 199 transitions. [2022-12-13 17:24:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 17:24:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.627450980392157) internal successors, (236), 51 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-12-13 17:24:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:14,779 INFO L225 Difference]: With dead ends: 189 [2022-12-13 17:24:14,779 INFO L226 Difference]: Without dead ends: 110 [2022-12-13 17:24:14,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=859, Invalid=2681, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 17:24:14,780 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 381 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:14,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 301 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:24:14,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-13 17:24:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2022-12-13 17:24:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.058252427184466) internal successors, (109), 103 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2022-12-13 17:24:14,791 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 95 [2022-12-13 17:24:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:14,791 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2022-12-13 17:24:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.627450980392157) internal successors, (236), 51 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2022-12-13 17:24:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 17:24:14,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:14,792 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:14,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:24:14,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:24:14,993 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:24:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash -100244553, now seen corresponding path program 12 times [2022-12-13 17:24:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:14,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021302414] [2022-12-13 17:24:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:24:15,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021302414] [2022-12-13 17:24:15,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021302414] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663141418] [2022-12-13 17:24:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:24:15,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:15,980 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:15,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:24:16,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-12-13 17:24:16,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 17:24:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:16,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:24:16,582 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:16,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2022-12-13 17:24:16,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 17:24:16,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:16,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2022-12-13 17:24:17,688 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-13 17:24:17,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-12-13 17:24:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 82 proven. 188 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 17:24:17,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:18,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-13 17:24:18,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-12-13 17:24:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 58 proven. 212 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 17:24:19,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663141418] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:19,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:19,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 26] total 67 [2022-12-13 17:24:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167445197] [2022-12-13 17:24:19,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:19,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 17:24:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 17:24:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=4062, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 17:24:19,371 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 67 states, 67 states have (on average 3.8507462686567164) internal successors, (258), 67 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:42,464 INFO L93 Difference]: Finished difference Result 339 states and 366 transitions. [2022-12-13 17:24:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-13 17:24:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.8507462686567164) internal successors, (258), 67 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-12-13 17:24:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:42,465 INFO L225 Difference]: With dead ends: 339 [2022-12-13 17:24:42,465 INFO L226 Difference]: Without dead ends: 280 [2022-12-13 17:24:42,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9440 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=3132, Invalid=29810, Unknown=0, NotChecked=0, Total=32942 [2022-12-13 17:24:42,469 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1148 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 3557 mSolverCounterSat, 423 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:42,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 1026 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3557 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-12-13 17:24:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-12-13 17:24:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 136. [2022-12-13 17:24:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0444444444444445) internal successors, (141), 135 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2022-12-13 17:24:42,495 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 103 [2022-12-13 17:24:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:42,495 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2022-12-13 17:24:42,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.8507462686567164) internal successors, (258), 67 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2022-12-13 17:24:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-13 17:24:42,496 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:42,496 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:42,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:24:42,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:24:42,697 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:24:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:42,699 INFO L85 PathProgramCache]: Analyzing trace with hash 940386024, now seen corresponding path program 13 times [2022-12-13 17:24:42,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:42,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238484228] [2022-12-13 17:24:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:24:43,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238484228] [2022-12-13 17:24:43,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238484228] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798464256] [2022-12-13 17:24:43,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:24:43,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:43,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:43,357 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:43,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:24:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 17:24:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:43,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:24:43,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 17:24:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:24:44,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:44,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-13 17:24:44,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 17:24:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:24:44,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798464256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:44,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:44,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 44 [2022-12-13 17:24:44,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049051981] [2022-12-13 17:24:44,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 17:24:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 17:24:44,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 17:24:44,256 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 44 states, 44 states have (on average 5.2272727272727275) internal successors, (230), 44 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:46,903 INFO L93 Difference]: Finished difference Result 284 states and 304 transitions. [2022-12-13 17:24:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-13 17:24:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.2272727272727275) internal successors, (230), 44 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-12-13 17:24:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:46,904 INFO L225 Difference]: With dead ends: 284 [2022-12-13 17:24:46,904 INFO L226 Difference]: Without dead ends: 282 [2022-12-13 17:24:46,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 194 SyntacticMatches, 8 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5425 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1330, Invalid=15182, Unknown=0, NotChecked=0, Total=16512 [2022-12-13 17:24:46,906 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 340 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:46,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 627 Invalid, 3209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 17:24:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-13 17:24:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 142. [2022-12-13 17:24:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.049645390070922) internal successors, (148), 141 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2022-12-13 17:24:46,927 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 109 [2022-12-13 17:24:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:46,927 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2022-12-13 17:24:46,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.2272727272727275) internal successors, (230), 44 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2022-12-13 17:24:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-13 17:24:46,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:46,927 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:46,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 17:24:47,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:24:47,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:24:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash 363021723, now seen corresponding path program 14 times [2022-12-13 17:24:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:47,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663932822] [2022-12-13 17:24:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:47,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 255 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:24:47,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663932822] [2022-12-13 17:24:47,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663932822] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13974477] [2022-12-13 17:24:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:24:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:47,840 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:47,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:24:47,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:24:47,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 17:24:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 310 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:24:48,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 310 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 17:24:49,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13974477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:49,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:49,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 61 [2022-12-13 17:24:49,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688308886] [2022-12-13 17:24:49,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 17:24:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 17:24:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=2826, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:24:49,233 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:24:49,748 INFO L93 Difference]: Finished difference Result 225 states and 235 transitions. [2022-12-13 17:24:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 17:24:49,749 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-12-13 17:24:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:24:49,749 INFO L225 Difference]: With dead ends: 225 [2022-12-13 17:24:49,750 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 17:24:49,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1173, Invalid=3797, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 17:24:49,750 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 473 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:24:49,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 356 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:24:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 17:24:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-12-13 17:24:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.048780487804878) internal successors, (129), 123 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2022-12-13 17:24:49,768 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 115 [2022-12-13 17:24:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:24:49,768 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2022-12-13 17:24:49,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:24:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2022-12-13 17:24:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-13 17:24:49,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:24:49,769 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:24:49,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 17:24:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:49,970 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:24:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:24:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash 108615887, now seen corresponding path program 15 times [2022-12-13 17:24:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:24:49,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890556934] [2022-12-13 17:24:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:24:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:24:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:24:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 17:24:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:24:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890556934] [2022-12-13 17:24:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890556934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:24:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082876777] [2022-12-13 17:24:51,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:24:51,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:24:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:51,162 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:24:51,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:24:52,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 17:24:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:24:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 17:24:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:24:52,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:24:52,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:24:52,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2022-12-13 17:24:52,509 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:24:52,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:24:52,522 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:24:52,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:24:52,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 17:24:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 74 proven. 300 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-13 17:24:53,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:24:55,026 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_372| Int) (v_ArrVal_975 Int)) (or (< (select (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_372|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_975) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 36)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_372|)))) is different from false [2022-12-13 17:24:55,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-12-13 17:24:55,036 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 17:24:55,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 122 [2022-12-13 17:24:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 74 proven. 295 refuted. 0 times theorem prover too weak. 68 trivial. 5 not checked. [2022-12-13 17:24:55,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082876777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:24:55,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:24:55,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 23] total 62 [2022-12-13 17:24:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879603881] [2022-12-13 17:24:55,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:24:55,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 17:24:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:24:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 17:24:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=3373, Unknown=1, NotChecked=118, Total=3782 [2022-12-13 17:24:55,293 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 62 states, 62 states have (on average 4.693548387096774) internal successors, (291), 62 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:00,300 INFO L93 Difference]: Finished difference Result 280 states and 303 transitions. [2022-12-13 17:25:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-13 17:25:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.693548387096774) internal successors, (291), 62 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-12-13 17:25:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:00,301 INFO L225 Difference]: With dead ends: 280 [2022-12-13 17:25:00,301 INFO L226 Difference]: Without dead ends: 270 [2022-12-13 17:25:00,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4565 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1512, Invalid=16581, Unknown=1, NotChecked=266, Total=18360 [2022-12-13 17:25:00,303 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 635 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:00,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1174 Invalid, 4591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 4075 Invalid, 0 Unknown, 234 Unchecked, 1.8s Time] [2022-12-13 17:25:00,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-12-13 17:25:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 130. [2022-12-13 17:25:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-12-13 17:25:00,323 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 123 [2022-12-13 17:25:00,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:00,323 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-12-13 17:25:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.693548387096774) internal successors, (291), 62 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-12-13 17:25:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-13 17:25:00,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:00,324 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:00,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 17:25:00,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:00,525 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:00,526 INFO L85 PathProgramCache]: Analyzing trace with hash -213259776, now seen corresponding path program 16 times [2022-12-13 17:25:00,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:00,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845739629] [2022-12-13 17:25:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:25:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845739629] [2022-12-13 17:25:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845739629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:25:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873789815] [2022-12-13 17:25:01,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:25:01,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:01,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:01,818 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:25:01,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 17:25:01,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:25:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:25:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 17:25:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:01,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:25:02,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 17:25:02,746 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-13 17:25:02,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-12-13 17:25:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:25:02,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:03,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-13 17:25:03,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 17:25:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 17:25:03,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873789815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:25:03,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:25:03,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 25] total 50 [2022-12-13 17:25:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983042691] [2022-12-13 17:25:03,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:25:03,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 17:25:03,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:25:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 17:25:03,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2254, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 17:25:03,060 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 50 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:11,063 INFO L93 Difference]: Finished difference Result 366 states and 389 transitions. [2022-12-13 17:25:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-12-13 17:25:11,063 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 50 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-12-13 17:25:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:11,065 INFO L225 Difference]: With dead ends: 366 [2022-12-13 17:25:11,065 INFO L226 Difference]: Without dead ends: 364 [2022-12-13 17:25:11,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 235 SyntacticMatches, 7 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13550 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3061, Invalid=35945, Unknown=0, NotChecked=0, Total=39006 [2022-12-13 17:25:11,068 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 930 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 3893 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 4229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 3893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:11,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 764 Invalid, 4229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 3893 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 17:25:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-12-13 17:25:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 136. [2022-12-13 17:25:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0444444444444445) internal successors, (141), 135 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2022-12-13 17:25:11,091 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 129 [2022-12-13 17:25:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:11,091 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2022-12-13 17:25:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 50 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2022-12-13 17:25:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-13 17:25:11,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:11,092 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:11,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 17:25:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:11,293 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:11,294 INFO L85 PathProgramCache]: Analyzing trace with hash -929605965, now seen corresponding path program 17 times [2022-12-13 17:25:11,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:11,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827692549] [2022-12-13 17:25:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:11,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 377 proven. 133 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 17:25:12,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827692549] [2022-12-13 17:25:12,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827692549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:25:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867219545] [2022-12-13 17:25:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:25:12,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:12,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:12,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:25:12,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_460303f7-850a-471c-bd7c-0ee55f10e22c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 17:25:14,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-13 17:25:14,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:25:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 17:25:14,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:14,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 17:25:14,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-13 17:25:14,445 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:25:14,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:25:14,461 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:25:14,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:25:14,505 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:25:14,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:25:14,517 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:25:14,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:25:14,564 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 17:25:14,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-13 17:25:14,607 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-12-13 17:25:14,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2022-12-13 17:25:15,214 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 17:25:15,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 10 [2022-12-13 17:25:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 244 proven. 126 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-12-13 17:25:15,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:18,337 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_451| Int) (v_ArrVal_1188 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int) (v_ArrVal_1190 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_452|)) (< (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_1188) (+ (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_452|)) v_ArrVal_1190) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_451|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_452| 1) |v_ULTIMATE.start_main_~i~0#1_451|)))) is different from false [2022-12-13 17:25:40,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-12-13 17:25:40,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139762 treesize of output 139250