./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R --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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- 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-38b53e6 [2022-11-25 17:41:24,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:41:24,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:41:24,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:41:24,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:41:24,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:41:24,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:41:24,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:41:24,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:41:24,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:41:24,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:41:24,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:41:24,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:41:24,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:41:24,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:41:24,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:41:24,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:41:24,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:41:24,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:41:24,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:41:24,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:41:24,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:41:24,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:41:24,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:41:24,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:41:24,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:41:24,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:41:24,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:41:24,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:41:24,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:41:24,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:41:24,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:41:24,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:41:24,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:41:24,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:41:24,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:41:24,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:41:24,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:41:24,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:41:24,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:41:24,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:41:24,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:41:24,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:41:24,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:41:24,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:41:24,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:41:24,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:41:24,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:41:24,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:41:24,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:41:24,826 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:41:24,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:41:24,827 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:41:24,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:41:24,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:41:24,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:41:24,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:41:24,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:41:24,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:41:24,829 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:41:24,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:41:24,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:41:24,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:41:24,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:41:24,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:41:24,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:41:24,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:41:24,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:41:24,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:41:24,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:41:24,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:41:24,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:41:24,833 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:41:24,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:41:24,833 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:41:24,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:41:24,834 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2022-11-25 17:41:25,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:41:25,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:41:25,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:41:25,149 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:41:25,149 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:41:25,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/queue_longer.i [2022-11-25 17:41:28,411 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:41:28,757 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:41:28,763 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/sv-benchmarks/c/pthread/queue_longer.i [2022-11-25 17:41:28,792 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/data/7938019f3/d619ef38c2dd49b98f0984420051499d/FLAGcbd505e25 [2022-11-25 17:41:28,812 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/data/7938019f3/d619ef38c2dd49b98f0984420051499d [2022-11-25 17:41:28,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:41:28,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:41:28,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:41:28,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:41:28,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:41:28,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:41:28" (1/1) ... [2022-11-25 17:41:28,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40cce367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:28, skipping insertion in model container [2022-11-25 17:41:28,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:41:28" (1/1) ... [2022-11-25 17:41:28,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:41:28,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:41:29,519 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_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-11-25 17:41:29,533 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_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-11-25 17:41:29,540 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_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-11-25 17:41:29,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:41:29,567 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:41:29,650 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_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-11-25 17:41:29,654 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_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-11-25 17:41:29,662 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_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-11-25 17:41:29,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:41:29,752 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:41:29,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29 WrapperNode [2022-11-25 17:41:29,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:41:29,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:41:29,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:41:29,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:41:29,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,821 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 241 [2022-11-25 17:41:29,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:41:29,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:41:29,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:41:29,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:41:29,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,872 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:41:29,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:41:29,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:41:29,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:41:29,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (1/1) ... [2022-11-25 17:41:29,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:41:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:29,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:41:29,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7ed0d0-3dfd-48a3-a324-c5f643ba607f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:41:29,984 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 17:41:29,984 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 17:41:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 17:41:29,985 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 17:41:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:41:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:41:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:41:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:41:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:41:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:41:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:41:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:41:29,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:41:29,989 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:41:30,265 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:41:30,267 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:41:30,828 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:41:30,840 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:41:30,840 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:41:30,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:41:30 BoogieIcfgContainer [2022-11-25 17:41:30,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:41:30,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:41:30,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:41:30,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:41:30,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:41:28" (1/3) ... [2022-11-25 17:41:30,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720cc38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:41:30, skipping insertion in model container [2022-11-25 17:41:30,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:29" (2/3) ... [2022-11-25 17:41:30,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720cc38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:41:30, skipping insertion in model container [2022-11-25 17:41:30,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:41:30" (3/3) ... [2022-11-25 17:41:30,866 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2022-11-25 17:41:30,875 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:41:30,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:41:30,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-25 17:41:30,893 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:41:31,109 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:41:31,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 272 transitions, 560 flow [2022-11-25 17:41:31,275 INFO L130 PetriNetUnfolder]: 15/270 cut-off events. [2022-11-25 17:41:31,276 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:41:31,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 270 events. 15/270 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 361 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-11-25 17:41:31,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 272 transitions, 560 flow [2022-11-25 17:41:31,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 260 transitions, 529 flow [2022-11-25 17:41:31,305 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:41:31,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 260 transitions, 529 flow [2022-11-25 17:41:31,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 260 transitions, 529 flow [2022-11-25 17:41:31,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 260 transitions, 529 flow [2022-11-25 17:41:31,393 INFO L130 PetriNetUnfolder]: 15/260 cut-off events. [2022-11-25 17:41:31,393 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:41:31,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 260 events. 15/260 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 325 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-11-25 17:41:31,405 INFO L119 LiptonReduction]: Number of co-enabled transitions 16892 [2022-11-25 17:41:42,827 INFO L134 LiptonReduction]: Checked pairs total: 36570 [2022-11-25 17:41:42,827 INFO L136 LiptonReduction]: Total number of compositions: 239 [2022-11-25 17:41:42,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:41:42,851 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;@1baf9f9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:41:42,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:41:42,855 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:41:42,855 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:41:42,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:42,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:41:42,857 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 4 more)] === [2022-11-25 17:41:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1060, now seen corresponding path program 1 times [2022-11-25 17:41:42,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480780777] [2022-11-25 17:41:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:42,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480780777] [2022-11-25 17:41:42,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480780777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:42,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:42,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:41:43,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244519657] [2022-11-25 17:41:43,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:41:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:41:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:41:43,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 511 [2022-11-25 17:41:43,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 135 flow. Second operand has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:43,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:43,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 511 [2022-11-25 17:41:43,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:43,491 INFO L130 PetriNetUnfolder]: 1557/2594 cut-off events. [2022-11-25 17:41:43,491 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-25 17:41:43,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5074 conditions, 2594 events. 1557/2594 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11785 event pairs, 1245 based on Foata normal form. 34/2205 useless extension candidates. Maximal degree in co-relation 4916. Up to 2407 conditions per place. [2022-11-25 17:41:43,511 INFO L137 encePairwiseOnDemand]: 508/511 looper letters, 53 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2022-11-25 17:41:43,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 235 flow [2022-11-25 17:41:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:41:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:41:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 574 transitions. [2022-11-25 17:41:43,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2022-11-25 17:41:43,540 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 574 transitions. [2022-11-25 17:41:43,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 574 transitions. [2022-11-25 17:41:43,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:43,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 574 transitions. [2022-11-25 17:41:43,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 287.0) internal successors, (574), 2 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:43,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 511.0) internal successors, (1533), 3 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:43,568 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 511.0) internal successors, (1533), 3 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:43,570 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 135 flow. Second operand 2 states and 574 transitions. [2022-11-25 17:41:43,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 235 flow [2022-11-25 17:41:43,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 230 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:41:43,580 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 124 flow [2022-11-25 17:41:43,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2022-11-25 17:41:43,587 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2022-11-25 17:41:43,589 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 124 flow [2022-11-25 17:41:43,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:43,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:43,590 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:43,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:41:43,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:41:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1751738711, now seen corresponding path program 1 times [2022-11-25 17:41:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447179728] [2022-11-25 17:41:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:43,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:43,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447179728] [2022-11-25 17:41:43,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447179728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:43,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:43,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:41:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122411551] [2022-11-25 17:41:43,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:43,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:41:43,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:41:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:41:43,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 511 [2022-11-25 17:41:43,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:43,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:43,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 511 [2022-11-25 17:41:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:44,307 INFO L130 PetriNetUnfolder]: 1521/2564 cut-off events. [2022-11-25 17:41:44,308 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:41:44,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4992 conditions, 2564 events. 1521/2564 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11869 event pairs, 1197 based on Foata normal form. 0/2175 useless extension candidates. Maximal degree in co-relation 4989. Up to 2253 conditions per place. [2022-11-25 17:41:44,322 INFO L137 encePairwiseOnDemand]: 507/511 looper letters, 69 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2022-11-25 17:41:44,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 308 flow [2022-11-25 17:41:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:41:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:41:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2022-11-25 17:41:44,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5446836268754077 [2022-11-25 17:41:44,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2022-11-25 17:41:44,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2022-11-25 17:41:44,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:44,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2022-11-25 17:41:44,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:44,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:44,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:44,335 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 124 flow. Second operand 3 states and 835 transitions. [2022-11-25 17:41:44,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 308 flow [2022-11-25 17:41:44,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:41:44,338 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 128 flow [2022-11-25 17:41:44,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2022-11-25 17:41:44,339 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2022-11-25 17:41:44,339 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 128 flow [2022-11-25 17:41:44,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:44,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:44,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:44,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:41:44,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:41:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash 207090339, now seen corresponding path program 1 times [2022-11-25 17:41:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:44,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756208296] [2022-11-25 17:41:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:44,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:45,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:45,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756208296] [2022-11-25 17:41:45,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756208296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:45,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:45,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:41:45,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230243107] [2022-11-25 17:41:45,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:45,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:41:45,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:45,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:41:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:41:47,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 511 [2022-11-25 17:41:47,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:47,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:47,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 511 [2022-11-25 17:41:47,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:48,295 INFO L130 PetriNetUnfolder]: 1621/2701 cut-off events. [2022-11-25 17:41:48,295 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 17:41:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5404 conditions, 2701 events. 1621/2701 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 12261 event pairs, 1218 based on Foata normal form. 0/2300 useless extension candidates. Maximal degree in co-relation 5400. Up to 2533 conditions per place. [2022-11-25 17:41:48,314 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 56 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2022-11-25 17:41:48,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 290 flow [2022-11-25 17:41:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:41:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:41:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1699 transitions. [2022-11-25 17:41:48,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.474979032708974 [2022-11-25 17:41:48,320 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1699 transitions. [2022-11-25 17:41:48,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1699 transitions. [2022-11-25 17:41:48,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:48,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1699 transitions. [2022-11-25 17:41:48,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 242.71428571428572) internal successors, (1699), 7 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 511.0) internal successors, (4088), 8 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,336 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 511.0) internal successors, (4088), 8 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,337 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 128 flow. Second operand 7 states and 1699 transitions. [2022-11-25 17:41:48,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 290 flow [2022-11-25 17:41:48,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:41:48,343 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 193 flow [2022-11-25 17:41:48,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2022-11-25 17:41:48,346 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 8 predicate places. [2022-11-25 17:41:48,346 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 193 flow [2022-11-25 17:41:48,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:48,348 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:48,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:41:48,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:41:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash 604714609, now seen corresponding path program 1 times [2022-11-25 17:41:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893404764] [2022-11-25 17:41:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:48,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893404764] [2022-11-25 17:41:48,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893404764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:48,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:48,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:41:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520266908] [2022-11-25 17:41:48,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:41:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:41:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:41:48,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 511 [2022-11-25 17:41:48,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:48,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 511 [2022-11-25 17:41:48,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:48,845 INFO L130 PetriNetUnfolder]: 1285/2228 cut-off events. [2022-11-25 17:41:48,846 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-25 17:41:48,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4538 conditions, 2228 events. 1285/2228 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 9074 event pairs, 635 based on Foata normal form. 54/1904 useless extension candidates. Maximal degree in co-relation 4529. Up to 1239 conditions per place. [2022-11-25 17:41:48,863 INFO L137 encePairwiseOnDemand]: 507/511 looper letters, 83 selfloop transitions, 3 changer transitions 1/94 dead transitions. [2022-11-25 17:41:48,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 422 flow [2022-11-25 17:41:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:41:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:41:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2022-11-25 17:41:48,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.548597521200261 [2022-11-25 17:41:48,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2022-11-25 17:41:48,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2022-11-25 17:41:48,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:48,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2022-11-25 17:41:48,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,878 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 193 flow. Second operand 3 states and 841 transitions. [2022-11-25 17:41:48,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 422 flow [2022-11-25 17:41:48,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:41:48,884 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 208 flow [2022-11-25 17:41:48,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2022-11-25 17:41:48,886 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2022-11-25 17:41:48,886 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 208 flow [2022-11-25 17:41:48,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:48,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:48,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:41:48,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:41:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash -355830749, now seen corresponding path program 1 times [2022-11-25 17:41:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:48,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670515287] [2022-11-25 17:41:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:49,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:49,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670515287] [2022-11-25 17:41:49,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670515287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:49,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:49,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:41:49,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933951998] [2022-11-25 17:41:49,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:49,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:41:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:41:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:41:50,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 511 [2022-11-25 17:41:50,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 232.85714285714286) internal successors, (1630), 7 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:50,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:50,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 511 [2022-11-25 17:41:50,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:50,856 INFO L130 PetriNetUnfolder]: 1336/2273 cut-off events. [2022-11-25 17:41:50,856 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2022-11-25 17:41:50,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4733 conditions, 2273 events. 1336/2273 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8983 event pairs, 312 based on Foata normal form. 11/1900 useless extension candidates. Maximal degree in co-relation 4722. Up to 1928 conditions per place. [2022-11-25 17:41:50,869 INFO L137 encePairwiseOnDemand]: 505/511 looper letters, 81 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-11-25 17:41:50,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 446 flow [2022-11-25 17:41:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:41:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:41:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1471 transitions. [2022-11-25 17:41:50,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.479778212654925 [2022-11-25 17:41:50,874 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1471 transitions. [2022-11-25 17:41:50,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1471 transitions. [2022-11-25 17:41:50,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:50,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1471 transitions. [2022-11-25 17:41:50,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 245.16666666666666) internal successors, (1471), 6 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:50,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 511.0) internal successors, (3577), 7 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:50,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 511.0) internal successors, (3577), 7 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:50,888 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 208 flow. Second operand 6 states and 1471 transitions. [2022-11-25 17:41:50,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 446 flow [2022-11-25 17:41:50,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:41:50,896 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 217 flow [2022-11-25 17:41:50,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2022-11-25 17:41:50,900 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 14 predicate places. [2022-11-25 17:41:50,900 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 217 flow [2022-11-25 17:41:50,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 232.85714285714286) internal successors, (1630), 7 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:50,902 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:50,902 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:50,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:41:50,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:41:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash 602114641, now seen corresponding path program 1 times [2022-11-25 17:41:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162812099] [2022-11-25 17:41:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:52,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162812099] [2022-11-25 17:41:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162812099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:52,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:52,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:41:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450531387] [2022-11-25 17:41:52,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:41:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:41:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:41:53,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 511 [2022-11-25 17:41:53,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 217 flow. Second operand has 11 states, 11 states have (on average 219.1818181818182) internal successors, (2411), 11 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:53,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:53,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 511 [2022-11-25 17:41:53,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:53,930 INFO L130 PetriNetUnfolder]: 1335/2270 cut-off events. [2022-11-25 17:41:53,931 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-11-25 17:41:53,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4762 conditions, 2270 events. 1335/2270 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8907 event pairs, 1041 based on Foata normal form. 0/1887 useless extension candidates. Maximal degree in co-relation 4751. Up to 2129 conditions per place. [2022-11-25 17:41:53,948 INFO L137 encePairwiseOnDemand]: 500/511 looper letters, 60 selfloop transitions, 17 changer transitions 1/84 dead transitions. [2022-11-25 17:41:53,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 412 flow [2022-11-25 17:41:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:41:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:41:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2040 transitions. [2022-11-25 17:41:53,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4435746901500326 [2022-11-25 17:41:53,954 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2040 transitions. [2022-11-25 17:41:53,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2040 transitions. [2022-11-25 17:41:53,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:53,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2040 transitions. [2022-11-25 17:41:53,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 226.66666666666666) internal successors, (2040), 9 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:53,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:53,972 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:53,972 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 217 flow. Second operand 9 states and 2040 transitions. [2022-11-25 17:41:53,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 412 flow [2022-11-25 17:41:53,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 394 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-25 17:41:53,976 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 277 flow [2022-11-25 17:41:53,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=277, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-11-25 17:41:53,979 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2022-11-25 17:41:53,979 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 277 flow [2022-11-25 17:41:53,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 219.1818181818182) internal successors, (2411), 11 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:53,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:53,982 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:53,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:41:53,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:41:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:53,983 INFO L85 PathProgramCache]: Analyzing trace with hash 331430097, now seen corresponding path program 1 times [2022-11-25 17:41:53,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:53,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124810971] [2022-11-25 17:41:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:53,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124810971] [2022-11-25 17:41:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124810971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:55,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:55,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:41:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170468485] [2022-11-25 17:41:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:41:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:41:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:41:56,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 511 [2022-11-25 17:41:56,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 216.16666666666666) internal successors, (2594), 12 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:56,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:56,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 511 [2022-11-25 17:41:56,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:57,885 INFO L130 PetriNetUnfolder]: 1500/2538 cut-off events. [2022-11-25 17:41:57,886 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-11-25 17:41:57,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5464 conditions, 2538 events. 1500/2538 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 10443 event pairs, 380 based on Foata normal form. 0/2093 useless extension candidates. Maximal degree in co-relation 5450. Up to 1916 conditions per place. [2022-11-25 17:41:57,908 INFO L137 encePairwiseOnDemand]: 500/511 looper letters, 101 selfloop transitions, 19 changer transitions 10/136 dead transitions. [2022-11-25 17:41:57,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 680 flow [2022-11-25 17:41:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:41:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:41:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2056 transitions. [2022-11-25 17:41:57,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4470537073276799 [2022-11-25 17:41:57,916 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2056 transitions. [2022-11-25 17:41:57,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2056 transitions. [2022-11-25 17:41:57,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:57,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2056 transitions. [2022-11-25 17:41:57,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.44444444444446) internal successors, (2056), 9 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,930 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,931 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 277 flow. Second operand 9 states and 2056 transitions. [2022-11-25 17:41:57,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 680 flow [2022-11-25 17:41:57,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 652 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-25 17:41:57,940 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 321 flow [2022-11-25 17:41:57,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2022-11-25 17:41:57,941 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2022-11-25 17:41:57,941 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 321 flow [2022-11-25 17:41:57,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 216.16666666666666) internal successors, (2594), 12 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:57,943 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:57,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:41:57,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:41:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:57,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1485466135, now seen corresponding path program 2 times [2022-11-25 17:41:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:57,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928092378] [2022-11-25 17:41:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:57,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:59,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:59,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928092378] [2022-11-25 17:41:59,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928092378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:59,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:59,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:41:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880456953] [2022-11-25 17:41:59,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:59,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:41:59,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:41:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:42:00,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 511 [2022-11-25 17:42:00,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 321 flow. Second operand has 12 states, 12 states have (on average 216.16666666666666) internal successors, (2594), 12 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:00,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 511 [2022-11-25 17:42:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:01,502 INFO L130 PetriNetUnfolder]: 1573/2689 cut-off events. [2022-11-25 17:42:01,502 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2022-11-25 17:42:01,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5972 conditions, 2689 events. 1573/2689 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 11453 event pairs, 488 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 5956. Up to 1722 conditions per place. [2022-11-25 17:42:01,528 INFO L137 encePairwiseOnDemand]: 500/511 looper letters, 100 selfloop transitions, 21 changer transitions 9/136 dead transitions. [2022-11-25 17:42:01,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 136 transitions, 720 flow [2022-11-25 17:42:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:42:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:42:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2053 transitions. [2022-11-25 17:42:01,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44640139160687103 [2022-11-25 17:42:01,534 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2053 transitions. [2022-11-25 17:42:01,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2053 transitions. [2022-11-25 17:42:01,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:01,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2053 transitions. [2022-11-25 17:42:01,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.11111111111111) internal successors, (2053), 9 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,567 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,567 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 321 flow. Second operand 9 states and 2053 transitions. [2022-11-25 17:42:01,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 136 transitions, 720 flow [2022-11-25 17:42:01,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 684 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-25 17:42:01,573 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 364 flow [2022-11-25 17:42:01,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=364, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2022-11-25 17:42:01,575 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 29 predicate places. [2022-11-25 17:42:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 364 flow [2022-11-25 17:42:01,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 216.16666666666666) internal successors, (2594), 12 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:01,577 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:42:01,577 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1485667945, now seen corresponding path program 3 times [2022-11-25 17:42:01,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:01,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007754146] [2022-11-25 17:42:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:01,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:02,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007754146] [2022-11-25 17:42:02,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007754146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:02,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:02,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:42:02,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119155000] [2022-11-25 17:42:02,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:42:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:42:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:42:04,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 511 [2022-11-25 17:42:04,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 364 flow. Second operand has 12 states, 12 states have (on average 216.16666666666666) internal successors, (2594), 12 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:04,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:04,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 511 [2022-11-25 17:42:04,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:05,217 INFO L130 PetriNetUnfolder]: 1557/2651 cut-off events. [2022-11-25 17:42:05,217 INFO L131 PetriNetUnfolder]: For 575/575 co-relation queries the response was YES. [2022-11-25 17:42:05,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5983 conditions, 2651 events. 1557/2651 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 11143 event pairs, 456 based on Foata normal form. 0/2181 useless extension candidates. Maximal degree in co-relation 5965. Up to 1722 conditions per place. [2022-11-25 17:42:05,236 INFO L137 encePairwiseOnDemand]: 501/511 looper letters, 98 selfloop transitions, 21 changer transitions 10/134 dead transitions. [2022-11-25 17:42:05,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 134 transitions, 741 flow [2022-11-25 17:42:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:42:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:42:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2051 transitions. [2022-11-25 17:42:05,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4459665144596651 [2022-11-25 17:42:05,242 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2051 transitions. [2022-11-25 17:42:05,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2051 transitions. [2022-11-25 17:42:05,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:05,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2051 transitions. [2022-11-25 17:42:05,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.88888888888889) internal successors, (2051), 9 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,256 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 511.0) internal successors, (5110), 10 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,256 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 364 flow. Second operand 9 states and 2051 transitions. [2022-11-25 17:42:05,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 134 transitions, 741 flow [2022-11-25 17:42:05,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 134 transitions, 714 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-25 17:42:05,264 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 371 flow [2022-11-25 17:42:05,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=371, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2022-11-25 17:42:05,265 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 29 predicate places. [2022-11-25 17:42:05,265 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 371 flow [2022-11-25 17:42:05,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 216.16666666666666) internal successors, (2594), 12 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:05,267 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] [2022-11-25 17:42:05,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:42:05,267 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1272527829, now seen corresponding path program 1 times [2022-11-25 17:42:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:05,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424238263] [2022-11-25 17:42:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:05,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:05,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424238263] [2022-11-25 17:42:05,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424238263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:05,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:05,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:42:05,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104403827] [2022-11-25 17:42:05,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:05,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:42:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:42:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:42:05,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 511 [2022-11-25 17:42:05,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:05,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 511 [2022-11-25 17:42:05,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:05,704 INFO L130 PetriNetUnfolder]: 728/1355 cut-off events. [2022-11-25 17:42:05,705 INFO L131 PetriNetUnfolder]: For 432/432 co-relation queries the response was YES. [2022-11-25 17:42:05,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3204 conditions, 1355 events. 728/1355 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5440 event pairs, 192 based on Foata normal form. 4/1203 useless extension candidates. Maximal degree in co-relation 3186. Up to 1018 conditions per place. [2022-11-25 17:42:05,712 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 68 selfloop transitions, 9 changer transitions 1/88 dead transitions. [2022-11-25 17:42:05,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 557 flow [2022-11-25 17:42:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:42:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:42:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2022-11-25 17:42:05,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.532941943900848 [2022-11-25 17:42:05,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2022-11-25 17:42:05,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2022-11-25 17:42:05,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:05,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2022-11-25 17:42:05,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,722 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 371 flow. Second operand 3 states and 817 transitions. [2022-11-25 17:42:05,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 557 flow [2022-11-25 17:42:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 515 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-25 17:42:05,727 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 347 flow [2022-11-25 17:42:05,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2022-11-25 17:42:05,729 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 23 predicate places. [2022-11-25 17:42:05,729 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 347 flow [2022-11-25 17:42:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:05,730 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] [2022-11-25 17:42:05,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:42:05,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:05,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1695808849, now seen corresponding path program 1 times [2022-11-25 17:42:05,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:05,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887329993] [2022-11-25 17:42:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:07,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887329993] [2022-11-25 17:42:07,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887329993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:07,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:07,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:42:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616776255] [2022-11-25 17:42:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:42:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:42:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:42:08,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 511 [2022-11-25 17:42:08,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 347 flow. Second operand has 14 states, 14 states have (on average 220.35714285714286) internal successors, (3085), 14 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:08,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:08,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 511 [2022-11-25 17:42:08,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:09,529 INFO L130 PetriNetUnfolder]: 764/1429 cut-off events. [2022-11-25 17:42:09,529 INFO L131 PetriNetUnfolder]: For 338/338 co-relation queries the response was YES. [2022-11-25 17:42:09,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3484 conditions, 1429 events. 764/1429 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5741 event pairs, 438 based on Foata normal form. 0/1337 useless extension candidates. Maximal degree in co-relation 3466. Up to 941 conditions per place. [2022-11-25 17:42:09,536 INFO L137 encePairwiseOnDemand]: 498/511 looper letters, 99 selfloop transitions, 24 changer transitions 15/143 dead transitions. [2022-11-25 17:42:09,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 143 transitions, 811 flow [2022-11-25 17:42:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:42:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:42:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2741 transitions. [2022-11-25 17:42:09,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4469993476842792 [2022-11-25 17:42:09,544 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2741 transitions. [2022-11-25 17:42:09,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2741 transitions. [2022-11-25 17:42:09,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:09,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2741 transitions. [2022-11-25 17:42:09,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 228.41666666666666) internal successors, (2741), 12 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:09,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:09,563 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:09,564 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 347 flow. Second operand 12 states and 2741 transitions. [2022-11-25 17:42:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 143 transitions, 811 flow [2022-11-25 17:42:09,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 143 transitions, 793 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:42:09,570 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 451 flow [2022-11-25 17:42:09,570 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=451, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2022-11-25 17:42:09,571 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 37 predicate places. [2022-11-25 17:42:09,571 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 451 flow [2022-11-25 17:42:09,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 220.35714285714286) internal successors, (3085), 14 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:09,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:09,572 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] [2022-11-25 17:42:09,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:42:09,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash -74666175, now seen corresponding path program 2 times [2022-11-25 17:42:09,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:09,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677317317] [2022-11-25 17:42:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:09,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:11,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677317317] [2022-11-25 17:42:11,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677317317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:11,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:11,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:42:11,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442553241] [2022-11-25 17:42:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:42:11,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:42:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:42:12,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 511 [2022-11-25 17:42:12,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 451 flow. Second operand has 14 states, 14 states have (on average 224.35714285714286) internal successors, (3141), 14 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:12,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:12,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 511 [2022-11-25 17:42:12,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:13,154 INFO L130 PetriNetUnfolder]: 1027/1920 cut-off events. [2022-11-25 17:42:13,154 INFO L131 PetriNetUnfolder]: For 518/518 co-relation queries the response was YES. [2022-11-25 17:42:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 1920 events. 1027/1920 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 8580 event pairs, 177 based on Foata normal form. 14/1842 useless extension candidates. Maximal degree in co-relation 4676. Up to 761 conditions per place. [2022-11-25 17:42:13,165 INFO L137 encePairwiseOnDemand]: 495/511 looper letters, 114 selfloop transitions, 29 changer transitions 11/159 dead transitions. [2022-11-25 17:42:13,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 159 transitions, 952 flow [2022-11-25 17:42:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:42:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:42:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2799 transitions. [2022-11-25 17:42:13,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45645792563600784 [2022-11-25 17:42:13,173 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2799 transitions. [2022-11-25 17:42:13,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2799 transitions. [2022-11-25 17:42:13,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:13,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2799 transitions. [2022-11-25 17:42:13,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 233.25) internal successors, (2799), 12 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:13,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:13,193 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:13,193 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 451 flow. Second operand 12 states and 2799 transitions. [2022-11-25 17:42:13,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 159 transitions, 952 flow [2022-11-25 17:42:13,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 929 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-25 17:42:13,201 INFO L231 Difference]: Finished difference. Result has 106 places, 94 transitions, 549 flow [2022-11-25 17:42:13,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=549, PETRI_PLACES=106, PETRI_TRANSITIONS=94} [2022-11-25 17:42:13,202 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2022-11-25 17:42:13,202 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 94 transitions, 549 flow [2022-11-25 17:42:13,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 224.35714285714286) internal successors, (3141), 14 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:13,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:13,203 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] [2022-11-25 17:42:13,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:42:13,204 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash 315855837, now seen corresponding path program 3 times [2022-11-25 17:42:13,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:13,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370719341] [2022-11-25 17:42:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:15,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:15,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370719341] [2022-11-25 17:42:15,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370719341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:15,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:15,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:42:15,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529712531] [2022-11-25 17:42:15,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:15,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:42:15,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:15,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:42:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:42:16,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 511 [2022-11-25 17:42:16,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 94 transitions, 549 flow. Second operand has 14 states, 14 states have (on average 224.35714285714286) internal successors, (3141), 14 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:16,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:16,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 511 [2022-11-25 17:42:16,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:18,349 INFO L130 PetriNetUnfolder]: 1067/1996 cut-off events. [2022-11-25 17:42:18,350 INFO L131 PetriNetUnfolder]: For 966/966 co-relation queries the response was YES. [2022-11-25 17:42:18,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5241 conditions, 1996 events. 1067/1996 cut-off events. For 966/966 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 9050 event pairs, 187 based on Foata normal form. 7/1911 useless extension candidates. Maximal degree in co-relation 5214. Up to 747 conditions per place. [2022-11-25 17:42:18,366 INFO L137 encePairwiseOnDemand]: 495/511 looper letters, 118 selfloop transitions, 30 changer transitions 12/165 dead transitions. [2022-11-25 17:42:18,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 165 transitions, 1063 flow [2022-11-25 17:42:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:42:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:42:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3024 transitions. [2022-11-25 17:42:18,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45521601685985247 [2022-11-25 17:42:18,375 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3024 transitions. [2022-11-25 17:42:18,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3024 transitions. [2022-11-25 17:42:18,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:18,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3024 transitions. [2022-11-25 17:42:18,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 232.6153846153846) internal successors, (3024), 13 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:18,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:18,424 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:18,424 INFO L175 Difference]: Start difference. First operand has 106 places, 94 transitions, 549 flow. Second operand 13 states and 3024 transitions. [2022-11-25 17:42:18,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 165 transitions, 1063 flow [2022-11-25 17:42:18,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 165 transitions, 1029 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-25 17:42:18,436 INFO L231 Difference]: Finished difference. Result has 114 places, 97 transitions, 621 flow [2022-11-25 17:42:18,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=621, PETRI_PLACES=114, PETRI_TRANSITIONS=97} [2022-11-25 17:42:18,437 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 54 predicate places. [2022-11-25 17:42:18,438 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 97 transitions, 621 flow [2022-11-25 17:42:18,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 224.35714285714286) internal successors, (3141), 14 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:18,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:18,439 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] [2022-11-25 17:42:18,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:42:18,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash 96380127, now seen corresponding path program 4 times [2022-11-25 17:42:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:18,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245785686] [2022-11-25 17:42:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:19,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245785686] [2022-11-25 17:42:19,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245785686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:19,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:19,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:42:19,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808170858] [2022-11-25 17:42:19,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:19,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:42:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:19,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:42:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:42:20,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 511 [2022-11-25 17:42:20,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 97 transitions, 621 flow. Second operand has 14 states, 14 states have (on average 224.35714285714286) internal successors, (3141), 14 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:20,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:20,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 511 [2022-11-25 17:42:20,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:21,756 INFO L130 PetriNetUnfolder]: 893/1677 cut-off events. [2022-11-25 17:42:21,756 INFO L131 PetriNetUnfolder]: For 1434/1434 co-relation queries the response was YES. [2022-11-25 17:42:21,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 1677 events. 893/1677 cut-off events. For 1434/1434 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7049 event pairs, 200 based on Foata normal form. 14/1614 useless extension candidates. Maximal degree in co-relation 4637. Up to 694 conditions per place. [2022-11-25 17:42:21,778 INFO L137 encePairwiseOnDemand]: 499/511 looper letters, 106 selfloop transitions, 26 changer transitions 15/152 dead transitions. [2022-11-25 17:42:21,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 152 transitions, 1056 flow [2022-11-25 17:42:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:42:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:42:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2785 transitions. [2022-11-25 17:42:21,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45417482061317677 [2022-11-25 17:42:21,797 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2785 transitions. [2022-11-25 17:42:21,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2785 transitions. [2022-11-25 17:42:21,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:21,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2785 transitions. [2022-11-25 17:42:21,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 232.08333333333334) internal successors, (2785), 12 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:21,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:21,825 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:21,826 INFO L175 Difference]: Start difference. First operand has 114 places, 97 transitions, 621 flow. Second operand 12 states and 2785 transitions. [2022-11-25 17:42:21,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 152 transitions, 1056 flow [2022-11-25 17:42:21,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 152 transitions, 1005 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-25 17:42:21,836 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 634 flow [2022-11-25 17:42:21,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=634, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2022-11-25 17:42:21,837 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 56 predicate places. [2022-11-25 17:42:21,838 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 634 flow [2022-11-25 17:42:21,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 224.35714285714286) internal successors, (3141), 14 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:21,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:21,839 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] [2022-11-25 17:42:21,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:42:21,839 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash 25606778, now seen corresponding path program 1 times [2022-11-25 17:42:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:21,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208727584] [2022-11-25 17:42:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:24,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208727584] [2022-11-25 17:42:24,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208727584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:24,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:24,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-25 17:42:24,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033382446] [2022-11-25 17:42:24,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:24,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:42:24,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:42:24,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:42:25,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 511 [2022-11-25 17:42:25,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 634 flow. Second operand has 16 states, 16 states have (on average 222.125) internal successors, (3554), 16 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:25,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:25,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 511 [2022-11-25 17:42:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:27,003 INFO L130 PetriNetUnfolder]: 1045/1968 cut-off events. [2022-11-25 17:42:27,004 INFO L131 PetriNetUnfolder]: For 1797/1797 co-relation queries the response was YES. [2022-11-25 17:42:27,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5350 conditions, 1968 events. 1045/1968 cut-off events. For 1797/1797 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 8682 event pairs, 470 based on Foata normal form. 0/1875 useless extension candidates. Maximal degree in co-relation 5319. Up to 1200 conditions per place. [2022-11-25 17:42:27,021 INFO L137 encePairwiseOnDemand]: 495/511 looper letters, 132 selfloop transitions, 28 changer transitions 14/179 dead transitions. [2022-11-25 17:42:27,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 179 transitions, 1192 flow [2022-11-25 17:42:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:42:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:42:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3009 transitions. [2022-11-25 17:42:27,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45295800090320637 [2022-11-25 17:42:27,028 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3009 transitions. [2022-11-25 17:42:27,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3009 transitions. [2022-11-25 17:42:27,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:27,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3009 transitions. [2022-11-25 17:42:27,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 231.46153846153845) internal successors, (3009), 13 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:27,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:27,046 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:27,046 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 634 flow. Second operand 13 states and 3009 transitions. [2022-11-25 17:42:27,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 179 transitions, 1192 flow [2022-11-25 17:42:27,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 179 transitions, 1143 flow, removed 5 selfloop flow, removed 9 redundant places. [2022-11-25 17:42:27,057 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 677 flow [2022-11-25 17:42:27,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=677, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2022-11-25 17:42:27,058 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2022-11-25 17:42:27,058 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 677 flow [2022-11-25 17:42:27,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 222.125) internal successors, (3554), 16 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:27,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:27,060 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] [2022-11-25 17:42:27,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:42:27,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:27,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2036724942, now seen corresponding path program 2 times [2022-11-25 17:42:27,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:27,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873373189] [2022-11-25 17:42:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:29,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873373189] [2022-11-25 17:42:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873373189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:29,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:29,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-25 17:42:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454171981] [2022-11-25 17:42:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:42:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:42:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:42:30,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 511 [2022-11-25 17:42:30,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 677 flow. Second operand has 16 states, 16 states have (on average 222.125) internal successors, (3554), 16 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:30,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:30,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 511 [2022-11-25 17:42:30,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:31,925 INFO L130 PetriNetUnfolder]: 1208/2257 cut-off events. [2022-11-25 17:42:31,925 INFO L131 PetriNetUnfolder]: For 1941/1941 co-relation queries the response was YES. [2022-11-25 17:42:31,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6064 conditions, 2257 events. 1208/2257 cut-off events. For 1941/1941 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10453 event pairs, 378 based on Foata normal form. 8/2162 useless extension candidates. Maximal degree in co-relation 6030. Up to 715 conditions per place. [2022-11-25 17:42:31,941 INFO L137 encePairwiseOnDemand]: 495/511 looper letters, 130 selfloop transitions, 33 changer transitions 14/182 dead transitions. [2022-11-25 17:42:31,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 1242 flow [2022-11-25 17:42:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:42:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:42:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3005 transitions. [2022-11-25 17:42:31,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4523558633147674 [2022-11-25 17:42:31,949 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3005 transitions. [2022-11-25 17:42:31,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3005 transitions. [2022-11-25 17:42:31,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:31,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3005 transitions. [2022-11-25 17:42:31,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 231.15384615384616) internal successors, (3005), 13 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:31,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:31,966 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:31,967 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 677 flow. Second operand 13 states and 3005 transitions. [2022-11-25 17:42:31,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 1242 flow [2022-11-25 17:42:31,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 182 transitions, 1188 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-11-25 17:42:31,980 INFO L231 Difference]: Finished difference. Result has 128 places, 106 transitions, 737 flow [2022-11-25 17:42:31,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=737, PETRI_PLACES=128, PETRI_TRANSITIONS=106} [2022-11-25 17:42:31,981 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2022-11-25 17:42:31,981 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 106 transitions, 737 flow [2022-11-25 17:42:31,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 222.125) internal successors, (3554), 16 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:31,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:31,982 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] [2022-11-25 17:42:31,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:42:31,983 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1633352456, now seen corresponding path program 3 times [2022-11-25 17:42:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:31,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908701601] [2022-11-25 17:42:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:34,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:34,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908701601] [2022-11-25 17:42:34,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908701601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:34,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:34,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-25 17:42:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146181898] [2022-11-25 17:42:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:42:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:42:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:42:35,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 511 [2022-11-25 17:42:35,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 106 transitions, 737 flow. Second operand has 16 states, 16 states have (on average 222.125) internal successors, (3554), 16 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:35,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:35,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 511 [2022-11-25 17:42:35,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:36,322 INFO L130 PetriNetUnfolder]: 1346/2520 cut-off events. [2022-11-25 17:42:36,322 INFO L131 PetriNetUnfolder]: For 2667/2670 co-relation queries the response was YES. [2022-11-25 17:42:36,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 2520 events. 1346/2520 cut-off events. For 2667/2670 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11644 event pairs, 298 based on Foata normal form. 8/2408 useless extension candidates. Maximal degree in co-relation 6845. Up to 690 conditions per place. [2022-11-25 17:42:36,341 INFO L137 encePairwiseOnDemand]: 496/511 looper letters, 132 selfloop transitions, 36 changer transitions 13/186 dead transitions. [2022-11-25 17:42:36,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 186 transitions, 1318 flow [2022-11-25 17:42:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:42:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:42:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3005 transitions. [2022-11-25 17:42:36,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4523558633147674 [2022-11-25 17:42:36,348 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3005 transitions. [2022-11-25 17:42:36,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3005 transitions. [2022-11-25 17:42:36,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:36,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3005 transitions. [2022-11-25 17:42:36,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 231.15384615384616) internal successors, (3005), 13 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:36,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:36,362 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 511.0) internal successors, (7154), 14 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:36,362 INFO L175 Difference]: Start difference. First operand has 128 places, 106 transitions, 737 flow. Second operand 13 states and 3005 transitions. [2022-11-25 17:42:36,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 186 transitions, 1318 flow [2022-11-25 17:42:36,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 1258 flow, removed 6 selfloop flow, removed 9 redundant places. [2022-11-25 17:42:36,378 INFO L231 Difference]: Finished difference. Result has 134 places, 110 transitions, 810 flow [2022-11-25 17:42:36,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=810, PETRI_PLACES=134, PETRI_TRANSITIONS=110} [2022-11-25 17:42:36,379 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2022-11-25 17:42:36,380 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 110 transitions, 810 flow [2022-11-25 17:42:36,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 222.125) internal successors, (3554), 16 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:36,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:36,381 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] [2022-11-25 17:42:36,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:42:36,381 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -877505522, now seen corresponding path program 1 times [2022-11-25 17:42:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:36,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645270597] [2022-11-25 17:42:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:40,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645270597] [2022-11-25 17:42:40,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645270597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:40,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:40,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 17:42:40,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95440635] [2022-11-25 17:42:40,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:40,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:42:40,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:40,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:42:40,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:42:45,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 511 [2022-11-25 17:42:45,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 110 transitions, 810 flow. Second operand has 21 states, 21 states have (on average 196.66666666666666) internal successors, (4130), 21 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:45,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:45,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 511 [2022-11-25 17:42:45,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:48,350 INFO L130 PetriNetUnfolder]: 1536/2912 cut-off events. [2022-11-25 17:42:48,350 INFO L131 PetriNetUnfolder]: For 4085/4085 co-relation queries the response was YES. [2022-11-25 17:42:48,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 2912 events. 1536/2912 cut-off events. For 4085/4085 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 14178 event pairs, 751 based on Foata normal form. 74/2841 useless extension candidates. Maximal degree in co-relation 8145. Up to 2370 conditions per place. [2022-11-25 17:42:48,364 INFO L137 encePairwiseOnDemand]: 485/511 looper letters, 165 selfloop transitions, 40 changer transitions 31/241 dead transitions. [2022-11-25 17:42:48,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 241 transitions, 1818 flow [2022-11-25 17:42:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:42:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:42:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5660 transitions. [2022-11-25 17:42:48,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39558289069052277 [2022-11-25 17:42:48,379 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5660 transitions. [2022-11-25 17:42:48,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5660 transitions. [2022-11-25 17:42:48,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:48,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5660 transitions. [2022-11-25 17:42:48,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 202.14285714285714) internal successors, (5660), 28 states have internal predecessors, (5660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:48,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 511.0) internal successors, (14819), 29 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:48,404 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 511.0) internal successors, (14819), 29 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:48,404 INFO L175 Difference]: Start difference. First operand has 134 places, 110 transitions, 810 flow. Second operand 28 states and 5660 transitions. [2022-11-25 17:42:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 241 transitions, 1818 flow [2022-11-25 17:42:48,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 241 transitions, 1734 flow, removed 6 selfloop flow, removed 9 redundant places. [2022-11-25 17:42:48,430 INFO L231 Difference]: Finished difference. Result has 176 places, 148 transitions, 1241 flow [2022-11-25 17:42:48,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1241, PETRI_PLACES=176, PETRI_TRANSITIONS=148} [2022-11-25 17:42:48,431 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 116 predicate places. [2022-11-25 17:42:48,431 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 148 transitions, 1241 flow [2022-11-25 17:42:48,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.66666666666666) internal successors, (4130), 21 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:48,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:48,432 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] [2022-11-25 17:42:48,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:42:48,432 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:42:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:48,433 INFO L85 PathProgramCache]: Analyzing trace with hash 406872880, now seen corresponding path program 2 times [2022-11-25 17:42:48,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:48,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330703565] [2022-11-25 17:42:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:48,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:52,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330703565] [2022-11-25 17:42:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330703565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:52,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:52,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-25 17:42:52,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433486057] [2022-11-25 17:42:52,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:52,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:42:52,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:42:52,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:42:57,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 511 [2022-11-25 17:42:57,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 148 transitions, 1241 flow. Second operand has 21 states, 21 states have (on average 196.66666666666666) internal successors, (4130), 21 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:57,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:57,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 511 [2022-11-25 17:42:57,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:00,438 INFO L130 PetriNetUnfolder]: 1709/3259 cut-off events. [2022-11-25 17:43:00,438 INFO L131 PetriNetUnfolder]: For 44085/44085 co-relation queries the response was YES. [2022-11-25 17:43:00,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14635 conditions, 3259 events. 1709/3259 cut-off events. For 44085/44085 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 16591 event pairs, 709 based on Foata normal form. 66/3152 useless extension candidates. Maximal degree in co-relation 14571. Up to 2659 conditions per place. [2022-11-25 17:43:00,463 INFO L137 encePairwiseOnDemand]: 485/511 looper letters, 197 selfloop transitions, 46 changer transitions 32/280 dead transitions. [2022-11-25 17:43:00,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 280 transitions, 2628 flow [2022-11-25 17:43:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:43:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:43:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5660 transitions. [2022-11-25 17:43:00,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39558289069052277 [2022-11-25 17:43:00,475 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5660 transitions. [2022-11-25 17:43:00,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5660 transitions. [2022-11-25 17:43:00,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:00,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5660 transitions. [2022-11-25 17:43:00,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 202.14285714285714) internal successors, (5660), 28 states have internal predecessors, (5660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:00,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 511.0) internal successors, (14819), 29 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:00,500 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 511.0) internal successors, (14819), 29 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:00,500 INFO L175 Difference]: Start difference. First operand has 176 places, 148 transitions, 1241 flow. Second operand 28 states and 5660 transitions. [2022-11-25 17:43:00,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 280 transitions, 2628 flow [2022-11-25 17:43:00,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 2606 flow, removed 11 selfloop flow, removed 0 redundant places. [2022-11-25 17:43:00,574 INFO L231 Difference]: Finished difference. Result has 224 places, 184 transitions, 1808 flow [2022-11-25 17:43:00,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1808, PETRI_PLACES=224, PETRI_TRANSITIONS=184} [2022-11-25 17:43:00,575 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 164 predicate places. [2022-11-25 17:43:00,575 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 184 transitions, 1808 flow [2022-11-25 17:43:00,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.66666666666666) internal successors, (4130), 21 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:00,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:00,576 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] [2022-11-25 17:43:00,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:43:00,577 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:43:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:00,577 INFO L85 PathProgramCache]: Analyzing trace with hash -689658514, now seen corresponding path program 3 times [2022-11-25 17:43:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:00,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33400683] [2022-11-25 17:43:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:00,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:03,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33400683] [2022-11-25 17:43:03,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33400683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:03,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:03,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-25 17:43:03,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194587172] [2022-11-25 17:43:03,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:03,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:43:03,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:43:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:43:08,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 511 [2022-11-25 17:43:08,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 184 transitions, 1808 flow. Second operand has 20 states, 20 states have (on average 197.75) internal successors, (3955), 20 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:08,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:08,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 511 [2022-11-25 17:43:08,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:11,856 INFO L130 PetriNetUnfolder]: 1898/3642 cut-off events. [2022-11-25 17:43:11,856 INFO L131 PetriNetUnfolder]: For 143642/143642 co-relation queries the response was YES. [2022-11-25 17:43:11,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21547 conditions, 3642 events. 1898/3642 cut-off events. For 143642/143642 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19301 event pairs, 746 based on Foata normal form. 64/3505 useless extension candidates. Maximal degree in co-relation 21459. Up to 2917 conditions per place. [2022-11-25 17:43:11,896 INFO L137 encePairwiseOnDemand]: 487/511 looper letters, 223 selfloop transitions, 54 changer transitions 31/313 dead transitions. [2022-11-25 17:43:11,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 313 transitions, 3641 flow [2022-11-25 17:43:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:43:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:43:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5691 transitions. [2022-11-25 17:43:11,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3977495107632094 [2022-11-25 17:43:11,905 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5691 transitions. [2022-11-25 17:43:11,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5691 transitions. [2022-11-25 17:43:11,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:11,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5691 transitions. [2022-11-25 17:43:11,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 203.25) internal successors, (5691), 28 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:11,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 511.0) internal successors, (14819), 29 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:11,930 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 511.0) internal successors, (14819), 29 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:11,930 INFO L175 Difference]: Start difference. First operand has 224 places, 184 transitions, 1808 flow. Second operand 28 states and 5691 transitions. [2022-11-25 17:43:11,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 313 transitions, 3641 flow [2022-11-25 17:43:12,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 313 transitions, 3527 flow, removed 55 selfloop flow, removed 1 redundant places. [2022-11-25 17:43:12,195 INFO L231 Difference]: Finished difference. Result has 267 places, 216 transitions, 2351 flow [2022-11-25 17:43:12,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2351, PETRI_PLACES=267, PETRI_TRANSITIONS=216} [2022-11-25 17:43:12,196 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 207 predicate places. [2022-11-25 17:43:12,196 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 216 transitions, 2351 flow [2022-11-25 17:43:12,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 197.75) internal successors, (3955), 20 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:12,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:12,197 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] [2022-11-25 17:43:12,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 17:43:12,198 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:43:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:12,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1318913540, now seen corresponding path program 4 times [2022-11-25 17:43:12,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:12,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332945447] [2022-11-25 17:43:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:12,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat