./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_remove_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_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/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_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/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_954eb285-b6c0-4e30-bc3c-46fb96e17447/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 93a1ae2d9d86f9fff42650a9c6bf56405d253963 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:29:12,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:29:12,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:29:12,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:29:12,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:29:12,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:29:12,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:29:12,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:29:12,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:29:12,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:29:12,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:29:12,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:29:12,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:29:12,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:29:12,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:29:12,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:29:12,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:29:12,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:29:12,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:29:12,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:29:12,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:29:12,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:29:12,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:29:12,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:29:12,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:29:12,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:29:12,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:29:12,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:29:12,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:29:12,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:29:12,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:29:12,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:29:12,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:29:12,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:29:12,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:29:12,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:29:12,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:29:12,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:29:12,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:29:12,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:29:12,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:29:12,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:29:12,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:29:12,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:29:12,958 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:29:12,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:29:12,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:29:12,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:29:12,964 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:29:12,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:29:12,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:29:12,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:29:12,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:29:12,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:29:12,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:29:12,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:29:12,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:29:12,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:29:12,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:29:12,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:29:12,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:29:12,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:29:12,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:29:12,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:29:12,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:29:12,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:29:12,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:29:12,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:29:12,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:29:12,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:29:12,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:29:12,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:29:12,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:29:12,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:29:12,973 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_954eb285-b6c0-4e30-bc3c-46fb96e17447/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a1ae2d9d86f9fff42650a9c6bf56405d253963 [2021-10-15 19:29:13,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:29:13,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:29:13,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:29:13,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:29:13,285 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:29:13,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2021-10-15 19:29:13,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/data/7d10d85ca/b8aaa683c4734b7e8c8f9e0e7bbfefdf/FLAG80a5e96ff [2021-10-15 19:29:13,902 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:29:13,903 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2021-10-15 19:29:13,915 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/data/7d10d85ca/b8aaa683c4734b7e8c8f9e0e7bbfefdf/FLAG80a5e96ff [2021-10-15 19:29:14,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/data/7d10d85ca/b8aaa683c4734b7e8c8f9e0e7bbfefdf [2021-10-15 19:29:14,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:29:14,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:29:14,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:29:14,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:29:14,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:29:14,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd8e1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14, skipping insertion in model container [2021-10-15 19:29:14,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:29:14,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:29:14,727 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_954eb285-b6c0-4e30-bc3c-46fb96e17447/sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i[24177,24190] [2021-10-15 19:29:14,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:29:14,741 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:29:14,803 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_954eb285-b6c0-4e30-bc3c-46fb96e17447/sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i[24177,24190] [2021-10-15 19:29:14,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:29:14,848 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:29:14,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14 WrapperNode [2021-10-15 19:29:14,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:29:14,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:29:14,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:29:14,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:29:14,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:29:14,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:29:14,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:29:14,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:29:14,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:29:14,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:29:14,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:29:14,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:29:14,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (1/1) ... [2021-10-15 19:29:14,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:29:14,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:29:15,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:29:15,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:29:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:29:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:29:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:29:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:29:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:29:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:29:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 19:29:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:29:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:29:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:29:15,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:29:15,368 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-15 19:29:15,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:29:15 BoogieIcfgContainer [2021-10-15 19:29:15,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:29:15,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:29:15,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:29:15,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:29:15,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:29:14" (1/3) ... [2021-10-15 19:29:15,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1296b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:29:15, skipping insertion in model container [2021-10-15 19:29:15,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:29:14" (2/3) ... [2021-10-15 19:29:15,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1296b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:29:15, skipping insertion in model container [2021-10-15 19:29:15,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:29:15" (3/3) ... [2021-10-15 19:29:15,381 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all_reverse.i [2021-10-15 19:29:15,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:29:15,387 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:29:15,435 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:29:15,441 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 19:29:15,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:29:15,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 25 places, 33 transitions, 66 flow [2021-10-15 19:29:15,472 INFO L129 PetriNetUnfolder]: 9/33 cut-off events. [2021-10-15 19:29:15,472 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:29:15,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 33 events. 9/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:29:15,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 33 transitions, 66 flow [2021-10-15 19:29:15,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 25 transitions, 50 flow [2021-10-15 19:29:15,483 INFO L129 PetriNetUnfolder]: 6/24 cut-off events. [2021-10-15 19:29:15,484 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:29:15,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:15,485 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:29:15,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:15,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1692563660, now seen corresponding path program 1 times [2021-10-15 19:29:15,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:15,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540158560] [2021-10-15 19:29:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:15,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:15,762 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 19:29:15,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:15,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540158560] [2021-10-15 19:29:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540158560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:29:15,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:29:15,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:29:15,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445446852] [2021-10-15 19:29:15,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:29:15,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:29:15,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:29:15,794 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 33 [2021-10-15 19:29:15,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 25 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 19:29:15,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:15,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 33 [2021-10-15 19:29:15,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:15,821 INFO L129 PetriNetUnfolder]: 5/30 cut-off events. [2021-10-15 19:29:15,821 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:29:15,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 30 events. 5/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 10. Up to 5 conditions per place. [2021-10-15 19:29:15,824 INFO L132 encePairwiseOnDemand]: 28/33 looper letters, 4 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2021-10-15 19:29:15,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 62 flow [2021-10-15 19:29:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:29:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:29:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2021-10-15 19:29:15,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2021-10-15 19:29:15,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2021-10-15 19:29:15,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2021-10-15 19:29:15,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:15,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2021-10-15 19:29:15,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:15,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 19:29:15,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 19:29:15,849 INFO L186 Difference]: Start difference. First operand has 20 places, 25 transitions, 50 flow. Second operand 3 states and 88 transitions. [2021-10-15 19:29:15,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 62 flow [2021-10-15 19:29:15,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 62 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:29:15,854 INFO L242 Difference]: Finished difference. Result has 23 places, 24 transitions, 58 flow [2021-10-15 19:29:15,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=23, PETRI_TRANSITIONS=24} [2021-10-15 19:29:15,857 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-10-15 19:29:15,857 INFO L470 AbstractCegarLoop]: Abstraction has has 23 places, 24 transitions, 58 flow [2021-10-15 19:29:15,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 19:29:15,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:15,858 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:29:15,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:29:15,858 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:15,859 INFO L82 PathProgramCache]: Analyzing trace with hash -467696266, now seen corresponding path program 1 times [2021-10-15 19:29:15,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:15,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285108111] [2021-10-15 19:29:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:15,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:29:15,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:15,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285108111] [2021-10-15 19:29:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285108111] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:29:15,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:29:15,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:29:15,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644649717] [2021-10-15 19:29:15,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:29:15,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:29:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:29:15,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 33 [2021-10-15 19:29:15,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 24 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 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 19:29:15,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:15,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 33 [2021-10-15 19:29:15,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:16,080 INFO L129 PetriNetUnfolder]: 4/29 cut-off events. [2021-10-15 19:29:16,081 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:29:16,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 29 events. 4/29 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 28. Up to 8 conditions per place. [2021-10-15 19:29:16,082 INFO L132 encePairwiseOnDemand]: 26/33 looper letters, 10 selfloop transitions, 8 changer transitions 0/29 dead transitions. [2021-10-15 19:29:16,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 104 flow [2021-10-15 19:29:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:29:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:29:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2021-10-15 19:29:16,092 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5808080808080808 [2021-10-15 19:29:16,092 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 115 transitions. [2021-10-15 19:29:16,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 115 transitions. [2021-10-15 19:29:16,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:16,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 115 transitions. [2021-10-15 19:29:16,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 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 19:29:16,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 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 19:29:16,104 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 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 19:29:16,105 INFO L186 Difference]: Start difference. First operand has 23 places, 24 transitions, 58 flow. Second operand 6 states and 115 transitions. [2021-10-15 19:29:16,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 104 flow [2021-10-15 19:29:16,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:29:16,109 INFO L242 Difference]: Finished difference. Result has 28 places, 26 transitions, 82 flow [2021-10-15 19:29:16,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=82, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2021-10-15 19:29:16,110 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2021-10-15 19:29:16,110 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 82 flow [2021-10-15 19:29:16,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 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 19:29:16,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:16,111 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:29:16,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:29:16,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:16,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1147754636, now seen corresponding path program 1 times [2021-10-15 19:29:16,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:16,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478962084] [2021-10-15 19:29:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:16,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:16,269 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 19:29:16,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:16,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478962084] [2021-10-15 19:29:16,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478962084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:29:16,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:29:16,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:29:16,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669162602] [2021-10-15 19:29:16,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:29:16,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:29:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:29:16,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 33 [2021-10-15 19:29:16,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 19:29:16,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:16,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 33 [2021-10-15 19:29:16,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:16,291 INFO L129 PetriNetUnfolder]: 5/33 cut-off events. [2021-10-15 19:29:16,291 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:29:16,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 33 events. 5/33 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 17 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 31. Up to 5 conditions per place. [2021-10-15 19:29:16,292 INFO L132 encePairwiseOnDemand]: 29/33 looper letters, 4 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2021-10-15 19:29:16,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 100 flow [2021-10-15 19:29:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:29:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:29:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2021-10-15 19:29:16,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-10-15 19:29:16,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 108 transitions. [2021-10-15 19:29:16,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 108 transitions. [2021-10-15 19:29:16,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:16,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 108 transitions. [2021-10-15 19:29:16,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 19:29:16,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:16,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:16,297 INFO L186 Difference]: Start difference. First operand has 28 places, 26 transitions, 82 flow. Second operand 4 states and 108 transitions. [2021-10-15 19:29:16,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 100 flow [2021-10-15 19:29:16,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:29:16,299 INFO L242 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2021-10-15 19:29:16,300 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2021-10-15 19:29:16,300 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2021-10-15 19:29:16,300 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2021-10-15 19:29:16,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 19:29:16,300 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:16,300 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] [2021-10-15 19:29:16,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:29:16,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1043859079, now seen corresponding path program 1 times [2021-10-15 19:29:16,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:16,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817034791] [2021-10-15 19:29:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:16,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:29:16,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:16,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817034791] [2021-10-15 19:29:16,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817034791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:29:16,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982038909] [2021-10-15 19:29:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:16,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:29:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:29:16,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:29:16,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:29:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:16,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:29:16,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:29:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:29:16,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982038909] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:29:16,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:29:16,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-15 19:29:16,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863911180] [2021-10-15 19:29:16,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:29:16,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:29:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:29:16,781 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 33 [2021-10-15 19:29:16,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 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 19:29:16,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:16,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 33 [2021-10-15 19:29:16,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:16,806 INFO L129 PetriNetUnfolder]: 5/34 cut-off events. [2021-10-15 19:29:16,807 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 19:29:16,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 34 events. 5/34 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 38. Up to 4 conditions per place. [2021-10-15 19:29:16,808 INFO L132 encePairwiseOnDemand]: 28/33 looper letters, 3 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2021-10-15 19:29:16,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 113 flow [2021-10-15 19:29:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:29:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:29:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2021-10-15 19:29:16,810 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8121212121212121 [2021-10-15 19:29:16,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 134 transitions. [2021-10-15 19:29:16,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 134 transitions. [2021-10-15 19:29:16,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:16,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 134 transitions. [2021-10-15 19:29:16,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:16,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 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 19:29:16,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 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 19:29:16,813 INFO L186 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 5 states and 134 transitions. [2021-10-15 19:29:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 113 flow [2021-10-15 19:29:16,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 109 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:29:16,815 INFO L242 Difference]: Finished difference. Result has 34 places, 28 transitions, 112 flow [2021-10-15 19:29:16,815 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2021-10-15 19:29:16,816 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2021-10-15 19:29:16,816 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 112 flow [2021-10-15 19:29:16,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 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 19:29:16,816 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:16,816 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:29:16,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:29:17,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:29:17,045 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash -684791148, now seen corresponding path program 2 times [2021-10-15 19:29:17,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:17,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387926927] [2021-10-15 19:29:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:17,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:29:18,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:18,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387926927] [2021-10-15 19:29:18,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387926927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:29:18,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247458235] [2021-10-15 19:29:18,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:29:18,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:29:18,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:29:18,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:29:18,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:29:18,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:29:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:29:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-15 19:29:18,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:29:18,630 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 19:29:18,631 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-15 19:29:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:29:18,868 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-10-15 19:29:18,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 14 [2021-10-15 19:29:19,109 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 19:29:19,122 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 19:29:19,329 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:29:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 96 [2021-10-15 19:29:19,351 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:29:19,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 58 [2021-10-15 19:29:20,085 INFO L354 Elim1Store]: treesize reduction 906, result has 7.1 percent of original size [2021-10-15 19:29:20,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 14 new quantified variables, introduced 29 case distinctions, treesize of input 968 treesize of output 352 [2021-10-15 19:29:20,335 INFO L354 Elim1Store]: treesize reduction 706, result has 8.2 percent of original size [2021-10-15 19:29:20,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 13 new quantified variables, introduced 29 case distinctions, treesize of input 911 treesize of output 412 [2021-10-15 19:29:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:29:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:29:20,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:29:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:29:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:29:20,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:29:20,439 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:29:20,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 52 [2021-10-15 19:29:20,641 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-10-15 19:29:20,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 143 [2021-10-15 19:29:21,239 INFO L354 Elim1Store]: treesize reduction 256, result has 0.4 percent of original size [2021-10-15 19:29:21,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 370 treesize of output 1 [2021-10-15 19:29:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:29:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247458235] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:29:21,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:29:21,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-15 19:29:21,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913355721] [2021-10-15 19:29:21,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 19:29:21,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 19:29:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-10-15 19:29:21,254 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2021-10-15 19:29:21,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 112 flow. Second operand has 28 states, 28 states have (on average 10.214285714285714) internal successors, (286), 28 states have internal predecessors, (286), 0 states have call successors, (0), 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 19:29:21,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:21,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2021-10-15 19:29:21,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:22,850 INFO L129 PetriNetUnfolder]: 6/45 cut-off events. [2021-10-15 19:29:22,850 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-10-15 19:29:22,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 45 events. 6/45 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 88. Up to 10 conditions per place. [2021-10-15 19:29:22,851 INFO L132 encePairwiseOnDemand]: 20/33 looper letters, 17 selfloop transitions, 20 changer transitions 0/43 dead transitions. [2021-10-15 19:29:22,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 231 flow [2021-10-15 19:29:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:29:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:29:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 191 transitions. [2021-10-15 19:29:22,854 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3404634581105169 [2021-10-15 19:29:22,854 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 191 transitions. [2021-10-15 19:29:22,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 191 transitions. [2021-10-15 19:29:22,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:22,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 191 transitions. [2021-10-15 19:29:22,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.235294117647058) internal successors, (191), 17 states have internal predecessors, (191), 0 states have call successors, (0), 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 19:29:22,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 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 19:29:22,858 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 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 19:29:22,858 INFO L186 Difference]: Start difference. First operand has 34 places, 28 transitions, 112 flow. Second operand 17 states and 191 transitions. [2021-10-15 19:29:22,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 231 flow [2021-10-15 19:29:22,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 225 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:29:22,862 INFO L242 Difference]: Finished difference. Result has 54 places, 40 transitions, 212 flow [2021-10-15 19:29:22,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=212, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2021-10-15 19:29:22,863 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2021-10-15 19:29:22,863 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 212 flow [2021-10-15 19:29:22,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.214285714285714) internal successors, (286), 28 states have internal predecessors, (286), 0 states have call successors, (0), 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 19:29:22,863 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:22,863 INFO L254 CegarLoopForPetriNet]: trace histogram [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 19:29:22,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:29:23,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:29:23,077 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash -742049450, now seen corresponding path program 1 times [2021-10-15 19:29:23,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:23,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761151012] [2021-10-15 19:29:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:23,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:29:23,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:23,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761151012] [2021-10-15 19:29:23,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761151012] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:29:23,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:29:23,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:29:23,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623515151] [2021-10-15 19:29:23,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:29:23,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:29:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:29:23,147 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 33 [2021-10-15 19:29:23,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:23,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:23,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 33 [2021-10-15 19:29:23,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:23,231 INFO L129 PetriNetUnfolder]: 7/53 cut-off events. [2021-10-15 19:29:23,231 INFO L130 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2021-10-15 19:29:23,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 53 events. 7/53 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 136. Up to 14 conditions per place. [2021-10-15 19:29:23,232 INFO L132 encePairwiseOnDemand]: 28/33 looper letters, 24 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2021-10-15 19:29:23,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 306 flow [2021-10-15 19:29:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:29:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:29:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2021-10-15 19:29:23,234 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6242424242424243 [2021-10-15 19:29:23,234 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2021-10-15 19:29:23,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2021-10-15 19:29:23,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:23,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2021-10-15 19:29:23,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 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 19:29:23,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 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 19:29:23,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 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 19:29:23,236 INFO L186 Difference]: Start difference. First operand has 54 places, 40 transitions, 212 flow. Second operand 5 states and 103 transitions. [2021-10-15 19:29:23,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 306 flow [2021-10-15 19:29:23,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 282 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-10-15 19:29:23,241 INFO L242 Difference]: Finished difference. Result has 57 places, 43 transitions, 238 flow [2021-10-15 19:29:23,241 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2021-10-15 19:29:23,242 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2021-10-15 19:29:23,242 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 238 flow [2021-10-15 19:29:23,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:23,242 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:23,242 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:29:23,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:29:23,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1369084261, now seen corresponding path program 2 times [2021-10-15 19:29:23,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:23,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697782080] [2021-10-15 19:29:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:23,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:29:23,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:23,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697782080] [2021-10-15 19:29:23,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697782080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:29:23,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739241894] [2021-10-15 19:29:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:29:23,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:29:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:29:23,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:29:23,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:29:23,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:29:23,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:29:23,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:29:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:29:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:29:23,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739241894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:29:23,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:29:23,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-10-15 19:29:23,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705757007] [2021-10-15 19:29:23,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:29:23,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:29:23,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:29:23,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 33 [2021-10-15 19:29:23,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 0 states have call successors, (0), 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 19:29:23,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:23,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 33 [2021-10-15 19:29:23,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:23,695 INFO L129 PetriNetUnfolder]: 5/50 cut-off events. [2021-10-15 19:29:23,695 INFO L130 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2021-10-15 19:29:23,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 50 events. 5/50 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 2/52 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2021-10-15 19:29:23,698 INFO L132 encePairwiseOnDemand]: 29/33 looper letters, 3 selfloop transitions, 4 changer transitions 8/42 dead transitions. [2021-10-15 19:29:23,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 42 transitions, 252 flow [2021-10-15 19:29:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:29:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:29:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2021-10-15 19:29:23,700 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2021-10-15 19:29:23,700 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 158 transitions. [2021-10-15 19:29:23,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 158 transitions. [2021-10-15 19:29:23,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:23,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 158 transitions. [2021-10-15 19:29:23,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 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 19:29:23,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 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 19:29:23,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 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 19:29:23,704 INFO L186 Difference]: Start difference. First operand has 57 places, 43 transitions, 238 flow. Second operand 6 states and 158 transitions. [2021-10-15 19:29:23,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 42 transitions, 252 flow [2021-10-15 19:29:23,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 42 transitions, 242 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-10-15 19:29:23,714 INFO L242 Difference]: Finished difference. Result has 59 places, 34 transitions, 174 flow [2021-10-15 19:29:23,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=59, PETRI_TRANSITIONS=34} [2021-10-15 19:29:23,714 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2021-10-15 19:29:23,715 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 34 transitions, 174 flow [2021-10-15 19:29:23,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 0 states have call successors, (0), 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 19:29:23,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:23,716 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] [2021-10-15 19:29:23,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:29:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:29:23,941 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1380378058, now seen corresponding path program 1 times [2021-10-15 19:29:23,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:23,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648554185] [2021-10-15 19:29:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:23,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:23,993 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 19:29:23,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:23,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648554185] [2021-10-15 19:29:23,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648554185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:29:23,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924535324] [2021-10-15 19:29:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:23,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:29:23,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:29:23,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:29:24,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:29:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:29:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:29:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:29:24,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924535324] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:29:24,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:29:24,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-10-15 19:29:24,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559799326] [2021-10-15 19:29:24,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:29:24,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:29:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:29:24,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 33 [2021-10-15 19:29:24,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 34 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:29:24,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:24,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 33 [2021-10-15 19:29:24,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:24,281 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-10-15 19:29:24,281 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-10-15 19:29:24,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 12 events. 0/12 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:29:24,282 INFO L132 encePairwiseOnDemand]: 30/33 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-10-15 19:29:24,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 12 transitions, 63 flow [2021-10-15 19:29:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:29:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:29:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2021-10-15 19:29:24,283 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8257575757575758 [2021-10-15 19:29:24,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 109 transitions. [2021-10-15 19:29:24,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 109 transitions. [2021-10-15 19:29:24,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:24,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 109 transitions. [2021-10-15 19:29:24,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:24,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:24,285 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:29:24,286 INFO L186 Difference]: Start difference. First operand has 59 places, 34 transitions, 174 flow. Second operand 4 states and 109 transitions. [2021-10-15 19:29:24,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 12 transitions, 63 flow [2021-10-15 19:29:24,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 12 transitions, 40 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-10-15 19:29:24,287 INFO L242 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-10-15 19:29:24,287 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-10-15 19:29:24,287 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2021-10-15 19:29:24,287 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-10-15 19:29:24,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:29:24,290 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:29:24,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-15 19:29:24,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:29:24,521 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:29:24,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:29:24 BoogieIcfgContainer [2021-10-15 19:29:24,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:29:24,526 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:29:24,526 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:29:24,526 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:29:24,527 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:29:15" (3/4) ... [2021-10-15 19:29:24,530 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:29:24,541 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-15 19:29:24,542 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-15 19:29:24,542 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:29:24,542 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:29:24,588 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:29:24,588 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:29:24,589 INFO L168 Benchmark]: Toolchain (without parser) took 10405.44 ms. Allocated memory was 88.1 MB in the beginning and 176.2 MB in the end (delta: 88.1 MB). Free memory was 50.4 MB in the beginning and 95.8 MB in the end (delta: -45.4 MB). Peak memory consumption was 42.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:29:24,589 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:29:24,589 INFO L168 Benchmark]: CACSL2BoogieTranslator took 653.75 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 50.3 MB in the beginning and 88.9 MB in the end (delta: -38.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:29:24,590 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.56 ms. Allocated memory is still 121.6 MB. Free memory was 88.9 MB in the beginning and 86.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:29:24,590 INFO L168 Benchmark]: Boogie Preprocessor took 36.95 ms. Allocated memory is still 121.6 MB. Free memory was 86.8 MB in the beginning and 85.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:29:24,591 INFO L168 Benchmark]: RCFGBuilder took 400.76 ms. Allocated memory is still 121.6 MB. Free memory was 85.1 MB in the beginning and 71.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:29:24,591 INFO L168 Benchmark]: TraceAbstraction took 9152.78 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 70.4 MB in the beginning and 99.0 MB in the end (delta: -28.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:29:24,592 INFO L168 Benchmark]: Witness Printer took 61.94 ms. Allocated memory is still 176.2 MB. Free memory was 99.0 MB in the beginning and 95.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:29:24,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 653.75 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 50.3 MB in the beginning and 88.9 MB in the end (delta: -38.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.56 ms. Allocated memory is still 121.6 MB. Free memory was 88.9 MB in the beginning and 86.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.95 ms. Allocated memory is still 121.6 MB. Free memory was 86.8 MB in the beginning and 85.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 400.76 ms. Allocated memory is still 121.6 MB. Free memory was 85.1 MB in the beginning and 71.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9152.78 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 70.4 MB in the beginning and 99.0 MB in the end (delta: -28.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. * Witness Printer took 61.94 ms. Allocated memory is still 176.2 MB. Free memory was 99.0 MB in the beginning and 95.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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: 625]: 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, 25 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9090.1ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 2052.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 151 SDslu, 33 SDs, 0 SdLazy, 410 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 506.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2254.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred in iteration=6, InterpolantAutomatonStates: 50, 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: 143.3ms SsaConstructionTime, 754.7ms SatisfiabilityAnalysisTime, 4580.9ms InterpolantComputationTime, 276 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 3 QuantifiedInterpolants, 2388 SizeOfPredicates, 41 NumberOfNonLiveVariables, 810 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 63/76 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 19:29:24,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_954eb285-b6c0-4e30-bc3c-46fb96e17447/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...