./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN --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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:04:59,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:04:59,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:04:59,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:04:59,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:04:59,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:04:59,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:04:59,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:04:59,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:04:59,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:04:59,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:04:59,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:04:59,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:04:59,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:04:59,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:04:59,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:04:59,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:04:59,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:04:59,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:04:59,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:04:59,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:04:59,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:04:59,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:04:59,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:04:59,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:04:59,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:04:59,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:04:59,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:04:59,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:04:59,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:04:59,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:04:59,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:04:59,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:04:59,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:04:59,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:04:59,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:04:59,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:04:59,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:04:59,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:04:59,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:04:59,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:04:59,844 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:04:59,868 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:04:59,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:04:59,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:04:59,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:04:59,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:04:59,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:04:59,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:04:59,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:04:59,871 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:04:59,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:04:59,872 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:04:59,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:04:59,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:04:59,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:04:59,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:04:59,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:04:59,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:04:59,874 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:04:59,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:04:59,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:04:59,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:04:59,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:04:59,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:04:59,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:04:59,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:59,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:04:59,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:04:59,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:04:59,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:04:59,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:04:59,877 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:04:59,877 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:04:59,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:04:59,878 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_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2022-11-20 11:05:00,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:05:00,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:05:00,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:05:00,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:05:00,154 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:05:00,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-11-20 11:05:03,225 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:05:03,557 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:05:03,557 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-11-20 11:05:03,575 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/data/8e5a18d42/c180456e9ef14149917720eab80b0435/FLAGb0311e5af [2022-11-20 11:05:03,592 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/data/8e5a18d42/c180456e9ef14149917720eab80b0435 [2022-11-20 11:05:03,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:05:03,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:05:03,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:05:03,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:05:03,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:05:03,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:05:03" (1/1) ... [2022-11-20 11:05:03,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5ab528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:03, skipping insertion in model container [2022-11-20 11:05:03,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:05:03" (1/1) ... [2022-11-20 11:05:03,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:05:03,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:05:04,357 WARN L237 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_1b0264c7-59e4-4d6f-8839-aa657f174e67/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-11-20 11:05:04,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:05:04,429 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:05:04,491 WARN L237 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_1b0264c7-59e4-4d6f-8839-aa657f174e67/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-11-20 11:05:04,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:05:04,602 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:05:04,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04 WrapperNode [2022-11-20 11:05:04,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:05:04,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:05:04,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:05:04,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:05:04,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,686 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-11-20 11:05:04,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:05:04,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:05:04,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:05:04,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:05:04,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,746 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:05:04,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:05:04,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:05:04,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:05:04,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (1/1) ... [2022-11-20 11:05:04,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:05:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:04,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:05:04,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:05:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:05:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:05:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:05:04,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:05:04,838 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:05:04,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:05:04,839 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 11:05:04,839 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 11:05:04,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:05:04,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:05:04,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:05:04,844 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:05:04,982 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:05:04,984 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:05:05,356 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:05:05,370 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:05:05,383 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-20 11:05:05,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:05:05 BoogieIcfgContainer [2022-11-20 11:05:05,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:05:05,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:05:05,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:05:05,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:05:05,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:05:03" (1/3) ... [2022-11-20 11:05:05,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff6b40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:05:05, skipping insertion in model container [2022-11-20 11:05:05,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:04" (2/3) ... [2022-11-20 11:05:05,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff6b40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:05:05, skipping insertion in model container [2022-11-20 11:05:05,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:05:05" (3/3) ... [2022-11-20 11:05:05,400 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2022-11-20 11:05:05,409 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:05:05,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:05:05,421 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 11:05:05,421 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:05:05,569 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:05:05,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 408 flow [2022-11-20 11:05:05,745 INFO L130 PetriNetUnfolder]: 45/272 cut-off events. [2022-11-20 11:05:05,745 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-20 11:05:05,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 272 events. 45/272 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 844 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-11-20 11:05:05,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 408 flow [2022-11-20 11:05:05,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 395 flow [2022-11-20 11:05:05,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:05,796 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d8dd301, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:05,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 11:05:05,848 INFO L130 PetriNetUnfolder]: 14/132 cut-off events. [2022-11-20 11:05:05,848 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:05:05,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:05,849 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:05,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:05:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1921288591, now seen corresponding path program 1 times [2022-11-20 11:05:05,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:05,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127355033] [2022-11-20 11:05:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:05,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:06,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127355033] [2022-11-20 11:05:06,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127355033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:06,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:06,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:05:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484535563] [2022-11-20 11:05:06,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:06,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:05:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:06,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:05:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:05:06,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 200 [2022-11-20 11:05:06,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 395 flow. Second operand has 2 states, 2 states have (on average 170.0) internal successors, (340), 2 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:06,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 200 [2022-11-20 11:05:06,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:06,200 INFO L130 PetriNetUnfolder]: 4/224 cut-off events. [2022-11-20 11:05:06,201 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:05:06,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 224 events. 4/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 626 event pairs, 0 based on Foata normal form. 40/251 useless extension candidates. Maximal degree in co-relation 125. Up to 4 conditions per place. [2022-11-20 11:05:06,205 INFO L137 encePairwiseOnDemand]: 173/200 looper letters, 1 selfloop transitions, 0 changer transitions 1/166 dead transitions. [2022-11-20 11:05:06,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 166 transitions, 339 flow [2022-11-20 11:05:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:05:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:05:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 366 transitions. [2022-11-20 11:05:06,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.915 [2022-11-20 11:05:06,221 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 366 transitions. [2022-11-20 11:05:06,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 366 transitions. [2022-11-20 11:05:06,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:06,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 366 transitions. [2022-11-20 11:05:06,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 183.0) internal successors, (366), 2 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,237 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,239 INFO L175 Difference]: Start difference. First operand has 168 places, 195 transitions, 395 flow. Second operand 2 states and 366 transitions. [2022-11-20 11:05:06,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 166 transitions, 339 flow [2022-11-20 11:05:06,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 166 transitions, 339 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:05:06,248 INFO L231 Difference]: Finished difference. Result has 167 places, 165 transitions, 335 flow [2022-11-20 11:05:06,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=335, PETRI_PLACES=167, PETRI_TRANSITIONS=165} [2022-11-20 11:05:06,253 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, -1 predicate places. [2022-11-20 11:05:06,254 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 165 transitions, 335 flow [2022-11-20 11:05:06,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 170.0) internal successors, (340), 2 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:06,255 INFO L209 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] [2022-11-20 11:05:06,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:05:06,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:05:06,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1211694797, now seen corresponding path program 1 times [2022-11-20 11:05:06,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:06,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244018341] [2022-11-20 11:05:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:06,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:06,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244018341] [2022-11-20 11:05:06,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244018341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:06,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:06,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545364161] [2022-11-20 11:05:06,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:06,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:06,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:06,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 200 [2022-11-20 11:05:06,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 165 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:06,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 200 [2022-11-20 11:05:06,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:06,504 INFO L130 PetriNetUnfolder]: 4/227 cut-off events. [2022-11-20 11:05:06,505 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:05:06,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 227 events. 4/227 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 623 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 242. Up to 9 conditions per place. [2022-11-20 11:05:06,507 INFO L137 encePairwiseOnDemand]: 197/200 looper letters, 10 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-11-20 11:05:06,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 169 transitions, 367 flow [2022-11-20 11:05:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2022-11-20 11:05:06,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8316666666666667 [2022-11-20 11:05:06,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2022-11-20 11:05:06,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2022-11-20 11:05:06,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:06,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2022-11-20 11:05:06,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,517 INFO L175 Difference]: Start difference. First operand has 167 places, 165 transitions, 335 flow. Second operand 3 states and 499 transitions. [2022-11-20 11:05:06,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 169 transitions, 367 flow [2022-11-20 11:05:06,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 367 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:05:06,522 INFO L231 Difference]: Finished difference. Result has 169 places, 166 transitions, 347 flow [2022-11-20 11:05:06,523 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=169, PETRI_TRANSITIONS=166} [2022-11-20 11:05:06,523 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, 1 predicate places. [2022-11-20 11:05:06,524 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 166 transitions, 347 flow [2022-11-20 11:05:06,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:06,525 INFO L209 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] [2022-11-20 11:05:06,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:05:06,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:05:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1970782420, now seen corresponding path program 1 times [2022-11-20 11:05:06,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:06,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483488482] [2022-11-20 11:05:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:06,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:06,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483488482] [2022-11-20 11:05:06,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483488482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:06,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331697301] [2022-11-20 11:05:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:06,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:06,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:06,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:06,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:05:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:06,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:05:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:06,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:06,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331697301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:06,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:06,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:05:06,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256761102] [2022-11-20 11:05:06,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:06,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:06,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:06,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 200 [2022-11-20 11:05:06,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 166 transitions, 347 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:06,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:06,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 200 [2022-11-20 11:05:06,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:06,992 INFO L130 PetriNetUnfolder]: 3/173 cut-off events. [2022-11-20 11:05:06,992 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:05:06,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 173 events. 3/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 317 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 191. Up to 6 conditions per place. [2022-11-20 11:05:06,995 INFO L137 encePairwiseOnDemand]: 197/200 looper letters, 8 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-11-20 11:05:06,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 168 transitions, 371 flow [2022-11-20 11:05:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-11-20 11:05:06,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8283333333333334 [2022-11-20 11:05:06,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-11-20 11:05:06,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-11-20 11:05:06,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:07,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-11-20 11:05:07,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,004 INFO L175 Difference]: Start difference. First operand has 169 places, 166 transitions, 347 flow. Second operand 3 states and 497 transitions. [2022-11-20 11:05:07,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 168 transitions, 371 flow [2022-11-20 11:05:07,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 168 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:07,009 INFO L231 Difference]: Finished difference. Result has 171 places, 166 transitions, 353 flow [2022-11-20 11:05:07,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=353, PETRI_PLACES=171, PETRI_TRANSITIONS=166} [2022-11-20 11:05:07,010 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, 3 predicate places. [2022-11-20 11:05:07,010 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 166 transitions, 353 flow [2022-11-20 11:05:07,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:07,012 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:07,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:07,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:07,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:05:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1718762197, now seen corresponding path program 1 times [2022-11-20 11:05:07,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:07,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947221725] [2022-11-20 11:05:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:07,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:07,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947221725] [2022-11-20 11:05:07,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947221725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050169739] [2022-11-20 11:05:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:07,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:07,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:07,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:07,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:05:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:05:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:07,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:07,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050169739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:07,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:07,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:05:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390539660] [2022-11-20 11:05:07,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:07,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-11-20 11:05:07,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 166 transitions, 353 flow. Second operand has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:07,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-11-20 11:05:07,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:07,748 INFO L130 PetriNetUnfolder]: 3/180 cut-off events. [2022-11-20 11:05:07,748 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:05:07,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 180 events. 3/180 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 312 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 212. Up to 6 conditions per place. [2022-11-20 11:05:07,751 INFO L137 encePairwiseOnDemand]: 194/200 looper letters, 11 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-11-20 11:05:07,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 176 transitions, 415 flow [2022-11-20 11:05:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:05:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1471 transitions. [2022-11-20 11:05:07,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8172222222222222 [2022-11-20 11:05:07,756 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1471 transitions. [2022-11-20 11:05:07,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1471 transitions. [2022-11-20 11:05:07,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:07,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1471 transitions. [2022-11-20 11:05:07,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 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) [2022-11-20 11:05:07,766 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 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) [2022-11-20 11:05:07,766 INFO L175 Difference]: Start difference. First operand has 171 places, 166 transitions, 353 flow. Second operand 9 states and 1471 transitions. [2022-11-20 11:05:07,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 176 transitions, 415 flow [2022-11-20 11:05:07,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 176 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:05:07,771 INFO L231 Difference]: Finished difference. Result has 180 places, 172 transitions, 399 flow [2022-11-20 11:05:07,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=399, PETRI_PLACES=180, PETRI_TRANSITIONS=172} [2022-11-20 11:05:07,773 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, 12 predicate places. [2022-11-20 11:05:07,773 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 172 transitions, 399 flow [2022-11-20 11:05:07,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:07,775 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-20 11:05:07,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:07,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:07,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:05:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2122069387, now seen corresponding path program 2 times [2022-11-20 11:05:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:07,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916991294] [2022-11-20 11:05:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:08,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916991294] [2022-11-20 11:05:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916991294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:08,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239672236] [2022-11-20 11:05:08,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:08,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:08,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:08,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:05:08,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:05:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:05:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:08,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:08,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239672236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:08,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:08,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:05:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827849040] [2022-11-20 11:05:08,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:08,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:05:08,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:05:08,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:05:08,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-11-20 11:05:08,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 172 transitions, 399 flow. Second operand has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:08,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-11-20 11:05:08,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:08,771 INFO L130 PetriNetUnfolder]: 3/200 cut-off events. [2022-11-20 11:05:08,771 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-20 11:05:08,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 200 events. 3/200 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 312 event pairs, 0 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 298. Up to 11 conditions per place. [2022-11-20 11:05:08,773 INFO L137 encePairwiseOnDemand]: 194/200 looper letters, 19 selfloop transitions, 21 changer transitions 0/196 dead transitions. [2022-11-20 11:05:08,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 196 transitions, 587 flow [2022-11-20 11:05:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:05:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:05:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3425 transitions. [2022-11-20 11:05:08,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154761904761905 [2022-11-20 11:05:08,782 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3425 transitions. [2022-11-20 11:05:08,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3425 transitions. [2022-11-20 11:05:08,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:08,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3425 transitions. [2022-11-20 11:05:08,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 163.0952380952381) internal successors, (3425), 21 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,800 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,801 INFO L175 Difference]: Start difference. First operand has 180 places, 172 transitions, 399 flow. Second operand 21 states and 3425 transitions. [2022-11-20 11:05:08,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 196 transitions, 587 flow [2022-11-20 11:05:08,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 196 transitions, 573 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:08,807 INFO L231 Difference]: Finished difference. Result has 204 places, 185 transitions, 523 flow [2022-11-20 11:05:08,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=523, PETRI_PLACES=204, PETRI_TRANSITIONS=185} [2022-11-20 11:05:08,808 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, 36 predicate places. [2022-11-20 11:05:08,808 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 185 transitions, 523 flow [2022-11-20 11:05:08,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:08,810 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-11-20 11:05:08,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:09,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:09,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:05:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1016344139, now seen corresponding path program 3 times [2022-11-20 11:05:09,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:09,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249935584] [2022-11-20 11:05:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:09,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:09,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:09,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249935584] [2022-11-20 11:05:09,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249935584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:09,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334208341] [2022-11-20 11:05:09,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:05:09,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:09,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:09,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:09,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:05:09,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 11:05:09,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:09,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:09,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:09,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:05:10,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334208341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:10,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:10,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 11:05:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061289387] [2022-11-20 11:05:10,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:10,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:05:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:10,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:05:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:05:10,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-11-20 11:05:10,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 185 transitions, 523 flow. Second operand has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:10,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-11-20 11:05:10,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:10,436 INFO L130 PetriNetUnfolder]: 3/215 cut-off events. [2022-11-20 11:05:10,436 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 11:05:10,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 215 events. 3/215 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 312 event pairs, 0 based on Foata normal form. 3/212 useless extension candidates. Maximal degree in co-relation 394. Up to 17 conditions per place. [2022-11-20 11:05:10,439 INFO L137 encePairwiseOnDemand]: 194/200 looper letters, 25 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2022-11-20 11:05:10,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 211 transitions, 779 flow [2022-11-20 11:05:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:05:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:05:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4888 transitions. [2022-11-20 11:05:10,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8146666666666667 [2022-11-20 11:05:10,449 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4888 transitions. [2022-11-20 11:05:10,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4888 transitions. [2022-11-20 11:05:10,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:10,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4888 transitions. [2022-11-20 11:05:10,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 162.93333333333334) internal successors, (4888), 30 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,480 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,480 INFO L175 Difference]: Start difference. First operand has 204 places, 185 transitions, 523 flow. Second operand 30 states and 4888 transitions. [2022-11-20 11:05:10,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 211 transitions, 779 flow [2022-11-20 11:05:10,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 211 transitions, 749 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-20 11:05:10,491 INFO L231 Difference]: Finished difference. Result has 231 places, 195 transitions, 651 flow [2022-11-20 11:05:10,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=651, PETRI_PLACES=231, PETRI_TRANSITIONS=195} [2022-11-20 11:05:10,494 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, 63 predicate places. [2022-11-20 11:05:10,494 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 195 transitions, 651 flow [2022-11-20 11:05:10,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:10,496 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-11-20 11:05:10,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:10,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:05:10,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:05:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash 282089810, now seen corresponding path program 4 times [2022-11-20 11:05:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72616885] [2022-11-20 11:05:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:10,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:10,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:05:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:10,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:05:10,831 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:05:10,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 11:05:10,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 11:05:10,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-20 11:05:10,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 11:05:10,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:05:10,835 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-20 11:05:10,838 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:05:10,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:05:10,893 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:05:10,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 568 flow [2022-11-20 11:05:10,964 INFO L130 PetriNetUnfolder]: 75/444 cut-off events. [2022-11-20 11:05:10,964 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-11-20 11:05:10,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 444 events. 75/444 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1741 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 274. Up to 12 conditions per place. [2022-11-20 11:05:10,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 568 flow [2022-11-20 11:05:10,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 568 flow [2022-11-20 11:05:10,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:10,988 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d8dd301, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:10,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 11:05:10,999 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-20 11:05:10,999 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:05:10,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:10,999 INFO L209 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] [2022-11-20 11:05:11,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:05:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash -451559023, now seen corresponding path program 1 times [2022-11-20 11:05:11,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:11,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611860851] [2022-11-20 11:05:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:11,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:11,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611860851] [2022-11-20 11:05:11,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611860851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:11,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:11,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:05:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508329722] [2022-11-20 11:05:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:11,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:05:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:05:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:05:11,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 275 [2022-11-20 11:05:11,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 275 transitions, 568 flow. Second operand has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:11,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 275 [2022-11-20 11:05:11,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:11,110 INFO L130 PetriNetUnfolder]: 9/373 cut-off events. [2022-11-20 11:05:11,111 INFO L131 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-11-20 11:05:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 373 events. 9/373 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1433 event pairs, 0 based on Foata normal form. 91/443 useless extension candidates. Maximal degree in co-relation 233. Up to 7 conditions per place. [2022-11-20 11:05:11,115 INFO L137 encePairwiseOnDemand]: 236/275 looper letters, 4 selfloop transitions, 0 changer transitions 1/233 dead transitions. [2022-11-20 11:05:11,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 233 transitions, 492 flow [2022-11-20 11:05:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:05:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:05:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 501 transitions. [2022-11-20 11:05:11,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9109090909090909 [2022-11-20 11:05:11,117 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 501 transitions. [2022-11-20 11:05:11,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 501 transitions. [2022-11-20 11:05:11,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:11,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 501 transitions. [2022-11-20 11:05:11,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,121 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,121 INFO L175 Difference]: Start difference. First operand has 235 places, 275 transitions, 568 flow. Second operand 2 states and 501 transitions. [2022-11-20 11:05:11,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 233 transitions, 492 flow [2022-11-20 11:05:11,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 233 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:05:11,126 INFO L231 Difference]: Finished difference. Result has 233 places, 232 transitions, 482 flow [2022-11-20 11:05:11,127 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=482, PETRI_PLACES=233, PETRI_TRANSITIONS=232} [2022-11-20 11:05:11,128 INFO L288 CegarLoopForPetriNet]: 235 programPoint places, -2 predicate places. [2022-11-20 11:05:11,128 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 232 transitions, 482 flow [2022-11-20 11:05:11,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:11,132 INFO L209 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] [2022-11-20 11:05:11,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:05:11,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:05:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:11,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2017606803, now seen corresponding path program 1 times [2022-11-20 11:05:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:11,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481014290] [2022-11-20 11:05:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:11,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:11,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481014290] [2022-11-20 11:05:11,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481014290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:11,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:11,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:11,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284444684] [2022-11-20 11:05:11,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:11,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:11,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:11,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-11-20 11:05:11,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 232 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:11,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-11-20 11:05:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:11,274 INFO L130 PetriNetUnfolder]: 9/376 cut-off events. [2022-11-20 11:05:11,274 INFO L131 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-11-20 11:05:11,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 376 events. 9/376 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1429 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 404. Up to 14 conditions per place. [2022-11-20 11:05:11,279 INFO L137 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-11-20 11:05:11,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 236 transitions, 520 flow [2022-11-20 11:05:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-11-20 11:05:11,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-11-20 11:05:11,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-11-20 11:05:11,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-11-20 11:05:11,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:11,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-11-20 11:05:11,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,295 INFO L175 Difference]: Start difference. First operand has 233 places, 232 transitions, 482 flow. Second operand 3 states and 682 transitions. [2022-11-20 11:05:11,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 236 transitions, 520 flow [2022-11-20 11:05:11,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 236 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:05:11,300 INFO L231 Difference]: Finished difference. Result has 235 places, 233 transitions, 494 flow [2022-11-20 11:05:11,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=235, PETRI_TRANSITIONS=233} [2022-11-20 11:05:11,301 INFO L288 CegarLoopForPetriNet]: 235 programPoint places, 0 predicate places. [2022-11-20 11:05:11,301 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 233 transitions, 494 flow [2022-11-20 11:05:11,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:11,302 INFO L209 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] [2022-11-20 11:05:11,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:05:11,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:05:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1078955039, now seen corresponding path program 1 times [2022-11-20 11:05:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:11,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371884163] [2022-11-20 11:05:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:11,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:11,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371884163] [2022-11-20 11:05:11,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371884163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:11,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343081511] [2022-11-20 11:05:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:11,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:11,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:11,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:11,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:05:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:11,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:05:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:11,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:11,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343081511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:11,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:11,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:05:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840508271] [2022-11-20 11:05:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:11,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:11,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:11,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-11-20 11:05:11,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 233 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:11,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-11-20 11:05:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:11,594 INFO L130 PetriNetUnfolder]: 7/331 cut-off events. [2022-11-20 11:05:11,594 INFO L131 PetriNetUnfolder]: For 21/45 co-relation queries the response was YES. [2022-11-20 11:05:11,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 331 events. 7/331 cut-off events. For 21/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1127 event pairs, 0 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 367. Up to 16 conditions per place. [2022-11-20 11:05:11,599 INFO L137 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2022-11-20 11:05:11,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 237 transitions, 532 flow [2022-11-20 11:05:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-11-20 11:05:11,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-11-20 11:05:11,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-11-20 11:05:11,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-11-20 11:05:11,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:11,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-11-20 11:05:11,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,607 INFO L175 Difference]: Start difference. First operand has 235 places, 233 transitions, 494 flow. Second operand 3 states and 682 transitions. [2022-11-20 11:05:11,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 237 transitions, 532 flow [2022-11-20 11:05:11,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:11,612 INFO L231 Difference]: Finished difference. Result has 237 places, 234 transitions, 504 flow [2022-11-20 11:05:11,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=504, PETRI_PLACES=237, PETRI_TRANSITIONS=234} [2022-11-20 11:05:11,613 INFO L288 CegarLoopForPetriNet]: 235 programPoint places, 2 predicate places. [2022-11-20 11:05:11,614 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 234 transitions, 504 flow [2022-11-20 11:05:11,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:11,614 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-20 11:05:11,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:11,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:05:11,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:05:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1849767997, now seen corresponding path program 1 times [2022-11-20 11:05:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:11,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26572548] [2022-11-20 11:05:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:11,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26572548] [2022-11-20 11:05:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26572548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803088670] [2022-11-20 11:05:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:11,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:11,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:11,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:11,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:05:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:12,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:05:12,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:12,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:12,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803088670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:12,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:12,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:05:12,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615561605] [2022-11-20 11:05:12,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:12,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:12,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:12,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-11-20 11:05:12,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 234 transitions, 504 flow. Second operand has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:12,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-11-20 11:05:12,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:12,240 INFO L130 PetriNetUnfolder]: 7/338 cut-off events. [2022-11-20 11:05:12,240 INFO L131 PetriNetUnfolder]: For 20/24 co-relation queries the response was YES. [2022-11-20 11:05:12,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 338 events. 7/338 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1122 event pairs, 0 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 385. Up to 11 conditions per place. [2022-11-20 11:05:12,245 INFO L137 encePairwiseOnDemand]: 269/275 looper letters, 14 selfloop transitions, 9 changer transitions 0/244 dead transitions. [2022-11-20 11:05:12,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 244 transitions, 572 flow [2022-11-20 11:05:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:05:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2014 transitions. [2022-11-20 11:05:12,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8137373737373738 [2022-11-20 11:05:12,252 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2014 transitions. [2022-11-20 11:05:12,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2014 transitions. [2022-11-20 11:05:12,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:12,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2014 transitions. [2022-11-20 11:05:12,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.77777777777777) internal successors, (2014), 9 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,263 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,263 INFO L175 Difference]: Start difference. First operand has 237 places, 234 transitions, 504 flow. Second operand 9 states and 2014 transitions. [2022-11-20 11:05:12,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 244 transitions, 572 flow [2022-11-20 11:05:12,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 244 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:12,268 INFO L231 Difference]: Finished difference. Result has 247 places, 240 transitions, 552 flow [2022-11-20 11:05:12,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=552, PETRI_PLACES=247, PETRI_TRANSITIONS=240} [2022-11-20 11:05:12,270 INFO L288 CegarLoopForPetriNet]: 235 programPoint places, 12 predicate places. [2022-11-20 11:05:12,270 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 240 transitions, 552 flow [2022-11-20 11:05:12,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:12,272 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:05:12,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 11:05:12,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:05:12,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:05:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1597542211, now seen corresponding path program 2 times [2022-11-20 11:05:12,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:12,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39849249] [2022-11-20 11:05:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:12,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:12,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39849249] [2022-11-20 11:05:12,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39849249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584519930] [2022-11-20 11:05:12,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:12,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:12,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:05:12,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:05:12,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:12,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:05:12,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:12,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:12,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584519930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:12,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:12,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:05:12,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28119383] [2022-11-20 11:05:12,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:05:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:05:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:05:12,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-11-20 11:05:12,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 240 transitions, 552 flow. Second operand has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:12,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-11-20 11:05:12,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:13,196 INFO L130 PetriNetUnfolder]: 7/358 cut-off events. [2022-11-20 11:05:13,196 INFO L131 PetriNetUnfolder]: For 40/44 co-relation queries the response was YES. [2022-11-20 11:05:13,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 358 events. 7/358 cut-off events. For 40/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1122 event pairs, 0 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 472. Up to 11 conditions per place. [2022-11-20 11:05:13,201 INFO L137 encePairwiseOnDemand]: 269/275 looper letters, 22 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2022-11-20 11:05:13,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 264 transitions, 746 flow [2022-11-20 11:05:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:05:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:05:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4688 transitions. [2022-11-20 11:05:13,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8117748917748918 [2022-11-20 11:05:13,213 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4688 transitions. [2022-11-20 11:05:13,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4688 transitions. [2022-11-20 11:05:13,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:13,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4688 transitions. [2022-11-20 11:05:13,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 223.23809523809524) internal successors, (4688), 21 states have internal predecessors, (4688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,240 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,240 INFO L175 Difference]: Start difference. First operand has 247 places, 240 transitions, 552 flow. Second operand 21 states and 4688 transitions. [2022-11-20 11:05:13,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 264 transitions, 746 flow [2022-11-20 11:05:13,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 264 transitions, 732 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:13,246 INFO L231 Difference]: Finished difference. Result has 271 places, 253 transitions, 676 flow [2022-11-20 11:05:13,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=676, PETRI_PLACES=271, PETRI_TRANSITIONS=253} [2022-11-20 11:05:13,247 INFO L288 CegarLoopForPetriNet]: 235 programPoint places, 36 predicate places. [2022-11-20 11:05:13,247 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 253 transitions, 676 flow [2022-11-20 11:05:13,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:13,249 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 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] [2022-11-20 11:05:13,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:13,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:05:13,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:05:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash -755629635, now seen corresponding path program 3 times [2022-11-20 11:05:13,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:13,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696311511] [2022-11-20 11:05:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:13,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:13,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696311511] [2022-11-20 11:05:13,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696311511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:13,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74205120] [2022-11-20 11:05:13,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:05:13,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:13,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:13,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:13,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:05:13,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 11:05:13,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:13,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:14,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:05:14,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74205120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:14,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:14,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 11:05:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653944529] [2022-11-20 11:05:14,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:14,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:05:14,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:05:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:05:14,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-11-20 11:05:14,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 253 transitions, 676 flow. Second operand has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:14,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-11-20 11:05:14,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:14,739 INFO L130 PetriNetUnfolder]: 7/373 cut-off events. [2022-11-20 11:05:14,739 INFO L131 PetriNetUnfolder]: For 128/132 co-relation queries the response was YES. [2022-11-20 11:05:14,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 373 events. 7/373 cut-off events. For 128/132 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1123 event pairs, 0 based on Foata normal form. 3/362 useless extension candidates. Maximal degree in co-relation 568. Up to 17 conditions per place. [2022-11-20 11:05:14,745 INFO L137 encePairwiseOnDemand]: 269/275 looper letters, 28 selfloop transitions, 30 changer transitions 0/279 dead transitions. [2022-11-20 11:05:14,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 279 transitions, 938 flow [2022-11-20 11:05:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:05:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:05:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6691 transitions. [2022-11-20 11:05:14,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.811030303030303 [2022-11-20 11:05:14,755 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6691 transitions. [2022-11-20 11:05:14,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6691 transitions. [2022-11-20 11:05:14,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:14,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6691 transitions. [2022-11-20 11:05:14,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 223.03333333333333) internal successors, (6691), 30 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,791 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,791 INFO L175 Difference]: Start difference. First operand has 271 places, 253 transitions, 676 flow. Second operand 30 states and 6691 transitions. [2022-11-20 11:05:14,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 279 transitions, 938 flow [2022-11-20 11:05:14,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 279 transitions, 908 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-20 11:05:14,798 INFO L231 Difference]: Finished difference. Result has 298 places, 263 transitions, 804 flow [2022-11-20 11:05:14,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=804, PETRI_PLACES=298, PETRI_TRANSITIONS=263} [2022-11-20 11:05:14,800 INFO L288 CegarLoopForPetriNet]: 235 programPoint places, 63 predicate places. [2022-11-20 11:05:14,800 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 263 transitions, 804 flow [2022-11-20 11:05:14,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:14,802 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 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] [2022-11-20 11:05:14,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:15,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:15,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:05:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1849066191, now seen corresponding path program 4 times [2022-11-20 11:05:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045362757] [2022-11-20 11:05:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:15,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:15,049 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:05:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:15,102 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:05:15,102 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:05:15,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 11:05:15,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 11:05:15,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 11:05:15,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 11:05:15,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 11:05:15,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:05:15,103 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-20 11:05:15,104 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:05:15,104 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:05:15,149 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:05:15,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 350 transitions, 730 flow [2022-11-20 11:05:15,286 INFO L130 PetriNetUnfolder]: 110/649 cut-off events. [2022-11-20 11:05:15,286 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-11-20 11:05:15,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 649 events. 110/649 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2859 event pairs, 1 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2022-11-20 11:05:15,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 350 transitions, 730 flow [2022-11-20 11:05:15,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 350 transitions, 730 flow [2022-11-20 11:05:15,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:15,312 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d8dd301, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:15,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 11:05:15,321 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-20 11:05:15,321 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:05:15,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:15,321 INFO L209 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] [2022-11-20 11:05:15,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:05:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1315751761, now seen corresponding path program 1 times [2022-11-20 11:05:15,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:15,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842993604] [2022-11-20 11:05:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:15,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:15,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:15,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842993604] [2022-11-20 11:05:15,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842993604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:15,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:15,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:05:15,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9035948] [2022-11-20 11:05:15,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:15,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:05:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:05:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:05:15,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 350 [2022-11-20 11:05:15,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 350 transitions, 730 flow. Second operand has 2 states, 2 states have (on average 290.0) internal successors, (580), 2 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:15,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 350 [2022-11-20 11:05:15,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:15,466 INFO L130 PetriNetUnfolder]: 16/548 cut-off events. [2022-11-20 11:05:15,466 INFO L131 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-11-20 11:05:15,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 548 events. 16/548 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2495 event pairs, 1 based on Foata normal form. 208/725 useless extension candidates. Maximal degree in co-relation 387. Up to 16 conditions per place. [2022-11-20 11:05:15,477 INFO L137 encePairwiseOnDemand]: 299/350 looper letters, 6 selfloop transitions, 0 changer transitions 1/295 dead transitions. [2022-11-20 11:05:15,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 295 transitions, 632 flow [2022-11-20 11:05:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:05:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:05:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 635 transitions. [2022-11-20 11:05:15,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9071428571428571 [2022-11-20 11:05:15,481 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 635 transitions. [2022-11-20 11:05:15,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 635 transitions. [2022-11-20 11:05:15,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:15,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 635 transitions. [2022-11-20 11:05:15,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 317.5) internal successors, (635), 2 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,485 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,486 INFO L175 Difference]: Start difference. First operand has 298 places, 350 transitions, 730 flow. Second operand 2 states and 635 transitions. [2022-11-20 11:05:15,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 295 transitions, 632 flow [2022-11-20 11:05:15,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 295 transitions, 632 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:05:15,491 INFO L231 Difference]: Finished difference. Result has 295 places, 294 transitions, 618 flow [2022-11-20 11:05:15,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=618, PETRI_PLACES=295, PETRI_TRANSITIONS=294} [2022-11-20 11:05:15,493 INFO L288 CegarLoopForPetriNet]: 298 programPoint places, -3 predicate places. [2022-11-20 11:05:15,493 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 294 transitions, 618 flow [2022-11-20 11:05:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 290.0) internal successors, (580), 2 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:15,494 INFO L209 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] [2022-11-20 11:05:15,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:05:15,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:05:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash -510049709, now seen corresponding path program 1 times [2022-11-20 11:05:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:15,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112726423] [2022-11-20 11:05:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:15,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:15,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:15,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112726423] [2022-11-20 11:05:15,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112726423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:15,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:15,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153330252] [2022-11-20 11:05:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:15,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:15,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:15,534 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-11-20 11:05:15,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 294 transitions, 618 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:15,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-11-20 11:05:15,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:15,713 INFO L130 PetriNetUnfolder]: 16/551 cut-off events. [2022-11-20 11:05:15,713 INFO L131 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-11-20 11:05:15,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 551 events. 16/551 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2491 event pairs, 1 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 601. Up to 23 conditions per place. [2022-11-20 11:05:15,724 INFO L137 encePairwiseOnDemand]: 347/350 looper letters, 15 selfloop transitions, 2 changer transitions 0/298 dead transitions. [2022-11-20 11:05:15,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 298 transitions, 660 flow [2022-11-20 11:05:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-11-20 11:05:15,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8228571428571428 [2022-11-20 11:05:15,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-11-20 11:05:15,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-11-20 11:05:15,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:15,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-11-20 11:05:15,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,731 INFO L175 Difference]: Start difference. First operand has 295 places, 294 transitions, 618 flow. Second operand 3 states and 864 transitions. [2022-11-20 11:05:15,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 298 transitions, 660 flow [2022-11-20 11:05:15,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 298 transitions, 660 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:05:15,736 INFO L231 Difference]: Finished difference. Result has 297 places, 295 transitions, 630 flow [2022-11-20 11:05:15,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=297, PETRI_TRANSITIONS=295} [2022-11-20 11:05:15,737 INFO L288 CegarLoopForPetriNet]: 298 programPoint places, -1 predicate places. [2022-11-20 11:05:15,738 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 295 transitions, 630 flow [2022-11-20 11:05:15,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:15,738 INFO L209 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] [2022-11-20 11:05:15,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:05:15,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:05:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -115431363, now seen corresponding path program 1 times [2022-11-20 11:05:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418171034] [2022-11-20 11:05:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:15,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:15,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418171034] [2022-11-20 11:05:15,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418171034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:15,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273292185] [2022-11-20 11:05:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:15,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:15,802 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:15,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:05:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:15,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:05:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:15,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:15,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273292185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:15,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:15,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:05:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368848950] [2022-11-20 11:05:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:15,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:15,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-11-20 11:05:15,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 295 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:15,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:15,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-11-20 11:05:15,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:16,068 INFO L130 PetriNetUnfolder]: 14/506 cut-off events. [2022-11-20 11:05:16,068 INFO L131 PetriNetUnfolder]: For 44/83 co-relation queries the response was YES. [2022-11-20 11:05:16,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 506 events. 14/506 cut-off events. For 44/83 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2191 event pairs, 1 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 569. Up to 30 conditions per place. [2022-11-20 11:05:16,079 INFO L137 encePairwiseOnDemand]: 347/350 looper letters, 15 selfloop transitions, 2 changer transitions 0/299 dead transitions. [2022-11-20 11:05:16,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 299 transitions, 672 flow [2022-11-20 11:05:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-11-20 11:05:16,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8228571428571428 [2022-11-20 11:05:16,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-11-20 11:05:16,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-11-20 11:05:16,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:16,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-11-20 11:05:16,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,086 INFO L175 Difference]: Start difference. First operand has 297 places, 295 transitions, 630 flow. Second operand 3 states and 864 transitions. [2022-11-20 11:05:16,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 299 transitions, 672 flow [2022-11-20 11:05:16,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 299 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:16,092 INFO L231 Difference]: Finished difference. Result has 299 places, 296 transitions, 640 flow [2022-11-20 11:05:16,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=299, PETRI_TRANSITIONS=296} [2022-11-20 11:05:16,093 INFO L288 CegarLoopForPetriNet]: 298 programPoint places, 1 predicate places. [2022-11-20 11:05:16,093 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 296 transitions, 640 flow [2022-11-20 11:05:16,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:16,094 INFO L209 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] [2022-11-20 11:05:16,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:16,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:05:16,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:05:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash 417894738, now seen corresponding path program 1 times [2022-11-20 11:05:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:16,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787828053] [2022-11-20 11:05:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787828053] [2022-11-20 11:05:16,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787828053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:16,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965876863] [2022-11-20 11:05:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:16,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:16,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:05:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:05:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:16,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:16,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965876863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:16,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:16,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:05:16,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294258067] [2022-11-20 11:05:16,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:16,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:16,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:16,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:16,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-11-20 11:05:16,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 296 transitions, 640 flow. Second operand has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:16,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-11-20 11:05:16,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:16,776 INFO L130 PetriNetUnfolder]: 14/513 cut-off events. [2022-11-20 11:05:16,776 INFO L131 PetriNetUnfolder]: For 51/60 co-relation queries the response was YES. [2022-11-20 11:05:16,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 513 events. 14/513 cut-off events. For 51/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2178 event pairs, 1 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 584. Up to 20 conditions per place. [2022-11-20 11:05:16,787 INFO L137 encePairwiseOnDemand]: 344/350 looper letters, 16 selfloop transitions, 9 changer transitions 0/306 dead transitions. [2022-11-20 11:05:16,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 306 transitions, 712 flow [2022-11-20 11:05:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:05:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2556 transitions. [2022-11-20 11:05:16,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8114285714285714 [2022-11-20 11:05:16,793 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2556 transitions. [2022-11-20 11:05:16,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2556 transitions. [2022-11-20 11:05:16,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:16,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2556 transitions. [2022-11-20 11:05:16,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,805 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,805 INFO L175 Difference]: Start difference. First operand has 299 places, 296 transitions, 640 flow. Second operand 9 states and 2556 transitions. [2022-11-20 11:05:16,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 306 transitions, 712 flow [2022-11-20 11:05:16,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 306 transitions, 710 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:16,811 INFO L231 Difference]: Finished difference. Result has 309 places, 302 transitions, 688 flow [2022-11-20 11:05:16,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=688, PETRI_PLACES=309, PETRI_TRANSITIONS=302} [2022-11-20 11:05:16,813 INFO L288 CegarLoopForPetriNet]: 298 programPoint places, 11 predicate places. [2022-11-20 11:05:16,813 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 302 transitions, 688 flow [2022-11-20 11:05:16,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:16,815 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:16,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:17,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:05:17,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:05:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:17,020 INFO L85 PathProgramCache]: Analyzing trace with hash 575842066, now seen corresponding path program 2 times [2022-11-20 11:05:17,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009148181] [2022-11-20 11:05:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:17,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 11:05:17,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009148181] [2022-11-20 11:05:17,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009148181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040696641] [2022-11-20 11:05:17,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:17,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:17,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:17,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:05:17,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:05:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:05:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:17,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:17,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040696641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:17,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:17,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 11:05:17,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682177067] [2022-11-20 11:05:17,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:17,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:05:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:05:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:05:17,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 350 [2022-11-20 11:05:17,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 302 transitions, 688 flow. Second operand has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:17,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 350 [2022-11-20 11:05:17,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:17,874 INFO L130 PetriNetUnfolder]: 12/488 cut-off events. [2022-11-20 11:05:17,874 INFO L131 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-11-20 11:05:17,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 488 events. 12/488 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1765 event pairs, 2 based on Foata normal form. 6/473 useless extension candidates. Maximal degree in co-relation 645. Up to 29 conditions per place. [2022-11-20 11:05:17,885 INFO L137 encePairwiseOnDemand]: 339/350 looper letters, 35 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2022-11-20 11:05:17,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 334 transitions, 936 flow [2022-11-20 11:05:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:05:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 11:05:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6916 transitions. [2022-11-20 11:05:17,898 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7904 [2022-11-20 11:05:17,898 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6916 transitions. [2022-11-20 11:05:17,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6916 transitions. [2022-11-20 11:05:17,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:17,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6916 transitions. [2022-11-20 11:05:17,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 276.64) internal successors, (6916), 25 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,929 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,930 INFO L175 Difference]: Start difference. First operand has 309 places, 302 transitions, 688 flow. Second operand 25 states and 6916 transitions. [2022-11-20 11:05:17,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 334 transitions, 936 flow [2022-11-20 11:05:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 334 transitions, 922 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:17,937 INFO L231 Difference]: Finished difference. Result has 340 places, 318 transitions, 846 flow [2022-11-20 11:05:17,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=846, PETRI_PLACES=340, PETRI_TRANSITIONS=318} [2022-11-20 11:05:17,938 INFO L288 CegarLoopForPetriNet]: 298 programPoint places, 42 predicate places. [2022-11-20 11:05:17,939 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 318 transitions, 846 flow [2022-11-20 11:05:17,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:17,941 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:17,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:18,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:05:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash -302385302, now seen corresponding path program 1 times [2022-11-20 11:05:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:18,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708891571] [2022-11-20 11:05:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:18,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:18,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708891571] [2022-11-20 11:05:18,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708891571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991670124] [2022-11-20 11:05:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:18,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:18,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:18,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:18,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:05:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:18,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:18,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:18,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:18,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991670124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:18,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:18,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 11:05:18,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655836563] [2022-11-20 11:05:18,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:18,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:05:18,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:18,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:05:18,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:05:18,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-11-20 11:05:18,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 318 transitions, 846 flow. Second operand has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:18,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:18,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-11-20 11:05:18,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:19,396 INFO L130 PetriNetUnfolder]: 12/503 cut-off events. [2022-11-20 11:05:19,396 INFO L131 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-11-20 11:05:19,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 503 events. 12/503 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1765 event pairs, 2 based on Foata normal form. 3/485 useless extension candidates. Maximal degree in co-relation 737. Up to 20 conditions per place. [2022-11-20 11:05:19,410 INFO L137 encePairwiseOnDemand]: 344/350 looper letters, 30 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2022-11-20 11:05:19,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 344 transitions, 1112 flow [2022-11-20 11:05:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:05:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:05:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8493 transitions. [2022-11-20 11:05:19,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8088571428571428 [2022-11-20 11:05:19,422 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8493 transitions. [2022-11-20 11:05:19,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8493 transitions. [2022-11-20 11:05:19,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:19,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8493 transitions. [2022-11-20 11:05:19,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 283.1) internal successors, (8493), 30 states have internal predecessors, (8493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,517 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,517 INFO L175 Difference]: Start difference. First operand has 340 places, 318 transitions, 846 flow. Second operand 30 states and 8493 transitions. [2022-11-20 11:05:19,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 344 transitions, 1112 flow [2022-11-20 11:05:19,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 344 transitions, 1078 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-20 11:05:19,528 INFO L231 Difference]: Finished difference. Result has 366 places, 328 transitions, 970 flow [2022-11-20 11:05:19,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=970, PETRI_PLACES=366, PETRI_TRANSITIONS=328} [2022-11-20 11:05:19,530 INFO L288 CegarLoopForPetriNet]: 298 programPoint places, 68 predicate places. [2022-11-20 11:05:19,530 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 328 transitions, 970 flow [2022-11-20 11:05:19,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:19,533 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:19,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:19,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:19,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:05:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1140146688, now seen corresponding path program 2 times [2022-11-20 11:05:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192536033] [2022-11-20 11:05:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:19,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-20 11:05:20,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192536033] [2022-11-20 11:05:20,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192536033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:20,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:20,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 11:05:20,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616069820] [2022-11-20 11:05:20,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:20,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:05:20,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:05:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:05:20,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 350 [2022-11-20 11:05:20,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 328 transitions, 970 flow. Second operand has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:20,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:20,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 350 [2022-11-20 11:05:20,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:01,788 INFO L130 PetriNetUnfolder]: 62497/170320 cut-off events. [2022-11-20 11:06:01,789 INFO L131 PetriNetUnfolder]: For 13726/13745 co-relation queries the response was YES. [2022-11-20 11:06:03,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270610 conditions, 170320 events. 62497/170320 cut-off events. For 13726/13745 co-relation queries the response was YES. Maximal size of possible extension queue 4970. Compared 2524137 event pairs, 41170 based on Foata normal form. 19/157532 useless extension candidates. Maximal degree in co-relation 270587. Up to 61103 conditions per place. [2022-11-20 11:06:04,640 INFO L137 encePairwiseOnDemand]: 332/350 looper letters, 264 selfloop transitions, 31 changer transitions 0/554 dead transitions. [2022-11-20 11:06:04,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 554 transitions, 2255 flow [2022-11-20 11:06:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:06:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 11:06:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5327 transitions. [2022-11-20 11:06:04,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6918181818181818 [2022-11-20 11:06:04,655 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5327 transitions. [2022-11-20 11:06:04,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5327 transitions. [2022-11-20 11:06:04,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:04,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5327 transitions. [2022-11-20 11:06:04,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 242.13636363636363) internal successors, (5327), 22 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:04,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:04,680 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:04,681 INFO L175 Difference]: Start difference. First operand has 366 places, 328 transitions, 970 flow. Second operand 22 states and 5327 transitions. [2022-11-20 11:06:04,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 554 transitions, 2255 flow [2022-11-20 11:06:04,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 554 transitions, 2211 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-11-20 11:06:04,817 INFO L231 Difference]: Finished difference. Result has 379 places, 360 transitions, 1131 flow [2022-11-20 11:06:04,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1131, PETRI_PLACES=379, PETRI_TRANSITIONS=360} [2022-11-20 11:06:04,818 INFO L288 CegarLoopForPetriNet]: 298 programPoint places, 81 predicate places. [2022-11-20 11:06:04,818 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 360 transitions, 1131 flow [2022-11-20 11:06:04,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:04,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:04,820 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:04,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:06:04,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:06:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2007247325, now seen corresponding path program 1 times [2022-11-20 11:06:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:04,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637632668] [2022-11-20 11:06:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:04,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:06:04,860 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:06:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:06:04,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:06:04,911 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:06:04,912 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 11:06:04,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 11:06:04,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 11:06:04,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 11:06:04,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 11:06:04,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 11:06:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:06:04,915 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-11-20 11:06:04,916 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:06:04,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 11:06:04,960 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:06:04,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 361 places, 425 transitions, 894 flow [2022-11-20 11:06:05,158 INFO L130 PetriNetUnfolder]: 157/922 cut-off events. [2022-11-20 11:06:05,159 INFO L131 PetriNetUnfolder]: For 48/54 co-relation queries the response was YES. [2022-11-20 11:06:05,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 922 events. 157/922 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4389 event pairs, 6 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 669. Up to 32 conditions per place. [2022-11-20 11:06:05,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 425 transitions, 894 flow [2022-11-20 11:06:05,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 361 places, 425 transitions, 894 flow [2022-11-20 11:06:05,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:06:05,194 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d8dd301, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:06:05,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 11:06:05,202 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-20 11:06:05,202 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:06:05,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:05,202 INFO L209 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] [2022-11-20 11:06:05,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 11:06:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1621071729, now seen corresponding path program 1 times [2022-11-20 11:06:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:05,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089585156] [2022-11-20 11:06:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:05,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:05,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:05,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089585156] [2022-11-20 11:06:05,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089585156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:05,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:05,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:06:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450939545] [2022-11-20 11:06:05,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:05,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:06:05,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:06:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:06:05,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 425 [2022-11-20 11:06:05,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 425 transitions, 894 flow. Second operand has 2 states, 2 states have (on average 350.0) internal successors, (700), 2 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:05,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 425 [2022-11-20 11:06:05,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:05,418 INFO L130 PetriNetUnfolder]: 31/787 cut-off events. [2022-11-20 11:06:05,418 INFO L131 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-11-20 11:06:05,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 787 events. 31/787 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3917 event pairs, 6 based on Foata normal form. 481/1223 useless extension candidates. Maximal degree in co-relation 583. Up to 37 conditions per place. [2022-11-20 11:06:05,438 INFO L137 encePairwiseOnDemand]: 362/425 looper letters, 8 selfloop transitions, 0 changer transitions 1/357 dead transitions. [2022-11-20 11:06:05,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 357 transitions, 774 flow [2022-11-20 11:06:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:06:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:06:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 769 transitions. [2022-11-20 11:06:05,440 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9047058823529411 [2022-11-20 11:06:05,441 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 769 transitions. [2022-11-20 11:06:05,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 769 transitions. [2022-11-20 11:06:05,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:05,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 769 transitions. [2022-11-20 11:06:05,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 384.5) internal successors, (769), 2 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,445 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,445 INFO L175 Difference]: Start difference. First operand has 361 places, 425 transitions, 894 flow. Second operand 2 states and 769 transitions. [2022-11-20 11:06:05,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 357 transitions, 774 flow [2022-11-20 11:06:05,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 357 transitions, 774 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:06:05,451 INFO L231 Difference]: Finished difference. Result has 357 places, 356 transitions, 756 flow [2022-11-20 11:06:05,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=756, PETRI_PLACES=357, PETRI_TRANSITIONS=356} [2022-11-20 11:06:05,454 INFO L288 CegarLoopForPetriNet]: 361 programPoint places, -4 predicate places. [2022-11-20 11:06:05,454 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 356 transitions, 756 flow [2022-11-20 11:06:05,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 350.0) internal successors, (700), 2 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:05,456 INFO L209 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] [2022-11-20 11:06:05,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:06:05,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 11:06:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -204729741, now seen corresponding path program 1 times [2022-11-20 11:06:05,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:05,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408633423] [2022-11-20 11:06:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:05,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:05,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408633423] [2022-11-20 11:06:05,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408633423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:05,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:05,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281329314] [2022-11-20 11:06:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:05,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:06:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:06:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:06:05,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-11-20 11:06:05,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 356 transitions, 756 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:05,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-11-20 11:06:05,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:05,708 INFO L130 PetriNetUnfolder]: 31/790 cut-off events. [2022-11-20 11:06:05,708 INFO L131 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-11-20 11:06:05,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 790 events. 31/790 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3920 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 887. Up to 44 conditions per place. [2022-11-20 11:06:05,727 INFO L137 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/360 dead transitions. [2022-11-20 11:06:05,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 360 transitions, 802 flow [2022-11-20 11:06:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:06:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:06:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-11-20 11:06:05,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-11-20 11:06:05,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-11-20 11:06:05,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-11-20 11:06:05,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:05,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-11-20 11:06:05,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,737 INFO L175 Difference]: Start difference. First operand has 357 places, 356 transitions, 756 flow. Second operand 3 states and 1046 transitions. [2022-11-20 11:06:05,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 360 transitions, 802 flow [2022-11-20 11:06:05,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 360 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:06:05,743 INFO L231 Difference]: Finished difference. Result has 359 places, 357 transitions, 768 flow [2022-11-20 11:06:05,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=359, PETRI_TRANSITIONS=357} [2022-11-20 11:06:05,744 INFO L288 CegarLoopForPetriNet]: 361 programPoint places, -2 predicate places. [2022-11-20 11:06:05,744 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 357 transitions, 768 flow [2022-11-20 11:06:05,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:05,745 INFO L209 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] [2022-11-20 11:06:05,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 11:06:05,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 11:06:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:05,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1258974330, now seen corresponding path program 1 times [2022-11-20 11:06:05,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:05,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949892274] [2022-11-20 11:06:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:05,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:05,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:05,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949892274] [2022-11-20 11:06:05,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949892274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475141843] [2022-11-20 11:06:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:05,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:05,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:05,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:06:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:05,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:06:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:05,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475141843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:05,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:06:05,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:06:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939606265] [2022-11-20 11:06:05,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:05,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:06:05,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:06:05,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:05,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-11-20 11:06:05,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 357 transitions, 768 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:05,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:05,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-11-20 11:06:05,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:06,206 INFO L130 PetriNetUnfolder]: 29/745 cut-off events. [2022-11-20 11:06:06,207 INFO L131 PetriNetUnfolder]: For 113/175 co-relation queries the response was YES. [2022-11-20 11:06:06,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 745 events. 29/745 cut-off events. For 113/175 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3654 event pairs, 6 based on Foata normal form. 1/706 useless extension candidates. Maximal degree in co-relation 860. Up to 56 conditions per place. [2022-11-20 11:06:06,226 INFO L137 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/361 dead transitions. [2022-11-20 11:06:06,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 361 transitions, 814 flow [2022-11-20 11:06:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:06:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:06:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-11-20 11:06:06,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-11-20 11:06:06,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-11-20 11:06:06,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-11-20 11:06:06,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:06,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-11-20 11:06:06,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:06,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:06,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:06,236 INFO L175 Difference]: Start difference. First operand has 359 places, 357 transitions, 768 flow. Second operand 3 states and 1046 transitions. [2022-11-20 11:06:06,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 361 transitions, 814 flow [2022-11-20 11:06:06,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 361 transitions, 812 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:06:06,243 INFO L231 Difference]: Finished difference. Result has 361 places, 358 transitions, 778 flow [2022-11-20 11:06:06,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=778, PETRI_PLACES=361, PETRI_TRANSITIONS=358} [2022-11-20 11:06:06,244 INFO L288 CegarLoopForPetriNet]: 361 programPoint places, 0 predicate places. [2022-11-20 11:06:06,244 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 358 transitions, 778 flow [2022-11-20 11:06:06,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:06,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:06,245 INFO L209 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] [2022-11-20 11:06:06,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 11:06:06,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 11:06:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1713893572, now seen corresponding path program 1 times [2022-11-20 11:06:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553326652] [2022-11-20 11:06:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:06,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:06,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553326652] [2022-11-20 11:06:06,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553326652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052163066] [2022-11-20 11:06:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:06,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:06,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:06,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:06,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:06:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:06:06,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:06,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:06,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052163066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:06,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:06:06,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:06:06,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846423600] [2022-11-20 11:06:06,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:06,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:06,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-11-20 11:06:06,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 358 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:06,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:06,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-11-20 11:06:06,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:07,277 INFO L130 PetriNetUnfolder]: 29/752 cut-off events. [2022-11-20 11:06:07,277 INFO L131 PetriNetUnfolder]: For 124/139 co-relation queries the response was YES. [2022-11-20 11:06:07,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 752 events. 29/752 cut-off events. For 124/139 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3650 event pairs, 6 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 872. Up to 41 conditions per place. [2022-11-20 11:06:07,294 INFO L137 encePairwiseOnDemand]: 419/425 looper letters, 18 selfloop transitions, 9 changer transitions 0/368 dead transitions. [2022-11-20 11:06:07,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 368 transitions, 854 flow [2022-11-20 11:06:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:06:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:06:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3098 transitions. [2022-11-20 11:06:07,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8099346405228758 [2022-11-20 11:06:07,300 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3098 transitions. [2022-11-20 11:06:07,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3098 transitions. [2022-11-20 11:06:07,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:07,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3098 transitions. [2022-11-20 11:06:07,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 344.22222222222223) internal successors, (3098), 9 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:07,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:07,312 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:07,313 INFO L175 Difference]: Start difference. First operand has 361 places, 358 transitions, 778 flow. Second operand 9 states and 3098 transitions. [2022-11-20 11:06:07,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 368 transitions, 854 flow [2022-11-20 11:06:07,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 368 transitions, 852 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:06:07,319 INFO L231 Difference]: Finished difference. Result has 371 places, 364 transitions, 826 flow [2022-11-20 11:06:07,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=371, PETRI_TRANSITIONS=364} [2022-11-20 11:06:07,320 INFO L288 CegarLoopForPetriNet]: 361 programPoint places, 10 predicate places. [2022-11-20 11:06:07,320 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 364 transitions, 826 flow [2022-11-20 11:06:07,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:07,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:07,322 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:07,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:07,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:06:07,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 11:06:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash -499580700, now seen corresponding path program 2 times [2022-11-20 11:06:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:07,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7511863] [2022-11-20 11:06:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 11:06:07,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7511863] [2022-11-20 11:06:07,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7511863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077523030] [2022-11-20 11:06:07,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:07,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:07,596 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:07,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:06:07,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:07,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:07,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:06:07,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:07,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077523030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:07,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:06:07,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 11:06:07,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531025228] [2022-11-20 11:06:07,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:07,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:06:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:06:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:06:07,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 425 [2022-11-20 11:06:07,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 364 transitions, 826 flow. Second operand has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:07,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:07,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 425 [2022-11-20 11:06:07,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:08,465 INFO L130 PetriNetUnfolder]: 27/727 cut-off events. [2022-11-20 11:06:08,465 INFO L131 PetriNetUnfolder]: For 134/179 co-relation queries the response was YES. [2022-11-20 11:06:08,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 727 events. 27/727 cut-off events. For 134/179 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3305 event pairs, 7 based on Foata normal form. 6/699 useless extension candidates. Maximal degree in co-relation 939. Up to 56 conditions per place. [2022-11-20 11:06:08,477 INFO L137 encePairwiseOnDemand]: 414/425 looper letters, 37 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2022-11-20 11:06:08,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 396 transitions, 1078 flow [2022-11-20 11:06:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:06:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 11:06:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 8418 transitions. [2022-11-20 11:06:08,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922823529411764 [2022-11-20 11:06:08,489 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 8418 transitions. [2022-11-20 11:06:08,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 8418 transitions. [2022-11-20 11:06:08,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:08,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 8418 transitions. [2022-11-20 11:06:08,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 336.72) internal successors, (8418), 25 states have internal predecessors, (8418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:08,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:08,524 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:08,524 INFO L175 Difference]: Start difference. First operand has 371 places, 364 transitions, 826 flow. Second operand 25 states and 8418 transitions. [2022-11-20 11:06:08,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 396 transitions, 1078 flow [2022-11-20 11:06:08,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 396 transitions, 1064 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:06:08,532 INFO L231 Difference]: Finished difference. Result has 402 places, 380 transitions, 984 flow [2022-11-20 11:06:08,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=984, PETRI_PLACES=402, PETRI_TRANSITIONS=380} [2022-11-20 11:06:08,534 INFO L288 CegarLoopForPetriNet]: 361 programPoint places, 41 predicate places. [2022-11-20 11:06:08,534 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 380 transitions, 984 flow [2022-11-20 11:06:08,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:08,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:08,536 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:08,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:08,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:06:08,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 11:06:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 546551868, now seen corresponding path program 1 times [2022-11-20 11:06:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:08,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66594809] [2022-11-20 11:06:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:08,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:09,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:09,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66594809] [2022-11-20 11:06:09,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66594809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:09,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810948745] [2022-11-20 11:06:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:09,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:09,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:09,083 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:09,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:06:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:06:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:09,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:09,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810948745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:09,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:06:09,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 11:06:09,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138833436] [2022-11-20 11:06:09,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:09,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:06:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:09,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:06:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:06:09,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-11-20 11:06:09,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 380 transitions, 984 flow. Second operand has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:09,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:09,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-11-20 11:06:09,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:10,165 INFO L130 PetriNetUnfolder]: 27/742 cut-off events. [2022-11-20 11:06:10,165 INFO L131 PetriNetUnfolder]: For 244/253 co-relation queries the response was YES. [2022-11-20 11:06:10,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 742 events. 27/742 cut-off events. For 244/253 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3311 event pairs, 7 based on Foata normal form. 3/711 useless extension candidates. Maximal degree in co-relation 1029. Up to 41 conditions per place. [2022-11-20 11:06:10,185 INFO L137 encePairwiseOnDemand]: 419/425 looper letters, 32 selfloop transitions, 30 changer transitions 0/406 dead transitions. [2022-11-20 11:06:10,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 406 transitions, 1254 flow [2022-11-20 11:06:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:06:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:06:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 10295 transitions. [2022-11-20 11:06:10,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8074509803921569 [2022-11-20 11:06:10,199 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 10295 transitions. [2022-11-20 11:06:10,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 10295 transitions. [2022-11-20 11:06:10,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:10,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 10295 transitions. [2022-11-20 11:06:10,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 343.1666666666667) internal successors, (10295), 30 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:10,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:10,248 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:10,249 INFO L175 Difference]: Start difference. First operand has 402 places, 380 transitions, 984 flow. Second operand 30 states and 10295 transitions. [2022-11-20 11:06:10,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 406 transitions, 1254 flow [2022-11-20 11:06:10,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 406 transitions, 1220 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-20 11:06:10,258 INFO L231 Difference]: Finished difference. Result has 428 places, 390 transitions, 1108 flow [2022-11-20 11:06:10,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1108, PETRI_PLACES=428, PETRI_TRANSITIONS=390} [2022-11-20 11:06:10,260 INFO L288 CegarLoopForPetriNet]: 361 programPoint places, 67 predicate places. [2022-11-20 11:06:10,260 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 390 transitions, 1108 flow [2022-11-20 11:06:10,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:10,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:10,263 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:10,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:10,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b0264c7-59e4-4d6f-8839-aa657f174e67/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:06:10,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 11:06:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:10,470 INFO L85 PathProgramCache]: Analyzing trace with hash 961894633, now seen corresponding path program 2 times [2022-11-20 11:06:10,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:10,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964627662] [2022-11-20 11:06:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:10,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-20 11:06:11,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964627662] [2022-11-20 11:06:11,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964627662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:11,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:11,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 11:06:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788800498] [2022-11-20 11:06:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:06:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:06:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:06:11,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 425 [2022-11-20 11:06:11,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 390 transitions, 1108 flow. Second operand has 15 states, 15 states have (on average 284.0) internal successors, (4260), 15 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:11,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:11,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 425 [2022-11-20 11:06:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand