./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/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_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/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_3eac5ff6-cfde-4f76-99b0-27fb7c077281/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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- 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 10:46:28,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:46:28,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:46:28,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:46:28,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:46:28,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:46:28,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:46:28,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:46:28,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:46:28,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:46:28,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:46:28,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:46:28,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:46:28,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:46:28,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:46:28,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:46:28,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:46:28,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:46:28,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:46:28,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:46:28,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:46:28,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:46:28,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:46:28,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:46:28,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:46:28,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:46:28,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:46:28,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:46:28,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:46:28,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:46:28,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:46:28,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:46:28,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:46:28,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:46:28,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:46:28,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:46:28,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:46:28,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:46:28,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:46:28,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:46:28,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:46:28,774 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:46:28,797 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:46:28,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:46:28,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:46:28,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:46:28,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:46:28,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:46:28,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:46:28,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:46:28,801 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:46:28,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:46:28,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:46:28,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:46:28,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:46:28,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:46:28,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:46:28,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:46:28,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:46:28,804 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:46:28,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:46:28,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:46:28,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:46:28,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:46:28,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:46:28,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:46:28,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:46:28,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:46:28,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:46:28,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:46:28,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:46:28,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:46:28,808 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:46:28,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:46:28,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:46:28,809 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_3eac5ff6-cfde-4f76-99b0-27fb7c077281/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2022-11-20 10:46:29,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:46:29,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:46:29,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:46:29,118 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:46:29,119 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:46:29,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-20 10:46:32,452 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:46:32,823 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:46:32,824 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-20 10:46:32,845 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/data/4741759bc/167a72a3eecc4ad8b1a3d6721db13830/FLAG676c6c311 [2022-11-20 10:46:32,861 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/data/4741759bc/167a72a3eecc4ad8b1a3d6721db13830 [2022-11-20 10:46:32,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:46:32,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:46:32,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:46:32,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:46:32,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:46:32,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:32" (1/1) ... [2022-11-20 10:46:32,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6955c89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:32, skipping insertion in model container [2022-11-20 10:46:32,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:32" (1/1) ... [2022-11-20 10:46:32,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:46:32,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:46:33,460 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_3eac5ff6-cfde-4f76-99b0-27fb7c077281/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-20 10:46:33,472 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_3eac5ff6-cfde-4f76-99b0-27fb7c077281/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-20 10:46:33,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:46:33,505 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:46:33,605 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_3eac5ff6-cfde-4f76-99b0-27fb7c077281/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-20 10:46:33,609 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_3eac5ff6-cfde-4f76-99b0-27fb7c077281/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-20 10:46:33,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:46:33,706 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:46:33,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33 WrapperNode [2022-11-20 10:46:33,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:46:33,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:46:33,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:46:33,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:46:33,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,789 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2022-11-20 10:46:33,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:46:33,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:46:33,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:46:33,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:46:33,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:46:33,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:46:33,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:46:33,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:46:33,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (1/1) ... [2022-11-20 10:46:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:46:33,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:33,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:46:33,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:46:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 10:46:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 10:46:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 10:46:33,968 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 10:46:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:46:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:46:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:46:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:46:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 10:46:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:46:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:46:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:46:33,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:46:33,977 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 10:46:34,233 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:46:34,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:46:34,755 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:46:34,765 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:46:34,765 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:46:34,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:34 BoogieIcfgContainer [2022-11-20 10:46:34,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:46:34,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:46:34,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:46:34,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:46:34,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:46:32" (1/3) ... [2022-11-20 10:46:34,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f044bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:34, skipping insertion in model container [2022-11-20 10:46:34,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:33" (2/3) ... [2022-11-20 10:46:34,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f044bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:34, skipping insertion in model container [2022-11-20 10:46:34,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:34" (3/3) ... [2022-11-20 10:46:34,777 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2022-11-20 10:46:34,787 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:46:34,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:46:34,798 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 10:46:34,798 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:46:34,979 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:46:35,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 229 transitions, 474 flow [2022-11-20 10:46:35,159 INFO L130 PetriNetUnfolder]: 13/227 cut-off events. [2022-11-20 10:46:35,160 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:46:35,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 227 events. 13/227 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 367 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2022-11-20 10:46:35,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 229 transitions, 474 flow [2022-11-20 10:46:35,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 217 transitions, 443 flow [2022-11-20 10:46:35,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:46:35,192 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;@ba5999e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:46:35,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 10:46:35,210 INFO L130 PetriNetUnfolder]: 1/62 cut-off events. [2022-11-20 10:46:35,210 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:46:35,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:35,211 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] [2022-11-20 10:46:35,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1859650148, now seen corresponding path program 1 times [2022-11-20 10:46:35,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:35,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200750719] [2022-11-20 10:46:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:35,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:35,555 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 10:46:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:35,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200750719] [2022-11-20 10:46:35,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200750719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:46:35,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:46:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:46:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716476483] [2022-11-20 10:46:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:46:35,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:46:35,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:35,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:46:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:46:35,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 229 [2022-11-20 10:46:35,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 217 transitions, 443 flow. Second operand has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 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 10:46:35,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:35,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 229 [2022-11-20 10:46:35,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:35,723 INFO L130 PetriNetUnfolder]: 9/208 cut-off events. [2022-11-20 10:46:35,723 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 10:46:35,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 208 events. 9/208 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 276 event pairs, 0 based on Foata normal form. 5/203 useless extension candidates. Maximal degree in co-relation 143. Up to 4 conditions per place. [2022-11-20 10:46:35,728 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 3 selfloop transitions, 0 changer transitions 0/208 dead transitions. [2022-11-20 10:46:35,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 208 transitions, 431 flow [2022-11-20 10:46:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:46:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:46:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 443 transitions. [2022-11-20 10:46:35,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9672489082969432 [2022-11-20 10:46:35,746 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 443 transitions. [2022-11-20 10:46:35,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 443 transitions. [2022-11-20 10:46:35,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:35,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 443 transitions. [2022-11-20 10:46:35,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 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 10:46:35,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 10:46:35,766 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 10:46:35,769 INFO L175 Difference]: Start difference. First operand has 211 places, 217 transitions, 443 flow. Second operand 2 states and 443 transitions. [2022-11-20 10:46:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 208 transitions, 431 flow [2022-11-20 10:46:35,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:46:35,782 INFO L231 Difference]: Finished difference. Result has 204 places, 208 transitions, 420 flow [2022-11-20 10:46:35,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=420, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-11-20 10:46:35,792 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -7 predicate places. [2022-11-20 10:46:35,793 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 420 flow [2022-11-20 10:46:35,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 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 10:46:35,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:35,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:46:35,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1551671927, now seen corresponding path program 1 times [2022-11-20 10:46:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:35,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49522297] [2022-11-20 10:46:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:37,194 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 10:46:37,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49522297] [2022-11-20 10:46:37,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49522297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:46:37,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:46:37,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 10:46:37,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829468993] [2022-11-20 10:46:37,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:46:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:46:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:46:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:46:37,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 229 [2022-11-20 10:46:37,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 420 flow. Second operand has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 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 10:46:37,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:37,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 229 [2022-11-20 10:46:37,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:38,567 INFO L130 PetriNetUnfolder]: 611/2580 cut-off events. [2022-11-20 10:46:38,567 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-20 10:46:38,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3512 conditions, 2580 events. 611/2580 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 20510 event pairs, 459 based on Foata normal form. 0/2409 useless extension candidates. Maximal degree in co-relation 3509. Up to 882 conditions per place. [2022-11-20 10:46:38,599 INFO L137 encePairwiseOnDemand]: 216/229 looper letters, 42 selfloop transitions, 12 changer transitions 0/204 dead transitions. [2022-11-20 10:46:38,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 520 flow [2022-11-20 10:46:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:46:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:46:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2187 transitions. [2022-11-20 10:46:38,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7346321800470272 [2022-11-20 10:46:38,667 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2187 transitions. [2022-11-20 10:46:38,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2187 transitions. [2022-11-20 10:46:38,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:38,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2187 transitions. [2022-11-20 10:46:38,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.23076923076923) internal successors, (2187), 13 states have internal predecessors, (2187), 0 states have call successors, (0), 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 10:46:38,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 0 states have call successors, (0), 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 10:46:38,695 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 0 states have call successors, (0), 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 10:46:38,695 INFO L175 Difference]: Start difference. First operand has 204 places, 208 transitions, 420 flow. Second operand 13 states and 2187 transitions. [2022-11-20 10:46:38,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 520 flow [2022-11-20 10:46:38,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 204 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:46:38,708 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 436 flow [2022-11-20 10:46:38,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=436, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2022-11-20 10:46:38,709 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 2 predicate places. [2022-11-20 10:46:38,709 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 436 flow [2022-11-20 10:46:38,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 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 10:46:38,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:38,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:38,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:46:38,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash 63645862, now seen corresponding path program 1 times [2022-11-20 10:46:38,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:38,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021070666] [2022-11-20 10:46:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:38,960 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 10:46:38,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:38,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021070666] [2022-11-20 10:46:38,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021070666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:46:38,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:46:38,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:46:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509954534] [2022-11-20 10:46:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:46:38,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:46:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:46:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:46:38,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 229 [2022-11-20 10:46:38,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 10:46:38,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:38,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 229 [2022-11-20 10:46:38,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:39,036 INFO L130 PetriNetUnfolder]: 16/305 cut-off events. [2022-11-20 10:46:39,037 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 10:46:39,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 305 events. 16/305 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 690 event pairs, 2 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 344. Up to 12 conditions per place. [2022-11-20 10:46:39,039 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 7 selfloop transitions, 2 changer transitions 5/207 dead transitions. [2022-11-20 10:46:39,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 207 transitions, 469 flow [2022-11-20 10:46:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:46:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:46:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-20 10:46:39,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-20 10:46:39,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-20 10:46:39,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-20 10:46:39,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:39,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-20 10:46:39,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 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 10:46:39,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 10:46:39,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 10:46:39,049 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 436 flow. Second operand 3 states and 649 transitions. [2022-11-20 10:46:39,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 207 transitions, 469 flow [2022-11-20 10:46:39,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 207 transitions, 446 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-20 10:46:39,055 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 415 flow [2022-11-20 10:46:39,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-20 10:46:39,057 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-20 10:46:39,057 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 415 flow [2022-11-20 10:46:39,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 10:46:39,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:39,058 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:39,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:46:39,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1324891375, now seen corresponding path program 1 times [2022-11-20 10:46:39,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490679884] [2022-11-20 10:46:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:39,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:39,166 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 10:46:39,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:39,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490679884] [2022-11-20 10:46:39,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490679884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:46:39,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:46:39,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:46:39,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86984720] [2022-11-20 10:46:39,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:46:39,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:46:39,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:39,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:46:39,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:46:39,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 229 [2022-11-20 10:46:39,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 415 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 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 10:46:39,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:39,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 229 [2022-11-20 10:46:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:39,253 INFO L130 PetriNetUnfolder]: 20/334 cut-off events. [2022-11-20 10:46:39,253 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:46:39,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 334 events. 20/334 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 674 event pairs, 6 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 399. Up to 24 conditions per place. [2022-11-20 10:46:39,255 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 13 selfloop transitions, 2 changer transitions 1/206 dead transitions. [2022-11-20 10:46:39,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 206 transitions, 457 flow [2022-11-20 10:46:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:46:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:46:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-20 10:46:39,258 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-20 10:46:39,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-20 10:46:39,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-20 10:46:39,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:39,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-20 10:46:39,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 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 10:46:39,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 10:46:39,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 10:46:39,345 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 415 flow. Second operand 3 states and 649 transitions. [2022-11-20 10:46:39,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 206 transitions, 457 flow [2022-11-20 10:46:39,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:46:39,350 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 421 flow [2022-11-20 10:46:39,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-20 10:46:39,352 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-20 10:46:39,352 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 421 flow [2022-11-20 10:46:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 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 10:46:39,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:39,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:46:39,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash -637897097, now seen corresponding path program 1 times [2022-11-20 10:46:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:39,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442305152] [2022-11-20 10:46:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:39,547 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 10:46:39,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442305152] [2022-11-20 10:46:39,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442305152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35927067] [2022-11-20 10:46:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:39,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:39,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:46:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:46:39,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:39,947 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 10:46:39,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:40,058 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 10:46:40,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35927067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:40,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:40,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:46:40,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269137678] [2022-11-20 10:46:40,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:40,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:46:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:46:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:46:40,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-20 10:46:40,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 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 10:46:40,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:40,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-20 10:46:40,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:40,250 INFO L130 PetriNetUnfolder]: 30/421 cut-off events. [2022-11-20 10:46:40,250 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 10:46:40,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 421 events. 30/421 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 696 event pairs, 4 based on Foata normal form. 4/414 useless extension candidates. Maximal degree in co-relation 535. Up to 19 conditions per place. [2022-11-20 10:46:40,254 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 20 selfloop transitions, 9 changer transitions 0/218 dead transitions. [2022-11-20 10:46:40,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 218 transitions, 529 flow [2022-11-20 10:46:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:46:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:46:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1921 transitions. [2022-11-20 10:46:40,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9320718098010674 [2022-11-20 10:46:40,283 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1921 transitions. [2022-11-20 10:46:40,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1921 transitions. [2022-11-20 10:46:40,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:40,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1921 transitions. [2022-11-20 10:46:40,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 213.44444444444446) internal successors, (1921), 9 states have internal predecessors, (1921), 0 states have call successors, (0), 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 10:46:40,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 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 10:46:40,297 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 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 10:46:40,297 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 421 flow. Second operand 9 states and 1921 transitions. [2022-11-20 10:46:40,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 218 transitions, 529 flow [2022-11-20 10:46:40,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 218 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:46:40,304 INFO L231 Difference]: Finished difference. Result has 214 places, 207 transitions, 469 flow [2022-11-20 10:46:40,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=214, PETRI_TRANSITIONS=207} [2022-11-20 10:46:40,308 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 3 predicate places. [2022-11-20 10:46:40,308 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 207 transitions, 469 flow [2022-11-20 10:46:40,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 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 10:46:40,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:40,313 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:40,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:40,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:40,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:40,527 INFO L85 PathProgramCache]: Analyzing trace with hash -579238025, now seen corresponding path program 2 times [2022-11-20 10:46:40,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:40,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200981416] [2022-11-20 10:46:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:40,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-20 10:46:40,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:40,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200981416] [2022-11-20 10:46:40,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200981416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:46:40,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:46:40,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:46:40,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324249334] [2022-11-20 10:46:40,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:46:40,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:46:40,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:46:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:46:40,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 229 [2022-11-20 10:46:40,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 207 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 10:46:40,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:40,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 229 [2022-11-20 10:46:40,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:40,941 INFO L130 PetriNetUnfolder]: 25/609 cut-off events. [2022-11-20 10:46:40,942 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 10:46:40,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 609 events. 25/609 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1307 event pairs, 3 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 723. Up to 19 conditions per place. [2022-11-20 10:46:40,945 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 12 selfloop transitions, 3 changer transitions 3/209 dead transitions. [2022-11-20 10:46:40,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 209 transitions, 508 flow [2022-11-20 10:46:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:46:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:46:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-11-20 10:46:40,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9301310043668122 [2022-11-20 10:46:40,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-11-20 10:46:40,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-11-20 10:46:40,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:40,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-11-20 10:46:40,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 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 10:46:40,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 10:46:40,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 10:46:40,954 INFO L175 Difference]: Start difference. First operand has 214 places, 207 transitions, 469 flow. Second operand 3 states and 639 transitions. [2022-11-20 10:46:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 209 transitions, 508 flow [2022-11-20 10:46:40,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 209 transitions, 502 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 10:46:40,960 INFO L231 Difference]: Finished difference. Result has 215 places, 204 transitions, 463 flow [2022-11-20 10:46:40,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=215, PETRI_TRANSITIONS=204} [2022-11-20 10:46:40,962 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 4 predicate places. [2022-11-20 10:46:40,962 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 204 transitions, 463 flow [2022-11-20 10:46:40,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 10:46:40,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:40,963 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:40,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:46:40,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1192919075, now seen corresponding path program 1 times [2022-11-20 10:46:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:40,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312810738] [2022-11-20 10:46:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:40,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:41,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312810738] [2022-11-20 10:46:41,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312810738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418436002] [2022-11-20 10:46:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:41,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:41,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:41,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:46:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:46:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:41,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:42,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418436002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:42,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:42,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 10:46:42,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797883109] [2022-11-20 10:46:42,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:46:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:42,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:46:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:46:42,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-20 10:46:42,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 204 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 0 states have call successors, (0), 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 10:46:42,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:42,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-20 10:46:42,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:42,695 INFO L130 PetriNetUnfolder]: 58/745 cut-off events. [2022-11-20 10:46:42,695 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-20 10:46:42,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 745 events. 58/745 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1387 event pairs, 4 based on Foata normal form. 8/734 useless extension candidates. Maximal degree in co-relation 1045. Up to 39 conditions per place. [2022-11-20 10:46:42,700 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 40 selfloop transitions, 21 changer transitions 1/247 dead transitions. [2022-11-20 10:46:42,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 247 transitions, 761 flow [2022-11-20 10:46:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:46:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 10:46:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4475 transitions. [2022-11-20 10:46:42,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9305468912455812 [2022-11-20 10:46:42,710 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4475 transitions. [2022-11-20 10:46:42,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4475 transitions. [2022-11-20 10:46:42,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:42,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4475 transitions. [2022-11-20 10:46:42,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 213.0952380952381) internal successors, (4475), 21 states have internal predecessors, (4475), 0 states have call successors, (0), 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 10:46:42,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 0 states have call successors, (0), 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 10:46:42,735 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 0 states have call successors, (0), 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 10:46:42,736 INFO L175 Difference]: Start difference. First operand has 215 places, 204 transitions, 463 flow. Second operand 21 states and 4475 transitions. [2022-11-20 10:46:42,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 247 transitions, 761 flow [2022-11-20 10:46:42,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 247 transitions, 758 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:46:42,743 INFO L231 Difference]: Finished difference. Result has 236 places, 216 transitions, 588 flow [2022-11-20 10:46:42,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=588, PETRI_PLACES=236, PETRI_TRANSITIONS=216} [2022-11-20 10:46:42,744 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 25 predicate places. [2022-11-20 10:46:42,745 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 216 transitions, 588 flow [2022-11-20 10:46:42,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 0 states have call successors, (0), 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 10:46:42,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:42,747 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:42,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:42,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:46:42,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:42,954 INFO L85 PathProgramCache]: Analyzing trace with hash -387971235, now seen corresponding path program 2 times [2022-11-20 10:46:42,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:42,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577639718] [2022-11-20 10:46:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:42,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:43,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577639718] [2022-11-20 10:46:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577639718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:43,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965595313] [2022-11-20 10:46:43,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:46:43,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:43,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:43,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:43,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:46:44,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:46:44,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:46:44,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:44,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:45,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965595313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:45,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:45,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 10:46:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996791982] [2022-11-20 10:46:45,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:45,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:46:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:46:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:46:45,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-20 10:46:45,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 216 transitions, 588 flow. Second operand has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 0 states have call successors, (0), 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 10:46:45,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:45,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-20 10:46:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:46,727 INFO L130 PetriNetUnfolder]: 114/1391 cut-off events. [2022-11-20 10:46:46,727 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-20 10:46:46,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1391 events. 114/1391 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2837 event pairs, 4 based on Foata normal form. 16/1372 useless extension candidates. Maximal degree in co-relation 2153. Up to 79 conditions per place. [2022-11-20 10:46:46,737 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 80 selfloop transitions, 45 changer transitions 0/310 dead transitions. [2022-11-20 10:46:46,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 310 transitions, 1326 flow [2022-11-20 10:46:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 10:46:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 10:46:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 9583 transitions. [2022-11-20 10:46:46,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9299369238233867 [2022-11-20 10:46:46,757 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 9583 transitions. [2022-11-20 10:46:46,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 9583 transitions. [2022-11-20 10:46:46,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:46,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 9583 transitions. [2022-11-20 10:46:46,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 212.95555555555555) internal successors, (9583), 45 states have internal predecessors, (9583), 0 states have call successors, (0), 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 10:46:46,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 0 states have call successors, (0), 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 10:46:46,867 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 0 states have call successors, (0), 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 10:46:46,867 INFO L175 Difference]: Start difference. First operand has 236 places, 216 transitions, 588 flow. Second operand 45 states and 9583 transitions. [2022-11-20 10:46:46,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 310 transitions, 1326 flow [2022-11-20 10:46:46,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 310 transitions, 1286 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 10:46:46,880 INFO L231 Difference]: Finished difference. Result has 282 places, 241 transitions, 866 flow [2022-11-20 10:46:46,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=866, PETRI_PLACES=282, PETRI_TRANSITIONS=241} [2022-11-20 10:46:46,883 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 71 predicate places. [2022-11-20 10:46:46,883 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 241 transitions, 866 flow [2022-11-20 10:46:46,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 0 states have call successors, (0), 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 10:46:46,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:46,886 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:46:46,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:47,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:47,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:46:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash 925531131, now seen corresponding path program 3 times [2022-11-20 10:46:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:47,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32181532] [2022-11-20 10:46:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:47,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 0 proven. 3270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:50,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32181532] [2022-11-20 10:46:50,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32181532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329463052] [2022-11-20 10:46:50,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:46:50,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:50,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:50,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:50,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:46:50,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:46:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:50,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 10:46:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:54,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:46:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:46:54,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 10:46:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:46:55,009 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-20 10:46:55,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-20 10:46:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:46:55,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 10:46:55,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:46:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 455 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2022-11-20 10:46:55,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:56,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:46:56,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2022-11-20 10:46:56,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:46:56,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 83 [2022-11-20 10:46:56,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2022-11-20 10:46:56,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-20 10:46:56,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:46:56,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2022-11-20 10:46:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 455 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2022-11-20 10:46:57,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329463052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:57,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:57,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14, 13] total 56 [2022-11-20 10:46:57,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638119100] [2022-11-20 10:46:57,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:57,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 10:46:57,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 10:46:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2694, Unknown=3, NotChecked=0, Total=3080 [2022-11-20 10:46:57,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 229 [2022-11-20 10:46:57,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 241 transitions, 866 flow. Second operand has 56 states, 56 states have (on average 164.60714285714286) internal successors, (9218), 56 states have internal predecessors, (9218), 0 states have call successors, (0), 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 10:46:57,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:57,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 229 [2022-11-20 10:46:57,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:17,501 INFO L130 PetriNetUnfolder]: 2125/7556 cut-off events. [2022-11-20 10:47:17,502 INFO L131 PetriNetUnfolder]: For 2826/2826 co-relation queries the response was YES. [2022-11-20 10:47:17,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 7556 events. 2125/7556 cut-off events. For 2826/2826 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 39973 event pairs, 33 based on Foata normal form. 8/7464 useless extension candidates. Maximal degree in co-relation 15794. Up to 687 conditions per place. [2022-11-20 10:47:17,575 INFO L137 encePairwiseOnDemand]: 205/229 looper letters, 888 selfloop transitions, 408 changer transitions 0/1428 dead transitions. [2022-11-20 10:47:17,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1428 transitions, 6868 flow [2022-11-20 10:47:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-20 10:47:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2022-11-20 10:47:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 32887 transitions. [2022-11-20 10:47:17,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7144843468248279 [2022-11-20 10:47:17,623 INFO L72 ComplementDD]: Start complementDD. Operand 201 states and 32887 transitions. [2022-11-20 10:47:17,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 201 states and 32887 transitions. [2022-11-20 10:47:17,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:17,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 201 states and 32887 transitions. [2022-11-20 10:47:17,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 202 states, 201 states have (on average 163.61691542288557) internal successors, (32887), 201 states have internal predecessors, (32887), 0 states have call successors, (0), 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 10:47:17,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 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 10:47:17,791 INFO L81 ComplementDD]: Finished complementDD. Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 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 10:47:17,791 INFO L175 Difference]: Start difference. First operand has 282 places, 241 transitions, 866 flow. Second operand 201 states and 32887 transitions. [2022-11-20 10:47:17,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1428 transitions, 6868 flow [2022-11-20 10:47:17,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1428 transitions, 6753 flow, removed 22 selfloop flow, removed 18 redundant places. [2022-11-20 10:47:17,829 INFO L231 Difference]: Finished difference. Result has 548 places, 680 transitions, 3716 flow [2022-11-20 10:47:17,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=201, PETRI_FLOW=3716, PETRI_PLACES=548, PETRI_TRANSITIONS=680} [2022-11-20 10:47:17,830 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 337 predicate places. [2022-11-20 10:47:17,831 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 680 transitions, 3716 flow [2022-11-20 10:47:17,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 164.60714285714286) internal successors, (9218), 56 states have internal predecessors, (9218), 0 states have call successors, (0), 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 10:47:17,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:17,834 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:47:17,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:18,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:18,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:47:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash -104989988, now seen corresponding path program 1 times [2022-11-20 10:47:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:18,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315414893] [2022-11-20 10:47:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:18,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315414893] [2022-11-20 10:47:20,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315414893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293116720] [2022-11-20 10:47:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:20,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:20,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:20,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:20,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:47:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:47:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:22,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:24,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293116720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:24,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:47:24,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2022-11-20 10:47:24,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744776703] [2022-11-20 10:47:24,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:24,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 10:47:24,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 10:47:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 10:47:24,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-20 10:47:24,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 680 transitions, 3716 flow. Second operand has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 0 states have call successors, (0), 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 10:47:24,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:24,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-20 10:47:24,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:33,437 INFO L130 PetriNetUnfolder]: 960/8286 cut-off events. [2022-11-20 10:47:33,438 INFO L131 PetriNetUnfolder]: For 129248/129280 co-relation queries the response was YES. [2022-11-20 10:47:33,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28566 conditions, 8286 events. 960/8286 cut-off events. For 129248/129280 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 37677 event pairs, 7 based on Foata normal form. 102/8380 useless extension candidates. Maximal degree in co-relation 28458. Up to 590 conditions per place. [2022-11-20 10:47:33,547 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 170 selfloop transitions, 162 changer transitions 0/905 dead transitions. [2022-11-20 10:47:33,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 905 transitions, 6052 flow [2022-11-20 10:47:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-20 10:47:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-20 10:47:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 21076 transitions. [2022-11-20 10:47:33,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9296458030082484 [2022-11-20 10:47:33,583 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 21076 transitions. [2022-11-20 10:47:33,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 21076 transitions. [2022-11-20 10:47:33,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:33,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 21076 transitions. [2022-11-20 10:47:33,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 212.88888888888889) internal successors, (21076), 99 states have internal predecessors, (21076), 0 states have call successors, (0), 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 10:47:33,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 0 states have call successors, (0), 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 10:47:33,729 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 0 states have call successors, (0), 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 10:47:33,729 INFO L175 Difference]: Start difference. First operand has 548 places, 680 transitions, 3716 flow. Second operand 99 states and 21076 transitions. [2022-11-20 10:47:33,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 905 transitions, 6052 flow [2022-11-20 10:47:34,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 905 transitions, 5866 flow, removed 4 selfloop flow, removed 48 redundant places. [2022-11-20 10:47:34,225 INFO L231 Difference]: Finished difference. Result has 616 places, 747 transitions, 4800 flow [2022-11-20 10:47:34,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=4800, PETRI_PLACES=616, PETRI_TRANSITIONS=747} [2022-11-20 10:47:34,227 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 405 predicate places. [2022-11-20 10:47:34,227 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 747 transitions, 4800 flow [2022-11-20 10:47:34,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 0 states have call successors, (0), 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 10:47:34,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:34,230 INFO L209 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:47:34,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:34,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:47:34,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:47:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash -946801939, now seen corresponding path program 2 times [2022-11-20 10:47:34,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:34,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769138095] [2022-11-20 10:47:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:34,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:44,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769138095] [2022-11-20 10:47:44,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769138095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:44,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448859141] [2022-11-20 10:47:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:47:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:44,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:44,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:47:44,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:47:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:47:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 10:47:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:46,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:52,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448859141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:52,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:47:52,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 138 [2022-11-20 10:47:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834024837] [2022-11-20 10:47:52,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-20 10:47:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-20 10:47:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4830, Invalid=14076, Unknown=0, NotChecked=0, Total=18906 [2022-11-20 10:47:52,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-20 10:47:52,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 747 transitions, 4800 flow. Second operand has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 0 states have call successors, (0), 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 10:47:52,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:52,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-20 10:47:52,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:48:25,544 INFO L130 PetriNetUnfolder]: 1878/16582 cut-off events. [2022-11-20 10:48:25,544 INFO L131 PetriNetUnfolder]: For 356323/356389 co-relation queries the response was YES. [2022-11-20 10:48:25,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59841 conditions, 16582 events. 1878/16582 cut-off events. For 356323/356389 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 76244 event pairs, 7 based on Foata normal form. 204/16778 useless extension candidates. Maximal degree in co-relation 59716. Up to 1474 conditions per place. [2022-11-20 10:48:25,891 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 340 selfloop transitions, 298 changer transitions 0/1211 dead transitions. [2022-11-20 10:48:25,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 1211 transitions, 10180 flow [2022-11-20 10:48:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-20 10:48:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2022-11-20 10:48:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 42785 transitions. [2022-11-20 10:48:25,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.929522692215777 [2022-11-20 10:48:25,937 INFO L72 ComplementDD]: Start complementDD. Operand 201 states and 42785 transitions. [2022-11-20 10:48:25,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 201 states and 42785 transitions. [2022-11-20 10:48:25,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:48:25,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 201 states and 42785 transitions. [2022-11-20 10:48:26,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 202 states, 201 states have (on average 212.86069651741295) internal successors, (42785), 201 states have internal predecessors, (42785), 0 states have call successors, (0), 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 10:48:26,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 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 10:48:26,076 INFO L81 ComplementDD]: Finished complementDD. Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 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 10:48:26,077 INFO L175 Difference]: Start difference. First operand has 616 places, 747 transitions, 4800 flow. Second operand 201 states and 42785 transitions. [2022-11-20 10:48:26,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 1211 transitions, 10180 flow [2022-11-20 10:48:27,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 1211 transitions, 9683 flow, removed 156 selfloop flow, removed 47 redundant places. [2022-11-20 10:48:27,243 INFO L231 Difference]: Finished difference. Result has 804 places, 884 transitions, 7241 flow [2022-11-20 10:48:27,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=201, PETRI_FLOW=7241, PETRI_PLACES=804, PETRI_TRANSITIONS=884} [2022-11-20 10:48:27,244 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 593 predicate places. [2022-11-20 10:48:27,244 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 884 transitions, 7241 flow [2022-11-20 10:48:27,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 0 states have call successors, (0), 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 10:48:27,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:48:27,248 INFO L209 CegarLoopForPetriNet]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:27,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:27,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:48:27,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:48:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash -389632542, now seen corresponding path program 3 times [2022-11-20 10:48:27,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:27,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068905463] [2022-11-20 10:48:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:27,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:49:08,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:08,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068905463] [2022-11-20 10:49:08,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068905463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911775576] [2022-11-20 10:49:08,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:49:08,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:08,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:08,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:08,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3eac5ff6-cfde-4f76-99b0-27fb7c077281/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:49:08,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:49:08,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 10:49:08,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:41,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:49:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:49:42,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 10:49:42,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:49:42,540 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-20 10:49:42,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-20 10:49:42,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:49:42,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 10:49:42,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-11-20 10:49:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:49:43,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 10:49:43,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:49:43,720 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-20 10:49:43,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-20 10:49:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:49:43,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 10:49:43,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 10:49:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 4139 proven. 1521 refuted. 0 times theorem prover too weak. 62816 trivial. 0 not checked. [2022-11-20 10:49:43,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:44,984 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1))) (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1)))))) is different from false [2022-11-20 10:49:45,060 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) (+ 1 |c_t1Thread1of1ForFork0_enqueue_#t~post41#1|))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1))) (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1)))))) is different from false [2022-11-20 10:49:45,074 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1))) (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1)))))) is different from false [2022-11-20 10:49:45,090 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1)))))) is different from false [2022-11-20 10:49:45,164 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse3 (+ (select .cse2 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1)))))) is different from false [2022-11-20 10:49:45,218 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2807)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse3 (+ (select .cse2 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1)))))) is different from false [2022-11-20 10:49:45,247 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| Int)) (let ((.cse1 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604)) (.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| (select .cse0 .cse1))) (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse4 (store .cse0 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2807))) (store (store .cse4 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse1 (+ (select .cse4 .cse1) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse3 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse2 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse3))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse2 .cse3))))))))) is different from false [2022-11-20 10:49:45,297 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset| 1604)) (.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_#in~q#1.base|))) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_#in~q#1.base| (let ((.cse4 (store .cse2 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| 4) |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset|) v_ArrVal_2807))) (store (store .cse4 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset|) v_ArrVal_2809) .cse3 (+ (select .cse4 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| (select .cse2 .cse3))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1))))))) is different from false [2022-11-20 10:49:46,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:49:46,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 149 [2022-11-20 10:49:46,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:49:46,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 273 [2022-11-20 10:49:46,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 237 [2022-11-20 10:49:46,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 263 [2022-11-20 10:49:46,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-20 10:49:46,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:49:46,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 89 [2022-11-20 10:49:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 2653 proven. 1501 refuted. 0 times theorem prover too weak. 62816 trivial. 1506 not checked. [2022-11-20 10:49:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911775576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:52,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:52,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 19, 22] total 174 [2022-11-20 10:49:52,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103313621] [2022-11-20 10:49:52,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-11-20 10:49:52,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-11-20 10:49:52,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4953, Invalid=22456, Unknown=13, NotChecked=2680, Total=30102 [2022-11-20 10:49:52,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 229 [2022-11-20 10:49:52,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 884 transitions, 7241 flow. Second operand has 174 states, 174 states have (on average 163.59195402298852) internal successors, (28465), 174 states have internal predecessors, (28465), 0 states have call successors, (0), 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 10:49:52,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:49:52,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 229 [2022-11-20 10:49:52,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand