./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX --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 8b17e864f5b8145df67cb2b3dc045f82af33b1bd3c9c5e4c95275bcb385f71da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:36:14,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:36:14,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:36:14,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:36:14,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:36:14,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:36:14,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:36:14,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:36:14,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:36:14,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:36:14,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:36:14,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:36:14,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:36:14,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:36:14,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:36:14,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:36:14,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:36:14,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:36:14,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:36:14,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:36:14,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:36:14,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:36:14,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:36:14,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:36:14,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:36:14,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:36:14,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:36:14,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:36:14,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:36:14,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:36:14,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:36:14,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:36:14,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:36:14,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:36:14,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:36:14,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:36:14,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:36:14,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:36:14,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:36:14,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:36:14,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:36:14,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:36:14,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:36:14,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:36:14,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:36:14,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:36:14,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:36:14,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:36:14,863 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:36:14,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:36:14,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:36:14,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:36:14,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:36:14,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:36:14,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:36:14,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:36:14,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:36:14,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:36:14,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:36:14,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:36:14,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:36:14,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:36:14,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:36:14,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:36:14,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:36:14,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:36:14,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:36:14,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:36:14,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:36:14,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:36:14,871 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:36:14,874 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:36:14,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:36:14,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:36:14,875 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_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b17e864f5b8145df67cb2b3dc045f82af33b1bd3c9c5e4c95275bcb385f71da [2021-11-09 08:36:15,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:36:15,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:36:15,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:36:15,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:36:15,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:36:15,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/ldv-regression/test27-2.c [2021-11-09 08:36:15,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/data/2188cfa0e/b2bbb98fb5bb40bd9a6998ce14b39d78/FLAGb17c90526 [2021-11-09 08:36:15,777 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:36:15,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/sv-benchmarks/c/ldv-regression/test27-2.c [2021-11-09 08:36:15,784 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/data/2188cfa0e/b2bbb98fb5bb40bd9a6998ce14b39d78/FLAGb17c90526 [2021-11-09 08:36:16,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/data/2188cfa0e/b2bbb98fb5bb40bd9a6998ce14b39d78 [2021-11-09 08:36:16,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:36:16,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:36:16,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:36:16,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:36:16,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:36:16,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38915c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16, skipping insertion in model container [2021-11-09 08:36:16,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:36:16,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:36:16,368 WARN L228 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_2824944e-d1ea-4882-b8a0-be86edaf88e2/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-11-09 08:36:16,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:36:16,380 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:36:16,402 WARN L228 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_2824944e-d1ea-4882-b8a0-be86edaf88e2/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-11-09 08:36:16,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:36:16,419 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:36:16,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16 WrapperNode [2021-11-09 08:36:16,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:36:16,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:36:16,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:36:16,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:36:16,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:36:16,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:36:16,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:36:16,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:36:16,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:36:16,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:36:16,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:36:16,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:36:16,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (1/1) ... [2021-11-09 08:36:16,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:36:16,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:16,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:36:16,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:36:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:36:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:36:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:36:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:36:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:36:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:36:16,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:36:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:36:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:36:17,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:36:17,036 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 08:36:17,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:17 BoogieIcfgContainer [2021-11-09 08:36:17,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:36:17,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:36:17,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:36:17,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:36:17,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:36:16" (1/3) ... [2021-11-09 08:36:17,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136b5ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:17, skipping insertion in model container [2021-11-09 08:36:17,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:16" (2/3) ... [2021-11-09 08:36:17,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136b5ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:17, skipping insertion in model container [2021-11-09 08:36:17,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:17" (3/3) ... [2021-11-09 08:36:17,048 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2021-11-09 08:36:17,057 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:36:17,057 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:36:17,111 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:36:17,118 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 [2021-11-09 08:36:17,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:36:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2021-11-09 08:36:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:36:17,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:17,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:17,140 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:17,146 INFO L85 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2021-11-09 08:36:17,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:17,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046481293] [2021-11-09 08:36:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:17,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:17,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:17,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046481293] [2021-11-09 08:36:17,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046481293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:17,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:17,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:36:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583759651] [2021-11-09 08:36:17,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:17,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:17,422 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-11-09 