./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0 --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 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:41:17,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:41:17,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:41:17,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:41:17,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:41:17,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:41:17,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:41:17,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:41:17,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:41:17,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:41:17,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:41:17,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:41:17,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:41:17,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:41:17,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:41:17,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:41:17,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:41:17,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:41:17,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:41:17,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:41:17,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:41:17,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:41:17,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:41:17,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:41:17,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:41:17,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:41:17,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:41:17,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:41:17,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:41:17,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:41:17,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:41:17,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:41:17,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:41:17,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:41:17,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:41:17,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:41:17,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:41:17,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:41:17,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:41:17,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:41:17,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:41:17,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:41:17,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:41:17,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:41:17,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:41:17,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:41:17,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:41:17,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:41:17,953 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:41:17,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:41:17,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:41:17,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:41:17,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:41:17,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:41:17,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:41:17,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:41:17,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:41:17,956 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:41:17,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:41:17,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:41:17,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:41:17,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:41:17,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:41:17,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:41:17,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:41:17,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:41:17,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:41:17,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:41:17,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:41:17,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:41:17,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:41:17,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:41:17,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:41:17,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:41:17,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2021-11-22 14:41:18,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:41:18,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:41:18,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:41:18,271 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:41:18,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:41:18,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/loops-crafted-1/in-de41.c [2021-11-22 14:41:18,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/data/192fb2be0/7885759e8f454854b69dc460dfcf2362/FLAG626e56f3c [2021-11-22 14:41:18,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:41:18,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/sv-benchmarks/c/loops-crafted-1/in-de41.c [2021-11-22 14:41:18,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/data/192fb2be0/7885759e8f454854b69dc460dfcf2362/FLAG626e56f3c [2021-11-22 14:41:19,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/data/192fb2be0/7885759e8f454854b69dc460dfcf2362 [2021-11-22 14:41:19,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:41:19,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:41:19,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:41:19,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:41:19,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:41:19,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff0a1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19, skipping insertion in model container [2021-11-22 14:41:19,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:41:19,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:41:19,443 WARN L230 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_e98677e1-a7ff-41bc-9d56-01faaa204296/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2021-11-22 14:41:19,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:41:19,476 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:41:19,488 WARN L230 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_e98677e1-a7ff-41bc-9d56-01faaa204296/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2021-11-22 14:41:19,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:41:19,506 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:41:19,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19 WrapperNode [2021-11-22 14:41:19,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:41:19,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:41:19,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:41:19,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:41:19,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,541 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-11-22 14:41:19,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:41:19,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:41:19,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:41:19,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:41:19,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:41:19,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:41:19,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:41:19,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:41:19,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (1/1) ... [2021-11-22 14:41:19,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:41:19,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:19,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:41:19,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:41:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:41:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:41:19,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:41:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:41:19,716 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:41:19,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:41:19,891 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:41:19,896 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:41:19,897 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 14:41:19,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:19 BoogieIcfgContainer [2021-11-22 14:41:19,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:41:19,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:41:19,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:41:19,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:41:19,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:41:19" (1/3) ... [2021-11-22 14:41:19,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7254dd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:19, skipping insertion in model container [2021-11-22 14:41:19,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:19" (2/3) ... [2021-11-22 14:41:19,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7254dd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:19, skipping insertion in model container [2021-11-22 14:41:19,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:19" (3/3) ... [2021-11-22 14:41:19,913 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de41.c [2021-11-22 14:41:19,922 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:41:19,922 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:41:19,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:41:20,002 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 14:41:20,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:41:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) [2021-11-22 14:41:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 14:41:20,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:20,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:20,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2021-11-22 14:41:20,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:20,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726252947] [2021-11-22 14:41:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:20,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:20,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726252947] [2021-11-22 14:41:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726252947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:20,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:20,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:41:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886910514] [2021-11-22 14:41:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:20,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:41:20,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:20,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:41:20,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:41:20,298 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-22 14:41:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:20,319 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-11-22 14:41:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:41:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-11-22 14:41:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:20,329 INFO L225 Difference]: With dead ends: 27 [2021-11-22 14:41:20,330 INFO L226 Difference]: Without dead ends: 11 [2021-11-22 14:41:20,333 INFO L932 BasicCegarLoop]: 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 [2021-11-22 14:41:20,337 INFO L933 BasicCegarLoop]: 18 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, 18 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 [2021-11-22 14:41:20,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:41:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-22 14:41:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-22 14:41:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-11-22 14:41:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-22 14:41:20,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2021-11-22 14:41:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:20,382 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-22 14:41:20,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-22 14:41:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-22 14:41:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 14:41:20,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:20,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:20,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:41:20,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2021-11-22 14:41:20,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:20,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395664329] [2021-11-22 14:41:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:20,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:20,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:20,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395664329] [2021-11-22 14:41:20,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395664329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:20,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:20,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:41:20,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393933621] [2021-11-22 14:41:20,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:20,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:41:20,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:41:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:41:20,913 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-22 14:41:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:21,034 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2021-11-22 14:41:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:41:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2021-11-22 14:41:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:21,036 INFO L225 Difference]: With dead ends: 29 [2021-11-22 14:41:21,036 INFO L226 Difference]: Without dead ends: 17 [2021-11-22 14:41:21,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:41:21,044 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:21,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-22 14:41:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-22 14:41:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-11-22 14:41:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-22 14:41:21,055 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2021-11-22 14:41:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:21,056 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-22 14:41:21,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-22 14:41:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-22 14:41:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 14:41:21,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:21,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:21,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:41:21,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2021-11-22 14:41:21,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:21,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721192795] [2021-11-22 14:41:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:21,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:21,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:21,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721192795] [2021-11-22 14:41:21,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721192795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758236739] [2021-11-22 14:41:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:21,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:21,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:21,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:41:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:41:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:21,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:21,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758236739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:21,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-22 14:41:21,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70392277] [2021-11-22 14:41:21,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:21,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:41:21,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:41:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:41:21,419 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2021-11-22 14:41:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:21,631 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2021-11-22 14:41:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:41:21,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 11 [2021-11-22 14:41:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:21,635 INFO L225 Difference]: With dead ends: 65 [2021-11-22 14:41:21,636 INFO L226 Difference]: Without dead ends: 59 [2021-11-22 14:41:21,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:41:21,637 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:21,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 62 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-22 14:41:21,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2021-11-22 14:41:21,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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) [2021-11-22 14:41:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-11-22 14:41:21,647 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2021-11-22 14:41:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:21,647 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-11-22 14:41:21,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2021-11-22 14:41:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-11-22 14:41:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:41:21,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:21,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:21,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:21,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:21,866 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:21,866 INFO L85 PathProgramCache]: Analyzing trace with hash -491381764, now seen corresponding path program 1 times [2021-11-22 14:41:21,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:21,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871821385] [2021-11-22 14:41:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:21,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:21,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871821385] [2021-11-22 14:41:21,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871821385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:21,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:21,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:41:21,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354191485] [2021-11-22 14:41:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:21,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:41:21,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:41:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:41:21,929 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-22 14:41:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:21,967 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-11-22 14:41:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:41:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-11-22 14:41:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:21,969 INFO L225 Difference]: With dead ends: 34 [2021-11-22 14:41:21,969 INFO L226 Difference]: Without dead ends: 24 [2021-11-22 14:41:21,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:41:21,974 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:21,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:41:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-22 14:41:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-22 14:41:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-11-22 14:41:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-11-22 14:41:21,987 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2021-11-22 14:41:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:21,987 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-11-22 14:41:21,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-22 14:41:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-11-22 14:41:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 14:41:21,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:21,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:21,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:41:21,991 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2021-11-22 14:41:21,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:21,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61553526] [2021-11-22 14:41:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:21,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:22,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61553526] [2021-11-22 14:41:22,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61553526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831501006] [2021-11-22 14:41:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:22,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:22,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:22,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:22,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:41:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:41:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:22,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:22,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831501006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:22,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:22,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-22 14:41:22,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321379151] [2021-11-22 14:41:22,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:22,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:41:22,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:41:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:41:22,245 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-22 14:41:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:22,280 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-11-22 14:41:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:41:22,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-11-22 14:41:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:22,283 INFO L225 Difference]: With dead ends: 39 [2021-11-22 14:41:22,285 INFO L226 Difference]: Without dead ends: 35 [2021-11-22 14:41:22,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:41:22,287 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:22,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:41:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-22 14:41:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-22 14:41:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 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) [2021-11-22 14:41:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-11-22 14:41:22,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2021-11-22 14:41:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:22,299 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-11-22 14:41:22,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-22 14:41:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-11-22 14:41:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:41:22,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:22,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:22,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:22,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:22,521 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2021-11-22 14:41:22,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:22,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344454387] [2021-11-22 14:41:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:22,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:22,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344454387] [2021-11-22 14:41:22,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344454387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379576389] [2021-11-22 14:41:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:22,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:22,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:22,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:22,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:41:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 14:41:22,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:23,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:23,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379576389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:23,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:23,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-11-22 14:41:23,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485579711] [2021-11-22 14:41:23,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:23,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:41:23,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:41:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:41:23,756 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 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) [2021-11-22 14:41:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:24,847 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-11-22 14:41:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 14:41:24,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 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 14 [2021-11-22 14:41:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:24,853 INFO L225 Difference]: With dead ends: 77 [2021-11-22 14:41:24,853 INFO L226 Difference]: Without dead ends: 71 [2021-11-22 14:41:24,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-11-22 14:41:24,854 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:24,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 64 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:41:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-22 14:41:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2021-11-22 14:41:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 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) [2021-11-22 14:41:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2021-11-22 14:41:24,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 14 [2021-11-22 14:41:24,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:24,873 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2021-11-22 14:41:24,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 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) [2021-11-22 14:41:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2021-11-22 14:41:24,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:41:24,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:24,875 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:24,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:25,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:25,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2067097458, now seen corresponding path program 2 times [2021-11-22 14:41:25,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081242372] [2021-11-22 14:41:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:25,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:25,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:25,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081242372] [2021-11-22 14:41:25,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081242372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:25,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912727944] [2021-11-22 14:41:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:41:25,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:25,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:25,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:25,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:41:25,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:41:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:25,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:41:25,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:25,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:25,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912727944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:25,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:25,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-22 14:41:25,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142656465] [2021-11-22 14:41:25,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:25,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:41:25,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:41:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:41:25,463 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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) [2021-11-22 14:41:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:25,650 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-11-22 14:41:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 14:41:25,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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 14 [2021-11-22 14:41:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:25,652 INFO L225 Difference]: With dead ends: 74 [2021-11-22 14:41:25,652 INFO L226 Difference]: Without dead ends: 63 [2021-11-22 14:41:25,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:41:25,653 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:25,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 63 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-22 14:41:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2021-11-22 14:41:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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) [2021-11-22 14:41:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2021-11-22 14:41:25,662 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 14 [2021-11-22 14:41:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:25,662 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2021-11-22 14:41:25,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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) [2021-11-22 14:41:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2021-11-22 14:41:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:41:25,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:25,664 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:25,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:25,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:25,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2021-11-22 14:41:25,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:25,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269076671] [2021-11-22 14:41:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:25,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:25,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:25,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269076671] [2021-11-22 14:41:25,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269076671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:25,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679749972] [2021-11-22 14:41:25,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:41:25,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:25,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:25,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:41:26,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:41:26,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 14:41:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:26,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:26,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679749972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:26,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:26,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-22 14:41:26,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000625296] [2021-11-22 14:41:26,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:26,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 14:41:26,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 14:41:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:41:26,219 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2021-11-22 14:41:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:27,167 INFO L93 Difference]: Finished difference Result 166 states and 229 transitions. [2021-11-22 14:41:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 14:41:27,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 14 [2021-11-22 14:41:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:27,169 INFO L225 Difference]: With dead ends: 166 [2021-11-22 14:41:27,170 INFO L226 Difference]: Without dead ends: 156 [2021-11-22 14:41:27,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-11-22 14:41:27,171 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 284 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:27,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 176 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:41:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-22 14:41:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 60. [2021-11-22 14:41:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 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) [2021-11-22 14:41:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2021-11-22 14:41:27,199 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 14 [2021-11-22 14:41:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:27,199 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2021-11-22 14:41:27,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2021-11-22 14:41:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2021-11-22 14:41:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:41:27,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:27,202 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:27,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:27,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:27,411 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2021-11-22 14:41:27,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:27,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274043081] [2021-11-22 14:41:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:27,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:27,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274043081] [2021-11-22 14:41:27,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274043081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:27,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345273932] [2021-11-22 14:41:27,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:41:27,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:27,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:27,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:27,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:41:27,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:41:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:41:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:27,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:27,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345273932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:27,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:27,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-22 14:41:27,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562036369] [2021-11-22 14:41:27,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:27,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:41:27,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:41:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:41:27,623 INFO L87 Difference]: Start difference. First operand 60 states and 83 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) [2021-11-22 14:41:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:27,646 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2021-11-22 14:41:27,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:41:27,647 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 [2021-11-22 14:41:27,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:27,648 INFO L225 Difference]: With dead ends: 70 [2021-11-22 14:41:27,648 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 14:41:27,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:41:27,652 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:27,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:41:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 14:41:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 14:41:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 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) [2021-11-22 14:41:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2021-11-22 14:41:27,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 15 [2021-11-22 14:41:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:27,674 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2021-11-22 14:41:27,674 INFO L471 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) [2021-11-22 14:41:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2021-11-22 14:41:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 14:41:27,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:27,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:27,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:27,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:27,893 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2021-11-22 14:41:27,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:27,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534433828] [2021-11-22 14:41:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:27,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:27,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:27,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534433828] [2021-11-22 14:41:27,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534433828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:27,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621241659] [2021-11-22 14:41:27,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:41:27,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:28,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:28,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:28,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:41:28,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 14:41:28,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:28,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 14:41:28,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:28,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:28,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621241659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:28,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:28,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2021-11-22 14:41:28,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091501115] [2021-11-22 14:41:28,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:28,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 14:41:28,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:28,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 14:41:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:41:28,235 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2021-11-22 14:41:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:28,443 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2021-11-22 14:41:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:41:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 16 [2021-11-22 14:41:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:28,445 INFO L225 Difference]: With dead ends: 109 [2021-11-22 14:41:28,445 INFO L226 Difference]: Without dead ends: 93 [2021-11-22 14:41:28,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:41:28,446 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:28,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 90 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-22 14:41:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2021-11-22 14:41:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 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) [2021-11-22 14:41:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2021-11-22 14:41:28,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 16 [2021-11-22 14:41:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:28,459 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2021-11-22 14:41:28,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2021-11-22 14:41:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2021-11-22 14:41:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 14:41:28,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:28,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:28,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:28,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 14:41:28,677 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:28,678 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 3 times [2021-11-22 14:41:28,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:28,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037623673] [2021-11-22 14:41:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:28,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:41:28,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037623673] [2021-11-22 14:41:28,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037623673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516973015] [2021-11-22 14:41:28,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:41:28,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:28,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:28,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:28,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:41:28,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 14:41:28,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:28,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:41:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:41:28,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:41:28,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516973015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:28,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:28,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-11-22 14:41:28,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018462070] [2021-11-22 14:41:28,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:28,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:41:28,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:28,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:41:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:41:28,952 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-11-22 14:41:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:29,022 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2021-11-22 14:41:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:41:29,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 16 [2021-11-22 14:41:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:29,024 INFO L225 Difference]: With dead ends: 77 [2021-11-22 14:41:29,024 INFO L226 Difference]: Without dead ends: 73 [2021-11-22 14:41:29,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:41:29,025 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:29,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-22 14:41:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-22 14:41:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 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) [2021-11-22 14:41:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2021-11-22 14:41:29,047 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 16 [2021-11-22 14:41:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:29,048 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2021-11-22 14:41:29,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-11-22 14:41:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2021-11-22 14:41:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 14:41:29,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:29,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:29,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:29,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:29,278 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:29,278 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2021-11-22 14:41:29,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:29,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352586495] [2021-11-22 14:41:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:29,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:41:29,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:29,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352586495] [2021-11-22 14:41:29,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352586495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:29,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474671249] [2021-11-22 14:41:29,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:41:29,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:29,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:29,653 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:29,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:41:29,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:41:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-22 14:41:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:30,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:30,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474671249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:30,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:30,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 29 [2021-11-22 14:41:30,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264100913] [2021-11-22 14:41:30,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:30,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 14:41:30,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 14:41:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-11-22 14:41:30,650 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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) [2021-11-22 14:41:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:32,703 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2021-11-22 14:41:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 14:41:32,704 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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 18 [2021-11-22 14:41:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:32,705 INFO L225 Difference]: With dead ends: 152 [2021-11-22 14:41:32,705 INFO L226 Difference]: Without dead ends: 131 [2021-11-22 14:41:32,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=457, Invalid=1993, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:41:32,708 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:32,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 136 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 14:41:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-22 14:41:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-11-22 14:41:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 87 states have internal predecessors, (121), 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) [2021-11-22 14:41:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2021-11-22 14:41:32,730 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 18 [2021-11-22 14:41:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:32,730 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2021-11-22 14:41:32,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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) [2021-11-22 14:41:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2021-11-22 14:41:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 14:41:32,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:32,732 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:32,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:32,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:32,949 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash -922594724, now seen corresponding path program 4 times [2021-11-22 14:41:32,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:32,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647452060] [2021-11-22 14:41:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:32,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:33,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647452060] [2021-11-22 14:41:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647452060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707734328] [2021-11-22 14:41:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:41:33,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:33,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:33,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:41:33,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:41:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:33,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 14:41:33,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:33,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:33,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707734328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:33,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:33,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-22 14:41:33,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590700058] [2021-11-22 14:41:33,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:33,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 14:41:33,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 14:41:33,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:41:33,355 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2021-11-22 14:41:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:33,529 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2021-11-22 14:41:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 14:41:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) Word has length 18 [2021-11-22 14:41:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:33,533 INFO L225 Difference]: With dead ends: 115 [2021-11-22 14:41:33,533 INFO L226 Difference]: Without dead ends: 95 [2021-11-22 14:41:33,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:41:33,534 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:33,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 74 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-22 14:41:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2021-11-22 14:41:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.380281690140845) internal successors, (98), 71 states have internal predecessors, (98), 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) [2021-11-22 14:41:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2021-11-22 14:41:33,545 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 18 [2021-11-22 14:41:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:33,546 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2021-11-22 14:41:33,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2021-11-22 14:41:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2021-11-22 14:41:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:41:33,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:33,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:33,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:33,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:33,766 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 5 times [2021-11-22 14:41:33,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:33,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226901189] [2021-11-22 14:41:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:33,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:41:33,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226901189] [2021-11-22 14:41:33,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226901189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:33,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167481352] [2021-11-22 14:41:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:41:33,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:33,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:33,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:41:33,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-22 14:41:33,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:33,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:41:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:41:34,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:41:34,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167481352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:34,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:34,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2021-11-22 14:41:34,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808086757] [2021-11-22 14:41:34,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:34,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 14:41:34,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 14:41:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:41:34,083 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2021-11-22 14:41:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:34,157 INFO L93 Difference]: Finished difference Result 96 states and 133 transitions. [2021-11-22 14:41:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:41:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 19 [2021-11-22 14:41:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:34,158 INFO L225 Difference]: With dead ends: 96 [2021-11-22 14:41:34,158 INFO L226 Difference]: Without dead ends: 92 [2021-11-22 14:41:34,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:41:34,159 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:34,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:41:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-22 14:41:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2021-11-22 14:41:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 86 states have internal predecessors, (119), 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) [2021-11-22 14:41:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2021-11-22 14:41:34,171 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 19 [2021-11-22 14:41:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:34,171 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2021-11-22 14:41:34,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2021-11-22 14:41:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2021-11-22 14:41:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:41:34,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:34,173 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:34,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:34,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 14:41:34,393 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1793951343, now seen corresponding path program 5 times [2021-11-22 14:41:34,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:34,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382628197] [2021-11-22 14:41:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:34,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:34,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:34,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382628197] [2021-11-22 14:41:34,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382628197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:34,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76602117] [2021-11-22 14:41:34,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:41:34,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:34,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:34,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 14:41:34,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 14:41:34,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-22 14:41:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:34,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:34,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76602117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:34,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:34,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-22 14:41:34,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915471388] [2021-11-22 14:41:34,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:34,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 14:41:34,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 14:41:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-22 14:41:34,830 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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) [2021-11-22 14:41:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:40,369 INFO L93 Difference]: Finished difference Result 362 states and 466 transitions. [2021-11-22 14:41:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-22 14:41:40,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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) Word has length 19 [2021-11-22 14:41:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:40,372 INFO L225 Difference]: With dead ends: 362 [2021-11-22 14:41:40,372 INFO L226 Difference]: Without dead ends: 337 [2021-11-22 14:41:40,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1448, Invalid=3954, Unknown=0, NotChecked=0, Total=5402 [2021-11-22 14:41:40,376 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 514 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:40,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 423 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:41:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-22 14:41:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 104. [2021-11-22 14:41:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 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) [2021-11-22 14:41:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2021-11-22 14:41:40,394 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 19 [2021-11-22 14:41:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:40,394 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2021-11-22 14:41:40,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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) [2021-11-22 14:41:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2021-11-22 14:41:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 14:41:40,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:40,405 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:40,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:40,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:41:40,621 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 6 times [2021-11-22 14:41:40,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:40,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883656483] [2021-11-22 14:41:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:40,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:41:40,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:40,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883656483] [2021-11-22 14:41:40,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883656483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:40,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803036551] [2021-11-22 14:41:40,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:41:40,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:40,748 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:40,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 14:41:40,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-22 14:41:40,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:40,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 14:41:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:41:40,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:41:41,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803036551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:41,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:41,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-11-22 14:41:41,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095376153] [2021-11-22 14:41:41,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:41,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 14:41:41,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 14:41:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:41:41,022 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-11-22 14:41:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:41,409 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2021-11-22 14:41:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-22 14:41:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) Word has length 20 [2021-11-22 14:41:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:41,410 INFO L225 Difference]: With dead ends: 185 [2021-11-22 14:41:41,410 INFO L226 Difference]: Without dead ends: 166 [2021-11-22 14:41:41,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-11-22 14:41:41,412 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:41,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:41:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-22 14:41:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 100. [2021-11-22 14:41:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 99 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) [2021-11-22 14:41:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 134 transitions. [2021-11-22 14:41:41,427 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 134 transitions. Word has length 20 [2021-11-22 14:41:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:41,427 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 134 transitions. [2021-11-22 14:41:41,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2021-11-22 14:41:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 134 transitions. [2021-11-22 14:41:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 14:41:41,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:41,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:41,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-22 14:41:41,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:41:41,641 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 7 times [2021-11-22 14:41:41,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:41,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526303234] [2021-11-22 14:41:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:41,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:41:42,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526303234] [2021-11-22 14:41:42,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526303234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588626760] [2021-11-22 14:41:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:41:42,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:42,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:42,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:42,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 14:41:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-22 14:41:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:46,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:48,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588626760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:48,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:48,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 41 [2021-11-22 14:41:48,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148207484] [2021-11-22 14:41:48,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:48,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-22 14:41:48,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-22 14:41:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1306, Unknown=1, NotChecked=0, Total=1640 [2021-11-22 14:41:48,135 INFO L87 Difference]: Start difference. First operand 100 states and 134 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 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) [2021-11-22 14:41:50,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:41:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:59,233 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2021-11-22 14:41:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-22 14:41:59,234 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 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 22 [2021-11-22 14:41:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:59,235 INFO L225 Difference]: With dead ends: 198 [2021-11-22 14:41:59,235 INFO L226 Difference]: Without dead ends: 179 [2021-11-22 14:41:59,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1247, Invalid=4914, Unknown=1, NotChecked=0, Total=6162 [2021-11-22 14:41:59,240 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 260 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:59,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 161 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-22 14:41:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-22 14:41:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 124. [2021-11-22 14:41:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 123 states have internal predecessors, (165), 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) [2021-11-22 14:41:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2021-11-22 14:41:59,261 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 22 [2021-11-22 14:41:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:59,264 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2021-11-22 14:41:59,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 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) [2021-11-22 14:41:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2021-11-22 14:41:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 14:41:59,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:59,267 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:59,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:59,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:41:59,469 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1562904434, now seen corresponding path program 6 times [2021-11-22 14:41:59,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:59,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268790928] [2021-11-22 14:41:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:59,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:41:59,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268790928] [2021-11-22 14:41:59,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268790928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877265955] [2021-11-22 14:41:59,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:41:59,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:59,598 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:59,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 14:41:59,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 14:41:59,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 14:41:59,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:41:59,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:42:00,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877265955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:00,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:00,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-22 14:42:00,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309886643] [2021-11-22 14:42:00,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:00,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 14:42:00,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 14:42:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-11-22 14:42:00,017 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2021-11-22 14:42:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:42:00,565 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2021-11-22 14:42:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 14:42:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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 22 [2021-11-22 14:42:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:42:00,568 INFO L225 Difference]: With dead ends: 165 [2021-11-22 14:42:00,568 INFO L226 Difference]: Without dead ends: 140 [2021-11-22 14:42:00,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-11-22 14:42:00,569 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 141 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:42:00,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 98 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:42:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-22 14:42:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2021-11-22 14:42:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 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) [2021-11-22 14:42:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2021-11-22 14:42:00,588 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 22 [2021-11-22 14:42:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:42:00,589 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2021-11-22 14:42:00,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2021-11-22 14:42:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2021-11-22 14:42:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 14:42:00,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:42:00,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:00,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:00,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 14:42:00,817 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:42:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 7 times [2021-11-22 14:42:00,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:00,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847702018] [2021-11-22 14:42:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:00,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:42:01,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847702018] [2021-11-22 14:42:01,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847702018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752364065] [2021-11-22 14:42:01,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:42:01,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:01,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:01,006 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:01,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 14:42:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 14:42:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:42:01,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:42:01,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752364065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:01,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:01,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2021-11-22 14:42:01,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322160029] [2021-11-22 14:42:01,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:01,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 14:42:01,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:01,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 14:42:01,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:42:01,258 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-11-22 14:42:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:42:01,418 INFO L93 Difference]: Finished difference Result 134 states and 182 transitions. [2021-11-22 14:42:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:42:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) Word has length 22 [2021-11-22 14:42:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:42:01,420 INFO L225 Difference]: With dead ends: 134 [2021-11-22 14:42:01,420 INFO L226 Difference]: Without dead ends: 130 [2021-11-22 14:42:01,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:42:01,421 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:42:01,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 105 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:42:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-22 14:42:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2021-11-22 14:42:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3471074380165289) internal successors, (163), 121 states have internal predecessors, (163), 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) [2021-11-22 14:42:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2021-11-22 14:42:01,440 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 22 [2021-11-22 14:42:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:42:01,440 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2021-11-22 14:42:01,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-11-22 14:42:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2021-11-22 14:42:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:42:01,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:42:01,441 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:01,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:01,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:01,665 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:42:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 8 times [2021-11-22 14:42:01,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:01,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627712913] [2021-11-22 14:42:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:01,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:42:01,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:01,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627712913] [2021-11-22 14:42:01,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627712913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:01,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873948873] [2021-11-22 14:42:01,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:42:01,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:01,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:01,822 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:01,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 14:42:01,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:42:01,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 14:42:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:42:02,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:42:02,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873948873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:02,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:02,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2021-11-22 14:42:02,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175671675] [2021-11-22 14:42:02,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:02,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 14:42:02,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:02,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 14:42:02,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-11-22 14:42:02,383 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2021-11-22 14:42:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:42:03,727 INFO L93 Difference]: Finished difference Result 274 states and 331 transitions. [2021-11-22 14:42:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-22 14:42:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) Word has length 23 [2021-11-22 14:42:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:42:03,730 INFO L225 Difference]: With dead ends: 274 [2021-11-22 14:42:03,730 INFO L226 Difference]: Without dead ends: 247 [2021-11-22 14:42:03,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:42:03,732 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:42:03,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 170 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 14:42:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-22 14:42:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2021-11-22 14:42:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3115942028985508) internal successors, (181), 138 states have internal predecessors, (181), 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) [2021-11-22 14:42:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2021-11-22 14:42:03,761 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 23 [2021-11-22 14:42:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:42:03,761 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2021-11-22 14:42:03,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2021-11-22 14:42:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2021-11-22 14:42:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:42:03,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:42:03,762 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:03,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:03,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:03,989 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:42:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:03,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 3 times [2021-11-22 14:42:03,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:03,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002951543] [2021-11-22 14:42:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:03,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:04,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:04,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002951543] [2021-11-22 14:42:04,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002951543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:04,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810486129] [2021-11-22 14:42:04,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:42:04,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:04,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:04,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 14:42:04,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-22 14:42:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-22 14:42:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:04,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:05,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810486129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:05,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:05,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-11-22 14:42:05,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451696348] [2021-11-22 14:42:05,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:05,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 14:42:05,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 14:42:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 14:42:05,196 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2021-11-22 14:42:16,464 WARN L227 SmtUtils]: Spent 7.40s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:42:34,797 WARN L227 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:42:47,289 WARN L227 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:43:03,075 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:43:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:33,832 INFO L93 Difference]: Finished difference Result 847 states and 1132 transitions. [2021-11-22 14:43:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-22 14:43:33,833 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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 [2021-11-22 14:43:33,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:33,838 INFO L225 Difference]: With dead ends: 847 [2021-11-22 14:43:33,838 INFO L226 Difference]: Without dead ends: 807 [2021-11-22 14:43:33,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 85.0s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2021-11-22 14:43:33,854 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1623 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:33,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 1025 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-22 14:43:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-11-22 14:43:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 201. [2021-11-22 14:43:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.365) internal successors, (273), 200 states have internal predecessors, (273), 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) [2021-11-22 14:43:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2021-11-22 14:43:33,892 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 23 [2021-11-22 14:43:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:33,893 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2021-11-22 14:43:33,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2021-11-22 14:43:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2021-11-22 14:43:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:43:33,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:33,894 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:33,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-22 14:43:34,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-22 14:43:34,099 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 9 times [2021-11-22 14:43:34,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:34,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127795148] [2021-11-22 14:43:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:34,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:43:34,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:34,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127795148] [2021-11-22 14:43:34,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127795148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:34,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106307916] [2021-11-22 14:43:34,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:43:34,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:34,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:34,286 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:34,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 14:43:34,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 14:43:34,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 14:43:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-22 14:43:34,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-22 14:43:34,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106307916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:34,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:34,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2021-11-22 14:43:34,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148510273] [2021-11-22 14:43:34,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:34,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 14:43:34,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 14:43:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-11-22 14:43:34,665 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2021-11-22 14:43:37,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:43:40,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:43:42,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:43:43,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:43:46,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:46,493 INFO L93 Difference]: Finished difference Result 462 states and 656 transitions. [2021-11-22 14:43:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 14:43:46,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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 25 [2021-11-22 14:43:46,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:46,497 INFO L225 Difference]: With dead ends: 462 [2021-11-22 14:43:46,497 INFO L226 Difference]: Without dead ends: 456 [2021-11-22 14:43:46,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=433, Invalid=973, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 14:43:46,499 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 149 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 142 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:46,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 178 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 162 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2021-11-22 14:43:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-22 14:43:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-11-22 14:43:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.4766355140186915) internal successors, (474), 321 states have internal predecessors, (474), 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) [2021-11-22 14:43:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 474 transitions. [2021-11-22 14:43:46,560 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 474 transitions. Word has length 25 [2021-11-22 14:43:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:46,560 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 474 transitions. [2021-11-22 14:43:46,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2021-11-22 14:43:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 474 transitions. [2021-11-22 14:43:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:43:46,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:46,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:46,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:46,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:46,777 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 8 times [2021-11-22 14:43:46,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:46,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056724485] [2021-11-22 14:43:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:46,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:43:47,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:47,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056724485] [2021-11-22 14:43:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056724485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955764249] [2021-11-22 14:43:47,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:43:47,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:47,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:47,367 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:47,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 14:43:47,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:43:47,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 14:43:47,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:48,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:49,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955764249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:49,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:49,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 16] total 45 [2021-11-22 14:43:49,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494728033] [2021-11-22 14:43:49,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:49,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-22 14:43:49,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-22 14:43:49,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2021-11-22 14:43:49,600 INFO L87 Difference]: Start difference. First operand 322 states and 474 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 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) [2021-11-22 14:43:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:54,837 INFO L93 Difference]: Finished difference Result 454 states and 605 transitions. [2021-11-22 14:43:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-22 14:43:54,837 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 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 26 [2021-11-22 14:43:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:54,840 INFO L225 Difference]: With dead ends: 454 [2021-11-22 14:43:54,841 INFO L226 Difference]: Without dead ends: 434 [2021-11-22 14:43:54,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=757, Invalid=3533, Unknown=0, NotChecked=0, Total=4290 [2021-11-22 14:43:54,843 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 137 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:54,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 132 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 14:43:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-22 14:43:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 316. [2021-11-22 14:43:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.4825396825396826) internal successors, (467), 315 states have internal predecessors, (467), 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) [2021-11-22 14:43:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 467 transitions. [2021-11-22 14:43:54,906 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 467 transitions. Word has length 26 [2021-11-22 14:43:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:54,906 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 467 transitions. [2021-11-22 14:43:54,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 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) [2021-11-22 14:43:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 467 transitions. [2021-11-22 14:43:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:43:54,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:54,908 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:54,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:55,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-22 14:43:55,122 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1118982868, now seen corresponding path program 9 times [2021-11-22 14:43:55,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:55,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235584978] [2021-11-22 14:43:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:55,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 14:43:55,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235584978] [2021-11-22 14:43:55,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235584978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483813994] [2021-11-22 14:43:55,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:43:55,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:55,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:55,314 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:55,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 14:43:55,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 14:43:55,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-22 14:43:55,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 14:43:55,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 14:43:55,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483813994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:55,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:55,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2021-11-22 14:43:55,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215362943] [2021-11-22 14:43:55,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:55,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 14:43:55,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 14:43:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-11-22 14:43:55,869 INFO L87 Difference]: Start difference. First operand 316 states and 467 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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) [2021-11-22 14:43:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:57,150 INFO L93 Difference]: Finished difference Result 513 states and 664 transitions. [2021-11-22 14:43:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-22 14:43:57,151 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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 26 [2021-11-22 14:43:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:57,154 INFO L225 Difference]: With dead ends: 513 [2021-11-22 14:43:57,155 INFO L226 Difference]: Without dead ends: 446 [2021-11-22 14:43:57,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 14:43:57,159 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 92 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:57,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 425 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:43:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-22 14:43:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 299. [2021-11-22 14:43:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.4630872483221478) internal successors, (436), 298 states have internal predecessors, (436), 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) [2021-11-22 14:43:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 436 transitions. [2021-11-22 14:43:57,245 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 436 transitions. Word has length 26 [2021-11-22 14:43:57,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:57,245 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 436 transitions. [2021-11-22 14:43:57,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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) [2021-11-22 14:43:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 436 transitions. [2021-11-22 14:43:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 14:43:57,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:57,248 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:57,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-22 14:43:57,464 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115665, now seen corresponding path program 10 times [2021-11-22 14:43:57,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140563275] [2021-11-22 14:43:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:57,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:57,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140563275] [2021-11-22 14:43:57,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140563275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883801227] [2021-11-22 14:43:57,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:43:57,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:57,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:57,783 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-22 14:43:57,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:43:57,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-22 14:43:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:57,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:58,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883801227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:58,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:58,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-11-22 14:43:58,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74730547] [2021-11-22 14:43:58,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:58,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 14:43:58,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 14:43:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 14:43:58,569 INFO L87 Difference]: Start difference. First operand 299 states and 436 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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) [2021-11-22 14:44:13,215 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:44:40,362 WARN L227 SmtUtils]: Spent 11.59s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:45:06,597 WARN L227 SmtUtils]: Spent 11.98s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:45:21,235 WARN L227 SmtUtils]: Spent 10.98s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:45:42,913 WARN L227 SmtUtils]: Spent 9.30s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:45:52,902 WARN L227 SmtUtils]: Spent 7.17s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:46:12,094 WARN L227 SmtUtils]: Spent 7.47s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:46:40,036 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:46:53,872 WARN L227 SmtUtils]: Spent 6.73s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:47:18,953 WARN L227 SmtUtils]: Spent 7.04s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:49:13,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:49:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:49:27,796 INFO L93 Difference]: Finished difference Result 1275 states and 1693 transitions. [2021-11-22 14:49:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-22 14:49:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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) Word has length 27 [2021-11-22 14:49:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:49:27,803 INFO L225 Difference]: With dead ends: 1275 [2021-11-22 14:49:27,804 INFO L226 Difference]: Without dead ends: 1240 [2021-11-22 14:49:27,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9192 ImplicationChecksByTransitivity, 315.1s TimeCoverageRelationStatistics Valid=6620, Invalid=17559, Unknown=1, NotChecked=0, Total=24180 [2021-11-22 14:49:27,811 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1526 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 1172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:49:27,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 1428 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1172 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2021-11-22 14:49:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-22 14:49:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 322. [2021-11-22 14:49:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.4641744548286604) internal successors, (470), 321 states have internal predecessors, (470), 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) [2021-11-22 14:49:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 470 transitions. [2021-11-22 14:49:27,898 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 470 transitions. Word has length 27 [2021-11-22 14:49:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:49:27,898 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 470 transitions. [2021-11-22 14:49:27,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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) [2021-11-22 14:49:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 470 transitions. [2021-11-22 14:49:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 14:49:27,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:49:27,900 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:49:27,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-22 14:49:28,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-22 14:49:28,121 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:49:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:49:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 11 times [2021-11-22 14:49:28,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:49:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176757383] [2021-11-22 14:49:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:49:28,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:49:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:49:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:49:29,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:49:29,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176757383] [2021-11-22 14:49:29,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176757383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:49:29,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108065114] [2021-11-22 14:49:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:49:29,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:49:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:49:29,080 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:49:29,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-22 14:49:29,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 14:49:29,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:49:29,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-22 14:49:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:49:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:49:39,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:49:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:49:45,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108065114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:49:45,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:49:45,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 19] total 52 [2021-11-22 14:49:45,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094037107] [2021-11-22 14:49:45,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:49:45,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-22 14:49:45,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:49:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-22 14:49:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2231, Unknown=1, NotChecked=0, Total=2652 [2021-11-22 14:49:45,274 INFO L87 Difference]: Start difference. First operand 322 states and 470 transitions. Second operand has 52 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 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) [2021-11-22 14:49:47,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:50:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:41,420 INFO L93 Difference]: Finished difference Result 550 states and 698 transitions. [2021-11-22 14:50:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-22 14:50:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 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) Word has length 30 [2021-11-22 14:50:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:41,423 INFO L225 Difference]: With dead ends: 550 [2021-11-22 14:50:41,423 INFO L226 Difference]: Without dead ends: 532 [2021-11-22 14:50:41,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=1978, Invalid=11824, Unknown=4, NotChecked=0, Total=13806 [2021-11-22 14:50:41,426 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 225 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:41,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 347 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2021-11-22 14:50:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-22 14:50:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 340. [2021-11-22 14:50:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.4513274336283186) internal successors, (492), 339 states have internal predecessors, (492), 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) [2021-11-22 14:50:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 492 transitions. [2021-11-22 14:50:41,497 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 492 transitions. Word has length 30 [2021-11-22 14:50:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:41,497 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 492 transitions. [2021-11-22 14:50:41,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 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) [2021-11-22 14:50:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 492 transitions. [2021-11-22 14:50:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 14:50:41,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:41,498 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:41,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:41,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:50:41,699 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash 52816604, now seen corresponding path program 12 times [2021-11-22 14:50:41,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:50:41,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592630307] [2021-11-22 14:50:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:41,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:50:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-22 14:50:41,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:50:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592630307] [2021-11-22 14:50:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592630307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:50:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303439615] [2021-11-22 14:50:41,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:50:41,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:50:41,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:50:41,869 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:50:41,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-22 14:50:41,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 14:50:41,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:50:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 14:50:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-22 14:50:42,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-22 14:50:42,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303439615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:42,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:50:42,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 29 [2021-11-22 14:50:42,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20906478] [2021-11-22 14:50:42,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:42,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 14:50:42,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:50:42,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 14:50:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-11-22 14:50:42,357 INFO L87 Difference]: Start difference. First operand 340 states and 492 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 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) [2021-11-22 14:50:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:44,839 INFO L93 Difference]: Finished difference Result 555 states and 708 transitions. [2021-11-22 14:50:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-22 14:50:44,840 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 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 30 [2021-11-22 14:50:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:44,842 INFO L225 Difference]: With dead ends: 555 [2021-11-22 14:50:44,842 INFO L226 Difference]: Without dead ends: 474 [2021-11-22 14:50:44,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=327, Invalid=2123, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:50:44,843 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 142 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:44,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 640 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:50:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-22 14:50:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 324. [2021-11-22 14:50:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.4272445820433437) internal successors, (461), 323 states have internal predecessors, (461), 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) [2021-11-22 14:50:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 461 transitions. [2021-11-22 14:50:44,894 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 461 transitions. Word has length 30 [2021-11-22 14:50:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:44,894 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 461 transitions. [2021-11-22 14:50:44,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 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) [2021-11-22 14:50:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 461 transitions. [2021-11-22 14:50:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 14:50:44,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:44,895 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:44,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:45,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:50:45,095 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1397313151, now seen corresponding path program 13 times [2021-11-22 14:50:45,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:50:45,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846858037] [2021-11-22 14:50:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:45,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:50:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:50:45,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:50:45,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846858037] [2021-11-22 14:50:45,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846858037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:50:45,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111743350] [2021-11-22 14:50:45,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:50:45,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:50:45,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:50:45,497 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:50:45,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98677e1-a7ff-41bc-9d56-01faaa204296/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-22 14:50:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-22 14:50:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:50:45,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:50:46,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111743350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:46,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:50:46,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2021-11-22 14:50:46,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495376643] [2021-11-22 14:50:46,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:46,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-22 14:50:46,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:50:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-22 14:50:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2021-11-22 14:50:46,353 INFO L87 Difference]: Start difference. First operand 324 states and 461 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 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) [2021-11-22 14:51:08,988 WARN L227 SmtUtils]: Spent 11.37s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:51:26,790 WARN L227 SmtUtils]: Spent 9.17s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:51:52,747 WARN L227 SmtUtils]: Spent 18.67s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:52:12,325 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:52:42,169 WARN L227 SmtUtils]: Spent 15.33s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:53:08,140 WARN L227 SmtUtils]: Spent 11.46s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:53:39,132 WARN L227 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:54:02,348 WARN L227 SmtUtils]: Spent 14.59s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:54:17,952 WARN L227 SmtUtils]: Spent 9.61s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:54:25,209 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) is different from false [2021-11-22 14:54:41,437 WARN L227 SmtUtils]: Spent 9.83s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:54:53,908 WARN L227 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:55:27,670 WARN L227 SmtUtils]: Spent 18.48s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)