./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.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_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/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_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/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_b23597c5-2227-4413-a30c-6b1dd575f4e1/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 eb4dbd37bc5df2d32e4d07ff5e8c8ac6d224b822 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:05:00,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:05:00,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:05:00,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:05:00,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:05:00,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:05:00,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:05:00,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:05:00,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:05:00,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:05:00,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:05:00,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:05:00,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:05:00,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:05:00,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:05:00,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:05:00,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:05:00,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:05:00,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:05:00,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:05:00,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:05:00,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:05:00,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:05:00,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:05:00,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:05:00,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:05:00,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:05:00,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:05:00,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:05:00,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:05:00,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:05:00,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:05:00,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:05:00,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:05:00,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:05:00,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:05:00,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:05:00,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:05:00,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:05:00,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:05:00,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:05:00,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:05:00,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:05:00,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:05:00,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:05:00,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:05:00,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:05:00,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:05:00,943 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:05:00,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:05:00,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:05:00,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:05:00,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:05:00,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:05:00,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:05:00,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:05:00,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:05:00,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:05:00,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:05:00,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:05:00,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:05:00,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:05:00,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:05:00,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:05:00,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:05:00,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:05:00,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:05:00,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:05:00,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:05:00,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:05:00,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:05:00,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:05:00,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:05:00,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:05:00,950 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_b23597c5-2227-4413-a30c-6b1dd575f4e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb4dbd37bc5df2d32e4d07ff5e8c8ac6d224b822 [2021-10-15 20:05:01,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:05:01,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:05:01,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:05:01,214 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:05:01,215 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:05:01,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-10-15 20:05:01,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/data/d6b97087b/1f1763b8ca74404db3caaf36359cdad1/FLAG1e6b5242d [2021-10-15 20:05:01,773 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:05:01,773 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-10-15 20:05:01,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/data/d6b97087b/1f1763b8ca74404db3caaf36359cdad1/FLAG1e6b5242d [2021-10-15 20:05:02,097 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/data/d6b97087b/1f1763b8ca74404db3caaf36359cdad1 [2021-10-15 20:05:02,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:05:02,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:05:02,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:05:02,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:05:02,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:05:02,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba66efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02, skipping insertion in model container [2021-10-15 20:05:02,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:05:02,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:05:02,462 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_b23597c5-2227-4413-a30c-6b1dd575f4e1/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-10-15 20:05:02,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:05:02,480 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:05:02,566 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_b23597c5-2227-4413-a30c-6b1dd575f4e1/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-10-15 20:05:02,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:05:02,597 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:05:02,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02 WrapperNode [2021-10-15 20:05:02,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:05:02,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:05:02,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:05:02,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:05:02,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:05:02,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:05:02,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:05:02,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:05:02,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:05:02,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:05:02,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:05:02,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:05:02,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (1/1) ... [2021-10-15 20:05:02,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:05:02,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:02,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:05:02,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:05:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:05:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:05:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:05:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:05:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:05:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:05:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:05:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 20:05:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:05:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:05:02,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:05:03,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:05:03,192 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-15 20:05:03,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:05:03 BoogieIcfgContainer [2021-10-15 20:05:03,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:05:03,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:05:03,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:05:03,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:05:03,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:05:02" (1/3) ... [2021-10-15 20:05:03,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a12c91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:05:03, skipping insertion in model container [2021-10-15 20:05:03,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:05:02" (2/3) ... [2021-10-15 20:05:03,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a12c91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:05:03, skipping insertion in model container [2021-10-15 20:05:03,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:05:03" (3/3) ... [2021-10-15 20:05:03,203 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2021-10-15 20:05:03,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:05:03,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:05:03,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:05:03,263 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 20:05:03,263 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:05:03,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 25 places, 34 transitions, 68 flow [2021-10-15 20:05:03,296 INFO L129 PetriNetUnfolder]: 10/34 cut-off events. [2021-10-15 20:05:03,296 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:05:03,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 34 events. 10/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 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 20:05:03,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 34 transitions, 68 flow [2021-10-15 20:05:03,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 22 transitions, 44 flow [2021-10-15 20:05:03,308 INFO L129 PetriNetUnfolder]: 5/21 cut-off events. [2021-10-15 20:05:03,308 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:05:03,309 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:03,309 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:03,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:03,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1326453147, now seen corresponding path program 1 times [2021-10-15 20:05:03,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:03,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181924248] [2021-10-15 20:05:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:03,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:03,480 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 20:05:03,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:03,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181924248] [2021-10-15 20:05:03,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181924248] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:05:03,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:05:03,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:05:03,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094544996] [2021-10-15 20:05:03,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:05:03,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:05:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:05:03,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 34 [2021-10-15 20:05:03,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 22 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 20:05:03,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:03,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 34 [2021-10-15 20:05:03,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:03,522 INFO L129 PetriNetUnfolder]: 3/20 cut-off events. [2021-10-15 20:05:03,522 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:05:03,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 20 events. 3/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 2/19 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2021-10-15 20:05:03,525 INFO L132 encePairwiseOnDemand]: 32/34 looper letters, 0 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2021-10-15 20:05:03,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 20 transitions, 40 flow [2021-10-15 20:05:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:05:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:05:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 62 transitions. [2021-10-15 20:05:03,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9117647058823529 [2021-10-15 20:05:03,537 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 62 transitions. [2021-10-15 20:05:03,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 62 transitions. [2021-10-15 20:05:03,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:03,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 62 transitions. [2021-10-15 20:05:03,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 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 20:05:03,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 20:05:03,547 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 20:05:03,549 INFO L186 Difference]: Start difference. First operand has 18 places, 22 transitions, 44 flow. Second operand 2 states and 62 transitions. [2021-10-15 20:05:03,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 20 transitions, 40 flow [2021-10-15 20:05:03,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 40 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:05:03,570 INFO L242 Difference]: Finished difference. Result has 19 places, 20 transitions, 40 flow [2021-10-15 20:05:03,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=19, PETRI_TRANSITIONS=20} [2021-10-15 20:05:03,574 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2021-10-15 20:05:03,574 INFO L470 AbstractCegarLoop]: Abstraction has has 19 places, 20 transitions, 40 flow [2021-10-15 20:05:03,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 20:05:03,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:03,576 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:03,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:05:03,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1817762933, now seen corresponding path program 1 times [2021-10-15 20:05:03,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:03,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045894108] [2021-10-15 20:05:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:03,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:03,735 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 20:05:03,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:03,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045894108] [2021-10-15 20:05:03,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045894108] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:05:03,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:05:03,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:05:03,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562218361] [2021-10-15 20:05:03,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:05:03,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:03,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:05:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:05:03,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 34 [2021-10-15 20:05:03,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 20 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:03,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:03,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 34 [2021-10-15 20:05:03,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:03,774 INFO L129 PetriNetUnfolder]: 3/25 cut-off events. [2021-10-15 20:05:03,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:05:03,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 31. Up to 5 conditions per place. [2021-10-15 20:05:03,778 INFO L132 encePairwiseOnDemand]: 31/34 looper letters, 4 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2021-10-15 20:05:03,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 56 flow [2021-10-15 20:05:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:05:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:05:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2021-10-15 20:05:03,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-10-15 20:05:03,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 85 transitions. [2021-10-15 20:05:03,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 85 transitions. [2021-10-15 20:05:03,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:03,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 85 transitions. [2021-10-15 20:05:03,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 20:05:03,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 20:05:03,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 20:05:03,794 INFO L186 Difference]: Start difference. First operand has 19 places, 20 transitions, 40 flow. Second operand 3 states and 85 transitions. [2021-10-15 20:05:03,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 56 flow [2021-10-15 20:05:03,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:05:03,797 INFO L242 Difference]: Finished difference. Result has 22 places, 21 transitions, 52 flow [2021-10-15 20:05:03,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2021-10-15 20:05:03,799 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 4 predicate places. [2021-10-15 20:05:03,799 INFO L470 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 52 flow [2021-10-15 20:05:03,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:03,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:03,800 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:03,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:05:03,801 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1494250531, now seen corresponding path program 1 times [2021-10-15 20:05:03,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:03,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257077366] [2021-10-15 20:05:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:03,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:03,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:03,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257077366] [2021-10-15 20:05:03,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257077366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:03,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942194429] [2021-10-15 20:05:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:03,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:03,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:03,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:03,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:05:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:05:04,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:04,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942194429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:04,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:05:04,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:05:04,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126757688] [2021-10-15 20:05:04,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:05:04,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:05:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:05:04,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 34 [2021-10-15 20:05:04,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:04,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:04,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 34 [2021-10-15 20:05:04,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:04,191 INFO L129 PetriNetUnfolder]: 3/26 cut-off events. [2021-10-15 20:05:04,191 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:05:04,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 26 events. 3/26 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 38. Up to 4 conditions per place. [2021-10-15 20:05:04,192 INFO L132 encePairwiseOnDemand]: 30/34 looper letters, 3 selfloop transitions, 4 changer transitions 0/23 dead transitions. [2021-10-15 20:05:04,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 70 flow [2021-10-15 20:05:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:05:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:05:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2021-10-15 20:05:04,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8235294117647058 [2021-10-15 20:05:04,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 112 transitions. [2021-10-15 20:05:04,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 112 transitions. [2021-10-15 20:05:04,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:04,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 112 transitions. [2021-10-15 20:05:04,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 20:05:04,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 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 20:05:04,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 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 20:05:04,208 INFO L186 Difference]: Start difference. First operand has 22 places, 21 transitions, 52 flow. Second operand 4 states and 112 transitions. [2021-10-15 20:05:04,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 70 flow [2021-10-15 20:05:04,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 68 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:05:04,217 INFO L242 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2021-10-15 20:05:04,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2021-10-15 20:05:04,217 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 8 predicate places. [2021-10-15 20:05:04,217 INFO L470 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2021-10-15 20:05:04,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:04,218 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:04,218 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:04,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:05:04,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:04,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash -341426827, now seen corresponding path program 2 times [2021-10-15 20:05:04,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:04,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312665925] [2021-10-15 20:05:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:04,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:05:04,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:04,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312665925] [2021-10-15 20:05:04,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312665925] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:05:04,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:05:04,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:05:04,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778886346] [2021-10-15 20:05:04,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:05:04,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:05:04,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:05:04,633 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2021-10-15 20:05:04,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:04,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:04,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2021-10-15 20:05:04,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:04,742 INFO L129 PetriNetUnfolder]: 3/30 cut-off events. [2021-10-15 20:05:04,742 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-10-15 20:05:04,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 30 events. 3/30 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 64. Up to 11 conditions per place. [2021-10-15 20:05:04,744 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 11 selfloop transitions, 5 changer transitions 0/24 dead transitions. [2021-10-15 20:05:04,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 106 flow [2021-10-15 20:05:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:05:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:05:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2021-10-15 20:05:04,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2021-10-15 20:05:04,747 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 88 transitions. [2021-10-15 20:05:04,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 88 transitions. [2021-10-15 20:05:04,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:04,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 88 transitions. [2021-10-15 20:05:04,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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 20:05:04,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 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 20:05:04,750 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 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 20:05:04,750 INFO L186 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 88 transitions. [2021-10-15 20:05:04,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 106 flow [2021-10-15 20:05:04,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 102 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 20:05:04,758 INFO L242 Difference]: Finished difference. Result has 31 places, 23 transitions, 84 flow [2021-10-15 20:05:04,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=84, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2021-10-15 20:05:04,759 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 13 predicate places. [2021-10-15 20:05:04,759 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 84 flow [2021-10-15 20:05:04,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:04,760 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:04,760 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:04,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:05:04,761 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash -341425153, now seen corresponding path program 1 times [2021-10-15 20:05:04,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:04,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968979301] [2021-10-15 20:05:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:04,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:05:05,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:05,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968979301] [2021-10-15 20:05:05,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968979301] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:05:05,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:05:05,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:05:05,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833482314] [2021-10-15 20:05:05,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:05:05,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:05:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:05:05,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:05:05,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:05,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:05,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:05:05,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:05,263 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2021-10-15 20:05:05,263 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:05:05,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 28 events. 3/28 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 70. Up to 10 conditions per place. [2021-10-15 20:05:05,265 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 11 selfloop transitions, 7 changer transitions 0/24 dead transitions. [2021-10-15 20:05:05,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 122 flow [2021-10-15 20:05:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:05:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:05:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2021-10-15 20:05:05,269 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3602941176470588 [2021-10-15 20:05:05,270 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 98 transitions. [2021-10-15 20:05:05,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 98 transitions. [2021-10-15 20:05:05,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:05,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 98 transitions. [2021-10-15 20:05:05,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.25) internal successors, (98), 8 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 20:05:05,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 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 20:05:05,274 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 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 20:05:05,275 INFO L186 Difference]: Start difference. First operand has 31 places, 23 transitions, 84 flow. Second operand 8 states and 98 transitions. [2021-10-15 20:05:05,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 122 flow [2021-10-15 20:05:05,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 24 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 20:05:05,278 INFO L242 Difference]: Finished difference. Result has 36 places, 24 transitions, 100 flow [2021-10-15 20:05:05,278 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=24} [2021-10-15 20:05:05,278 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 18 predicate places. [2021-10-15 20:05:05,279 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 24 transitions, 100 flow [2021-10-15 20:05:05,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:05,279 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:05,279 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:05,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:05:05,280 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1692024848, now seen corresponding path program 1 times [2021-10-15 20:05:05,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:05,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141502245] [2021-10-15 20:05:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:05,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:05:05,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:05,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141502245] [2021-10-15 20:05:05,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141502245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:05,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605649329] [2021-10-15 20:05:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:05,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:05,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:05,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:05,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:05:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-15 20:05:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:06,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:06,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-10-15 20:05:06,229 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-10-15 20:05:06,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 79 [2021-10-15 20:05:06,252 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-10-15 20:05:06,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 59 [2021-10-15 20:05:06,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2021-10-15 20:05:06,480 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-10-15 20:05:06,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 31 [2021-10-15 20:05:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:05:06,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605649329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:06,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:05:06,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-15 20:05:06,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761709450] [2021-10-15 20:05:06,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 20:05:06,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 20:05:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-10-15 20:05:06,525 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:05:06,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 24 transitions, 100 flow. Second operand has 22 states, 22 states have (on average 11.590909090909092) internal successors, (255), 22 states have internal predecessors, (255), 0 states have call successors, (0), 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 20:05:06,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:06,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:05:06,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:07,427 INFO L129 PetriNetUnfolder]: 3/32 cut-off events. [2021-10-15 20:05:07,427 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 20:05:07,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 32 events. 3/32 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 86. Up to 5 conditions per place. [2021-10-15 20:05:07,436 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 8 selfloop transitions, 16 changer transitions 0/30 dead transitions. [2021-10-15 20:05:07,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 30 transitions, 166 flow [2021-10-15 20:05:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:05:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:05:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 174 transitions. [2021-10-15 20:05:07,452 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3411764705882353 [2021-10-15 20:05:07,452 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 174 transitions. [2021-10-15 20:05:07,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 174 transitions. [2021-10-15 20:05:07,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:07,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 174 transitions. [2021-10-15 20:05:07,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.6) internal successors, (174), 15 states have internal predecessors, (174), 0 states have call successors, (0), 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 20:05:07,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 34.0) internal successors, (544), 16 states have internal predecessors, (544), 0 states have call successors, (0), 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 20:05:07,458 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 34.0) internal successors, (544), 16 states have internal predecessors, (544), 0 states have call successors, (0), 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 20:05:07,458 INFO L186 Difference]: Start difference. First operand has 36 places, 24 transitions, 100 flow. Second operand 15 states and 174 transitions. [2021-10-15 20:05:07,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 30 transitions, 166 flow [2021-10-15 20:05:07,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 30 transitions, 154 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 20:05:07,463 INFO L242 Difference]: Finished difference. Result has 47 places, 29 transitions, 150 flow [2021-10-15 20:05:07,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=150, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2021-10-15 20:05:07,464 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 29 predicate places. [2021-10-15 20:05:07,467 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 150 flow [2021-10-15 20:05:07,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.590909090909092) internal successors, (255), 22 states have internal predecessors, (255), 0 states have call successors, (0), 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 20:05:07,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:07,471 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:07,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:05:07,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:07,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1692023174, now seen corresponding path program 1 times [2021-10-15 20:05:07,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:07,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789297294] [2021-10-15 20:05:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:07,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:05:08,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789297294] [2021-10-15 20:05:08,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789297294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:08,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630003410] [2021-10-15 20:05:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:08,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:08,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:08,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:05:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:08,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-15 20:05:08,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:08,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:05:08,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:05:08,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:08,636 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 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-15 20:05:08,849 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 20:05:08,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 20:05:09,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:09,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:09,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-10-15 20:05:09,027 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 0 case distinctions, treesize of input 62 treesize of output 50 [2021-10-15 20:05:09,042 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-15 20:05:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-10-15 20:05:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:09,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-10-15 20:05:09,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:05:09,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 126 [2021-10-15 20:05:09,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:05:09,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 83 [2021-10-15 20:05:09,248 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 0 case distinctions, treesize of input 114 treesize of output 90 [2021-10-15 20:05:09,259 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-10-15 20:05:09,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 75 [2021-10-15 20:05:09,463 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-15 20:05:09,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 58 [2021-10-15 20:05:09,476 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-10-15 20:05:09,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2021-10-15 20:05:09,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 20:05:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:05:09,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630003410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:09,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:05:09,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-10-15 20:05:09,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807730455] [2021-10-15 20:05:09,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-15 20:05:09,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-15 20:05:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-10-15 20:05:09,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2021-10-15 20:05:09,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 29 transitions, 150 flow. Second operand has 26 states, 26 states have (on average 10.5) internal successors, (273), 26 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:09,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:09,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2021-10-15 20:05:09,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:11,080 INFO L129 PetriNetUnfolder]: 2/31 cut-off events. [2021-10-15 20:05:11,080 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-10-15 20:05:11,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 31 events. 2/31 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 102. Up to 5 conditions per place. [2021-10-15 20:05:11,081 INFO L132 encePairwiseOnDemand]: 21/34 looper letters, 8 selfloop transitions, 17 changer transitions 0/30 dead transitions. [2021-10-15 20:05:11,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 30 transitions, 202 flow [2021-10-15 20:05:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 20:05:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 20:05:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2021-10-15 20:05:11,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31066176470588236 [2021-10-15 20:05:11,084 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 169 transitions. [2021-10-15 20:05:11,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 169 transitions. [2021-10-15 20:05:11,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:11,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 169 transitions. [2021-10-15 20:05:11,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 0 states have call successors, (0), 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 20:05:11,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 34.0) internal successors, (578), 17 states have internal predecessors, (578), 0 states have call successors, (0), 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 20:05:11,088 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 34.0) internal successors, (578), 17 states have internal predecessors, (578), 0 states have call successors, (0), 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 20:05:11,088 INFO L186 Difference]: Start difference. First operand has 47 places, 29 transitions, 150 flow. Second operand 16 states and 169 transitions. [2021-10-15 20:05:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 30 transitions, 202 flow [2021-10-15 20:05:11,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 30 transitions, 182 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-10-15 20:05:11,092 INFO L242 Difference]: Finished difference. Result has 56 places, 29 transitions, 168 flow [2021-10-15 20:05:11,092 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=168, PETRI_PLACES=56, PETRI_TRANSITIONS=29} [2021-10-15 20:05:11,093 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 38 predicate places. [2021-10-15 20:05:11,093 INFO L470 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 168 flow [2021-10-15 20:05:11,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.5) internal successors, (273), 26 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:11,093 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:11,094 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:11,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:05:11,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 20:05:11,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:11,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1758367659, now seen corresponding path program 2 times [2021-10-15 20:05:11,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:11,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359865163] [2021-10-15 20:05:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:11,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:11,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:11,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359865163] [2021-10-15 20:05:11,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359865163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:11,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191593528] [2021-10-15 20:05:11,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:05:11,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:11,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:11,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:05:11,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:05:11,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:05:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-15 20:05:11,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:12,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:05:12,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-15 20:05:12,471 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 20:05:12,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 20:05:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:12,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:12,613 INFO L354 Elim1Store]: treesize reduction 119, result has 9.8 percent of original size [2021-10-15 20:05:12,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 69 [2021-10-15 20:05:12,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:12,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:12,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-10-15 20:05:12,753 INFO L354 Elim1Store]: treesize reduction 128, result has 12.3 percent of original size [2021-10-15 20:05:12,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 101 [2021-10-15 20:05:12,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:05:12,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 81 [2021-10-15 20:05:12,936 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-15 20:05:12,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 87 [2021-10-15 20:05:13,093 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 20:05:13,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 28 [2021-10-15 20:05:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:13,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191593528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:13,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:05:13,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-10-15 20:05:13,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620307219] [2021-10-15 20:05:13,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-15 20:05:13,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-15 20:05:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-10-15 20:05:13,125 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:05:13,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 168 flow. Second operand has 32 states, 32 states have (on average 11.21875) internal successors, (359), 32 states have internal predecessors, (359), 0 states have call successors, (0), 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 20:05:13,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:13,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:05:13,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:14,322 INFO L129 PetriNetUnfolder]: 2/37 cut-off events. [2021-10-15 20:05:14,323 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-15 20:05:14,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 37 events. 2/37 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 128. Up to 5 conditions per place. [2021-10-15 20:05:14,323 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 8 selfloop transitions, 20 changer transitions 0/34 dead transitions. [2021-10-15 20:05:14,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 34 transitions, 246 flow [2021-10-15 20:05:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:05:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:05:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 229 transitions. [2021-10-15 20:05:14,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33676470588235297 [2021-10-15 20:05:14,328 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 229 transitions. [2021-10-15 20:05:14,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 229 transitions. [2021-10-15 20:05:14,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:14,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 229 transitions. [2021-10-15 20:05:14,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.45) internal successors, (229), 20 states have internal predecessors, (229), 0 states have call successors, (0), 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 20:05:14,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 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 20:05:14,332 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 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 20:05:14,332 INFO L186 Difference]: Start difference. First operand has 56 places, 29 transitions, 168 flow. Second operand 20 states and 229 transitions. [2021-10-15 20:05:14,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 34 transitions, 246 flow [2021-10-15 20:05:14,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 34 transitions, 215 flow, removed 0 selfloop flow, removed 13 redundant places. [2021-10-15 20:05:14,336 INFO L242 Difference]: Finished difference. Result has 64 places, 32 transitions, 205 flow [2021-10-15 20:05:14,336 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=205, PETRI_PLACES=64, PETRI_TRANSITIONS=32} [2021-10-15 20:05:14,336 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 46 predicate places. [2021-10-15 20:05:14,337 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 32 transitions, 205 flow [2021-10-15 20:05:14,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.21875) internal successors, (359), 32 states have internal predecessors, (359), 0 states have call successors, (0), 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 20:05:14,337 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:14,337 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:14,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:05:14,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:14,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1758369333, now seen corresponding path program 2 times [2021-10-15 20:05:14,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:14,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739674582] [2021-10-15 20:05:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:14,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:15,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:15,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739674582] [2021-10-15 20:05:15,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739674582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:15,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171301086] [2021-10-15 20:05:15,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:05:15,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:15,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:15,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:05:15,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:05:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:05:15,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 122 conjunts are in the unsatisfiable core [2021-10-15 20:05:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:15,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:05:15,568 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:05:15,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:05:15,683 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 20:05:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:15,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-15 20:05:15,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:15,907 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:05:15,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-15 20:05:16,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-10-15 20:05:16,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-10-15 20:05:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:05:16,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2021-10-15 20:05:16,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:16,254 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 0 case distinctions, treesize of input 64 treesize of output 48 [2021-10-15 20:05:16,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:05:16,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:16,654 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-10-15 20:05:16,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-10-15 20:05:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:16,894 INFO L354 Elim1Store]: treesize reduction 119, result has 9.8 percent of original size [2021-10-15 20:05:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 183 treesize of output 123 [2021-10-15 20:05:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:16,921 INFO L354 Elim1Store]: treesize reduction 103, result has 9.6 percent of original size [2021-10-15 20:05:16,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 150 [2021-10-15 20:05:16,930 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 0 case distinctions, treesize of input 161 treesize of output 149 [2021-10-15 20:05:16,947 INFO L354 Elim1Store]: treesize reduction 59, result has 26.3 percent of original size [2021-10-15 20:05:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 145 [2021-10-15 20:05:17,162 INFO L354 Elim1Store]: treesize reduction 133, result has 8.9 percent of original size [2021-10-15 20:05:17,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 159 [2021-10-15 20:05:17,206 INFO L354 Elim1Store]: treesize reduction 163, result has 8.4 percent of original size [2021-10-15 20:05:17,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 215 [2021-10-15 20:05:17,219 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 0 case distinctions, treesize of input 243 treesize of output 219 [2021-10-15 20:05:17,236 INFO L354 Elim1Store]: treesize reduction 87, result has 25.0 percent of original size [2021-10-15 20:05:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 204 [2021-10-15 20:05:17,865 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-15 20:05:17,866 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 10 new quantified variables, introduced 10 case distinctions, treesize of input 274 treesize of output 133 [2021-10-15 20:05:17,895 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-15 20:05:17,896 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 74 [2021-10-15 20:05:18,080 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 20:05:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-10-15 20:05:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:18,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171301086] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:18,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:05:18,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-15 20:05:18,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360179074] [2021-10-15 20:05:18,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-15 20:05:18,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:18,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-15 20:05:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-10-15 20:05:18,134 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2021-10-15 20:05:18,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 32 transitions, 205 flow. Second operand has 36 states, 36 states have (on average 10.194444444444445) internal successors, (367), 36 states have internal predecessors, (367), 0 states have call successors, (0), 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 20:05:18,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:18,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2021-10-15 20:05:18,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:22,121 INFO L129 PetriNetUnfolder]: 2/36 cut-off events. [2021-10-15 20:05:22,121 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-10-15 20:05:22,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 36 events. 2/36 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 139. Up to 5 conditions per place. [2021-10-15 20:05:22,122 INFO L132 encePairwiseOnDemand]: 21/34 looper letters, 8 selfloop transitions, 22 changer transitions 0/35 dead transitions. [2021-10-15 20:05:22,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 35 transitions, 275 flow [2021-10-15 20:05:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:05:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:05:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 229 transitions. [2021-10-15 20:05:22,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.30614973262032086 [2021-10-15 20:05:22,125 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 229 transitions. [2021-10-15 20:05:22,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 229 transitions. [2021-10-15 20:05:22,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:22,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 229 transitions. [2021-10-15 20:05:22,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 10.409090909090908) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 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 20:05:22,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 34.0) internal successors, (782), 23 states have internal predecessors, (782), 0 states have call successors, (0), 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 20:05:22,130 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 34.0) internal successors, (782), 23 states have internal predecessors, (782), 0 states have call successors, (0), 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 20:05:22,130 INFO L186 Difference]: Start difference. First operand has 64 places, 32 transitions, 205 flow. Second operand 22 states and 229 transitions. [2021-10-15 20:05:22,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 35 transitions, 275 flow [2021-10-15 20:05:22,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 35 transitions, 216 flow, removed 7 selfloop flow, removed 17 redundant places. [2021-10-15 20:05:22,134 INFO L242 Difference]: Finished difference. Result has 69 places, 33 transitions, 200 flow [2021-10-15 20:05:22,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=200, PETRI_PLACES=69, PETRI_TRANSITIONS=33} [2021-10-15 20:05:22,135 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2021-10-15 20:05:22,135 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 33 transitions, 200 flow [2021-10-15 20:05:22,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.194444444444445) internal successors, (367), 36 states have internal predecessors, (367), 0 states have call successors, (0), 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 20:05:22,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:22,136 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:22,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-15 20:05:22,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:22,358 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:22,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1870814374, now seen corresponding path program 3 times [2021-10-15 20:05:22,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:22,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781186405] [2021-10-15 20:05:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:22,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:05:22,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:22,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781186405] [2021-10-15 20:05:22,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781186405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:22,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342448885] [2021-10-15 20:05:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:05:22,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:22,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:22,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:05:22,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 20:05:22,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:05:22,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:05:22,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:05:23,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342448885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:23,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:05:23,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-15 20:05:23,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657960527] [2021-10-15 20:05:23,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:05:23,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:23,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:05:23,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:05:23,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 34 [2021-10-15 20:05:23,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 33 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:23,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:23,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 34 [2021-10-15 20:05:23,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:23,147 INFO L129 PetriNetUnfolder]: 2/41 cut-off events. [2021-10-15 20:05:23,148 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-10-15 20:05:23,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 41 events. 2/41 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 130. Up to 6 conditions per place. [2021-10-15 20:05:23,148 INFO L132 encePairwiseOnDemand]: 30/34 looper letters, 2 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2021-10-15 20:05:23,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 34 transitions, 224 flow [2021-10-15 20:05:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:05:23,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:05:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2021-10-15 20:05:23,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.773109243697479 [2021-10-15 20:05:23,151 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 184 transitions. [2021-10-15 20:05:23,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 184 transitions. [2021-10-15 20:05:23,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:23,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 184 transitions. [2021-10-15 20:05:23,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.285714285714285) internal successors, (184), 7 states have internal predecessors, (184), 0 states have call successors, (0), 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 20:05:23,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 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 20:05:23,153 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 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 20:05:23,153 INFO L186 Difference]: Start difference. First operand has 69 places, 33 transitions, 200 flow. Second operand 7 states and 184 transitions. [2021-10-15 20:05:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 34 transitions, 224 flow [2021-10-15 20:05:23,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 34 transitions, 181 flow, removed 0 selfloop flow, removed 19 redundant places. [2021-10-15 20:05:23,160 INFO L242 Difference]: Finished difference. Result has 57 places, 34 transitions, 183 flow [2021-10-15 20:05:23,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=183, PETRI_PLACES=57, PETRI_TRANSITIONS=34} [2021-10-15 20:05:23,161 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 39 predicate places. [2021-10-15 20:05:23,162 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 34 transitions, 183 flow [2021-10-15 20:05:23,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:23,162 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:23,162 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:23,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:05:23,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:23,390 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1870816048, now seen corresponding path program 3 times [2021-10-15 20:05:23,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:23,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480632506] [2021-10-15 20:05:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:23,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:24,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:24,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480632506] [2021-10-15 20:05:24,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480632506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:24,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856956877] [2021-10-15 20:05:24,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:05:24,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:24,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:24,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:05:24,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 20:05:24,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:05:24,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-15 20:05:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:24,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:05:24,933 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:05:24,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:05:25,133 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 13 treesize of output 9 [2021-10-15 20:05:25,145 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 13 treesize of output 9 [2021-10-15 20:05:25,296 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-15 20:05:25,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-15 20:05:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 20:05:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 20:05:25,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:05:25,599 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:05:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 63 [2021-10-15 20:05:25,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:05:25,623 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-10-15 20:05:25,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 73 [2021-10-15 20:05:25,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:25,965 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-10-15 20:05:25,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-10-15 20:05:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:26,196 INFO L354 Elim1Store]: treesize reduction 152, result has 12.1 percent of original size [2021-10-15 20:05:26,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 109 [2021-10-15 20:05:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:26,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:05:26,229 INFO L354 Elim1Store]: treesize reduction 134, result has 12.4 percent of original size [2021-10-15 20:05:26,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 146 [2021-10-15 20:05:26,423 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-10-15 20:05:26,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 194 treesize of output 171 [2021-10-15 20:05:26,448 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-15 20:05:26,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 159 treesize of output 94 [2021-10-15 20:05:27,352 INFO L354 Elim1Store]: treesize reduction 223, result has 5.9 percent of original size [2021-10-15 20:05:27,353 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 14 new quantified variables, introduced 21 case distinctions, treesize of input 307 treesize of output 145 [2021-10-15 20:05:27,405 INFO L354 Elim1Store]: treesize reduction 183, result has 5.2 percent of original size [2021-10-15 20:05:27,405 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 10 new quantified variables, introduced 21 case distinctions, treesize of input 82 treesize of output 68 [2021-10-15 20:05:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:05:27,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856956877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:27,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:05:27,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2021-10-15 20:05:27,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840749528] [2021-10-15 20:05:27,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-15 20:05:27,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-15 20:05:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2021-10-15 20:05:27,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2021-10-15 20:05:27,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 34 transitions, 183 flow. Second operand has 39 states, 39 states have (on average 10.205128205128204) internal successors, (398), 39 states have internal predecessors, (398), 0 states have call successors, (0), 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 20:05:27,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:27,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2021-10-15 20:05:27,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:29,298 INFO L129 PetriNetUnfolder]: 2/59 cut-off events. [2021-10-15 20:05:29,298 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2021-10-15 20:05:29,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 59 events. 2/59 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 210. Up to 25 conditions per place. [2021-10-15 20:05:29,299 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 25 selfloop transitions, 9 changer transitions 13/52 dead transitions. [2021-10-15 20:05:29,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 52 transitions, 371 flow [2021-10-15 20:05:29,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:05:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:05:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 230 transitions. [2021-10-15 20:05:29,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.32212885154061627 [2021-10-15 20:05:29,302 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 230 transitions. [2021-10-15 20:05:29,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 230 transitions. [2021-10-15 20:05:29,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:29,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 230 transitions. [2021-10-15 20:05:29,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 10.952380952380953) internal successors, (230), 21 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:29,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 0 states have call successors, (0), 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 20:05:29,306 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 0 states have call successors, (0), 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 20:05:29,306 INFO L186 Difference]: Start difference. First operand has 57 places, 34 transitions, 183 flow. Second operand 21 states and 230 transitions. [2021-10-15 20:05:29,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 52 transitions, 371 flow [2021-10-15 20:05:29,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 52 transitions, 350 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-10-15 20:05:29,311 INFO L242 Difference]: Finished difference. Result has 84 places, 35 transitions, 218 flow [2021-10-15 20:05:29,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=218, PETRI_PLACES=84, PETRI_TRANSITIONS=35} [2021-10-15 20:05:29,311 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 66 predicate places. [2021-10-15 20:05:29,312 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 35 transitions, 218 flow [2021-10-15 20:05:29,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 10.205128205128204) internal successors, (398), 39 states have internal predecessors, (398), 0 states have call successors, (0), 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 20:05:29,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:05:29,312 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:05:29,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-15 20:05:29,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:05:29,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:05:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:05:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1579335016, now seen corresponding path program 4 times [2021-10-15 20:05:29,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:05:29,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067576751] [2021-10-15 20:05:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:05:29,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:05:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:05:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-15 20:05:29,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:05:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067576751] [2021-10-15 20:05:29,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067576751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:05:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106252090] [2021-10-15 20:05:29,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:05:29,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:05:29,598 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:05:29,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:05:29,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:05:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:05:29,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:05:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:05:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-15 20:05:30,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106252090] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:05:30,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:05:30,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-10-15 20:05:30,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444575727] [2021-10-15 20:05:30,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:05:30,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:05:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:05:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:05:30,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 34 [2021-10-15 20:05:30,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 35 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 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 20:05:30,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:05:30,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 34 [2021-10-15 20:05:30,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:05:30,105 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-10-15 20:05:30,106 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-10-15 20:05:30,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 13 events. 0/13 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:05:30,106 INFO L132 encePairwiseOnDemand]: 31/34 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-10-15 20:05:30,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 12 transitions, 74 flow [2021-10-15 20:05:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:05:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:05:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2021-10-15 20:05:30,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8058823529411765 [2021-10-15 20:05:30,108 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 137 transitions. [2021-10-15 20:05:30,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 137 transitions. [2021-10-15 20:05:30,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:05:30,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 137 transitions. [2021-10-15 20:05:30,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:05:30,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 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 20:05:30,110 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 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 20:05:30,110 INFO L186 Difference]: Start difference. First operand has 84 places, 35 transitions, 218 flow. Second operand 5 states and 137 transitions. [2021-10-15 20:05:30,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 12 transitions, 74 flow [2021-10-15 20:05:30,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 12 transitions, 58 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-10-15 20:05:30,111 INFO L242 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2021-10-15 20:05:30,111 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2021-10-15 20:05:30,112 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 27 predicate places. [2021-10-15 20:05:30,112 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2021-10-15 20:05:30,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 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 20:05:30,115 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:05:30,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:05:30,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:05:30,341 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:05:30,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:05:30 BoogieIcfgContainer [2021-10-15 20:05:30,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:05:30,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:05:30,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:05:30,345 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:05:30,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:05:03" (3/4) ... [2021-10-15 20:05:30,348 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:05:30,359 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-15 20:05:30,359 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-15 20:05:30,359 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:05:30,360 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:05:30,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:05:30,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:05:30,401 INFO L168 Benchmark]: Toolchain (without parser) took 28299.78 ms. Allocated memory was 88.1 MB in the beginning and 188.7 MB in the end (delta: 100.7 MB). Free memory was 51.6 MB in the beginning and 133.7 MB in the end (delta: -82.2 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:05:30,401 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 58.9 MB in the beginning and 58.9 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:05:30,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.62 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 51.6 MB in the beginning and 73.5 MB in the end (delta: -21.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:05:30,402 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.43 ms. Allocated memory is still 107.0 MB. Free memory was 73.5 MB in the beginning and 71.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:05:30,403 INFO L168 Benchmark]: Boogie Preprocessor took 66.82 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 69.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:05:30,403 INFO L168 Benchmark]: RCFGBuilder took 458.35 ms. Allocated memory is still 107.0 MB. Free memory was 69.6 MB in the beginning and 56.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:05:30,403 INFO L168 Benchmark]: TraceAbstraction took 27148.31 ms. Allocated memory was 107.0 MB in the beginning and 188.7 MB in the end (delta: 81.8 MB). Free memory was 56.1 MB in the beginning and 136.7 MB in the end (delta: -80.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:05:30,404 INFO L168 Benchmark]: Witness Printer took 55.38 ms. Allocated memory is still 188.7 MB. Free memory was 136.7 MB in the beginning and 133.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:05:30,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 58.9 MB in the beginning and 58.9 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 490.62 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 51.6 MB in the beginning and 73.5 MB in the end (delta: -21.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.43 ms. Allocated memory is still 107.0 MB. Free memory was 73.5 MB in the beginning and 71.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.82 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 69.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 458.35 ms. Allocated memory is still 107.0 MB. Free memory was 69.6 MB in the beginning and 56.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 27148.31 ms. Allocated memory was 107.0 MB in the beginning and 188.7 MB in the end (delta: 81.8 MB). Free memory was 56.1 MB in the beginning and 136.7 MB in the end (delta: -80.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. * Witness Printer took 55.38 ms. Allocated memory is still 188.7 MB. Free memory was 136.7 MB in the beginning and 133.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 624]: 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: 4.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 27089.1ms, OverallIterations: 12, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 10136.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 37 SDtfs, 414 SDslu, 133 SDs, 0 SdLazy, 2087 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2572.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 397 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 11451.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred in iteration=11, InterpolantAutomatonStates: 129, 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: 160.2ms SsaConstructionTime, 1123.8ms SatisfiabilityAnalysisTime, 12226.7ms InterpolantComputationTime, 480 NumberOfCodeBlocks, 479 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 460 ConstructedInterpolants, 15 QuantifiedInterpolants, 10139 SizeOfPredicates, 192 NumberOfNonLiveVariables, 1662 ConjunctsInSsa, 459 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 105/228 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 20:05:30,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23597c5-2227-4413-a30c-6b1dd575f4e1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...