./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3 --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 f6bad48b4609958b21373d95937ae7f736890e97 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:40:07,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:40:07,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:40:07,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:40:07,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:40:07,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:40:07,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:40:07,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:40:07,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:40:07,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:40:07,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:40:07,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:40:07,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:40:07,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:40:07,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:40:07,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:40:07,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:40:07,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:40:07,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:40:07,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:40:07,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:40:07,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:40:07,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:40:07,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:40:07,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:40:07,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:40:07,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:40:07,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:40:07,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:40:07,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:40:07,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:40:07,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:40:07,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:40:07,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:40:07,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:40:07,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:40:07,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:40:07,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:40:07,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:40:07,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:40:07,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:40:07,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:40:07,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:40:07,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:40:07,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:40:07,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:40:07,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:40:07,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:40:07,963 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:40:07,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:40:07,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:40:07,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:40:07,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:40:07,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:40:07,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:40:07,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:40:07,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:40:07,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:40:07,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:40:07,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:40:07,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:40:07,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:40:07,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:40:07,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:40:07,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:40:07,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:40:07,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:40:07,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:40:07,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:40:07,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:40:07,979 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:40:07,981 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:40:07,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:40:07,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:40:07,982 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_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6bad48b4609958b21373d95937ae7f736890e97 [2021-10-15 19:40:08,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:40:08,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:40:08,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:40:08,258 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:40:08,270 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:40:08,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-10-15 19:40:08,341 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/data/e9d13b992/1c6cdd00c2b64625bcd34c941ff422e9/FLAGe6ccff0ae [2021-10-15 19:40:08,824 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:40:08,824 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-10-15 19:40:08,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/data/e9d13b992/1c6cdd00c2b64625bcd34c941ff422e9/FLAGe6ccff0ae [2021-10-15 19:40:09,158 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/data/e9d13b992/1c6cdd00c2b64625bcd34c941ff422e9 [2021-10-15 19:40:09,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:40:09,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:40:09,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:40:09,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:40:09,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:40:09,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@471ca104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09, skipping insertion in model container [2021-10-15 19:40:09,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:40:09,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:40:09,567 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_389d2822-62d3-4e0d-a0b0-da22c0e9f512/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-10-15 19:40:09,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:40:09,589 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:40:09,672 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_389d2822-62d3-4e0d-a0b0-da22c0e9f512/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-10-15 19:40:09,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:40:09,715 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:40:09,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09 WrapperNode [2021-10-15 19:40:09,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:40:09,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:40:09,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:40:09,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:40:09,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:40:09,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:40:09,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:40:09,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:40:09,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:40:09,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:40:09,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:40:09,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:40:09,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (1/1) ... [2021-10-15 19:40:09,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:40:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:09,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:40:09,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:40:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:40:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:40:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:40:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:40:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:40:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:40:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:40:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:40:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:40:09,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:40:10,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:40:10,261 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-15 19:40:10,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:10 BoogieIcfgContainer [2021-10-15 19:40:10,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:40:10,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:40:10,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:40:10,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:40:10,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:40:09" (1/3) ... [2021-10-15 19:40:10,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da614e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:40:10, skipping insertion in model container [2021-10-15 19:40:10,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:09" (2/3) ... [2021-10-15 19:40:10,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da614e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:40:10, skipping insertion in model container [2021-10-15 19:40:10,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:10" (3/3) ... [2021-10-15 19:40:10,271 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2021-10-15 19:40:10,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:40:10,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:40:10,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:40:10,332 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, mConcurrency=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 [2021-10-15 19:40:10,335 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:40:10,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 49 transitions, 98 flow [2021-10-15 19:40:10,408 INFO L129 PetriNetUnfolder]: 16/49 cut-off events. [2021-10-15 19:40:10,408 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:10,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 49 events. 16/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:40:10,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 49 transitions, 98 flow [2021-10-15 19:40:10,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 32 transitions, 64 flow [2021-10-15 19:40:10,443 INFO L129 PetriNetUnfolder]: 9/31 cut-off events. [2021-10-15 19:40:10,443 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:10,443 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:10,444 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:10,444 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash 564750711, now seen corresponding path program 1 times [2021-10-15 19:40:10,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:10,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154448623] [2021-10-15 19:40:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:10,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:10,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:10,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154448623] [2021-10-15 19:40:10,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154448623] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:10,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:40:10,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:40:10,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796162649] [2021-10-15 19:40:10,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:40:10,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:10,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:40:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:40:10,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 49 [2021-10-15 19:40:10,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 32 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:10,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:10,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 49 [2021-10-15 19:40:10,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:10,821 INFO L129 PetriNetUnfolder]: 5/32 cut-off events. [2021-10-15 19:40:10,822 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:10,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 32 events. 5/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 17 event pairs, 0 based on Foata normal form. 3/30 useless extension candidates. Maximal degree in co-relation 18. Up to 5 conditions per place. [2021-10-15 19:40:10,825 INFO L132 encePairwiseOnDemand]: 42/49 looper letters, 4 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2021-10-15 19:40:10,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 72 flow [2021-10-15 19:40:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:40:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:40:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2021-10-15 19:40:10,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2021-10-15 19:40:10,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2021-10-15 19:40:10,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2021-10-15 19:40:10,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:10,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2021-10-15 19:40:10,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2021-10-15 19:40:10,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2021-10-15 19:40:10,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2021-10-15 19:40:10,861 INFO L186 Difference]: Start difference. First operand has 24 places, 32 transitions, 64 flow. Second operand 3 states and 126 transitions. [2021-10-15 19:40:10,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 72 flow [2021-10-15 19:40:10,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:40:10,871 INFO L242 Difference]: Finished difference. Result has 27 places, 29 transitions, 68 flow [2021-10-15 19:40:10,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2021-10-15 19:40:10,874 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-10-15 19:40:10,875 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 68 flow [2021-10-15 19:40:10,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:10,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:10,876 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:10,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:40:10,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash -301628989, now seen corresponding path program 1 times [2021-10-15 19:40:10,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:10,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285938680] [2021-10-15 19:40:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:10,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:11,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:11,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285938680] [2021-10-15 19:40:11,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285938680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:11,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921313788] [2021-10-15 19:40:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:11,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:11,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:11,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:11,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:40:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:11,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:40:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:40:11,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921313788] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:11,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:11,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-10-15 19:40:11,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324807444] [2021-10-15 19:40:11,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:40:11,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:40:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:40:11,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 49 [2021-10-15 19:40:11,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:11,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:11,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 49 [2021-10-15 19:40:11,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:11,272 INFO L129 PetriNetUnfolder]: 7/46 cut-off events. [2021-10-15 19:40:11,272 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:40:11,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 46 events. 7/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 50. Up to 8 conditions per place. [2021-10-15 19:40:11,273 INFO L132 encePairwiseOnDemand]: 43/49 looper letters, 7 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2021-10-15 19:40:11,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 100 flow [2021-10-15 19:40:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:40:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:40:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2021-10-15 19:40:11,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7397959183673469 [2021-10-15 19:40:11,277 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 145 transitions. [2021-10-15 19:40:11,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 145 transitions. [2021-10-15 19:40:11,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:11,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 145 transitions. [2021-10-15 19:40:11,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-10-15 19:40:11,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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) [2021-10-15 19:40:11,282 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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) [2021-10-15 19:40:11,282 INFO L186 Difference]: Start difference. First operand has 27 places, 29 transitions, 68 flow. Second operand 4 states and 145 transitions. [2021-10-15 19:40:11,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 100 flow [2021-10-15 19:40:11,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:40:11,285 INFO L242 Difference]: Finished difference. Result has 30 places, 31 transitions, 90 flow [2021-10-15 19:40:11,286 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2021-10-15 19:40:11,286 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2021-10-15 19:40:11,286 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 90 flow [2021-10-15 19:40:11,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:11,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:11,287 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:11,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:11,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:11,503 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:11,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1646973933, now seen corresponding path program 1 times [2021-10-15 19:40:11,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:11,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311441515] [2021-10-15 19:40:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:11,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:11,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:11,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311441515] [2021-10-15 19:40:11,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311441515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:11,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947761819] [2021-10-15 19:40:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:11,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:11,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:11,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:40:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:40:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:40:11,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947761819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:11,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:11,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-10-15 19:40:11,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534460179] [2021-10-15 19:40:11,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:40:11,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:11,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:40:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:40:11,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 49 [2021-10-15 19:40:11,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:11,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:11,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 49 [2021-10-15 19:40:11,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:11,983 INFO L129 PetriNetUnfolder]: 7/47 cut-off events. [2021-10-15 19:40:11,984 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-10-15 19:40:11,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 47 events. 7/47 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 58. Up to 10 conditions per place. [2021-10-15 19:40:11,988 INFO L132 encePairwiseOnDemand]: 41/49 looper letters, 10 selfloop transitions, 7 changer transitions 0/36 dead transitions. [2021-10-15 19:40:11,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 134 flow [2021-10-15 19:40:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:40:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:40:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2021-10-15 19:40:11,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7061224489795919 [2021-10-15 19:40:11,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 173 transitions. [2021-10-15 19:40:11,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 173 transitions. [2021-10-15 19:40:11,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:11,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 173 transitions. [2021-10-15 19:40:12,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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) [2021-10-15 19:40:12,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 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) [2021-10-15 19:40:12,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 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) [2021-10-15 19:40:12,003 INFO L186 Difference]: Start difference. First operand has 30 places, 31 transitions, 90 flow. Second operand 5 states and 173 transitions. [2021-10-15 19:40:12,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 134 flow [2021-10-15 19:40:12,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:40:12,008 INFO L242 Difference]: Finished difference. Result has 34 places, 33 transitions, 116 flow [2021-10-15 19:40:12,008 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2021-10-15 19:40:12,008 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2021-10-15 19:40:12,009 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 116 flow [2021-10-15 19:40:12,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:12,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:12,013 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:12,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:12,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:12,234 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1683429605, now seen corresponding path program 1 times [2021-10-15 19:40:12,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:12,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992846614] [2021-10-15 19:40:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:12,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:40:12,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:12,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992846614] [2021-10-15 19:40:12,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992846614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:12,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010362500] [2021-10-15 19:40:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:12,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:12,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:12,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:40:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:40:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:40:12,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010362500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:12,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:12,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-10-15 19:40:12,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939672753] [2021-10-15 19:40:12,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:40:12,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:12,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:40:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:40:12,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 49 [2021-10-15 19:40:12,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 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) [2021-10-15 19:40:12,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:12,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 49 [2021-10-15 19:40:12,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:12,617 INFO L129 PetriNetUnfolder]: 7/49 cut-off events. [2021-10-15 19:40:12,617 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-10-15 19:40:12,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 49 events. 7/49 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 71. Up to 7 conditions per place. [2021-10-15 19:40:12,618 INFO L132 encePairwiseOnDemand]: 40/49 looper letters, 9 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2021-10-15 19:40:12,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 164 flow [2021-10-15 19:40:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:40:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:40:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2021-10-15 19:40:12,630 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2021-10-15 19:40:12,630 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 200 transitions. [2021-10-15 19:40:12,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 200 transitions. [2021-10-15 19:40:12,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:12,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 200 transitions. [2021-10-15 19:40:12,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 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) [2021-10-15 19:40:12,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 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) [2021-10-15 19:40:12,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 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) [2021-10-15 19:40:12,634 INFO L186 Difference]: Start difference. First operand has 34 places, 33 transitions, 116 flow. Second operand 6 states and 200 transitions. [2021-10-15 19:40:12,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 164 flow [2021-10-15 19:40:12,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 152 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 19:40:12,639 INFO L242 Difference]: Finished difference. Result has 38 places, 35 transitions, 149 flow [2021-10-15 19:40:12,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2021-10-15 19:40:12,640 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2021-10-15 19:40:12,640 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 149 flow [2021-10-15 19:40:12,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 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) [2021-10-15 19:40:12,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:12,641 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:12,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:12,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:12,855 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1715992049, now seen corresponding path program 2 times [2021-10-15 19:40:12,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:12,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984309567] [2021-10-15 19:40:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:12,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:40:12,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:12,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984309567] [2021-10-15 19:40:12,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984309567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:12,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705883618] [2021-10-15 19:40:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:40:12,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:12,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:12,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:12,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:40:13,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 19:40:13,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:13,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:40:13,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:40:13,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705883618] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:13,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:13,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-10-15 19:40:13,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28210363] [2021-10-15 19:40:13,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:40:13,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:40:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:40:13,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 49 [2021-10-15 19:40:13,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:13,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:13,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 49 [2021-10-15 19:40:13,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:13,208 INFO L129 PetriNetUnfolder]: 7/50 cut-off events. [2021-10-15 19:40:13,208 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-10-15 19:40:13,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 50 events. 7/50 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 90. Up to 12 conditions per place. [2021-10-15 19:40:13,210 INFO L132 encePairwiseOnDemand]: 41/49 looper letters, 12 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2021-10-15 19:40:13,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 197 flow [2021-10-15 19:40:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:40:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:40:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2021-10-15 19:40:13,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7061224489795919 [2021-10-15 19:40:13,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 173 transitions. [2021-10-15 19:40:13,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 173 transitions. [2021-10-15 19:40:13,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:13,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 173 transitions. [2021-10-15 19:40:13,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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) [2021-10-15 19:40:13,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 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) [2021-10-15 19:40:13,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 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) [2021-10-15 19:40:13,215 INFO L186 Difference]: Start difference. First operand has 38 places, 35 transitions, 149 flow. Second operand 5 states and 173 transitions. [2021-10-15 19:40:13,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 197 flow [2021-10-15 19:40:13,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 184 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 19:40:13,222 INFO L242 Difference]: Finished difference. Result has 41 places, 37 transitions, 170 flow [2021-10-15 19:40:13,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2021-10-15 19:40:13,223 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2021-10-15 19:40:13,223 INFO L470 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 170 flow [2021-10-15 19:40:13,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:13,226 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:13,226 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:13,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:13,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:13,449 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:13,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1604492065, now seen corresponding path program 1 times [2021-10-15 19:40:13,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:13,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66359479] [2021-10-15 19:40:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:13,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:14,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:14,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66359479] [2021-10-15 19:40:14,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66359479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:14,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688616834] [2021-10-15 19:40:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:14,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:14,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:14,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:40:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 88 conjunts are in the unsatisfiable core [2021-10-15 19:40:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:14,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:40:14,534 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:40:14,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-15 19:40:14,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:40:14,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:40:14,764 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:40:14,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-10-15 19:40:14,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-10-15 19:40:15,288 INFO L354 Elim1Store]: treesize reduction 159, result has 15.0 percent of original size [2021-10-15 19:40:15,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 119 [2021-10-15 19:40:15,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 101 [2021-10-15 19:40:15,335 INFO L354 Elim1Store]: treesize reduction 84, result has 21.5 percent of original size [2021-10-15 19:40:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 94 [2021-10-15 19:40:15,585 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-15 19:40:15,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 64 [2021-10-15 19:40:15,604 INFO L354 Elim1Store]: treesize reduction 59, result has 22.4 percent of original size [2021-10-15 19:40:15,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2021-10-15 19:40:15,617 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-15 19:40:15,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-10-15 19:40:15,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2021-10-15 19:40:15,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-10-15 19:40:15,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-10-15 19:40:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:40:16,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688616834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:16,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:16,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-10-15 19:40:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313254852] [2021-10-15 19:40:16,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-15 19:40:16,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-15 19:40:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2021-10-15 19:40:16,119 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2021-10-15 19:40:16,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 170 flow. Second operand has 38 states, 38 states have (on average 12.263157894736842) internal successors, (466), 38 states have internal predecessors, (466), 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) [2021-10-15 19:40:16,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:16,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2021-10-15 19:40:16,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:21,506 INFO L129 PetriNetUnfolder]: 23/146 cut-off events. [2021-10-15 19:40:21,506 INFO L130 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2021-10-15 19:40:21,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 146 events. 23/146 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 353 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 239. Up to 28 conditions per place. [2021-10-15 19:40:21,508 INFO L132 encePairwiseOnDemand]: 29/49 looper letters, 62 selfloop transitions, 54 changer transitions 0/120 dead transitions. [2021-10-15 19:40:21,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 120 transitions, 760 flow [2021-10-15 19:40:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-15 19:40:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-15 19:40:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 550 transitions. [2021-10-15 19:40:21,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.28061224489795916 [2021-10-15 19:40:21,512 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 550 transitions. [2021-10-15 19:40:21,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 550 transitions. [2021-10-15 19:40:21,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:21,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 550 transitions. [2021-10-15 19:40:21,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 13.75) internal successors, (550), 40 states have internal predecessors, (550), 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) [2021-10-15 19:40:21,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 49.0) internal successors, (2009), 41 states have internal predecessors, (2009), 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) [2021-10-15 19:40:21,520 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 49.0) internal successors, (2009), 41 states have internal predecessors, (2009), 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) [2021-10-15 19:40:21,520 INFO L186 Difference]: Start difference. First operand has 41 places, 37 transitions, 170 flow. Second operand 40 states and 550 transitions. [2021-10-15 19:40:21,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 120 transitions, 760 flow [2021-10-15 19:40:21,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 733 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-10-15 19:40:21,527 INFO L242 Difference]: Finished difference. Result has 90 places, 82 transitions, 557 flow [2021-10-15 19:40:21,527 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=557, PETRI_PLACES=90, PETRI_TRANSITIONS=82} [2021-10-15 19:40:21,528 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 66 predicate places. [2021-10-15 19:40:21,528 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 82 transitions, 557 flow [2021-10-15 19:40:21,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 12.263157894736842) internal successors, (466), 38 states have internal predecessors, (466), 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) [2021-10-15 19:40:21,528 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:21,528 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:21,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:21,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 19:40:21,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1202712617, now seen corresponding path program 2 times [2021-10-15 19:40:21,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:21,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867604828] [2021-10-15 19:40:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:21,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:40:21,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:21,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867604828] [2021-10-15 19:40:21,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867604828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:21,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535939409] [2021-10-15 19:40:21,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:40:21,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:21,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:21,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:40:22,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:40:22,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:40:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:40:22,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535939409] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:22,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:22,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2021-10-15 19:40:22,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842620638] [2021-10-15 19:40:22,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:40:22,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:40:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:40:22,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 49 [2021-10-15 19:40:22,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 82 transitions, 557 flow. Second operand has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 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) [2021-10-15 19:40:22,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:22,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 49 [2021-10-15 19:40:22,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:22,190 INFO L129 PetriNetUnfolder]: 17/135 cut-off events. [2021-10-15 19:40:22,191 INFO L130 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2021-10-15 19:40:22,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 135 events. 17/135 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 322 event pairs, 0 based on Foata normal form. 5/134 useless extension candidates. Maximal degree in co-relation 383. Up to 43 conditions per place. [2021-10-15 19:40:22,195 INFO L132 encePairwiseOnDemand]: 44/49 looper letters, 21 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2021-10-15 19:40:22,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 77 transitions, 590 flow [2021-10-15 19:40:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:40:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:40:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2021-10-15 19:40:22,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2021-10-15 19:40:22,198 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 199 transitions. [2021-10-15 19:40:22,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 199 transitions. [2021-10-15 19:40:22,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:22,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 199 transitions. [2021-10-15 19:40:22,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 states have internal predecessors, (199), 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) [2021-10-15 19:40:22,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 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) [2021-10-15 19:40:22,202 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 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) [2021-10-15 19:40:22,203 INFO L186 Difference]: Start difference. First operand has 90 places, 82 transitions, 557 flow. Second operand 6 states and 199 transitions. [2021-10-15 19:40:22,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 77 transitions, 590 flow [2021-10-15 19:40:22,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 533 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-10-15 19:40:22,218 INFO L242 Difference]: Finished difference. Result has 88 places, 77 transitions, 504 flow [2021-10-15 19:40:22,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=504, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2021-10-15 19:40:22,219 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 64 predicate places. [2021-10-15 19:40:22,219 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 504 flow [2021-10-15 19:40:22,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 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) [2021-10-15 19:40:22,219 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:22,220 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:22,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:22,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:40:22,433 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:22,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1296538005, now seen corresponding path program 3 times [2021-10-15 19:40:22,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:22,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442042559] [2021-10-15 19:40:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:22,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:40:22,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:22,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442042559] [2021-10-15 19:40:22,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442042559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:22,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036600985] [2021-10-15 19:40:22,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:40:22,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:22,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:22,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:40:22,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:40:22,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:22,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:40:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:40:22,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036600985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:22,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:22,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-10-15 19:40:22,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969173267] [2021-10-15 19:40:22,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:40:22,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:22,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:40:22,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:40:22,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 49 [2021-10-15 19:40:22,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 504 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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) [2021-10-15 19:40:22,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:22,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 49 [2021-10-15 19:40:22,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:23,068 INFO L129 PetriNetUnfolder]: 11/101 cut-off events. [2021-10-15 19:40:23,068 INFO L130 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2021-10-15 19:40:23,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 101 events. 11/101 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 2/99 useless extension candidates. Maximal degree in co-relation 298. Up to 15 conditions per place. [2021-10-15 19:40:23,070 INFO L132 encePairwiseOnDemand]: 40/49 looper letters, 11 selfloop transitions, 25 changer transitions 0/67 dead transitions. [2021-10-15 19:40:23,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 67 transitions, 495 flow [2021-10-15 19:40:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:40:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:40:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 330 transitions. [2021-10-15 19:40:23,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2021-10-15 19:40:23,073 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 330 transitions. [2021-10-15 19:40:23,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 330 transitions. [2021-10-15 19:40:23,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:23,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 330 transitions. [2021-10-15 19:40:23,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 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) [2021-10-15 19:40:23,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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) [2021-10-15 19:40:23,076 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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) [2021-10-15 19:40:23,076 INFO L186 Difference]: Start difference. First operand has 88 places, 77 transitions, 504 flow. Second operand 11 states and 330 transitions. [2021-10-15 19:40:23,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 67 transitions, 495 flow [2021-10-15 19:40:23,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 441 flow, removed 1 selfloop flow, removed 10 redundant places. [2021-10-15 19:40:23,083 INFO L242 Difference]: Finished difference. Result has 87 places, 67 transitions, 419 flow [2021-10-15 19:40:23,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=419, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2021-10-15 19:40:23,084 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 63 predicate places. [2021-10-15 19:40:23,084 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 419 flow [2021-10-15 19:40:23,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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) [2021-10-15 19:40:23,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:23,084 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:23,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:23,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:40:23,299 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1852007439, now seen corresponding path program 4 times [2021-10-15 19:40:23,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:23,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324229101] [2021-10-15 19:40:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:23,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:40:23,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:23,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324229101] [2021-10-15 19:40:23,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324229101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:23,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194134240] [2021-10-15 19:40:23,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:40:23,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:23,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:23,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:40:23,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:40:23,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:40:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:40:23,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194134240] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:23,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:23,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2021-10-15 19:40:23,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354462053] [2021-10-15 19:40:23,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:40:23,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:40:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:40:23,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 49 [2021-10-15 19:40:23,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 419 flow. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2021-10-15 19:40:23,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:23,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 49 [2021-10-15 19:40:23,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:23,705 INFO L129 PetriNetUnfolder]: 7/83 cut-off events. [2021-10-15 19:40:23,705 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2021-10-15 19:40:23,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 83 events. 7/83 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 4/85 useless extension candidates. Maximal degree in co-relation 234. Up to 16 conditions per place. [2021-10-15 19:40:23,707 INFO L132 encePairwiseOnDemand]: 44/49 looper letters, 15 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2021-10-15 19:40:23,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 63 transitions, 431 flow [2021-10-15 19:40:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:40:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:40:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2021-10-15 19:40:23,708 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2021-10-15 19:40:23,709 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 199 transitions. [2021-10-15 19:40:23,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 199 transitions. [2021-10-15 19:40:23,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:23,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 199 transitions. [2021-10-15 19:40:23,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 states have internal predecessors, (199), 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) [2021-10-15 19:40:23,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 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) [2021-10-15 19:40:23,711 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 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) [2021-10-15 19:40:23,711 INFO L186 Difference]: Start difference. First operand has 87 places, 67 transitions, 419 flow. Second operand 6 states and 199 transitions. [2021-10-15 19:40:23,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 63 transitions, 431 flow [2021-10-15 19:40:23,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 63 transitions, 366 flow, removed 0 selfloop flow, removed 14 redundant places. [2021-10-15 19:40:23,715 INFO L242 Difference]: Finished difference. Result has 79 places, 63 transitions, 347 flow [2021-10-15 19:40:23,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2021-10-15 19:40:23,716 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 55 predicate places. [2021-10-15 19:40:23,716 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 347 flow [2021-10-15 19:40:23,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2021-10-15 19:40:23,717 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:23,717 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:23,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:23,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:23,943 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash 466739754, now seen corresponding path program 1 times [2021-10-15 19:40:23,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:23,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376125382] [2021-10-15 19:40:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:23,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:40:24,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:24,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376125382] [2021-10-15 19:40:24,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376125382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:24,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130727814] [2021-10-15 19:40:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:24,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:24,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:24,286 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:24,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:40:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:24,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-15 19:40:24,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:24,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-15 19:40:24,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-15 19:40:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:40:24,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130727814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:24,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:24,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-10-15 19:40:24,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398650422] [2021-10-15 19:40:24,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-15 19:40:24,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-15 19:40:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-10-15 19:40:24,977 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2021-10-15 19:40:24,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 347 flow. Second operand has 27 states, 27 states have (on average 15.25925925925926) internal successors, (412), 27 states have internal predecessors, (412), 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) [2021-10-15 19:40:24,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:24,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2021-10-15 19:40:24,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:26,197 INFO L129 PetriNetUnfolder]: 11/139 cut-off events. [2021-10-15 19:40:26,197 INFO L130 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2021-10-15 19:40:26,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 139 events. 11/139 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 271 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 322. Up to 22 conditions per place. [2021-10-15 19:40:26,199 INFO L132 encePairwiseOnDemand]: 30/49 looper letters, 69 selfloop transitions, 45 changer transitions 0/119 dead transitions. [2021-10-15 19:40:26,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 119 transitions, 940 flow [2021-10-15 19:40:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-15 19:40:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-15 19:40:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 506 transitions. [2021-10-15 19:40:26,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3442176870748299 [2021-10-15 19:40:26,208 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 506 transitions. [2021-10-15 19:40:26,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 506 transitions. [2021-10-15 19:40:26,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:26,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 506 transitions. [2021-10-15 19:40:26,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 16.866666666666667) internal successors, (506), 30 states have internal predecessors, (506), 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) [2021-10-15 19:40:26,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 49.0) internal successors, (1519), 31 states have internal predecessors, (1519), 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) [2021-10-15 19:40:26,214 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 49.0) internal successors, (1519), 31 states have internal predecessors, (1519), 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) [2021-10-15 19:40:26,214 INFO L186 Difference]: Start difference. First operand has 79 places, 63 transitions, 347 flow. Second operand 30 states and 506 transitions. [2021-10-15 19:40:26,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 119 transitions, 940 flow [2021-10-15 19:40:26,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 119 transitions, 899 flow, removed 16 selfloop flow, removed 3 redundant places. [2021-10-15 19:40:26,220 INFO L242 Difference]: Finished difference. Result has 113 places, 91 transitions, 669 flow [2021-10-15 19:40:26,221 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=669, PETRI_PLACES=113, PETRI_TRANSITIONS=91} [2021-10-15 19:40:26,221 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 89 predicate places. [2021-10-15 19:40:26,221 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 91 transitions, 669 flow [2021-10-15 19:40:26,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 15.25925925925926) internal successors, (412), 27 states have internal predecessors, (412), 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) [2021-10-15 19:40:26,222 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:26,222 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:26,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:26,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:40:26,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:26,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1635684388, now seen corresponding path program 2 times [2021-10-15 19:40:26,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:26,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851546109] [2021-10-15 19:40:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:26,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:40:26,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:26,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851546109] [2021-10-15 19:40:26,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851546109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:26,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593031001] [2021-10-15 19:40:26,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:40:26,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:26,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:26,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:26,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:40:26,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:40:26,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:40:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 19:40:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593031001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:26,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:40:26,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-10-15 19:40:26,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262852219] [2021-10-15 19:40:26,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:40:26,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:40:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:40:26,891 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 49 [2021-10-15 19:40:26,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 91 transitions, 669 flow. Second operand has 7 states, 7 states have (on average 30.714285714285715) internal successors, (215), 7 states have internal predecessors, (215), 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) [2021-10-15 19:40:26,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:26,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 49 [2021-10-15 19:40:26,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:26,978 INFO L129 PetriNetUnfolder]: 6/116 cut-off events. [2021-10-15 19:40:26,979 INFO L130 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2021-10-15 19:40:26,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 116 events. 6/116 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 170 event pairs, 0 based on Foata normal form. 5/118 useless extension candidates. Maximal degree in co-relation 365. Up to 20 conditions per place. [2021-10-15 19:40:26,980 INFO L132 encePairwiseOnDemand]: 41/49 looper letters, 25 selfloop transitions, 9 changer transitions 24/85 dead transitions. [2021-10-15 19:40:26,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 85 transitions, 708 flow [2021-10-15 19:40:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:40:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:40:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2021-10-15 19:40:26,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.625 [2021-10-15 19:40:26,983 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 245 transitions. [2021-10-15 19:40:26,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 245 transitions. [2021-10-15 19:40:26,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:26,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 245 transitions. [2021-10-15 19:40:26,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 30.625) internal successors, (245), 8 states have internal predecessors, (245), 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) [2021-10-15 19:40:26,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 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) [2021-10-15 19:40:26,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 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) [2021-10-15 19:40:26,986 INFO L186 Difference]: Start difference. First operand has 113 places, 91 transitions, 669 flow. Second operand 8 states and 245 transitions. [2021-10-15 19:40:26,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 85 transitions, 708 flow [2021-10-15 19:40:26,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 85 transitions, 656 flow, removed 15 selfloop flow, removed 10 redundant places. [2021-10-15 19:40:26,993 INFO L242 Difference]: Finished difference. Result has 110 places, 61 transitions, 412 flow [2021-10-15 19:40:26,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=412, PETRI_PLACES=110, PETRI_TRANSITIONS=61} [2021-10-15 19:40:26,994 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 86 predicate places. [2021-10-15 19:40:26,994 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 61 transitions, 412 flow [2021-10-15 19:40:26,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.714285714285715) internal successors, (215), 7 states have internal predecessors, (215), 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) [2021-10-15 19:40:26,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:26,994 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:27,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:27,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:27,211 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash 737502328, now seen corresponding path program 3 times [2021-10-15 19:40:27,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:27,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134620412] [2021-10-15 19:40:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:27,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-15 19:40:27,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:27,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134620412] [2021-10-15 19:40:27,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134620412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:27,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318739001] [2021-10-15 19:40:27,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:40:27,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:27,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:27,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:40:27,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:40:27,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:40:27,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:40:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:40:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-15 19:40:27,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318739001] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:27,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:27,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-10-15 19:40:27,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910712879] [2021-10-15 19:40:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:40:27,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:40:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:40:27,648 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 49 [2021-10-15 19:40:27,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 61 transitions, 412 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2021-10-15 19:40:27,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:27,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 49 [2021-10-15 19:40:27,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:27,661 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-10-15 19:40:27,661 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 19:40:27,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 10 events. 0/10 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:40:27,661 INFO L132 encePairwiseOnDemand]: 46/49 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-10-15 19:40:27,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 10 transitions, 42 flow [2021-10-15 19:40:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:40:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:40:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2021-10-15 19:40:27,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8010204081632653 [2021-10-15 19:40:27,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 157 transitions. [2021-10-15 19:40:27,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 157 transitions. [2021-10-15 19:40:27,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:27,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 157 transitions. [2021-10-15 19:40:27,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2021-10-15 19:40:27,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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) [2021-10-15 19:40:27,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 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) [2021-10-15 19:40:27,665 INFO L186 Difference]: Start difference. First operand has 110 places, 61 transitions, 412 flow. Second operand 4 states and 157 transitions. [2021-10-15 19:40:27,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 10 transitions, 42 flow [2021-10-15 19:40:27,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 10 transitions, 37 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:40:27,666 INFO L242 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2021-10-15 19:40:27,666 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2021-10-15 19:40:27,666 INFO L334 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2021-10-15 19:40:27,667 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2021-10-15 19:40:27,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2021-10-15 19:40:27,669 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:27,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:27,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:40:27,886 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:40:27,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:40:27 BoogieIcfgContainer [2021-10-15 19:40:27,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:40:27,890 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:40:27,890 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:40:27,890 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:40:27,890 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:10" (3/4) ... [2021-10-15 19:40:27,893 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:40:27,903 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-15 19:40:27,904 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-15 19:40:27,904 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:40:27,904 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:40:27,941 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:40:27,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:40:27,942 INFO L168 Benchmark]: Toolchain (without parser) took 18779.11 ms. Allocated memory was 96.5 MB in the beginning and 176.2 MB in the end (delta: 79.7 MB). Free memory was 63.5 MB in the beginning and 116.7 MB in the end (delta: -53.2 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:27,943 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 96.5 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 50.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:40:27,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.87 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 63.3 MB in the beginning and 90.0 MB in the end (delta: -26.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:27,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.47 ms. Allocated memory is still 121.6 MB. Free memory was 90.0 MB in the beginning and 87.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:27,944 INFO L168 Benchmark]: Boogie Preprocessor took 33.87 ms. Allocated memory is still 121.6 MB. Free memory was 87.9 MB in the beginning and 86.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:27,944 INFO L168 Benchmark]: RCFGBuilder took 461.87 ms. Allocated memory is still 121.6 MB. Free memory was 86.2 MB in the beginning and 72.2 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:27,945 INFO L168 Benchmark]: TraceAbstraction took 17625.26 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 71.8 MB in the beginning and 119.8 MB in the end (delta: -48.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:27,945 INFO L168 Benchmark]: Witness Printer took 51.69 ms. Allocated memory is still 176.2 MB. Free memory was 119.8 MB in the beginning and 116.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:27,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 96.5 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 50.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 549.87 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 63.3 MB in the beginning and 90.0 MB in the end (delta: -26.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.47 ms. Allocated memory is still 121.6 MB. Free memory was 90.0 MB in the beginning and 87.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.87 ms. Allocated memory is still 121.6 MB. Free memory was 87.9 MB in the beginning and 86.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 461.87 ms. Allocated memory is still 121.6 MB. Free memory was 86.2 MB in the beginning and 72.2 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17625.26 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 71.8 MB in the beginning and 119.8 MB in the end (delta: -48.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Witness Printer took 51.69 ms. Allocated memory is still 176.2 MB. Free memory was 119.8 MB in the beginning and 116.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 637]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17565.7ms, OverallIterations: 12, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 7555.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 103.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 37 SDtfs, 770 SDslu, 305 SDs, 0 SdLazy, 1646 SolverSat, 458 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1420.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 510 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 6953.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=669occurred in iteration=10, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 206.3ms SsaConstructionTime, 829.1ms SatisfiabilityAnalysisTime, 4940.7ms InterpolantComputationTime, 692 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 669 ConstructedInterpolants, 5 QuantifiedInterpolants, 3817 SizeOfPredicates, 82 NumberOfNonLiveVariables, 2146 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 23 InterpolantComputations, 7 PerfectInterpolantSequences, 196/258 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:40:27,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389d2822-62d3-4e0d-a0b0-da22c0e9f512/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...