08:36:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:17,455 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-11-09 08:36:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2021-11-09 08:36:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:17,489 INFO L225 Difference]: With dead ends: 32 [2021-11-09 08:36:17,489 INFO L226 Difference]: Without dead ends: 15 [2021-11-09 08:36:17,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-09 08:36:17,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-09 08:36:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-11-09 08:36:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-09 08:36:17,530 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-11-09 08:36:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:17,531 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-09 08:36:17,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-11-09 08:36:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-09 08:36:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:36:17,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:17,533 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:17,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:36:17,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:17,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2021-11-09 08:36:17,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:17,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997898864] [2021-11-09 08:36:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:17,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:17,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:17,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997898864] [2021-11-09 08:36:17,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997898864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:17,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759613443] [2021-11-09 08:36:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:17,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:17,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:17,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:36:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:36:17,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:17,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759613443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:17,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:17,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:36:17,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695600309] [2021-11-09 08:36:17,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:36:17,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:36:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:18,000 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-09 08:36:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:18,062 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-09 08:36:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:18,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 [2021-11-09 08:36:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:18,066 INFO L225 Difference]: With dead ends: 26 [2021-11-09 08:36:18,066 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 08:36:18,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 08:36:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-09 08:36:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-11-09 08:36:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-09 08:36:18,076 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-11-09 08:36:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:18,077 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-09 08:36:18,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-09 08:36:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-09 08:36:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:36:18,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:18,084 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:18,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:18,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:18,299 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2021-11-09 08:36:18,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:18,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751341086] [2021-11-09 08:36:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:18,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:18,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:18,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751341086] [2021-11-09 08:36:18,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751341086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:18,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402013686] [2021-11-09 08:36:18,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:18,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:18,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:18,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:18,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:36:18,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:18,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:18,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:36:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:18,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402013686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:18,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:18,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 08:36:18,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152204467] [2021-11-09 08:36:18,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:36:18,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:36:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:18,675 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-09 08:36:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:18,706 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-09 08:36:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:36:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 15 [2021-11-09 08:36:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:18,709 INFO L225 Difference]: With dead ends: 28 [2021-11-09 08:36:18,709 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 08:36:18,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 08:36:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-09 08:36:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-11-09 08:36:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-09 08:36:18,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-11-09 08:36:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:18,714 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-09 08:36:18,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-09 08:36:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-09 08:36:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:36:18,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:18,716 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:18,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:18,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:18,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:18,948 INFO L85 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2021-11-09 08:36:18,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:18,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006634553] [2021-11-09 08:36:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:18,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:19,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:19,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006634553] [2021-11-09 08:36:19,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006634553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:19,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821576623] [2021-11-09 08:36:19,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:36:19,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:19,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:19,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:36:19,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:36:19,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:19,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:36:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:19,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821576623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:19,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:19,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:36:19,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221686132] [2021-11-09 08:36:19,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:36:19,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:19,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:36:19,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:19,531 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-09 08:36:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:19,572 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-09 08:36:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:36:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 17 [2021-11-09 08:36:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:19,574 INFO L225 Difference]: With dead ends: 30 [2021-11-09 08:36:19,574 INFO L226 Difference]: Without dead ends: 21 [2021-11-09 08:36:19,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-09 08:36:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-09 08:36:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-11-09 08:36:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-09 08:36:19,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-11-09 08:36:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:19,580 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-09 08:36:19,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-09 08:36:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-09 08:36:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:36:19,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:19,582 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:19,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:19,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:19,799 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2021-11-09 08:36:19,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:19,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103925535] [2021-11-09 08:36:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:19,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:19,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:19,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103925535] [2021-11-09 08:36:19,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103925535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:19,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492513632] [2021-11-09 08:36:19,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:36:19,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:19,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:19,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:36:20,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:36:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:20,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:36:20,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:20,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492513632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:20,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:20,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 08:36:20,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10825063] [2021-11-09 08:36:20,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:36:20,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:36:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:36:20,192 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2021-11-09 08:36:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:20,245 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-09 08:36:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:36:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) Word has length 19 [2021-11-09 08:36:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:20,247 INFO L225 Difference]: With dead ends: 32 [2021-11-09 08:36:20,247 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 08:36:20,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:36:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 08:36:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-09 08:36:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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) [2021-11-09 08:36:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-09 08:36:20,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-11-09 08:36:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:20,262 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-09 08:36:20,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2021-11-09 08:36:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-09 08:36:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:36:20,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:20,266 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:20,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:20,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:20,484 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2021-11-09 08:36:20,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:20,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513842478] [2021-11-09 08:36:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:20,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:20,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:20,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513842478] [2021-11-09 08:36:20,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513842478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:20,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325987829] [2021-11-09 08:36:20,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:36:20,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:20,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:20,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:20,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:36:21,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:36:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:36:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:21,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325987829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:21,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:21,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 08:36:21,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627338922] [2021-11-09 08:36:21,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:36:21,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:36:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:36:21,429 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2021-11-09 08:36:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:21,491 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-09 08:36:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:36:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 21 [2021-11-09 08:36:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:21,495 INFO L225 Difference]: With dead ends: 34 [2021-11-09 08:36:21,495 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 08:36:21,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:36:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 08:36:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-09 08:36:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-11-09 08:36:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-09 08:36:21,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2021-11-09 08:36:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:21,502 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-09 08:36:21,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2021-11-09 08:36:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-09 08:36:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:36:21,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:21,504 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:21,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:21,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:21,719 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2021-11-09 08:36:21,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:21,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336509163] [2021-11-09 08:36:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:21,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:21,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:21,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336509163] [2021-11-09 08:36:21,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336509163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:21,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900592284] [2021-11-09 08:36:21,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:36:21,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:21,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:21,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:36:23,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 08:36:23,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:23,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:36:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:23,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900592284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:23,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:23,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 08:36:23,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044026842] [2021-11-09 08:36:23,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:36:23,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:36:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:36:23,712 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2021-11-09 08:36:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:23,761 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-09 08:36:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:36:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 23 [2021-11-09 08:36:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:23,765 INFO L225 Difference]: With dead ends: 36 [2021-11-09 08:36:23,766 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 08:36:23,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:36:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 08:36:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-11-09 08:36:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-11-09 08:36:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-09 08:36:23,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2021-11-09 08:36:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:23,774 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-09 08:36:23,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2021-11-09 08:36:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-09 08:36:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:36:23,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:23,776 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:23,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 08:36:23,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:36:23,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2021-11-09 08:36:23,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:23,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170270665] [2021-11-09 08:36:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:23,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:24,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:24,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170270665] [2021-11-09 08:36:24,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170270665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:24,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687727275] [2021-11-09 08:36:24,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:36:24,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:24,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:24,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:24,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:36:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:24,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:36:24,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:24,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687727275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:24,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:24,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 08:36:24,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082538227] [2021-11-09 08:36:24,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:36:24,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:36:24,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:24,355 INFO L87 Difference]: Start difference. First operand 26 states and 27 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) [2021-11-09 08:36:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:24,416 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-11-09 08:36:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:36:24,418 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 25 [2021-11-09 08:36:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:24,419 INFO L225 Difference]: With dead ends: 38 [2021-11-09 08:36:24,419 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 08:36:24,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 08:36:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-09 08:36:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-09 08:36:24,424 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2021-11-09 08:36:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:24,425 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-09 08:36:24,425 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) [2021-11-09 08:36:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-09 08:36:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:36:24,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:24,427 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:24,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:24,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:36:24,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2021-11-09 08:36:24,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:24,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396208865] [2021-11-09 08:36:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:24,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:24,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396208865] [2021-11-09 08:36:24,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396208865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:24,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698378742] [2021-11-09 08:36:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:36:24,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:24,813 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:24,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:36:24,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:36:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:36:24,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:25,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698378742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:25,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:25,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 08:36:25,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506431342] [2021-11-09 08:36:25,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:36:25,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:36:25,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:25,126 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2021-11-09 08:36:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:25,194 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-09 08:36:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:36:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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 [2021-11-09 08:36:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:25,200 INFO L225 Difference]: With dead ends: 40 [2021-11-09 08:36:25,202 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 08:36:25,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:36:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 08:36:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-09 08:36:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2021-11-09 08:36:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-09 08:36:25,213 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2021-11-09 08:36:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:25,215 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-09 08:36:25,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2021-11-09 08:36:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-09 08:36:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:36:25,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:25,219 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:25,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:25,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:25,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:25,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:25,439 INFO L85 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2021-11-09 08:36:25,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:25,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555162772] [2021-11-09 08:36:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:25,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:25,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:25,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555162772] [2021-11-09 08:36:25,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555162772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:25,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693092476] [2021-11-09 08:36:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:36:25,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:25,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:25,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:36:29,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 08:36:29,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:29,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:36:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693092476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:29,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:29,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 08:36:29,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996264153] [2021-11-09 08:36:29,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:36:29,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:29,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:36:29,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:36:29,260 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-11-09 08:36:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:29,332 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-11-09 08:36:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:36:29,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 29 [2021-11-09 08:36:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:29,334 INFO L225 Difference]: With dead ends: 41 [2021-11-09 08:36:29,335 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 08:36:29,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:36:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 08:36:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-09 08:36:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2021-11-09 08:36:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-09 08:36:29,345 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-11-09 08:36:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:29,345 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-09 08:36:29,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-11-09 08:36:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-09 08:36:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:36:29,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:29,348 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:29,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:29,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:36:29,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2021-11-09 08:36:29,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:29,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842857469] [2021-11-09 08:36:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:29,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:36:30,077 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:36:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:36:30,618 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:36:30,619 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-09 08:36:30,620 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:36:30,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:36:30,628 INFO L731 BasicCegarLoop]: Path program histogram: [10, 1] [2021-11-09 08:36:30,631 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 08:36:30,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 08:36:30 BoogieIcfgContainer [2021-11-09 08:36:30,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 08:36:30,720 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 08:36:30,720 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 08:36:30,720 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 08:36:30,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:17" (3/4) ... [2021-11-09 08:36:30,723 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-09 08:36:30,835 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 08:36:30,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 08:36:30,837 INFO L168 Benchmark]: Toolchain (without parser) took 14680.62 ms. Allocated memory was 94.4 MB in the beginning and 140.5 MB in the end (delta: 46.1 MB). Free memory was 59.5 MB in the beginning and 106.1 MB in the end (delta: -46.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:36:30,838 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 65.0 MB in the beginning and 64.9 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:36:30,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.13 ms. Allocated memory is still 94.4 MB. Free memory was 59.3 MB in the beginning and 69.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:36:30,840 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 67.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:36:30,840 INFO L168 Benchmark]: Boogie Preprocessor took 54.78 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 66.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:36:30,841 INFO L168 Benchmark]: RCFGBuilder took 515.21 ms. Allocated memory is still 94.4 MB. Free memory was 66.0 MB in the beginning and 53.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-09 08:36:30,841 INFO L168 Benchmark]: TraceAbstraction took 13678.70 ms. Allocated memory was 94.4 MB in the beginning and 140.5 MB in the end (delta: 46.1 MB). Free memory was 52.2 MB in the beginning and 110.3 MB in the end (delta: -58.1 MB). Peak memory consumption was 54.8 MB. Max. memory is 16.1 GB. [2021-11-09 08:36:30,842 INFO L168 Benchmark]: Witness Printer took 115.92 ms. Allocated memory is still 140.5 MB. Free memory was 110.3 MB in the beginning and 106.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-09 08:36:30,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 65.0 MB in the beginning and 64.9 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 263.13 ms. Allocated memory is still 94.4 MB. Free memory was 59.3 MB in the beginning and 69.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 67.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.78 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 66.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 515.21 ms. Allocated memory is still 94.4 MB. Free memory was 66.0 MB in the beginning and 53.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13678.70 ms. Allocated memory was 94.4 MB in the beginning and 140.5 MB in the end (delta: 46.1 MB). Free memory was 52.2 MB in the beginning and 110.3 MB in the end (delta: -58.1 MB). Peak memory consumption was 54.8 MB. Max. memory is 16.1 GB. * Witness Printer took 115.92 ms. Allocated memory is still 140.5 MB. Free memory was 110.3 MB in the beginning and 106.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 55]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] COND TRUE !check(&cont, i) [L55] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.5s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 126 SDtfs, 55 SDslu, 266 SDs, 0 SdLazy, 167 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=10, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 419 NumberOfCodeBlocks, 419 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 369 ConstructedInterpolants, 0 QuantifiedInterpolants, 767 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1404 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 0/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-09 08:36:30,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2824944e-d1ea-4882-b8a0-be86edaf88e2/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE