./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa --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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:59:35,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:59:35,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:59:35,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:59:35,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:59:35,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:59:35,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:59:35,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:59:35,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:59:35,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:59:35,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:59:35,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:59:35,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:59:35,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:59:35,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:59:35,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:59:35,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:59:35,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:59:35,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:59:35,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:59:35,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:59:35,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:59:35,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:59:35,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:59:35,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:59:35,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:59:35,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:59:35,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:59:35,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:59:35,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:59:35,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:59:35,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:59:35,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:59:35,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:59:35,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:59:35,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:59:35,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:59:35,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:59:35,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:59:35,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:59:35,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:59:35,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:59:35,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:59:35,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:59:35,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:59:35,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:59:35,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:59:35,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:59:35,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:59:35,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:59:35,860 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:59:35,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:59:35,860 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:59:35,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:59:35,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:59:35,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:59:35,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:59:35,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:59:35,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:59:35,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:59:35,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:59:35,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:59:35,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:59:35,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:59:35,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:59:35,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:59:35,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:59:35,863 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_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2021-12-06 23:59:36,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:59:36,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:59:36,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:59:36,066 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:59:36,067 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:59:36,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-06 23:59:36,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/data/78f12d422/58ff2c1f17794e7698221f8532b68c8a/FLAGf5d1bc707 [2021-12-06 23:59:36,480 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:59:36,480 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-06 23:59:36,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/data/78f12d422/58ff2c1f17794e7698221f8532b68c8a/FLAGf5d1bc707 [2021-12-06 23:59:36,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/data/78f12d422/58ff2c1f17794e7698221f8532b68c8a [2021-12-06 23:59:36,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:59:36,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:59:36,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:59:36,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:59:36,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:59:36,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14003a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36, skipping insertion in model container [2021-12-06 23:59:36,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:59:36,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:59:36,659 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-06 23:59:36,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:59:36,670 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:59:36,688 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-06 23:59:36,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:59:36,703 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:59:36,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36 WrapperNode [2021-12-06 23:59:36,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:59:36,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:59:36,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:59:36,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:59:36,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,738 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2021-12-06 23:59:36,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:59:36,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:59:36,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:59:36,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:59:36,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:59:36,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:59:36,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:59:36,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:59:36,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (1/1) ... [2021-12-06 23:59:36,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:59:36,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:36,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:59:36,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:59:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:59:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 23:59:36,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 23:59:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 23:59:36,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:59:36,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:59:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:59:36,824 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 23:59:36,880 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:59:36,882 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:59:37,011 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:59:37,040 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:59:37,040 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:59:37,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:59:37 BoogieIcfgContainer [2021-12-06 23:59:37,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:59:37,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:59:37,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:59:37,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:59:37,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:59:36" (1/3) ... [2021-12-06 23:59:37,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b22a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:59:37, skipping insertion in model container [2021-12-06 23:59:37,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:59:36" (2/3) ... [2021-12-06 23:59:37,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b22a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:59:37, skipping insertion in model container [2021-12-06 23:59:37,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:59:37" (3/3) ... [2021-12-06 23:59:37,048 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2021-12-06 23:59:37,052 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 23:59:37,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:59:37,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:59:37,052 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 23:59:37,075 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,075 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,075 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,075 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,076 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,076 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,076 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,076 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,076 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,076 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,077 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,081 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,081 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,081 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,082 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,090 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,090 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,090 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,090 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,090 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:59:37,093 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 23:59:37,128 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:59:37,134 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:59:37,134 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 23:59:37,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2021-12-06 23:59:37,177 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-12-06 23:59:37,177 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 23:59:37,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-06 23:59:37,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2021-12-06 23:59:37,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2021-12-06 23:59:37,201 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-12-06 23:59:37,201 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 23:59:37,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:37,201 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:37,202 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2021-12-06 23:59:37,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494994314] [2021-12-06 23:59:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:37,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:37,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494994314] [2021-12-06 23:59:37,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494994314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:37,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:37,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:59:37,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143549720] [2021-12-06 23:59:37,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:37,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:59:37,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:37,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:59:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:59:37,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2021-12-06 23:59:37,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:37,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:37,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2021-12-06 23:59:37,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:37,438 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2021-12-06 23:59:37,438 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-12-06 23:59:37,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2021-12-06 23:59:37,440 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2021-12-06 23:59:37,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2021-12-06 23:59:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:59:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 23:59:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-12-06 23:59:37,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2021-12-06 23:59:37,454 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-12-06 23:59:37,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-12-06 23:59:37,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:37,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-12-06 23:59:37,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:37,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:37,467 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:37,468 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2021-12-06 23:59:37,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2021-12-06 23:59:37,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 23:59:37,476 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2021-12-06 23:59:37,478 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2021-12-06 23:59:37,482 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2021-12-06 23:59:37,483 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2021-12-06 23:59:37,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:37,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:37,483 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:37,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:59:37,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2021-12-06 23:59:37,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:37,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495065485] [2021-12-06 23:59:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:37,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:37,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:37,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495065485] [2021-12-06 23:59:37,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495065485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:37,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:37,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 23:59:37,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32557451] [2021-12-06 23:59:37,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:37,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:59:37,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:59:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:59:38,000 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-06 23:59:38,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:38,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-06 23:59:38,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:38,302 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2021-12-06 23:59:38,302 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-06 23:59:38,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2021-12-06 23:59:38,304 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2021-12-06 23:59:38,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2021-12-06 23:59:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:59:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 23:59:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2021-12-06 23:59:38,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2021-12-06 23:59:38,309 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2021-12-06 23:59:38,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2021-12-06 23:59:38,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:38,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2021-12-06 23:59:38,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,318 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,318 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2021-12-06 23:59:38,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2021-12-06 23:59:38,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 23:59:38,321 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2021-12-06 23:59:38,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2021-12-06 23:59:38,322 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2021-12-06 23:59:38,322 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2021-12-06 23:59:38,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:38,323 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:38,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:59:38,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2021-12-06 23:59:38,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:38,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365988342] [2021-12-06 23:59:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:38,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:38,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:38,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365988342] [2021-12-06 23:59:38,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365988342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:38,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:38,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 23:59:38,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380319626] [2021-12-06 23:59:38,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:38,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:59:38,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:38,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:59:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:59:38,592 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-06 23:59:38,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:38,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-06 23:59:38,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:38,811 INFO L129 PetriNetUnfolder]: 68/263 cut-off events. [2021-12-06 23:59:38,812 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2021-12-06 23:59:38,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 263 events. 68/263 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1086 event pairs, 35 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 530. Up to 102 conditions per place. [2021-12-06 23:59:38,814 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2021-12-06 23:59:38,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2021-12-06 23:59:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:59:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 23:59:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-12-06 23:59:38,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2021-12-06 23:59:38,817 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-12-06 23:59:38,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-12-06 23:59:38,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:38,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-12-06 23:59:38,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,822 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,822 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2021-12-06 23:59:38,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2021-12-06 23:59:38,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-12-06 23:59:38,826 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2021-12-06 23:59:38,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2021-12-06 23:59:38,827 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2021-12-06 23:59:38,828 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2021-12-06 23:59:38,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:38,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:38,828 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:38,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:59:38,829 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash -9274299, now seen corresponding path program 3 times [2021-12-06 23:59:38,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:38,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119043470] [2021-12-06 23:59:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:38,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:39,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119043470] [2021-12-06 23:59:39,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119043470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:39,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:39,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 23:59:39,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687068852] [2021-12-06 23:59:39,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:39,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:59:39,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:39,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:59:39,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:59:39,099 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-06 23:59:39,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:39,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-06 23:59:39,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:39,380 INFO L129 PetriNetUnfolder]: 72/296 cut-off events. [2021-12-06 23:59:39,380 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2021-12-06 23:59:39,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 296 events. 72/296 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1335 event pairs, 37 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 652. Up to 105 conditions per place. [2021-12-06 23:59:39,383 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2021-12-06 23:59:39,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2021-12-06 23:59:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:59:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 23:59:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2021-12-06 23:59:39,386 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2021-12-06 23:59:39,386 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2021-12-06 23:59:39,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2021-12-06 23:59:39,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:39,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2021-12-06 23:59:39,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,390 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,391 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2021-12-06 23:59:39,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2021-12-06 23:59:39,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-06 23:59:39,396 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2021-12-06 23:59:39,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2021-12-06 23:59:39,397 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2021-12-06 23:59:39,397 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2021-12-06 23:59:39,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:39,398 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:39,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:59:39,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash 269524785, now seen corresponding path program 4 times [2021-12-06 23:59:39,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128824993] [2021-12-06 23:59:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:39,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:39,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128824993] [2021-12-06 23:59:39,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128824993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:39,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:39,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 23:59:39,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75502777] [2021-12-06 23:59:39,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:39,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:59:39,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:59:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:59:39,677 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-06 23:59:39,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:39,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-06 23:59:39,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:39,978 INFO L129 PetriNetUnfolder]: 71/297 cut-off events. [2021-12-06 23:59:39,978 INFO L130 PetriNetUnfolder]: For 225/234 co-relation queries the response was YES. [2021-12-06 23:59:39,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 297 events. 71/297 cut-off events. For 225/234 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1363 event pairs, 40 based on Foata normal form. 3/293 useless extension candidates. Maximal degree in co-relation 670. Up to 105 conditions per place. [2021-12-06 23:59:39,980 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2021-12-06 23:59:39,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2021-12-06 23:59:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:59:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 23:59:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2021-12-06 23:59:39,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2021-12-06 23:59:39,983 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2021-12-06 23:59:39,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2021-12-06 23:59:39,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:39,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2021-12-06 23:59:39,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,987 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,987 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2021-12-06 23:59:39,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2021-12-06 23:59:39,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-12-06 23:59:39,992 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2021-12-06 23:59:39,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-12-06 23:59:39,993 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2021-12-06 23:59:39,993 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2021-12-06 23:59:39,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:39,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:39,993 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:39,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:59:39,994 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:39,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1546636013, now seen corresponding path program 5 times [2021-12-06 23:59:39,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:39,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539326253] [2021-12-06 23:59:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:39,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:40,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539326253] [2021-12-06 23:59:40,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539326253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:40,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:40,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 23:59:40,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84509530] [2021-12-06 23:59:40,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:40,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:59:40,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:59:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:59:40,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-06 23:59:40,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:40,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-06 23:59:40,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:40,490 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2021-12-06 23:59:40,490 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2021-12-06 23:59:40,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1255 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2021-12-06 23:59:40,492 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2021-12-06 23:59:40,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2021-12-06 23:59:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:59:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 23:59:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-12-06 23:59:40,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2021-12-06 23:59:40,495 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-12-06 23:59:40,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-12-06 23:59:40,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:40,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-12-06 23:59:40,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,499 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,499 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2021-12-06 23:59:40,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2021-12-06 23:59:40,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-12-06 23:59:40,503 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2021-12-06 23:59:40,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2021-12-06 23:59:40,504 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2021-12-06 23:59:40,504 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2021-12-06 23:59:40,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,504 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:40,504 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:40,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:59:40,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2021-12-06 23:59:40,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96976665] [2021-12-06 23:59:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:40,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:40,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96976665] [2021-12-06 23:59:40,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96976665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:40,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:40,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 23:59:40,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333948102] [2021-12-06 23:59:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:40,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:59:40,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:40,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:59:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:59:40,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-06 23:59:40,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:40,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-06 23:59:40,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:40,963 INFO L129 PetriNetUnfolder]: 68/250 cut-off events. [2021-12-06 23:59:40,963 INFO L130 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2021-12-06 23:59:40,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 250 events. 68/250 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1003 event pairs, 34 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 620. Up to 105 conditions per place. [2021-12-06 23:59:40,965 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2021-12-06 23:59:40,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2021-12-06 23:59:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:59:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 23:59:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2021-12-06 23:59:40,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2021-12-06 23:59:40,967 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2021-12-06 23:59:40,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2021-12-06 23:59:40,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:40,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2021-12-06 23:59:40,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,971 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,971 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2021-12-06 23:59:40,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2021-12-06 23:59:40,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-06 23:59:40,975 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2021-12-06 23:59:40,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2021-12-06 23:59:40,976 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2021-12-06 23:59:40,976 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2021-12-06 23:59:40,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:40,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:40,977 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:40,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:59:40,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash 239848237, now seen corresponding path program 1 times [2021-12-06 23:59:40,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:40,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029168862] [2021-12-06 23:59:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:40,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:41,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029168862] [2021-12-06 23:59:41,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029168862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347387501] [2021-12-06 23:59:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:41,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:41,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:41,164 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:59:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:59:41,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:41,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347387501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:42,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:42,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-06 23:59:42,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642530883] [2021-12-06 23:59:42,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:42,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:59:42,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:59:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:59:42,231 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-06 23:59:42,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:42,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:42,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-06 23:59:42,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:43,506 INFO L129 PetriNetUnfolder]: 168/590 cut-off events. [2021-12-06 23:59:43,506 INFO L130 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2021-12-06 23:59:43,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 590 events. 168/590 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3240 event pairs, 9 based on Foata normal form. 13/603 useless extension candidates. Maximal degree in co-relation 1295. Up to 111 conditions per place. [2021-12-06 23:59:43,512 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2021-12-06 23:59:43,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2021-12-06 23:59:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 23:59:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-06 23:59:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2021-12-06 23:59:43,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2021-12-06 23:59:43,521 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2021-12-06 23:59:43,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2021-12-06 23:59:43,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:43,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2021-12-06 23:59:43,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:43,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:43,548 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:43,548 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2021-12-06 23:59:43,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2021-12-06 23:59:43,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2021-12-06 23:59:43,557 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2021-12-06 23:59:43,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2021-12-06 23:59:43,558 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2021-12-06 23:59:43,558 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2021-12-06 23:59:43,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:43,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:43,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:43,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:59:43,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:43,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1281133469, now seen corresponding path program 2 times [2021-12-06 23:59:43,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:43,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448250945] [2021-12-06 23:59:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:43,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:44,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:44,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448250945] [2021-12-06 23:59:44,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448250945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:44,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917907081] [2021-12-06 23:59:44,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:59:44,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:44,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:44,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:59:44,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:59:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:59:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:44,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:44,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917907081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:44,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:44,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-06 23:59:44,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146923591] [2021-12-06 23:59:44,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:44,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:59:44,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:59:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:59:44,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-06 23:59:44,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:44,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:44,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-06 23:59:44,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:45,950 INFO L129 PetriNetUnfolder]: 210/755 cut-off events. [2021-12-06 23:59:45,950 INFO L130 PetriNetUnfolder]: For 675/689 co-relation queries the response was YES. [2021-12-06 23:59:45,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 755 events. 210/755 cut-off events. For 675/689 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4606 event pairs, 27 based on Foata normal form. 5/758 useless extension candidates. Maximal degree in co-relation 2064. Up to 213 conditions per place. [2021-12-06 23:59:45,956 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2021-12-06 23:59:45,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1798 flow [2021-12-06 23:59:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 23:59:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-06 23:59:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2021-12-06 23:59:45,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2021-12-06 23:59:45,959 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2021-12-06 23:59:45,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2021-12-06 23:59:45,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:45,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2021-12-06 23:59:45,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:45,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:45,968 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:45,968 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 39 states and 2186 transitions. [2021-12-06 23:59:45,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1798 flow [2021-12-06 23:59:45,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1645 flow, removed 61 selfloop flow, removed 9 redundant places. [2021-12-06 23:59:45,978 INFO L242 Difference]: Finished difference. Result has 186 places, 205 transitions, 1291 flow [2021-12-06 23:59:45,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1291, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2021-12-06 23:59:45,979 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2021-12-06 23:59:45,979 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1291 flow [2021-12-06 23:59:45,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:45,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:45,980 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:46,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:59:46,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:46,181 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash -333452397, now seen corresponding path program 3 times [2021-12-06 23:59:46,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:46,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41653068] [2021-12-06 23:59:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:46,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:46,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:46,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41653068] [2021-12-06 23:59:46,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41653068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:46,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257851511] [2021-12-06 23:59:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:59:46,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:46,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:46,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:59:46,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 23:59:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:59:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:46,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:47,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257851511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:47,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:47,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-06 23:59:47,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485501282] [2021-12-06 23:59:47,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:47,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:59:47,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:59:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:59:47,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-06 23:59:47,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1291 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:47,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:47,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-06 23:59:47,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:48,824 INFO L129 PetriNetUnfolder]: 224/807 cut-off events. [2021-12-06 23:59:48,824 INFO L130 PetriNetUnfolder]: For 1127/1127 co-relation queries the response was YES. [2021-12-06 23:59:48,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2555 conditions, 807 events. 224/807 cut-off events. For 1127/1127 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5014 event pairs, 18 based on Foata normal form. 1/799 useless extension candidates. Maximal degree in co-relation 2524. Up to 131 conditions per place. [2021-12-06 23:59:48,830 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 121 selfloop transitions, 159 changer transitions 6/328 dead transitions. [2021-12-06 23:59:48,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 328 transitions, 2549 flow [2021-12-06 23:59:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 23:59:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-12-06 23:59:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3081 transitions. [2021-12-06 23:59:48,834 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.629417773237998 [2021-12-06 23:59:48,834 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3081 transitions. [2021-12-06 23:59:48,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3081 transitions. [2021-12-06 23:59:48,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:48,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3081 transitions. [2021-12-06 23:59:48,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 56.018181818181816) internal successors, (3081), 55 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:48,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:48,845 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:48,845 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 1291 flow. Second operand 55 states and 3081 transitions. [2021-12-06 23:59:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 328 transitions, 2549 flow [2021-12-06 23:59:48,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 328 transitions, 2502 flow, removed 17 selfloop flow, removed 8 redundant places. [2021-12-06 23:59:48,857 INFO L242 Difference]: Finished difference. Result has 238 places, 244 transitions, 1968 flow [2021-12-06 23:59:48,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1968, PETRI_PLACES=238, PETRI_TRANSITIONS=244} [2021-12-06 23:59:48,858 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 159 predicate places. [2021-12-06 23:59:48,858 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 244 transitions, 1968 flow [2021-12-06 23:59:48,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:48,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:48,859 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:48,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:59:49,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:59:49,060 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash 569216823, now seen corresponding path program 4 times [2021-12-06 23:59:49,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:49,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570669019] [2021-12-06 23:59:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:49,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:49,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570669019] [2021-12-06 23:59:49,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570669019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984608326] [2021-12-06 23:59:49,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:59:49,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:49,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:49,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:49,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:59:49,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:59:49,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:49,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:59:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:49,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:50,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984608326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:50,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:50,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-06 23:59:50,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078187940] [2021-12-06 23:59:50,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:50,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:59:50,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:59:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:59:50,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-06 23:59:50,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 244 transitions, 1968 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:50,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:50,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-06 23:59:50,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:53,937 INFO L129 PetriNetUnfolder]: 465/1601 cut-off events. [2021-12-06 23:59:53,937 INFO L130 PetriNetUnfolder]: For 5294/5296 co-relation queries the response was YES. [2021-12-06 23:59:53,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6039 conditions, 1601 events. 465/1601 cut-off events. For 5294/5296 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12239 event pairs, 4 based on Foata normal form. 5/1595 useless extension candidates. Maximal degree in co-relation 6001. Up to 185 conditions per place. [2021-12-06 23:59:53,951 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 225 selfloop transitions, 367 changer transitions 15/649 dead transitions. [2021-12-06 23:59:53,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 649 transitions, 6277 flow [2021-12-06 23:59:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-06 23:59:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-12-06 23:59:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 6273 transitions. [2021-12-06 23:59:53,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6293138041733547 [2021-12-06 23:59:53,960 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 6273 transitions. [2021-12-06 23:59:53,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 6273 transitions. [2021-12-06 23:59:53,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:53,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 6273 transitions. [2021-12-06 23:59:53,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 56.00892857142857) internal successors, (6273), 112 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:53,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:53,982 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:53,983 INFO L186 Difference]: Start difference. First operand has 238 places, 244 transitions, 1968 flow. Second operand 112 states and 6273 transitions. [2021-12-06 23:59:53,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 649 transitions, 6277 flow [2021-12-06 23:59:54,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 649 transitions, 5939 flow, removed 45 selfloop flow, removed 19 redundant places. [2021-12-06 23:59:54,014 INFO L242 Difference]: Finished difference. Result has 352 places, 467 transitions, 4535 flow [2021-12-06 23:59:54,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=4535, PETRI_PLACES=352, PETRI_TRANSITIONS=467} [2021-12-06 23:59:54,015 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 273 predicate places. [2021-12-06 23:59:54,015 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 467 transitions, 4535 flow [2021-12-06 23:59:54,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:54,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:54,016 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:54,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:59:54,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:54,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:54,217 INFO L85 PathProgramCache]: Analyzing trace with hash 688614497, now seen corresponding path program 5 times [2021-12-06 23:59:54,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:54,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803317317] [2021-12-06 23:59:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:54,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:54,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:54,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803317317] [2021-12-06 23:59:54,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803317317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:54,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189588738] [2021-12-06 23:59:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:59:54,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:54,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:54,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:54,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:59:54,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:59:54,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:54,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:59:54,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:54,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:55,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189588738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:55,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:55,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-06 23:59:55,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116455019] [2021-12-06 23:59:55,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:55,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:59:55,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:59:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:59:55,229 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-06 23:59:55,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 467 transitions, 4535 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:55,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:55,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-06 23:59:55,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:56,040 INFO L129 PetriNetUnfolder]: 463/1600 cut-off events. [2021-12-06 23:59:56,040 INFO L130 PetriNetUnfolder]: For 10506/10506 co-relation queries the response was YES. [2021-12-06 23:59:56,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 1600 events. 463/1600 cut-off events. For 10506/10506 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12200 event pairs, 39 based on Foata normal form. 1/1593 useless extension candidates. Maximal degree in co-relation 7353. Up to 576 conditions per place. [2021-12-06 23:59:56,059 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 187 selfloop transitions, 279 changer transitions 6/514 dead transitions. [2021-12-06 23:59:56,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 514 transitions, 5959 flow [2021-12-06 23:59:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:59:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 23:59:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2021-12-06 23:59:56,061 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6274848746758859 [2021-12-06 23:59:56,061 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2021-12-06 23:59:56,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2021-12-06 23:59:56,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:56,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2021-12-06 23:59:56,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.84615384615385) internal successors, (1452), 26 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:56,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:56,065 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:56,065 INFO L186 Difference]: Start difference. First operand has 352 places, 467 transitions, 4535 flow. Second operand 26 states and 1452 transitions. [2021-12-06 23:59:56,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 514 transitions, 5959 flow [2021-12-06 23:59:56,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 514 transitions, 5401 flow, removed 167 selfloop flow, removed 26 redundant places. [2021-12-06 23:59:56,119 INFO L242 Difference]: Finished difference. Result has 350 places, 477 transitions, 4958 flow [2021-12-06 23:59:56,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4958, PETRI_PLACES=350, PETRI_TRANSITIONS=477} [2021-12-06 23:59:56,120 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 271 predicate places. [2021-12-06 23:59:56,121 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 477 transitions, 4958 flow [2021-12-06 23:59:56,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:56,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:56,121 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:56,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:59:56,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:59:56,323 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2045613305, now seen corresponding path program 6 times [2021-12-06 23:59:56,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674075283] [2021-12-06 23:59:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:56,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:56,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:56,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674075283] [2021-12-06 23:59:56,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674075283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627181854] [2021-12-06 23:59:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:59:56,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:56,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:56,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:56,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:59:56,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 23:59:56,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:59:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:57,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:57,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627181854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:57,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:57,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-06 23:59:57,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072057579] [2021-12-06 23:59:57,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:57,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:59:57,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:59:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:59:57,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-06 23:59:57,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 477 transitions, 4958 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:57,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:59:57,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-06 23:59:57,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:59:58,804 INFO L129 PetriNetUnfolder]: 585/1949 cut-off events. [2021-12-06 23:59:58,804 INFO L130 PetriNetUnfolder]: For 12603/12603 co-relation queries the response was YES. [2021-12-06 23:59:58,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9014 conditions, 1949 events. 585/1949 cut-off events. For 12603/12603 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15548 event pairs, 31 based on Foata normal form. 1/1936 useless extension candidates. Maximal degree in co-relation 8952. Up to 566 conditions per place. [2021-12-06 23:59:58,826 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 256 selfloop transitions, 348 changer transitions 6/652 dead transitions. [2021-12-06 23:59:58,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 652 transitions, 7771 flow [2021-12-06 23:59:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 23:59:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-06 23:59:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2021-12-06 23:59:58,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2021-12-06 23:59:58,829 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2021-12-06 23:59:58,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2021-12-06 23:59:58,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:59:58,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2021-12-06 23:59:58,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:58,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:58,835 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:58,835 INFO L186 Difference]: Start difference. First operand has 350 places, 477 transitions, 4958 flow. Second operand 39 states and 2185 transitions. [2021-12-06 23:59:58,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 652 transitions, 7771 flow [2021-12-06 23:59:58,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 652 transitions, 7483 flow, removed 9 selfloop flow, removed 17 redundant places. [2021-12-06 23:59:58,912 INFO L242 Difference]: Finished difference. Result has 380 places, 561 transitions, 6838 flow [2021-12-06 23:59:58,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6838, PETRI_PLACES=380, PETRI_TRANSITIONS=561} [2021-12-06 23:59:58,913 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 301 predicate places. [2021-12-06 23:59:58,913 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 561 transitions, 6838 flow [2021-12-06 23:59:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:58,914 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:59:58,914 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:58,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:59:59,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 23:59:59,114 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:59:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash -247596831, now seen corresponding path program 7 times [2021-12-06 23:59:59,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:59,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674003964] [2021-12-06 23:59:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:59,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:59,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:59,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674003964] [2021-12-06 23:59:59,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674003964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:59,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444472516] [2021-12-06 23:59:59,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:59:59,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:59,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:59,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:59,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:59:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:59:59,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:59:59,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:00,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444472516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:00,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:00,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-12-07 00:00:00,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77192730] [2021-12-07 00:00:00,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:00,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:00:00,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:00:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:00:00,017 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:00,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 561 transitions, 6838 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:00,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:00,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:00,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:02,201 INFO L129 PetriNetUnfolder]: 671/2175 cut-off events. [2021-12-07 00:00:02,201 INFO L130 PetriNetUnfolder]: For 18651/18651 co-relation queries the response was YES. [2021-12-07 00:00:02,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11245 conditions, 2175 events. 671/2175 cut-off events. For 18651/18651 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17760 event pairs, 27 based on Foata normal form. 1/2160 useless extension candidates. Maximal degree in co-relation 11174. Up to 581 conditions per place. [2021-12-07 00:00:02,227 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 211 selfloop transitions, 512 changer transitions 6/771 dead transitions. [2021-12-07 00:00:02,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 771 transitions, 10453 flow [2021-12-07 00:00:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-07 00:00:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-07 00:00:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3334 transitions. [2021-12-07 00:00:02,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6243445692883896 [2021-12-07 00:00:02,231 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3334 transitions. [2021-12-07 00:00:02,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3334 transitions. [2021-12-07 00:00:02,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:02,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3334 transitions. [2021-12-07 00:00:02,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 55.56666666666667) internal successors, (3334), 60 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:02,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:02,255 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:02,256 INFO L186 Difference]: Start difference. First operand has 380 places, 561 transitions, 6838 flow. Second operand 60 states and 3334 transitions. [2021-12-07 00:00:02,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 771 transitions, 10453 flow [2021-12-07 00:00:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 771 transitions, 10290 flow, removed 48 selfloop flow, removed 15 redundant places. [2021-12-07 00:00:02,366 INFO L242 Difference]: Finished difference. Result has 434 places, 696 transitions, 9993 flow [2021-12-07 00:00:02,367 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9993, PETRI_PLACES=434, PETRI_TRANSITIONS=696} [2021-12-07 00:00:02,367 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 355 predicate places. [2021-12-07 00:00:02,367 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 696 transitions, 9993 flow [2021-12-07 00:00:02,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:02,368 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:02,368 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:02,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:00:02,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:02,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash 479406539, now seen corresponding path program 8 times [2021-12-07 00:00:02,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:02,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873934614] [2021-12-07 00:00:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:02,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:02,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873934614] [2021-12-07 00:00:02,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873934614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623139495] [2021-12-07 00:00:02,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:00:02,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:02,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:02,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:00:02,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:00:02,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:02,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:03,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:03,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623139495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:03,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:03,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-07 00:00:03,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923106720] [2021-12-07 00:00:03,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:03,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:00:03,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:00:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 00:00:03,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:03,464 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 696 transitions, 9993 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:03,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:03,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:03,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:06,955 INFO L129 PetriNetUnfolder]: 778/2548 cut-off events. [2021-12-07 00:00:06,955 INFO L130 PetriNetUnfolder]: For 27736/27736 co-relation queries the response was YES. [2021-12-07 00:00:06,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14596 conditions, 2548 events. 778/2548 cut-off events. For 27736/27736 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21976 event pairs, 29 based on Foata normal form. 1/2531 useless extension candidates. Maximal degree in co-relation 14516. Up to 564 conditions per place. [2021-12-07 00:00:06,985 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 214 selfloop transitions, 610 changer transitions 6/872 dead transitions. [2021-12-07 00:00:06,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 872 transitions, 13695 flow [2021-12-07 00:00:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-07 00:00:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-12-07 00:00:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4761 transitions. [2021-12-07 00:00:06,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220276979357199 [2021-12-07 00:00:06,989 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4761 transitions. [2021-12-07 00:00:06,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4761 transitions. [2021-12-07 00:00:06,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:06,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4761 transitions. [2021-12-07 00:00:06,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 55.36046511627907) internal successors, (4761), 86 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:07,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:07,003 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:07,003 INFO L186 Difference]: Start difference. First operand has 434 places, 696 transitions, 9993 flow. Second operand 86 states and 4761 transitions. [2021-12-07 00:00:07,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 872 transitions, 13695 flow [2021-12-07 00:00:07,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 872 transitions, 13295 flow, removed 94 selfloop flow, removed 26 redundant places. [2021-12-07 00:00:07,196 INFO L242 Difference]: Finished difference. Result has 498 places, 787 transitions, 12459 flow [2021-12-07 00:00:07,197 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=12459, PETRI_PLACES=498, PETRI_TRANSITIONS=787} [2021-12-07 00:00:07,197 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 419 predicate places. [2021-12-07 00:00:07,197 INFO L470 AbstractCegarLoop]: Abstraction has has 498 places, 787 transitions, 12459 flow [2021-12-07 00:00:07,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:07,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:07,198 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:07,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:00:07,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:00:07,399 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:07,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1836891633, now seen corresponding path program 9 times [2021-12-07 00:00:07,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:07,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138631504] [2021-12-07 00:00:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:07,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:07,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138631504] [2021-12-07 00:00:07,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138631504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835445810] [2021-12-07 00:00:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:00:07,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:07,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:07,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:00:07,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 00:00:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:07,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:08,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835445810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:08,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:08,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:08,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126481649] [2021-12-07 00:00:08,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:08,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:08,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:08,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:08,370 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:08,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 787 transitions, 12459 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:08,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:08,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:08,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:09,919 INFO L129 PetriNetUnfolder]: 787/2775 cut-off events. [2021-12-07 00:00:09,919 INFO L130 PetriNetUnfolder]: For 33280/33280 co-relation queries the response was YES. [2021-12-07 00:00:09,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16249 conditions, 2775 events. 787/2775 cut-off events. For 33280/33280 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 25094 event pairs, 53 based on Foata normal form. 1/2759 useless extension candidates. Maximal degree in co-relation 16163. Up to 1037 conditions per place. [2021-12-07 00:00:09,949 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 324 selfloop transitions, 462 changer transitions 6/834 dead transitions. [2021-12-07 00:00:09,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 834 transitions, 14549 flow [2021-12-07 00:00:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 00:00:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-07 00:00:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-12-07 00:00:09,953 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2021-12-07 00:00:09,953 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-12-07 00:00:09,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-12-07 00:00:09,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:09,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-12-07 00:00:09,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:09,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:09,960 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:09,960 INFO L186 Difference]: Start difference. First operand has 498 places, 787 transitions, 12459 flow. Second operand 32 states and 1783 transitions. [2021-12-07 00:00:09,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 834 transitions, 14549 flow [2021-12-07 00:00:10,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 834 transitions, 13812 flow, removed 118 selfloop flow, removed 54 redundant places. [2021-12-07 00:00:10,194 INFO L242 Difference]: Finished difference. Result has 480 places, 800 transitions, 13327 flow [2021-12-07 00:00:10,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11736, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13327, PETRI_PLACES=480, PETRI_TRANSITIONS=800} [2021-12-07 00:00:10,195 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 401 predicate places. [2021-12-07 00:00:10,195 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 800 transitions, 13327 flow [2021-12-07 00:00:10,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:10,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:10,195 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:10,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:00:10,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:10,396 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash 315383393, now seen corresponding path program 10 times [2021-12-07 00:00:10,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:10,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053554969] [2021-12-07 00:00:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:10,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:10,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:10,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053554969] [2021-12-07 00:00:10,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053554969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:10,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419845385] [2021-12-07 00:00:10,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:00:10,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:10,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:10,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:10,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:00:10,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:00:10,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:10,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:10,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:11,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419845385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:11,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:11,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:11,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257716355] [2021-12-07 00:00:11,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:11,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:11,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:11,307 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:11,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 800 transitions, 13327 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:11,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:11,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:11,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:12,562 INFO L129 PetriNetUnfolder]: 787/2756 cut-off events. [2021-12-07 00:00:12,562 INFO L130 PetriNetUnfolder]: For 31701/31701 co-relation queries the response was YES. [2021-12-07 00:00:12,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16515 conditions, 2756 events. 787/2756 cut-off events. For 31701/31701 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 24862 event pairs, 89 based on Foata normal form. 1/2738 useless extension candidates. Maximal degree in co-relation 16429. Up to 1051 conditions per place. [2021-12-07 00:00:12,591 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 354 selfloop transitions, 429 changer transitions 6/831 dead transitions. [2021-12-07 00:00:12,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 831 transitions, 15273 flow [2021-12-07 00:00:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:00:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-07 00:00:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2021-12-07 00:00:12,592 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2021-12-07 00:00:12,593 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2021-12-07 00:00:12,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2021-12-07 00:00:12,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:12,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2021-12-07 00:00:12,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:12,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:12,596 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:12,597 INFO L186 Difference]: Start difference. First operand has 480 places, 800 transitions, 13327 flow. Second operand 27 states and 1503 transitions. [2021-12-07 00:00:12,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 831 transitions, 15273 flow [2021-12-07 00:00:12,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 831 transitions, 14993 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-12-07 00:00:12,810 INFO L242 Difference]: Finished difference. Result has 489 places, 805 transitions, 14380 flow [2021-12-07 00:00:12,810 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=13051, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14380, PETRI_PLACES=489, PETRI_TRANSITIONS=805} [2021-12-07 00:00:12,811 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 410 predicate places. [2021-12-07 00:00:12,811 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 805 transitions, 14380 flow [2021-12-07 00:00:12,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:12,811 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:12,811 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:12,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:00:13,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:00:13,013 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1863812427, now seen corresponding path program 11 times [2021-12-07 00:00:13,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313059056] [2021-12-07 00:00:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:13,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:13,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:13,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313059056] [2021-12-07 00:00:13,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313059056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:13,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963284532] [2021-12-07 00:00:13,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:00:13,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:13,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:13,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:13,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:00:13,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:00:13,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:13,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:14,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963284532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:14,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:14,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:14,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849699968] [2021-12-07 00:00:14,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:14,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:14,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:14,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:14,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 805 transitions, 14380 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:14,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:14,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:14,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:16,205 INFO L129 PetriNetUnfolder]: 843/3028 cut-off events. [2021-12-07 00:00:16,205 INFO L130 PetriNetUnfolder]: For 39026/39026 co-relation queries the response was YES. [2021-12-07 00:00:16,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 3028 events. 843/3028 cut-off events. For 39026/39026 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28185 event pairs, 39 based on Foata normal form. 1/3026 useless extension candidates. Maximal degree in co-relation 18657. Up to 811 conditions per place. [2021-12-07 00:00:16,238 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 366 selfloop transitions, 529 changer transitions 6/943 dead transitions. [2021-12-07 00:00:16,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 943 transitions, 18081 flow [2021-12-07 00:00:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 00:00:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-07 00:00:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2518 transitions. [2021-12-07 00:00:16,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6287141073657928 [2021-12-07 00:00:16,240 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2518 transitions. [2021-12-07 00:00:16,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2518 transitions. [2021-12-07 00:00:16,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:16,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2518 transitions. [2021-12-07 00:00:16,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 55.955555555555556) internal successors, (2518), 45 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:16,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 89.0) internal successors, (4094), 46 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:16,247 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 89.0) internal successors, (4094), 46 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:16,247 INFO L186 Difference]: Start difference. First operand has 489 places, 805 transitions, 14380 flow. Second operand 45 states and 2518 transitions. [2021-12-07 00:00:16,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 943 transitions, 18081 flow [2021-12-07 00:00:16,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 943 transitions, 17664 flow, removed 10 selfloop flow, removed 20 redundant places. [2021-12-07 00:00:16,510 INFO L242 Difference]: Finished difference. Result has 518 places, 858 transitions, 16521 flow [2021-12-07 00:00:16,511 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=13996, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=16521, PETRI_PLACES=518, PETRI_TRANSITIONS=858} [2021-12-07 00:00:16,511 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 439 predicate places. [2021-12-07 00:00:16,511 INFO L470 AbstractCegarLoop]: Abstraction has has 518 places, 858 transitions, 16521 flow [2021-12-07 00:00:16,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:16,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:16,512 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:16,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:00:16,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:00:16,713 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash -372093605, now seen corresponding path program 12 times [2021-12-07 00:00:16,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:16,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39158393] [2021-12-07 00:00:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:16,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:16,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39158393] [2021-12-07 00:00:16,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39158393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607827303] [2021-12-07 00:00:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:00:16,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:16,906 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:16,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:00:16,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-07 00:00:16,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:17,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:17,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607827303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:17,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:17,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798703563] [2021-12-07 00:00:17,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:17,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:17,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:17,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:17,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:17,722 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:17,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 858 transitions, 16521 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:17,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:17,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:17,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:20,807 INFO L129 PetriNetUnfolder]: 912/3306 cut-off events. [2021-12-07 00:00:20,808 INFO L130 PetriNetUnfolder]: For 50461/50461 co-relation queries the response was YES. [2021-12-07 00:00:20,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21361 conditions, 3306 events. 912/3306 cut-off events. For 50461/50461 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31547 event pairs, 38 based on Foata normal form. 1/3304 useless extension candidates. Maximal degree in co-relation 21266. Up to 793 conditions per place. [2021-12-07 00:00:20,843 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 272 selfloop transitions, 700 changer transitions 6/1020 dead transitions. [2021-12-07 00:00:20,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1020 transitions, 20608 flow [2021-12-07 00:00:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-07 00:00:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-07 00:00:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3666 transitions. [2021-12-07 00:00:20,847 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6241062308478039 [2021-12-07 00:00:20,847 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3666 transitions. [2021-12-07 00:00:20,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3666 transitions. [2021-12-07 00:00:20,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:20,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3666 transitions. [2021-12-07 00:00:20,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 55.54545454545455) internal successors, (3666), 66 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:20,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 89.0) internal successors, (5963), 67 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:20,855 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 89.0) internal successors, (5963), 67 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:20,855 INFO L186 Difference]: Start difference. First operand has 518 places, 858 transitions, 16521 flow. Second operand 66 states and 3666 transitions. [2021-12-07 00:00:20,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1020 transitions, 20608 flow [2021-12-07 00:00:21,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1020 transitions, 20343 flow, removed 45 selfloop flow, removed 23 redundant places. [2021-12-07 00:00:21,145 INFO L242 Difference]: Finished difference. Result has 569 places, 935 transitions, 19771 flow [2021-12-07 00:00:21,145 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=16291, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=19771, PETRI_PLACES=569, PETRI_TRANSITIONS=935} [2021-12-07 00:00:21,146 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 490 predicate places. [2021-12-07 00:00:21,146 INFO L470 AbstractCegarLoop]: Abstraction has has 569 places, 935 transitions, 19771 flow [2021-12-07 00:00:21,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:21,146 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:21,146 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:21,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-07 00:00:21,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:21,347 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1472842621, now seen corresponding path program 13 times [2021-12-07 00:00:21,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:21,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540251566] [2021-12-07 00:00:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:21,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:21,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:21,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540251566] [2021-12-07 00:00:21,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540251566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:21,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734963172] [2021-12-07 00:00:21,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:00:21,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:21,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:21,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:21,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:00:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:21,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:21,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:22,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734963172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:22,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:22,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:22,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56043928] [2021-12-07 00:00:22,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:22,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:22,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:22,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:22,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:22,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 935 transitions, 19771 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:22,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:22,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:22,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:26,900 INFO L129 PetriNetUnfolder]: 1027/3774 cut-off events. [2021-12-07 00:00:26,900 INFO L130 PetriNetUnfolder]: For 68863/68863 co-relation queries the response was YES. [2021-12-07 00:00:26,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3774 events. 1027/3774 cut-off events. For 68863/68863 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37584 event pairs, 38 based on Foata normal form. 2/3773 useless extension candidates. Maximal degree in co-relation 26086. Up to 730 conditions per place. [2021-12-07 00:00:26,944 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 270 selfloop transitions, 844 changer transitions 12/1168 dead transitions. [2021-12-07 00:00:26,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1168 transitions, 25976 flow [2021-12-07 00:00:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-07 00:00:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-07 00:00:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5051 transitions. [2021-12-07 00:00:26,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6236572416347698 [2021-12-07 00:00:26,948 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5051 transitions. [2021-12-07 00:00:26,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5051 transitions. [2021-12-07 00:00:26,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:26,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5051 transitions. [2021-12-07 00:00:26,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.505494505494504) internal successors, (5051), 91 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:26,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:26,958 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:26,958 INFO L186 Difference]: Start difference. First operand has 569 places, 935 transitions, 19771 flow. Second operand 91 states and 5051 transitions. [2021-12-07 00:00:26,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1168 transitions, 25976 flow [2021-12-07 00:00:27,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 1168 transitions, 25639 flow, removed 50 selfloop flow, removed 33 redundant places. [2021-12-07 00:00:27,380 INFO L242 Difference]: Finished difference. Result has 637 places, 1058 transitions, 24584 flow [2021-12-07 00:00:27,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=19433, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=24584, PETRI_PLACES=637, PETRI_TRANSITIONS=1058} [2021-12-07 00:00:27,381 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 558 predicate places. [2021-12-07 00:00:27,381 INFO L470 AbstractCegarLoop]: Abstraction has has 637 places, 1058 transitions, 24584 flow [2021-12-07 00:00:27,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:27,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:27,382 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:27,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:00:27,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:27,583 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash 930466101, now seen corresponding path program 14 times [2021-12-07 00:00:27,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:27,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061634209] [2021-12-07 00:00:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:27,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:27,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:27,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061634209] [2021-12-07 00:00:27,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061634209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:27,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301065662] [2021-12-07 00:00:27,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:00:27,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:27,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:27,742 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:27,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:00:27,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:00:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:28,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:28,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301065662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:28,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:28,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:28,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433841630] [2021-12-07 00:00:28,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:28,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:28,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:28,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:28,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:28,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1058 transitions, 24584 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:28,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:28,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:28,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:30,479 INFO L129 PetriNetUnfolder]: 1027/3792 cut-off events. [2021-12-07 00:00:30,479 INFO L130 PetriNetUnfolder]: For 92137/92137 co-relation queries the response was YES. [2021-12-07 00:00:30,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28860 conditions, 3792 events. 1027/3792 cut-off events. For 92137/92137 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 37861 event pairs, 121 based on Foata normal form. 2/3773 useless extension candidates. Maximal degree in co-relation 28746. Up to 1315 conditions per place. [2021-12-07 00:00:30,536 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 443 selfloop transitions, 606 changer transitions 12/1103 dead transitions. [2021-12-07 00:00:30,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 1103 transitions, 27273 flow [2021-12-07 00:00:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 00:00:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-07 00:00:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1820 transitions. [2021-12-07 00:00:30,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6196799455226422 [2021-12-07 00:00:30,562 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1820 transitions. [2021-12-07 00:00:30,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1820 transitions. [2021-12-07 00:00:30,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:30,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1820 transitions. [2021-12-07 00:00:30,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.15151515151515) internal successors, (1820), 33 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:30,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:30,566 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:30,566 INFO L186 Difference]: Start difference. First operand has 637 places, 1058 transitions, 24584 flow. Second operand 33 states and 1820 transitions. [2021-12-07 00:00:30,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 1103 transitions, 27273 flow [2021-12-07 00:00:31,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1103 transitions, 26778 flow, removed 109 selfloop flow, removed 45 redundant places. [2021-12-07 00:00:31,165 INFO L242 Difference]: Finished difference. Result has 629 places, 1071 transitions, 26015 flow [2021-12-07 00:00:31,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=24105, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26015, PETRI_PLACES=629, PETRI_TRANSITIONS=1071} [2021-12-07 00:00:31,166 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 550 predicate places. [2021-12-07 00:00:31,166 INFO L470 AbstractCegarLoop]: Abstraction has has 629 places, 1071 transitions, 26015 flow [2021-12-07 00:00:31,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:31,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:31,167 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:31,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:00:31,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:31,368 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash -486059931, now seen corresponding path program 15 times [2021-12-07 00:00:31,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:31,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104403318] [2021-12-07 00:00:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:31,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:31,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104403318] [2021-12-07 00:00:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104403318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132253617] [2021-12-07 00:00:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:00:31,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:31,550 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:31,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:00:31,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 00:00:31,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:31,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:32,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132253617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:32,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:32,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:32,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552893188] [2021-12-07 00:00:32,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:32,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:32,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:32,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:32,315 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:32,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 1071 transitions, 26015 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:32,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:32,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:32,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:37,736 INFO L129 PetriNetUnfolder]: 1087/4010 cut-off events. [2021-12-07 00:00:37,736 INFO L130 PetriNetUnfolder]: For 103487/103487 co-relation queries the response was YES. [2021-12-07 00:00:37,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31301 conditions, 4010 events. 1087/4010 cut-off events. For 103487/103487 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 40485 event pairs, 56 based on Foata normal form. 1/4008 useless extension candidates. Maximal degree in co-relation 31178. Up to 1071 conditions per place. [2021-12-07 00:00:37,797 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 308 selfloop transitions, 895 changer transitions 6/1251 dead transitions. [2021-12-07 00:00:37,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1251 transitions, 31392 flow [2021-12-07 00:00:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-07 00:00:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-12-07 00:00:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5464 transitions. [2021-12-07 00:00:37,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.62013392350471 [2021-12-07 00:00:37,804 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5464 transitions. [2021-12-07 00:00:37,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5464 transitions. [2021-12-07 00:00:37,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:37,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5464 transitions. [2021-12-07 00:00:37,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 55.19191919191919) internal successors, (5464), 99 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:37,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:37,816 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:37,816 INFO L186 Difference]: Start difference. First operand has 629 places, 1071 transitions, 26015 flow. Second operand 99 states and 5464 transitions. [2021-12-07 00:00:37,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1251 transitions, 31392 flow [2021-12-07 00:00:38,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 1251 transitions, 31141 flow, removed 28 selfloop flow, removed 16 redundant places. [2021-12-07 00:00:38,427 INFO L242 Difference]: Finished difference. Result has 723 places, 1170 transitions, 30288 flow [2021-12-07 00:00:38,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=25806, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=803, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=30288, PETRI_PLACES=723, PETRI_TRANSITIONS=1170} [2021-12-07 00:00:38,429 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 644 predicate places. [2021-12-07 00:00:38,429 INFO L470 AbstractCegarLoop]: Abstraction has has 723 places, 1170 transitions, 30288 flow [2021-12-07 00:00:38,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:38,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:38,429 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:38,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:00:38,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-07 00:00:38,630 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 16 times [2021-12-07 00:00:38,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:38,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455388365] [2021-12-07 00:00:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:38,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:38,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455388365] [2021-12-07 00:00:38,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455388365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224281885] [2021-12-07 00:00:38,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:00:38,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:38,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:38,805 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:38,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:00:38,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:00:38,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:39,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:39,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224281885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:39,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:39,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:39,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136198252] [2021-12-07 00:00:39,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:39,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:39,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:39,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:39,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 1170 transitions, 30288 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:39,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:39,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:39,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:41,669 INFO L129 PetriNetUnfolder]: 1088/3985 cut-off events. [2021-12-07 00:00:41,669 INFO L130 PetriNetUnfolder]: For 136566/136566 co-relation queries the response was YES. [2021-12-07 00:00:41,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33836 conditions, 3985 events. 1088/3985 cut-off events. For 136566/136566 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 40059 event pairs, 123 based on Foata normal form. 1/3963 useless extension candidates. Maximal degree in co-relation 33700. Up to 1406 conditions per place. [2021-12-07 00:00:41,726 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 495 selfloop transitions, 657 changer transitions 6/1200 dead transitions. [2021-12-07 00:00:41,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 1200 transitions, 33072 flow [2021-12-07 00:00:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:00:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-07 00:00:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2021-12-07 00:00:41,728 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6239700374531835 [2021-12-07 00:00:41,728 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2021-12-07 00:00:41,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2021-12-07 00:00:41,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:41,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2021-12-07 00:00:41,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:41,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:41,732 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:41,732 INFO L186 Difference]: Start difference. First operand has 723 places, 1170 transitions, 30288 flow. Second operand 30 states and 1666 transitions. [2021-12-07 00:00:41,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 1200 transitions, 33072 flow [2021-12-07 00:00:42,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 721 places, 1200 transitions, 31590 flow, removed 296 selfloop flow, removed 28 redundant places. [2021-12-07 00:00:42,509 INFO L242 Difference]: Finished difference. Result has 728 places, 1176 transitions, 30816 flow [2021-12-07 00:00:42,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=28822, PETRI_DIFFERENCE_MINUEND_PLACES=692, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=30816, PETRI_PLACES=728, PETRI_TRANSITIONS=1176} [2021-12-07 00:00:42,511 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 649 predicate places. [2021-12-07 00:00:42,511 INFO L470 AbstractCegarLoop]: Abstraction has has 728 places, 1176 transitions, 30816 flow [2021-12-07 00:00:42,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:42,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:42,511 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:42,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:00:42,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:42,713 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1193864843, now seen corresponding path program 17 times [2021-12-07 00:00:42,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:42,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193936620] [2021-12-07 00:00:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:42,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:42,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:42,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193936620] [2021-12-07 00:00:42,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193936620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:42,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218412201] [2021-12-07 00:00:42,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:00:42,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:42,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:42,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:00:42,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:00:42,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:42,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:43,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:43,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218412201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:43,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:43,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:43,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768632171] [2021-12-07 00:00:43,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:43,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:43,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:43,726 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:43,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1176 transitions, 30816 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:43,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:43,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:43,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:46,217 INFO L129 PetriNetUnfolder]: 1088/4040 cut-off events. [2021-12-07 00:00:46,218 INFO L130 PetriNetUnfolder]: For 141891/141891 co-relation queries the response was YES. [2021-12-07 00:00:46,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34193 conditions, 4040 events. 1088/4040 cut-off events. For 141891/141891 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40745 event pairs, 144 based on Foata normal form. 1/4037 useless extension candidates. Maximal degree in co-relation 34052. Up to 1640 conditions per place. [2021-12-07 00:00:46,280 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 470 selfloop transitions, 684 changer transitions 6/1202 dead transitions. [2021-12-07 00:00:46,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 1202 transitions, 33550 flow [2021-12-07 00:00:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 00:00:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-07 00:00:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2021-12-07 00:00:46,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2021-12-07 00:00:46,282 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2021-12-07 00:00:46,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2021-12-07 00:00:46,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:46,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2021-12-07 00:00:46,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:46,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:46,285 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:46,285 INFO L186 Difference]: Start difference. First operand has 728 places, 1176 transitions, 30816 flow. Second operand 33 states and 1827 transitions. [2021-12-07 00:00:46,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 1202 transitions, 33550 flow [2021-12-07 00:00:46,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 1202 transitions, 33017 flow, removed 5 selfloop flow, removed 18 redundant places. [2021-12-07 00:00:46,973 INFO L242 Difference]: Finished difference. Result has 741 places, 1178 transitions, 31789 flow [2021-12-07 00:00:46,974 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=30274, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=31789, PETRI_PLACES=741, PETRI_TRANSITIONS=1178} [2021-12-07 00:00:46,974 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 662 predicate places. [2021-12-07 00:00:46,974 INFO L470 AbstractCegarLoop]: Abstraction has has 741 places, 1178 transitions, 31789 flow [2021-12-07 00:00:46,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:46,975 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:46,975 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:46,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 00:00:47,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:47,176 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:47,177 INFO L85 PathProgramCache]: Analyzing trace with hash -485287381, now seen corresponding path program 18 times [2021-12-07 00:00:47,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487824407] [2021-12-07 00:00:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:47,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:47,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487824407] [2021-12-07 00:00:47,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487824407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207991502] [2021-12-07 00:00:47,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:00:47,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:47,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:47,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:47,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:00:47,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-07 00:00:47,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:47,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:00:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:47,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:48,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207991502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:48,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:48,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-07 00:00:48,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331288132] [2021-12-07 00:00:48,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:48,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:00:48,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:00:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:00:48,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:48,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 1178 transitions, 31789 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:48,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:48,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:48,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:00:52,247 INFO L129 PetriNetUnfolder]: 1256/4441 cut-off events. [2021-12-07 00:00:52,247 INFO L130 PetriNetUnfolder]: For 161164/161164 co-relation queries the response was YES. [2021-12-07 00:00:52,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38500 conditions, 4441 events. 1256/4441 cut-off events. For 161164/161164 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 44903 event pairs, 87 based on Foata normal form. 1/4439 useless extension candidates. Maximal degree in co-relation 38358. Up to 1111 conditions per place. [2021-12-07 00:00:52,312 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 443 selfloop transitions, 918 changer transitions 6/1409 dead transitions. [2021-12-07 00:00:52,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 1409 transitions, 39076 flow [2021-12-07 00:00:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-07 00:00:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-12-07 00:00:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3813 transitions. [2021-12-07 00:00:52,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.630039656311963 [2021-12-07 00:00:52,316 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3813 transitions. [2021-12-07 00:00:52,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3813 transitions. [2021-12-07 00:00:52,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:00:52,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3813 transitions. [2021-12-07 00:00:52,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 56.0735294117647) internal successors, (3813), 68 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:52,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:52,323 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:52,323 INFO L186 Difference]: Start difference. First operand has 741 places, 1178 transitions, 31789 flow. Second operand 68 states and 3813 transitions. [2021-12-07 00:00:52,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 1409 transitions, 39076 flow [2021-12-07 00:00:53,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 1409 transitions, 38610 flow, removed 6 selfloop flow, removed 21 redundant places. [2021-12-07 00:00:53,100 INFO L242 Difference]: Finished difference. Result has 790 places, 1320 transitions, 37865 flow [2021-12-07 00:00:53,101 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31351, PETRI_DIFFERENCE_MINUEND_PLACES=711, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=37865, PETRI_PLACES=790, PETRI_TRANSITIONS=1320} [2021-12-07 00:00:53,102 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 711 predicate places. [2021-12-07 00:00:53,102 INFO L470 AbstractCegarLoop]: Abstraction has has 790 places, 1320 transitions, 37865 flow [2021-12-07 00:00:53,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:53,102 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:00:53,102 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:53,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:00:53,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 00:00:53,303 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:00:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1315777585, now seen corresponding path program 19 times [2021-12-07 00:00:53,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:53,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119763729] [2021-12-07 00:00:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:53,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:53,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119763729] [2021-12-07 00:00:53,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119763729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445665404] [2021-12-07 00:00:53,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:00:53,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:53,523 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:53,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:00:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:00:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:53,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:00:54,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445665404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:54,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:54,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:00:54,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409328887] [2021-12-07 00:00:54,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:54,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:00:54,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:00:54,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:00:54,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:00:54,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 1320 transitions, 37865 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:54,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:00:54,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:00:54,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:01:01,216 INFO L129 PetriNetUnfolder]: 1546/5320 cut-off events. [2021-12-07 00:01:01,216 INFO L130 PetriNetUnfolder]: For 225871/225881 co-relation queries the response was YES. [2021-12-07 00:01:01,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50506 conditions, 5320 events. 1546/5320 cut-off events. For 225871/225881 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 54847 event pairs, 97 based on Foata normal form. 43/5340 useless extension candidates. Maximal degree in co-relation 50352. Up to 730 conditions per place. [2021-12-07 00:01:01,315 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 471 selfloop transitions, 1284 changer transitions 26/1823 dead transitions. [2021-12-07 00:01:01,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 901 places, 1823 transitions, 55998 flow [2021-12-07 00:01:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-12-07 00:01:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-12-07 00:01:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 6584 transitions. [2021-12-07 00:01:01,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6269282041515901 [2021-12-07 00:01:01,321 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 6584 transitions. [2021-12-07 00:01:01,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 6584 transitions. [2021-12-07 00:01:01,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:01:01,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 6584 transitions. [2021-12-07 00:01:01,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 55.79661016949152) internal successors, (6584), 118 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:01,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 89.0) internal successors, (10591), 119 states have internal predecessors, (10591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:01,339 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 89.0) internal successors, (10591), 119 states have internal predecessors, (10591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:01,339 INFO L186 Difference]: Start difference. First operand has 790 places, 1320 transitions, 37865 flow. Second operand 118 states and 6584 transitions. [2021-12-07 00:01:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 901 places, 1823 transitions, 55998 flow [2021-12-07 00:01:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 1823 transitions, 54866 flow, removed 281 selfloop flow, removed 28 redundant places. [2021-12-07 00:01:02,689 INFO L242 Difference]: Finished difference. Result has 908 places, 1658 transitions, 52135 flow [2021-12-07 00:01:02,690 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=37000, PETRI_DIFFERENCE_MINUEND_PLACES=756, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=974, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=52135, PETRI_PLACES=908, PETRI_TRANSITIONS=1658} [2021-12-07 00:01:02,691 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 829 predicate places. [2021-12-07 00:01:02,691 INFO L470 AbstractCegarLoop]: Abstraction has has 908 places, 1658 transitions, 52135 flow [2021-12-07 00:01:02,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:02,691 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:01:02,691 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:02,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:01:02,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:01:02,892 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:01:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:02,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1931960319, now seen corresponding path program 1 times [2021-12-07 00:01:02,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:02,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913554031] [2021-12-07 00:01:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:02,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:03,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913554031] [2021-12-07 00:01:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913554031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:01:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056133050] [2021-12-07 00:01:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:03,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:01:03,072 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:01:03,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:01:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:03,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:01:03,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:01:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:03,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:01:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:03,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056133050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:01:03,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:01:03,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2021-12-07 00:01:03,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460208412] [2021-12-07 00:01:03,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:01:03,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:01:03,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:01:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:01:03,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-12-07 00:01:03,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 1658 transitions, 52135 flow. Second operand has 37 states, 37 states have (on average 52.67567567567568) internal successors, (1949), 37 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:03,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:01:03,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-12-07 00:01:03,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:01:07,936 INFO L129 PetriNetUnfolder]: 1724/5679 cut-off events. [2021-12-07 00:01:07,936 INFO L130 PetriNetUnfolder]: For 335896/335906 co-relation queries the response was YES. [2021-12-07 00:01:08,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58573 conditions, 5679 events. 1724/5679 cut-off events. For 335896/335906 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 58125 event pairs, 264 based on Foata normal form. 7/5661 useless extension candidates. Maximal degree in co-relation 58386. Up to 1381 conditions per place. [2021-12-07 00:01:08,047 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 650 selfloop transitions, 1061 changer transitions 27/1779 dead transitions. [2021-12-07 00:01:08,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 1779 transitions, 57808 flow [2021-12-07 00:01:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 00:01:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-12-07 00:01:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3010 transitions. [2021-12-07 00:01:08,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.626300457761132 [2021-12-07 00:01:08,049 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3010 transitions. [2021-12-07 00:01:08,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3010 transitions. [2021-12-07 00:01:08,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:01:08,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3010 transitions. [2021-12-07 00:01:08,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.74074074074074) internal successors, (3010), 54 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:08,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:08,054 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:08,054 INFO L186 Difference]: Start difference. First operand has 908 places, 1658 transitions, 52135 flow. Second operand 54 states and 3010 transitions. [2021-12-07 00:01:08,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 1779 transitions, 57808 flow [2021-12-07 00:01:10,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 914 places, 1779 transitions, 56079 flow, removed 520 selfloop flow, removed 40 redundant places. [2021-12-07 00:01:10,129 INFO L242 Difference]: Finished difference. Result has 927 places, 1664 transitions, 52904 flow [2021-12-07 00:01:10,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=50494, PETRI_DIFFERENCE_MINUEND_PLACES=861, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=52904, PETRI_PLACES=927, PETRI_TRANSITIONS=1664} [2021-12-07 00:01:10,131 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 848 predicate places. [2021-12-07 00:01:10,131 INFO L470 AbstractCegarLoop]: Abstraction has has 927 places, 1664 transitions, 52904 flow [2021-12-07 00:01:10,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.67567567567568) internal successors, (1949), 37 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:10,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:01:10,131 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:10,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 00:01:10,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 00:01:10,332 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:01:10,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1899468311, now seen corresponding path program 20 times [2021-12-07 00:01:10,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:10,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294753259] [2021-12-07 00:01:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:10,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:10,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:10,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294753259] [2021-12-07 00:01:10,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294753259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:01:10,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423869326] [2021-12-07 00:01:10,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:01:10,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:10,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:01:10,509 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:01:10,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 00:01:10,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:01:10,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:01:10,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:01:10,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:01:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:10,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:01:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423869326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:01:11,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:01:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:01:11,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587384049] [2021-12-07 00:01:11,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:01:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:01:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:01:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:01:11,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:01:11,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 1664 transitions, 52904 flow. Second operand has 46 states, 46 states have (on average 53.630434782608695) internal successors, (2467), 46 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:11,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:01:11,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:01:11,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:01:17,262 INFO L129 PetriNetUnfolder]: 1595/5514 cut-off events. [2021-12-07 00:01:17,262 INFO L130 PetriNetUnfolder]: For 356447/356459 co-relation queries the response was YES. [2021-12-07 00:01:17,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59553 conditions, 5514 events. 1595/5514 cut-off events. For 356447/356459 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 57017 event pairs, 101 based on Foata normal form. 8/5501 useless extension candidates. Maximal degree in co-relation 59363. Up to 686 conditions per place. [2021-12-07 00:01:17,371 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 532 selfloop transitions, 1267 changer transitions 12/1854 dead transitions. [2021-12-07 00:01:17,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 1854 transitions, 61398 flow [2021-12-07 00:01:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-07 00:01:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-07 00:01:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4270 transitions. [2021-12-07 00:01:17,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6312832643406269 [2021-12-07 00:01:17,374 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4270 transitions. [2021-12-07 00:01:17,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4270 transitions. [2021-12-07 00:01:17,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:01:17,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4270 transitions. [2021-12-07 00:01:17,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 56.18421052631579) internal successors, (4270), 76 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:17,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 89.0) internal successors, (6853), 77 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:17,381 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 89.0) internal successors, (6853), 77 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:17,381 INFO L186 Difference]: Start difference. First operand has 927 places, 1664 transitions, 52904 flow. Second operand 76 states and 4270 transitions. [2021-12-07 00:01:17,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 1854 transitions, 61398 flow [2021-12-07 00:01:19,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 956 places, 1854 transitions, 60454 flow, removed 112 selfloop flow, removed 30 redundant places. [2021-12-07 00:01:19,409 INFO L242 Difference]: Finished difference. Result has 974 places, 1708 transitions, 56612 flow [2021-12-07 00:01:19,410 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=52130, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=56612, PETRI_PLACES=974, PETRI_TRANSITIONS=1708} [2021-12-07 00:01:19,411 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 895 predicate places. [2021-12-07 00:01:19,411 INFO L470 AbstractCegarLoop]: Abstraction has has 974 places, 1708 transitions, 56612 flow [2021-12-07 00:01:19,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.630434782608695) internal successors, (2467), 46 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:19,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:01:19,411 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:19,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 00:01:19,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 00:01:19,612 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:01:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash -468486463, now seen corresponding path program 21 times [2021-12-07 00:01:19,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:19,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057230290] [2021-12-07 00:01:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:19,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:19,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:19,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057230290] [2021-12-07 00:01:19,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057230290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:01:19,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774378306] [2021-12-07 00:01:19,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:01:19,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:01:19,820 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:01:19,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 00:01:19,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:01:19,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:01:19,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:01:19,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:01:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:20,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:01:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:20,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774378306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:01:20,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:01:20,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:01:20,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318562728] [2021-12-07 00:01:20,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:01:20,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:01:20,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:01:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:01:20,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:01:20,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 974 places, 1708 transitions, 56612 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:20,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:01:20,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:01:20,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:01:27,360 INFO L129 PetriNetUnfolder]: 1603/5540 cut-off events. [2021-12-07 00:01:27,360 INFO L130 PetriNetUnfolder]: For 381700/381712 co-relation queries the response was YES. [2021-12-07 00:01:27,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61598 conditions, 5540 events. 1603/5540 cut-off events. For 381700/381712 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 57417 event pairs, 103 based on Foata normal form. 8/5525 useless extension candidates. Maximal degree in co-relation 61401. Up to 704 conditions per place. [2021-12-07 00:01:27,470 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 626 selfloop transitions, 1227 changer transitions 12/1908 dead transitions. [2021-12-07 00:01:27,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1060 places, 1908 transitions, 65709 flow [2021-12-07 00:01:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-07 00:01:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-12-07 00:01:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5230 transitions. [2021-12-07 00:01:27,474 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6318714510088196 [2021-12-07 00:01:27,474 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5230 transitions. [2021-12-07 00:01:27,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5230 transitions. [2021-12-07 00:01:27,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:01:27,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5230 transitions. [2021-12-07 00:01:27,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 56.236559139784944) internal successors, (5230), 93 states have internal predecessors, (5230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:27,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 89.0) internal successors, (8366), 94 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:27,482 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 89.0) internal successors, (8366), 94 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:27,482 INFO L186 Difference]: Start difference. First operand has 974 places, 1708 transitions, 56612 flow. Second operand 93 states and 5230 transitions. [2021-12-07 00:01:27,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1060 places, 1908 transitions, 65709 flow [2021-12-07 00:01:29,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1013 places, 1908 transitions, 64139 flow, removed 77 selfloop flow, removed 47 redundant places. [2021-12-07 00:01:29,805 INFO L242 Difference]: Finished difference. Result has 1025 places, 1741 transitions, 59260 flow [2021-12-07 00:01:29,807 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=55133, PETRI_DIFFERENCE_MINUEND_PLACES=921, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=59260, PETRI_PLACES=1025, PETRI_TRANSITIONS=1741} [2021-12-07 00:01:29,808 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 946 predicate places. [2021-12-07 00:01:29,808 INFO L470 AbstractCegarLoop]: Abstraction has has 1025 places, 1741 transitions, 59260 flow [2021-12-07 00:01:29,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:29,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:01:29,808 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:29,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 00:01:30,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 00:01:30,009 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:01:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1687573061, now seen corresponding path program 22 times [2021-12-07 00:01:30,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:30,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508441397] [2021-12-07 00:01:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:30,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:30,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:30,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508441397] [2021-12-07 00:01:30,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508441397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:01:30,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196265353] [2021-12-07 00:01:30,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:01:30,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:01:30,209 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:01:30,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 00:01:30,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:01:30,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:01:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:01:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:01:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:30,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:01:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:31,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196265353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:01:31,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:01:31,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:01:31,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876156786] [2021-12-07 00:01:31,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:01:31,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:01:31,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:01:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:01:31,207 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:01:31,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1025 places, 1741 transitions, 59260 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:31,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:01:31,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:01:31,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:01:38,267 INFO L129 PetriNetUnfolder]: 1782/5934 cut-off events. [2021-12-07 00:01:38,267 INFO L130 PetriNetUnfolder]: For 500571/500581 co-relation queries the response was YES. [2021-12-07 00:01:38,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70846 conditions, 5934 events. 1782/5934 cut-off events. For 500571/500581 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 61472 event pairs, 113 based on Foata normal form. 7/5916 useless extension candidates. Maximal degree in co-relation 70645. Up to 1022 conditions per place. [2021-12-07 00:01:38,398 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 563 selfloop transitions, 1438 changer transitions 12/2056 dead transitions. [2021-12-07 00:01:38,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1125 places, 2056 transitions, 73840 flow [2021-12-07 00:01:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-07 00:01:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-12-07 00:01:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2021-12-07 00:01:38,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2021-12-07 00:01:38,401 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2021-12-07 00:01:38,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2021-12-07 00:01:38,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:01:38,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2021-12-07 00:01:38,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:38,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:38,410 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:38,410 INFO L186 Difference]: Start difference. First operand has 1025 places, 1741 transitions, 59260 flow. Second operand 107 states and 5929 transitions. [2021-12-07 00:01:38,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1125 places, 2056 transitions, 73840 flow [2021-12-07 00:01:41,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1070 places, 2056 transitions, 71651 flow, removed 292 selfloop flow, removed 55 redundant places. [2021-12-07 00:01:41,491 INFO L242 Difference]: Finished difference. Result has 1092 places, 1930 transitions, 68350 flow [2021-12-07 00:01:41,493 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=57318, PETRI_DIFFERENCE_MINUEND_PLACES=964, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=68350, PETRI_PLACES=1092, PETRI_TRANSITIONS=1930} [2021-12-07 00:01:41,493 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1013 predicate places. [2021-12-07 00:01:41,493 INFO L470 AbstractCegarLoop]: Abstraction has has 1092 places, 1930 transitions, 68350 flow [2021-12-07 00:01:41,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:41,494 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:01:41,494 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:41,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 00:01:41,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:41,695 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:01:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -807479533, now seen corresponding path program 23 times [2021-12-07 00:01:41,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:41,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103451651] [2021-12-07 00:01:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:41,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:41,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:41,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103451651] [2021-12-07 00:01:41,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103451651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:01:41,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426881371] [2021-12-07 00:01:41,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:01:41,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:01:41,887 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:01:41,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 00:01:41,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-07 00:01:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:01:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:01:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:01:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:42,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:01:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:42,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426881371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:01:42,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:01:42,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:01:42,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916734431] [2021-12-07 00:01:42,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:01:42,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:01:42,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:01:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:01:42,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:01:42,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1092 places, 1930 transitions, 68350 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:42,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:01:42,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:01:42,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:01:52,961 INFO L129 PetriNetUnfolder]: 1959/6648 cut-off events. [2021-12-07 00:01:52,961 INFO L130 PetriNetUnfolder]: For 586715/586725 co-relation queries the response was YES. [2021-12-07 00:01:53,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81236 conditions, 6648 events. 1959/6648 cut-off events. For 586715/586725 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70401 event pairs, 113 based on Foata normal form. 7/6629 useless extension candidates. Maximal degree in co-relation 81017. Up to 833 conditions per place. [2021-12-07 00:01:53,131 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 592 selfloop transitions, 1672 changer transitions 12/2319 dead transitions. [2021-12-07 00:01:53,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1225 places, 2319 transitions, 86137 flow [2021-12-07 00:01:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-12-07 00:01:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-12-07 00:01:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 7779 transitions. [2021-12-07 00:01:53,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6243178170144462 [2021-12-07 00:01:53,138 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 7779 transitions. [2021-12-07 00:01:53,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 7779 transitions. [2021-12-07 00:01:53,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:01:53,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 7779 transitions. [2021-12-07 00:01:53,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 141 states, 140 states have (on average 55.56428571428572) internal successors, (7779), 140 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:53,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:53,155 INFO L81 ComplementDD]: Finished complementDD. Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:53,155 INFO L186 Difference]: Start difference. First operand has 1092 places, 1930 transitions, 68350 flow. Second operand 140 states and 7779 transitions. [2021-12-07 00:01:53,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1225 places, 2319 transitions, 86137 flow [2021-12-07 00:01:56,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1181 places, 2319 transitions, 81949 flow, removed 168 selfloop flow, removed 44 redundant places. [2021-12-07 00:01:56,761 INFO L242 Difference]: Finished difference. Result has 1207 places, 2140 transitions, 77388 flow [2021-12-07 00:01:56,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=64871, PETRI_DIFFERENCE_MINUEND_PLACES=1042, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=140, PETRI_FLOW=77388, PETRI_PLACES=1207, PETRI_TRANSITIONS=2140} [2021-12-07 00:01:56,763 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1128 predicate places. [2021-12-07 00:01:56,763 INFO L470 AbstractCegarLoop]: Abstraction has has 1207 places, 2140 transitions, 77388 flow [2021-12-07 00:01:56,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:56,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:01:56,763 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:56,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 00:01:56,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:56,964 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:01:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:56,965 INFO L85 PathProgramCache]: Analyzing trace with hash 975847809, now seen corresponding path program 24 times [2021-12-07 00:01:56,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:56,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011700209] [2021-12-07 00:01:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:56,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:57,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011700209] [2021-12-07 00:01:57,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011700209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:01:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846342898] [2021-12-07 00:01:57,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:01:57,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:57,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:01:57,210 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:01:57,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 00:01:57,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-07 00:01:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:01:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:01:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:01:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:57,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:01:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:01:58,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846342898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:01:58,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:01:58,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2021-12-07 00:01:58,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828648201] [2021-12-07 00:01:58,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:01:58,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 00:01:58,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 00:01:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1789, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 00:01:58,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:01:58,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1207 places, 2140 transitions, 77388 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:58,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:01:58,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:01:58,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:02:11,740 INFO L129 PetriNetUnfolder]: 2056/6925 cut-off events. [2021-12-07 00:02:11,741 INFO L130 PetriNetUnfolder]: For 605381/605391 co-relation queries the response was YES. [2021-12-07 00:02:11,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84969 conditions, 6925 events. 2056/6925 cut-off events. For 605381/605391 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 73750 event pairs, 88 based on Foata normal form. 7/6908 useless extension candidates. Maximal degree in co-relation 84734. Up to 872 conditions per place. [2021-12-07 00:02:11,925 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 480 selfloop transitions, 1946 changer transitions 12/2481 dead transitions. [2021-12-07 00:02:11,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1394 places, 2481 transitions, 91751 flow [2021-12-07 00:02:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-12-07 00:02:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-12-07 00:02:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 10749 transitions. [2021-12-07 00:02:11,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225529943241052 [2021-12-07 00:02:11,931 INFO L72 ComplementDD]: Start complementDD. Operand 194 states and 10749 transitions. [2021-12-07 00:02:11,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 194 states and 10749 transitions. [2021-12-07 00:02:11,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:02:11,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 194 states and 10749 transitions. [2021-12-07 00:02:11,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 195 states, 194 states have (on average 55.40721649484536) internal successors, (10749), 194 states have internal predecessors, (10749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:11,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 195 states, 195 states have (on average 89.0) internal successors, (17355), 195 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:11,960 INFO L81 ComplementDD]: Finished complementDD. Result has 195 states, 195 states have (on average 89.0) internal successors, (17355), 195 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:11,960 INFO L186 Difference]: Start difference. First operand has 1207 places, 2140 transitions, 77388 flow. Second operand 194 states and 10749 transitions. [2021-12-07 00:02:11,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1394 places, 2481 transitions, 91751 flow [2021-12-07 00:02:16,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1335 places, 2481 transitions, 89975 flow, removed 358 selfloop flow, removed 59 redundant places. [2021-12-07 00:02:16,667 INFO L242 Difference]: Finished difference. Result has 1359 places, 2292 transitions, 85524 flow [2021-12-07 00:02:16,669 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=75737, PETRI_DIFFERENCE_MINUEND_PLACES=1142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=194, PETRI_FLOW=85524, PETRI_PLACES=1359, PETRI_TRANSITIONS=2292} [2021-12-07 00:02:16,669 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1280 predicate places. [2021-12-07 00:02:16,669 INFO L470 AbstractCegarLoop]: Abstraction has has 1359 places, 2292 transitions, 85524 flow [2021-12-07 00:02:16,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:16,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:02:16,670 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:02:16,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 00:02:16,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-07 00:02:16,871 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:02:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:02:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1312612175, now seen corresponding path program 25 times [2021-12-07 00:02:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:02:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380771404] [2021-12-07 00:02:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:02:16,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:02:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:02:17,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:02:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380771404] [2021-12-07 00:02:17,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380771404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:02:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967164885] [2021-12-07 00:02:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:02:17,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:02:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:02:17,053 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:02:17,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 00:02:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:17,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:02:17,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:02:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:02:17,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:02:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:02:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967164885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:02:18,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:02:18,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:02:18,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625605511] [2021-12-07 00:02:18,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:02:18,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:02:18,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:02:18,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:02:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:02:18,070 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:02:18,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1359 places, 2292 transitions, 85524 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:18,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:02:18,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:02:18,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:02:36,748 INFO L129 PetriNetUnfolder]: 2266/7631 cut-off events. [2021-12-07 00:02:36,749 INFO L130 PetriNetUnfolder]: For 712272/712284 co-relation queries the response was YES. [2021-12-07 00:02:36,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96713 conditions, 7631 events. 2266/7631 cut-off events. For 712272/712284 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 82897 event pairs, 81 based on Foata normal form. 9/7628 useless extension candidates. Maximal degree in co-relation 96466. Up to 958 conditions per place. [2021-12-07 00:02:36,927 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 484 selfloop transitions, 2237 changer transitions 16/2780 dead transitions. [2021-12-07 00:02:36,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1599 places, 2780 transitions, 106018 flow [2021-12-07 00:02:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2021-12-07 00:02:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-12-07 00:02:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 13706 transitions. [2021-12-07 00:02:36,935 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234817813765182 [2021-12-07 00:02:36,935 INFO L72 ComplementDD]: Start complementDD. Operand 247 states and 13706 transitions. [2021-12-07 00:02:36,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 247 states and 13706 transitions. [2021-12-07 00:02:36,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:02:36,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 247 states and 13706 transitions. [2021-12-07 00:02:36,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 248 states, 247 states have (on average 55.48987854251012) internal successors, (13706), 247 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:36,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:36,959 INFO L81 ComplementDD]: Finished complementDD. Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:36,960 INFO L186 Difference]: Start difference. First operand has 1359 places, 2292 transitions, 85524 flow. Second operand 247 states and 13706 transitions. [2021-12-07 00:02:36,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1599 places, 2780 transitions, 106018 flow [2021-12-07 00:02:42,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1496 places, 2780 transitions, 103436 flow, removed 387 selfloop flow, removed 103 redundant places. [2021-12-07 00:02:42,197 INFO L242 Difference]: Finished difference. Result has 1527 places, 2524 transitions, 97886 flow [2021-12-07 00:02:42,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=83144, PETRI_DIFFERENCE_MINUEND_PLACES=1250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=247, PETRI_FLOW=97886, PETRI_PLACES=1527, PETRI_TRANSITIONS=2524} [2021-12-07 00:02:42,199 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1448 predicate places. [2021-12-07 00:02:42,199 INFO L470 AbstractCegarLoop]: Abstraction has has 1527 places, 2524 transitions, 97886 flow [2021-12-07 00:02:42,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:42,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:02:42,200 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:02:42,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-07 00:02:42,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:02:42,401 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:02:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:02:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1971876257, now seen corresponding path program 26 times [2021-12-07 00:02:42,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:02:42,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208659753] [2021-12-07 00:02:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:02:42,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:02:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:02:42,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:02:42,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208659753] [2021-12-07 00:02:42,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208659753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:02:42,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597861136] [2021-12-07 00:02:42,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:02:42,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:02:42,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:02:42,601 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:02:42,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 00:02:42,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:02:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:02:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:02:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:02:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:02:43,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:02:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:02:43,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597861136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:02:43,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:02:43,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:02:43,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020136938] [2021-12-07 00:02:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:02:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:02:43,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:02:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:02:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:02:43,490 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:02:43,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1527 places, 2524 transitions, 97886 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:43,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:02:43,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:02:43,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:02:57,992 INFO L129 PetriNetUnfolder]: 2770/9169 cut-off events. [2021-12-07 00:02:57,992 INFO L130 PetriNetUnfolder]: For 1114095/1114105 co-relation queries the response was YES. [2021-12-07 00:02:58,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127291 conditions, 9169 events. 2770/9169 cut-off events. For 1114095/1114105 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 102181 event pairs, 108 based on Foata normal form. 7/9167 useless extension candidates. Maximal degree in co-relation 127023. Up to 1182 conditions per place. [2021-12-07 00:02:58,236 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 753 selfloop transitions, 2493 changer transitions 12/3301 dead transitions. [2021-12-07 00:02:58,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1688 places, 3301 transitions, 135158 flow [2021-12-07 00:02:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-12-07 00:02:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-12-07 00:02:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2021-12-07 00:02:58,241 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2021-12-07 00:02:58,241 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2021-12-07 00:02:58,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2021-12-07 00:02:58,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:02:58,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2021-12-07 00:02:58,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:58,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:58,256 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:58,256 INFO L186 Difference]: Start difference. First operand has 1527 places, 2524 transitions, 97886 flow. Second operand 168 states and 9368 transitions. [2021-12-07 00:02:58,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1688 places, 3301 transitions, 135158 flow [2021-12-07 00:03:07,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1548 places, 3301 transitions, 132128 flow, removed 581 selfloop flow, removed 140 redundant places. [2021-12-07 00:03:07,362 INFO L242 Difference]: Finished difference. Result has 1585 places, 3075 transitions, 125927 flow [2021-12-07 00:03:07,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=95039, PETRI_DIFFERENCE_MINUEND_PLACES=1381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=125927, PETRI_PLACES=1585, PETRI_TRANSITIONS=3075} [2021-12-07 00:03:07,364 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1506 predicate places. [2021-12-07 00:03:07,364 INFO L470 AbstractCegarLoop]: Abstraction has has 1585 places, 3075 transitions, 125927 flow [2021-12-07 00:03:07,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:07,365 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:03:07,365 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:03:07,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 00:03:07,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-07 00:03:07,566 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:03:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:03:07,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1078550039, now seen corresponding path program 27 times [2021-12-07 00:03:07,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:03:07,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489819539] [2021-12-07 00:03:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:03:07,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:03:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:03:07,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:03:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489819539] [2021-12-07 00:03:07,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489819539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:03:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409691648] [2021-12-07 00:03:07,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:03:07,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:07,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:03:07,762 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:03:07,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 00:03:07,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:03:07,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:03:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:03:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:03:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:03:08,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:03:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:03:08,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409691648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:03:08,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:03:08,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:03:08,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986023749] [2021-12-07 00:03:08,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:03:08,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:03:08,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:03:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:03:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:03:08,754 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:03:08,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1585 places, 3075 transitions, 125927 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:08,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:03:08,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:03:08,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:03:32,793 INFO L129 PetriNetUnfolder]: 2938/9867 cut-off events. [2021-12-07 00:03:32,793 INFO L130 PetriNetUnfolder]: For 1304586/1304596 co-relation queries the response was YES. [2021-12-07 00:03:32,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139885 conditions, 9867 events. 2938/9867 cut-off events. For 1304586/1304596 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 112343 event pairs, 84 based on Foata normal form. 8/9865 useless extension candidates. Maximal degree in co-relation 139593. Up to 1252 conditions per place. [2021-12-07 00:03:33,064 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 582 selfloop transitions, 2912 changer transitions 18/3555 dead transitions. [2021-12-07 00:03:33,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1839 places, 3555 transitions, 148151 flow [2021-12-07 00:03:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2021-12-07 00:03:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2021-12-07 00:03:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 14501 transitions. [2021-12-07 00:03:33,073 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6242627749795514 [2021-12-07 00:03:33,073 INFO L72 ComplementDD]: Start complementDD. Operand 261 states and 14501 transitions. [2021-12-07 00:03:33,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 261 states and 14501 transitions. [2021-12-07 00:03:33,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:03:33,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 261 states and 14501 transitions. [2021-12-07 00:03:33,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 262 states, 261 states have (on average 55.559386973180075) internal successors, (14501), 261 states have internal predecessors, (14501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:33,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 262 states, 262 states have (on average 89.0) internal successors, (23318), 262 states have internal predecessors, (23318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:33,098 INFO L81 ComplementDD]: Finished complementDD. Result has 262 states, 262 states have (on average 89.0) internal successors, (23318), 262 states have internal predecessors, (23318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:33,098 INFO L186 Difference]: Start difference. First operand has 1585 places, 3075 transitions, 125927 flow. Second operand 261 states and 14501 transitions. [2021-12-07 00:03:33,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1839 places, 3555 transitions, 148151 flow [2021-12-07 00:03:43,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1769 places, 3555 transitions, 144725 flow, removed 522 selfloop flow, removed 70 redundant places. [2021-12-07 00:03:43,896 INFO L242 Difference]: Finished difference. Result has 1801 places, 3266 transitions, 138214 flow [2021-12-07 00:03:43,899 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=122866, PETRI_DIFFERENCE_MINUEND_PLACES=1509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2726, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=261, PETRI_FLOW=138214, PETRI_PLACES=1801, PETRI_TRANSITIONS=3266} [2021-12-07 00:03:43,899 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1722 predicate places. [2021-12-07 00:03:43,899 INFO L470 AbstractCegarLoop]: Abstraction has has 1801 places, 3266 transitions, 138214 flow [2021-12-07 00:03:43,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:43,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:03:43,900 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:03:43,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-07 00:03:44,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-07 00:03:44,101 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:03:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:03:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1786914689, now seen corresponding path program 2 times [2021-12-07 00:03:44,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:03:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511040541] [2021-12-07 00:03:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:03:44,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:03:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:03:44,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:03:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511040541] [2021-12-07 00:03:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511040541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:03:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324233865] [2021-12-07 00:03:44,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:03:44,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:03:44,274 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:03:44,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 00:03:44,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:03:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:03:44,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:03:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:03:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:03:44,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:03:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:03:44,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324233865] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:03:44,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:03:44,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2021-12-07 00:03:44,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466950237] [2021-12-07 00:03:44,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:03:44,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:03:44,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:03:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:03:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:03:44,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-12-07 00:03:44,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1801 places, 3266 transitions, 138214 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:44,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:03:44,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-12-07 00:03:44,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:04:03,427 INFO L129 PetriNetUnfolder]: 3974/12292 cut-off events. [2021-12-07 00:04:03,427 INFO L130 PetriNetUnfolder]: For 1971853/1971863 co-relation queries the response was YES. [2021-12-07 00:04:03,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185009 conditions, 12292 events. 3974/12292 cut-off events. For 1971853/1971863 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 140653 event pairs, 316 based on Foata normal form. 82/12333 useless extension candidates. Maximal degree in co-relation 184696. Up to 2981 conditions per place. [2021-12-07 00:04:03,808 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1258 selfloop transitions, 3139 changer transitions 76/4514 dead transitions. [2021-12-07 00:04:03,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1934 places, 4514 transitions, 197631 flow [2021-12-07 00:04:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-07 00:04:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-12-07 00:04:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 7859 transitions. [2021-12-07 00:04:03,813 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6175060894162018 [2021-12-07 00:04:03,813 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 7859 transitions. [2021-12-07 00:04:03,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 7859 transitions. [2021-12-07 00:04:03,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:04:03,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 7859 transitions. [2021-12-07 00:04:03,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 54.95804195804196) internal successors, (7859), 143 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:03,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 89.0) internal successors, (12816), 144 states have internal predecessors, (12816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:03,825 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 89.0) internal successors, (12816), 144 states have internal predecessors, (12816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:03,825 INFO L186 Difference]: Start difference. First operand has 1801 places, 3266 transitions, 138214 flow. Second operand 143 states and 7859 transitions. [2021-12-07 00:04:03,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1934 places, 4514 transitions, 197631 flow [2021-12-07 00:04:22,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1786 places, 4514 transitions, 191811 flow, removed 618 selfloop flow, removed 148 redundant places. [2021-12-07 00:04:22,251 INFO L242 Difference]: Finished difference. Result has 1822 places, 4108 transitions, 181210 flow [2021-12-07 00:04:22,253 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=133495, PETRI_DIFFERENCE_MINUEND_PLACES=1644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=181210, PETRI_PLACES=1822, PETRI_TRANSITIONS=4108} [2021-12-07 00:04:22,254 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1743 predicate places. [2021-12-07 00:04:22,254 INFO L470 AbstractCegarLoop]: Abstraction has has 1822 places, 4108 transitions, 181210 flow [2021-12-07 00:04:22,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:22,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:04:22,254 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:04:22,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-07 00:04:22,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 00:04:22,455 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:04:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:04:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash -643175263, now seen corresponding path program 3 times [2021-12-07 00:04:22,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:04:22,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169569467] [2021-12-07 00:04:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:04:22,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:04:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:04:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:04:22,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:04:22,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169569467] [2021-12-07 00:04:22,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169569467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:04:22,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750354429] [2021-12-07 00:04:22,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:04:22,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:04:22,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:04:22,634 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:04:22,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 00:04:22,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 00:04:22,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:04:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:04:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:04:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:04:22,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:04:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:04:23,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750354429] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:04:23,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:04:23,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2021-12-07 00:04:23,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884950208] [2021-12-07 00:04:23,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:04:23,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:04:23,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:04:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:04:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:04:23,274 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-12-07 00:04:23,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1822 places, 4108 transitions, 181210 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:23,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:04:23,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-12-07 00:04:23,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:04:43,705 INFO L129 PetriNetUnfolder]: 3939/12108 cut-off events. [2021-12-07 00:04:43,705 INFO L130 PetriNetUnfolder]: For 2269991/2270001 co-relation queries the response was YES. [2021-12-07 00:04:43,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 198502 conditions, 12108 events. 3939/12108 cut-off events. For 2269991/2270001 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 137565 event pairs, 535 based on Foata normal form. 13/12071 useless extension candidates. Maximal degree in co-relation 198171. Up to 4718 conditions per place. [2021-12-07 00:04:44,113 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1579 selfloop transitions, 2579 changer transitions 35/4234 dead transitions. [2021-12-07 00:04:44,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1890 places, 4234 transitions, 194030 flow [2021-12-07 00:04:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-07 00:04:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-12-07 00:04:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4518 transitions. [2021-12-07 00:04:44,116 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.619073718827076 [2021-12-07 00:04:44,116 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4518 transitions. [2021-12-07 00:04:44,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4518 transitions. [2021-12-07 00:04:44,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:04:44,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4518 transitions. [2021-12-07 00:04:44,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 55.09756097560975) internal successors, (4518), 82 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:44,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:44,123 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:04:44,123 INFO L186 Difference]: Start difference. First operand has 1822 places, 4108 transitions, 181210 flow. Second operand 82 states and 4518 transitions. [2021-12-07 00:04:44,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1890 places, 4234 transitions, 194030 flow [2021-12-07 00:05:09,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1852 places, 4234 transitions, 189948 flow, removed 856 selfloop flow, removed 38 redundant places. [2021-12-07 00:05:09,364 INFO L242 Difference]: Finished difference. Result has 1867 places, 4116 transitions, 183266 flow [2021-12-07 00:05:09,367 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=177383, PETRI_DIFFERENCE_MINUEND_PLACES=1771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=183266, PETRI_PLACES=1867, PETRI_TRANSITIONS=4116} [2021-12-07 00:05:09,367 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1788 predicate places. [2021-12-07 00:05:09,367 INFO L470 AbstractCegarLoop]: Abstraction has has 1867 places, 4116 transitions, 183266 flow [2021-12-07 00:05:09,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:05:09,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:05:09,368 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:05:09,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-07 00:05:09,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 00:05:09,569 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:05:09,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:05:09,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1920401173, now seen corresponding path program 4 times [2021-12-07 00:05:09,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:05:09,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655988845] [2021-12-07 00:05:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:05:09,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:05:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:05:09,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:05:09,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655988845] [2021-12-07 00:05:09,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655988845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:05:09,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485922853] [2021-12-07 00:05:09,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:05:09,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:05:09,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:05:09,740 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:05:09,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 00:05:09,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:05:09,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:05:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:05:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:05:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:05:10,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:05:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:05:10,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485922853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:05:10,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:05:10,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2021-12-07 00:05:10,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300426624] [2021-12-07 00:05:10,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:05:10,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:05:10,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:05:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:05:10,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:05:10,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-12-07 00:05:10,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1867 places, 4116 transitions, 183266 flow. Second operand has 38 states, 38 states have (on average 52.6578947368421) internal successors, (2001), 38 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:05:10,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:05:10,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-12-07 00:05:10,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:05:29,873 INFO L129 PetriNetUnfolder]: 3923/11960 cut-off events. [2021-12-07 00:05:29,873 INFO L130 PetriNetUnfolder]: For 2118620/2118630 co-relation queries the response was YES. [2021-12-07 00:05:30,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192716 conditions, 11960 events. 3923/11960 cut-off events. For 2118620/2118630 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 134860 event pairs, 486 based on Foata normal form. 14/11927 useless extension candidates. Maximal degree in co-relation 192382. Up to 4726 conditions per place. [2021-12-07 00:05:30,270 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1515 selfloop transitions, 2628 changer transitions 45/4229 dead transitions. [2021-12-07 00:05:30,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1934 places, 4229 transitions, 195518 flow [2021-12-07 00:05:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-07 00:05:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-12-07 00:05:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4631 transitions. [2021-12-07 00:05:30,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6194489031567684 [2021-12-07 00:05:30,273 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4631 transitions. [2021-12-07 00:05:30,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4631 transitions. [2021-12-07 00:05:30,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:05:30,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4631 transitions. [2021-12-07 00:05:30,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 55.13095238095238) internal successors, (4631), 84 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:05:30,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 89.0) internal successors, (7565), 85 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:05:30,280 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 89.0) internal successors, (7565), 85 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:05:30,280 INFO L186 Difference]: Start difference. First operand has 1867 places, 4116 transitions, 183266 flow. Second operand 84 states and 4631 transitions. [2021-12-07 00:05:30,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1934 places, 4229 transitions, 195518 flow [2021-12-07 00:05:50,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1867 places, 4229 transitions, 191703 flow, removed 92 selfloop flow, removed 67 redundant places. [2021-12-07 00:05:50,431 INFO L242 Difference]: Finished difference. Result has 1877 places, 4097 transitions, 184543 flow [2021-12-07 00:05:50,434 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=179593, PETRI_DIFFERENCE_MINUEND_PLACES=1784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=184543, PETRI_PLACES=1877, PETRI_TRANSITIONS=4097} [2021-12-07 00:05:50,434 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1798 predicate places. [2021-12-07 00:05:50,434 INFO L470 AbstractCegarLoop]: Abstraction has has 1877 places, 4097 transitions, 184543 flow [2021-12-07 00:05:50,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.6578947368421) internal successors, (2001), 38 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:05:50,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:05:50,435 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:05:50,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-07 00:05:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-07 00:05:50,636 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:05:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:05:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1263243759, now seen corresponding path program 28 times [2021-12-07 00:05:50,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:05:50,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506771709] [2021-12-07 00:05:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:05:50,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:05:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:05:50,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:05:50,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506771709] [2021-12-07 00:05:50,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506771709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:05:50,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6845595] [2021-12-07 00:05:50,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:05:50,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:05:50,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:05:50,794 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:05:50,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 00:05:50,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:05:50,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:05:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:05:50,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:05:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:05:51,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:05:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:05:51,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6845595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:05:51,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:05:51,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:05:51,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209414931] [2021-12-07 00:05:51,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:05:51,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:05:51,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:05:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:05:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:05:51,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:05:51,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1877 places, 4097 transitions, 184543 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:05:51,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:05:51,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:05:51,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:06:12,250 INFO L129 PetriNetUnfolder]: 3686/11346 cut-off events. [2021-12-07 00:06:12,250 INFO L130 PetriNetUnfolder]: For 2089632/2089758 co-relation queries the response was YES. [2021-12-07 00:06:12,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189750 conditions, 11346 events. 3686/11346 cut-off events. For 2089632/2089758 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 126725 event pairs, 157 based on Foata normal form. 38/11347 useless extension candidates. Maximal degree in co-relation 189419. Up to 2647 conditions per place. [2021-12-07 00:06:12,630 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 1073 selfloop transitions, 3136 changer transitions 12/4287 dead transitions. [2021-12-07 00:06:12,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1983 places, 4287 transitions, 200652 flow [2021-12-07 00:06:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-07 00:06:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-12-07 00:06:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 7423 transitions. [2021-12-07 00:06:12,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6224215998658393 [2021-12-07 00:06:12,634 INFO L72 ComplementDD]: Start complementDD. Operand 134 states and 7423 transitions. [2021-12-07 00:06:12,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 7423 transitions. [2021-12-07 00:06:12,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:06:12,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 134 states and 7423 transitions. [2021-12-07 00:06:12,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 135 states, 134 states have (on average 55.3955223880597) internal successors, (7423), 134 states have internal predecessors, (7423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:12,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 135 states, 135 states have (on average 89.0) internal successors, (12015), 135 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:12,645 INFO L81 ComplementDD]: Finished complementDD. Result has 135 states, 135 states have (on average 89.0) internal successors, (12015), 135 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:12,645 INFO L186 Difference]: Start difference. First operand has 1877 places, 4097 transitions, 184543 flow. Second operand 134 states and 7423 transitions. [2021-12-07 00:06:12,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1983 places, 4287 transitions, 200652 flow [2021-12-07 00:06:33,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1899 places, 4287 transitions, 195784 flow, removed 90 selfloop flow, removed 84 redundant places. [2021-12-07 00:06:33,394 INFO L242 Difference]: Finished difference. Result has 1911 places, 4143 transitions, 190310 flow [2021-12-07 00:06:33,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=179916, PETRI_DIFFERENCE_MINUEND_PLACES=1766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3090, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=190310, PETRI_PLACES=1911, PETRI_TRANSITIONS=4143} [2021-12-07 00:06:33,398 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1832 predicate places. [2021-12-07 00:06:33,398 INFO L470 AbstractCegarLoop]: Abstraction has has 1911 places, 4143 transitions, 190310 flow [2021-12-07 00:06:33,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:33,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:06:33,399 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:06:33,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-07 00:06:33,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:06:33,599 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:06:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:06:33,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1695336415, now seen corresponding path program 29 times [2021-12-07 00:06:33,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:06:33,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230456523] [2021-12-07 00:06:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:06:33,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:06:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:06:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:06:33,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:06:33,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230456523] [2021-12-07 00:06:33,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230456523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:06:33,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108030347] [2021-12-07 00:06:33,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:06:33,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:06:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:06:33,760 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:06:33,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 00:06:33,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-07 00:06:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:06:33,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:06:33,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:06:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:06:34,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:06:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:06:34,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108030347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:06:34,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:06:34,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:06:34,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984504254] [2021-12-07 00:06:34,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:06:34,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:06:34,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:06:34,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:06:34,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:06:34,757 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:06:34,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1911 places, 4143 transitions, 190310 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:34,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:06:34,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:06:34,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:06:55,897 INFO L129 PetriNetUnfolder]: 3685/11330 cut-off events. [2021-12-07 00:06:55,898 INFO L130 PetriNetUnfolder]: For 2094923/2095050 co-relation queries the response was YES. [2021-12-07 00:06:56,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190173 conditions, 11330 events. 3685/11330 cut-off events. For 2094923/2095050 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 126359 event pairs, 246 based on Foata normal form. 40/11289 useless extension candidates. Maximal degree in co-relation 189843. Up to 2649 conditions per place. [2021-12-07 00:06:56,274 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1166 selfloop transitions, 3030 changer transitions 12/4274 dead transitions. [2021-12-07 00:06:56,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2023 places, 4274 transitions, 203694 flow [2021-12-07 00:06:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-07 00:06:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-12-07 00:06:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 6643 transitions. [2021-12-07 00:06:56,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.622003745318352 [2021-12-07 00:06:56,277 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 6643 transitions. [2021-12-07 00:06:56,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 6643 transitions. [2021-12-07 00:06:56,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:06:56,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 6643 transitions. [2021-12-07 00:06:56,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 55.358333333333334) internal successors, (6643), 120 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:56,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 89.0) internal successors, (10769), 121 states have internal predecessors, (10769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:56,287 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 89.0) internal successors, (10769), 121 states have internal predecessors, (10769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:06:56,287 INFO L186 Difference]: Start difference. First operand has 1911 places, 4143 transitions, 190310 flow. Second operand 120 states and 6643 transitions. [2021-12-07 00:06:56,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2023 places, 4274 transitions, 203694 flow [2021-12-07 00:07:17,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1945 places, 4274 transitions, 199896 flow, removed 34 selfloop flow, removed 78 redundant places. [2021-12-07 00:07:17,514 INFO L242 Difference]: Finished difference. Result has 1952 places, 4149 transitions, 194237 flow [2021-12-07 00:07:17,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=186517, PETRI_DIFFERENCE_MINUEND_PLACES=1826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3021, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=194237, PETRI_PLACES=1952, PETRI_TRANSITIONS=4149} [2021-12-07 00:07:17,518 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1873 predicate places. [2021-12-07 00:07:17,518 INFO L470 AbstractCegarLoop]: Abstraction has has 1952 places, 4149 transitions, 194237 flow [2021-12-07 00:07:17,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:17,518 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:07:17,518 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:17,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-07 00:07:17,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 00:07:17,720 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:07:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1707569857, now seen corresponding path program 5 times [2021-12-07 00:07:17,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:17,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318636309] [2021-12-07 00:07:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:17,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:17,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318636309] [2021-12-07 00:07:17,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318636309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256571484] [2021-12-07 00:07:17,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:07:17,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:17,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:17,903 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:17,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 00:07:17,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-07 00:07:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:07:17,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:18,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:18,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256571484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:18,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:18,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2021-12-07 00:07:18,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352937964] [2021-12-07 00:07:18,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:18,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:07:18,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:07:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:07:18,546 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-12-07 00:07:18,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1952 places, 4149 transitions, 194237 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:18,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:07:18,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-12-07 00:07:18,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:07:39,737 INFO L129 PetriNetUnfolder]: 4002/12318 cut-off events. [2021-12-07 00:07:39,737 INFO L130 PetriNetUnfolder]: For 2261610/2261622 co-relation queries the response was YES. [2021-12-07 00:07:40,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202562 conditions, 12318 events. 4002/12318 cut-off events. For 2261610/2261622 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 139749 event pairs, 425 based on Foata normal form. 77/12349 useless extension candidates. Maximal degree in co-relation 202234. Up to 2555 conditions per place. [2021-12-07 00:07:40,222 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 2026 selfloop transitions, 2402 changer transitions 38/4507 dead transitions. [2021-12-07 00:07:40,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2034 places, 4507 transitions, 217287 flow [2021-12-07 00:07:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-07 00:07:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-07 00:07:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5041 transitions. [2021-12-07 00:07:40,224 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6224225212989258 [2021-12-07 00:07:40,224 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5041 transitions. [2021-12-07 00:07:40,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5041 transitions. [2021-12-07 00:07:40,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:07:40,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5041 transitions. [2021-12-07 00:07:40,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.395604395604394) internal successors, (5041), 91 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:40,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:40,232 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:40,232 INFO L186 Difference]: Start difference. First operand has 1952 places, 4149 transitions, 194237 flow. Second operand 91 states and 5041 transitions. [2021-12-07 00:07:40,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2034 places, 4507 transitions, 217287 flow [2021-12-07 00:08:03,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1943 places, 4507 transitions, 211392 flow, removed 41 selfloop flow, removed 91 redundant places. [2021-12-07 00:08:03,883 INFO L242 Difference]: Finished difference. Result has 1964 places, 4240 transitions, 201435 flow [2021-12-07 00:08:03,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=187292, PETRI_DIFFERENCE_MINUEND_PLACES=1853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=201435, PETRI_PLACES=1964, PETRI_TRANSITIONS=4240} [2021-12-07 00:08:03,887 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1885 predicate places. [2021-12-07 00:08:03,887 INFO L470 AbstractCegarLoop]: Abstraction has has 1964 places, 4240 transitions, 201435 flow [2021-12-07 00:08:03,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:03,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:08:03,887 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:03,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-07 00:08:04,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-07 00:08:04,089 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:08:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:04,090 INFO L85 PathProgramCache]: Analyzing trace with hash -438047547, now seen corresponding path program 6 times [2021-12-07 00:08:04,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:04,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909579038] [2021-12-07 00:08:04,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:04,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:04,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909579038] [2021-12-07 00:08:04,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909579038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426585194] [2021-12-07 00:08:04,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:08:04,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:04,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:04,251 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:04,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 00:08:04,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-07 00:08:04,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:08:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:04,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426585194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:05,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:05,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2021-12-07 00:08:05,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061734822] [2021-12-07 00:08:05,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:05,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:08:05,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:08:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:08:05,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-12-07 00:08:05,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1964 places, 4240 transitions, 201435 flow. Second operand has 38 states, 38 states have (on average 52.6578947368421) internal successors, (2001), 38 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:05,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:08:05,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-12-07 00:08:05,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:08:29,911 INFO L129 PetriNetUnfolder]: 4031/12359 cut-off events. [2021-12-07 00:08:29,912 INFO L130 PetriNetUnfolder]: For 2505827/2505837 co-relation queries the response was YES. [2021-12-07 00:08:30,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209457 conditions, 12359 events. 4031/12359 cut-off events. For 2505827/2505837 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 140223 event pairs, 404 based on Foata normal form. 13/12329 useless extension candidates. Maximal degree in co-relation 209119. Up to 2762 conditions per place. [2021-12-07 00:08:30,355 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1228 selfloop transitions, 3426 changer transitions 31/4726 dead transitions. [2021-12-07 00:08:30,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2105 places, 4726 transitions, 226932 flow [2021-12-07 00:08:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-12-07 00:08:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-12-07 00:08:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 8131 transitions. [2021-12-07 00:08:30,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6172942605526875 [2021-12-07 00:08:30,360 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 8131 transitions. [2021-12-07 00:08:30,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 8131 transitions. [2021-12-07 00:08:30,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:08:30,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 8131 transitions. [2021-12-07 00:08:30,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 54.939189189189186) internal successors, (8131), 148 states have internal predecessors, (8131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:30,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 89.0) internal successors, (13261), 149 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:30,373 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 89.0) internal successors, (13261), 149 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:30,373 INFO L186 Difference]: Start difference. First operand has 1964 places, 4240 transitions, 201435 flow. Second operand 148 states and 8131 transitions. [2021-12-07 00:08:30,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2105 places, 4726 transitions, 226932 flow [2021-12-07 00:08:58,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2041 places, 4726 transitions, 224065 flow, removed 575 selfloop flow, removed 64 redundant places. [2021-12-07 00:08:58,187 INFO L242 Difference]: Finished difference. Result has 2055 places, 4376 transitions, 213409 flow [2021-12-07 00:08:58,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=198802, PETRI_DIFFERENCE_MINUEND_PLACES=1894, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=148, PETRI_FLOW=213409, PETRI_PLACES=2055, PETRI_TRANSITIONS=4376} [2021-12-07 00:08:58,191 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1976 predicate places. [2021-12-07 00:08:58,191 INFO L470 AbstractCegarLoop]: Abstraction has has 2055 places, 4376 transitions, 213409 flow [2021-12-07 00:08:58,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.6578947368421) internal successors, (2001), 38 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:58,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:08:58,191 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:58,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-07 00:08:58,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:58,392 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:08:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:58,393 INFO L85 PathProgramCache]: Analyzing trace with hash 156573805, now seen corresponding path program 30 times [2021-12-07 00:08:58,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:58,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121328391] [2021-12-07 00:08:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:58,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:58,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121328391] [2021-12-07 00:08:58,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121328391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35232756] [2021-12-07 00:08:58,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:08:58,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:58,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:58,581 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:58,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 00:08:58,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-07 00:08:58,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:08:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:59,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:59,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35232756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:59,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:59,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:08:59,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764706184] [2021-12-07 00:08:59,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:59,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:08:59,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:08:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:08:59,535 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:08:59,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2055 places, 4376 transitions, 213409 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:59,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:08:59,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:08:59,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:09:23,466 INFO L129 PetriNetUnfolder]: 4209/12982 cut-off events. [2021-12-07 00:09:23,466 INFO L130 PetriNetUnfolder]: For 2818154/2818390 co-relation queries the response was YES. [2021-12-07 00:09:23,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230708 conditions, 12982 events. 4209/12982 cut-off events. For 2818154/2818390 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 148904 event pairs, 316 based on Foata normal form. 46/12950 useless extension candidates. Maximal degree in co-relation 230366. Up to 3718 conditions per place. [2021-12-07 00:09:24,043 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1644 selfloop transitions, 3324 changer transitions 12/5050 dead transitions. [2021-12-07 00:09:24,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2126 places, 5050 transitions, 255680 flow [2021-12-07 00:09:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-07 00:09:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-12-07 00:09:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4929 transitions. [2021-12-07 00:09:24,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6222699154147203 [2021-12-07 00:09:24,045 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4929 transitions. [2021-12-07 00:09:24,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4929 transitions. [2021-12-07 00:09:24,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:09:24,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4929 transitions. [2021-12-07 00:09:24,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 55.38202247191011) internal successors, (4929), 89 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:24,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 89.0) internal successors, (8010), 90 states have internal predecessors, (8010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:24,053 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 89.0) internal successors, (8010), 90 states have internal predecessors, (8010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:24,053 INFO L186 Difference]: Start difference. First operand has 2055 places, 4376 transitions, 213409 flow. Second operand 89 states and 4929 transitions. [2021-12-07 00:09:24,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2126 places, 5050 transitions, 255680 flow [2021-12-07 00:09:56,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2027 places, 5050 transitions, 249155 flow, removed 1382 selfloop flow, removed 99 redundant places. [2021-12-07 00:09:56,706 INFO L242 Difference]: Finished difference. Result has 2051 places, 4874 transitions, 243810 flow [2021-12-07 00:09:56,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209006, PETRI_DIFFERENCE_MINUEND_PLACES=1939, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=243810, PETRI_PLACES=2051, PETRI_TRANSITIONS=4874} [2021-12-07 00:09:56,710 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1972 predicate places. [2021-12-07 00:09:56,710 INFO L470 AbstractCegarLoop]: Abstraction has has 2051 places, 4874 transitions, 243810 flow [2021-12-07 00:09:56,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:56,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:09:56,710 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:09:56,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-07 00:09:56,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:56,911 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:09:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:09:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1401017229, now seen corresponding path program 7 times [2021-12-07 00:09:56,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:09:56,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177694428] [2021-12-07 00:09:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:09:56,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:09:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:57,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:09:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177694428] [2021-12-07 00:09:57,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177694428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:09:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626250586] [2021-12-07 00:09:57,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:09:57,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:09:57,141 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:09:57,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 00:09:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:09:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:09:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:57,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:09:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:57,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626250586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:09:57,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:09:57,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2021-12-07 00:09:57,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966830882] [2021-12-07 00:09:57,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:09:57,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:09:57,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:09:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:09:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:09:57,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-12-07 00:09:57,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2051 places, 4874 transitions, 243810 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:57,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:09:57,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-12-07 00:09:57,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:10:29,166 INFO L129 PetriNetUnfolder]: 4608/13842 cut-off events. [2021-12-07 00:10:29,166 INFO L130 PetriNetUnfolder]: For 2426665/2426675 co-relation queries the response was YES. [2021-12-07 00:10:29,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232674 conditions, 13842 events. 4608/13842 cut-off events. For 2426665/2426675 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 158780 event pairs, 780 based on Foata normal form. 7/13784 useless extension candidates. Maximal degree in co-relation 232321. Up to 6522 conditions per place. [2021-12-07 00:10:29,678 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 2028 selfloop transitions, 3069 changer transitions 21/5159 dead transitions. [2021-12-07 00:10:29,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2136 places, 5159 transitions, 264878 flow [2021-12-07 00:10:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-07 00:10:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-12-07 00:10:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5034 transitions. [2021-12-07 00:10:29,681 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6148021494870543 [2021-12-07 00:10:29,681 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5034 transitions. [2021-12-07 00:10:29,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5034 transitions. [2021-12-07 00:10:29,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:10:29,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5034 transitions. [2021-12-07 00:10:29,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 54.71739130434783) internal successors, (5034), 92 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:29,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 89.0) internal successors, (8277), 93 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:29,689 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 89.0) internal successors, (8277), 93 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:29,689 INFO L186 Difference]: Start difference. First operand has 2051 places, 4874 transitions, 243810 flow. Second operand 92 states and 5034 transitions. [2021-12-07 00:10:29,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2136 places, 5159 transitions, 264878 flow [2021-12-07 00:11:01,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2112 places, 5159 transitions, 263986 flow, removed 88 selfloop flow, removed 24 redundant places. [2021-12-07 00:11:01,935 INFO L242 Difference]: Finished difference. Result has 2141 places, 5040 transitions, 259666 flow [2021-12-07 00:11:01,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=242952, PETRI_DIFFERENCE_MINUEND_PLACES=2021, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2911, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=259666, PETRI_PLACES=2141, PETRI_TRANSITIONS=5040} [2021-12-07 00:11:01,937 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2062 predicate places. [2021-12-07 00:11:01,938 INFO L470 AbstractCegarLoop]: Abstraction has has 2141 places, 5040 transitions, 259666 flow [2021-12-07 00:11:01,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:01,938 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:11:01,938 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:01,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-07 00:11:02,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-07 00:11:02,139 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:11:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash 727008757, now seen corresponding path program 31 times [2021-12-07 00:11:02,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:02,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126473634] [2021-12-07 00:11:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:02,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:02,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:02,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126473634] [2021-12-07 00:11:02,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126473634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:02,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416978498] [2021-12-07 00:11:02,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:11:02,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:02,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:02,290 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:02,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 00:11:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:02,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:11:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:02,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:11:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:03,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416978498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:11:03,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:11:03,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:11:03,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620042106] [2021-12-07 00:11:03,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:11:03,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:11:03,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:11:03,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:11:03,296 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:11:03,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2141 places, 5040 transitions, 259666 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:03,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:11:03,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:11:03,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:11:35,048 INFO L129 PetriNetUnfolder]: 4569/13891 cut-off events. [2021-12-07 00:11:35,048 INFO L130 PetriNetUnfolder]: For 2736856/2737151 co-relation queries the response was YES. [2021-12-07 00:11:35,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252529 conditions, 13891 events. 4569/13891 cut-off events. For 2736856/2737151 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 160136 event pairs, 313 based on Foata normal form. 94/13913 useless extension candidates. Maximal degree in co-relation 252154. Up to 3821 conditions per place. [2021-12-07 00:11:35,682 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1571 selfloop transitions, 3877 changer transitions 12/5548 dead transitions. [2021-12-07 00:11:35,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2269 places, 5548 transitions, 294716 flow [2021-12-07 00:11:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-07 00:11:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-12-07 00:11:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 7660 transitions. [2021-12-07 00:11:35,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6191900412254466 [2021-12-07 00:11:35,686 INFO L72 ComplementDD]: Start complementDD. Operand 139 states and 7660 transitions. [2021-12-07 00:11:35,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 7660 transitions. [2021-12-07 00:11:35,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:11:35,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 139 states and 7660 transitions. [2021-12-07 00:11:35,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 140 states, 139 states have (on average 55.10791366906475) internal successors, (7660), 139 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:35,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 140 states, 140 states have (on average 89.0) internal successors, (12460), 140 states have internal predecessors, (12460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:35,698 INFO L81 ComplementDD]: Finished complementDD. Result has 140 states, 140 states have (on average 89.0) internal successors, (12460), 140 states have internal predecessors, (12460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:35,698 INFO L186 Difference]: Start difference. First operand has 2141 places, 5040 transitions, 259666 flow. Second operand 139 states and 7660 transitions. [2021-12-07 00:11:35,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2269 places, 5548 transitions, 294716 flow [2021-12-07 00:12:18,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2231 places, 5548 transitions, 293045 flow, removed 227 selfloop flow, removed 38 redundant places. [2021-12-07 00:12:18,799 INFO L242 Difference]: Finished difference. Result has 2257 places, 5367 transitions, 288246 flow [2021-12-07 00:12:18,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=258162, PETRI_DIFFERENCE_MINUEND_PLACES=2093, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=288246, PETRI_PLACES=2257, PETRI_TRANSITIONS=5367} [2021-12-07 00:12:18,802 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2178 predicate places. [2021-12-07 00:12:18,802 INFO L470 AbstractCegarLoop]: Abstraction has has 2257 places, 5367 transitions, 288246 flow [2021-12-07 00:12:18,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:18,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:18,803 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:18,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 00:12:19,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:19,004 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash 436000257, now seen corresponding path program 32 times [2021-12-07 00:12:19,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:19,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668391854] [2021-12-07 00:12:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:19,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:19,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668391854] [2021-12-07 00:12:19,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668391854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29184154] [2021-12-07 00:12:19,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:12:19,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:19,174 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1551497-cac5-4203-a422-eee3630e9730/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 00:12:19,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:12:19,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:19,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:12:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:19,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:20,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29184154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:20,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:20,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-12-07 00:12:20,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339301130] [2021-12-07 00:12:20,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:20,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:12:20,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:12:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:12:20,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-07 00:12:20,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2257 places, 5367 transitions, 288246 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:20,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:20,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-07 00:12:20,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand