./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8 --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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --- 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-2329fc7 [2022-12-13 17:49:47,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:49:47,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:49:47,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:49:47,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:49:47,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:49:47,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:49:47,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:49:47,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:49:47,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:49:47,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:49:47,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:49:47,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:49:47,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:49:47,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:49:47,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:49:47,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:49:47,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:49:47,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:49:47,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:49:47,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:49:47,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:49:47,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:49:47,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:49:47,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:49:47,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:49:47,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:49:47,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:49:47,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:49:47,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:49:47,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:49:47,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:49:47,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:49:47,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:49:47,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:49:47,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:49:47,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:49:47,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:49:47,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:49:47,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:49:47,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:49:47,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:49:47,940 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:49:47,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:49:47,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:49:47,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:49:47,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:49:47,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:49:47,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:49:47,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:49:47,942 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:49:47,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:49:47,942 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:49:47,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:49:47,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:49:47,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:49:47,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:49:47,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:49:47,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:49:47,943 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:49:47,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:49:47,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:49:47,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:49:47,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:49:47,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:49:47,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:49:47,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:49:47,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:49:47,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:49:47,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:49:47,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:49:47,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:49:47,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:49:47,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:49:47,946 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:49:47,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:49:47,946 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:49:47,946 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_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc [2022-12-13 17:49:48,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:49:48,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:49:48,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:49:48,125 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:49:48,125 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:49:48,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-12-13 17:49:50,650 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:49:50,842 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:49:50,842 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-12-13 17:49:50,851 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/data/2e770e1bb/54f15bc10f3b4ba38fd71c0fbcf6f9bf/FLAGc3cefa269 [2022-12-13 17:49:51,221 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/data/2e770e1bb/54f15bc10f3b4ba38fd71c0fbcf6f9bf [2022-12-13 17:49:51,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:49:51,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:49:51,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:49:51,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:49:51,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:49:51,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2732246a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51, skipping insertion in model container [2022-12-13 17:49:51,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:49:51,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:49:51,600 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_69db1b8c-edcd-4274-96de-460c3251a9d9/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-12-13 17:49:51,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:49:51,627 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:49:51,663 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_69db1b8c-edcd-4274-96de-460c3251a9d9/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-12-13 17:49:51,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:49:51,718 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:49:51,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51 WrapperNode [2022-12-13 17:49:51,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:49:51,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:49:51,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:49:51,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:49:51,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,761 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-12-13 17:49:51,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:49:51,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:49:51,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:49:51,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:49:51,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:49:51,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:49:51,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:49:51,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:49:51,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (1/1) ... [2022-12-13 17:49:51,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:49:51,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:51,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:49:51,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 17:49:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:49:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:49:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:49:51,854 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:49:51,952 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:49:51,953 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:49:52,134 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:49:52,149 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:49:52,149 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 17:49:52,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:49:52 BoogieIcfgContainer [2022-12-13 17:49:52,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:49:52,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:49:52,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:49:52,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:49:52,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:49:51" (1/3) ... [2022-12-13 17:49:52,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8895c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:49:52, skipping insertion in model container [2022-12-13 17:49:52,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:51" (2/3) ... [2022-12-13 17:49:52,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8895c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:49:52, skipping insertion in model container [2022-12-13 17:49:52,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:49:52" (3/3) ... [2022-12-13 17:49:52,160 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2022-12-13 17:49:52,169 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:49:52,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:49:52,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:49:52,182 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:49:52,227 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 17:49:52,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 124 transitions, 256 flow [2022-12-13 17:49:52,300 INFO L130 PetriNetUnfolder]: 23/169 cut-off events. [2022-12-13 17:49:52,301 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:49:52,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 169 events. 23/169 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 384 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2022-12-13 17:49:52,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 124 transitions, 256 flow [2022-12-13 17:49:52,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 119 transitions, 243 flow [2022-12-13 17:49:52,312 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:49:52,320 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 119 transitions, 243 flow [2022-12-13 17:49:52,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 119 transitions, 243 flow [2022-12-13 17:49:52,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 119 transitions, 243 flow [2022-12-13 17:49:52,349 INFO L130 PetriNetUnfolder]: 22/164 cut-off events. [2022-12-13 17:49:52,349 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:49:52,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 164 events. 22/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 369 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2022-12-13 17:49:52,352 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2022-12-13 17:49:54,760 INFO L134 LiptonReduction]: Checked pairs total: 4601 [2022-12-13 17:49:54,760 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-12-13 17:49:54,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:49:54,774 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;@49824c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:49:54,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:49:54,777 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 17:49:54,777 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:49:54,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:54,778 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:49:54,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:49:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash 14741715, now seen corresponding path program 1 times [2022-12-13 17:49:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145973244] [2022-12-13 17:49:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:54,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145973244] [2022-12-13 17:49:54,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145973244] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:54,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:54,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:49:54,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531647420] [2022-12-13 17:49:54,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:54,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:54,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:54,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:54,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 231 [2022-12-13 17:49:54,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:54,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:54,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 231 [2022-12-13 17:49:55,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:55,077 INFO L130 PetriNetUnfolder]: 97/210 cut-off events. [2022-12-13 17:49:55,077 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:49:55,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 210 events. 97/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 740 event pairs, 70 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2022-12-13 17:49:55,080 INFO L137 encePairwiseOnDemand]: 219/231 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2022-12-13 17:49:55,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 133 flow [2022-12-13 17:49:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:49:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-12-13 17:49:55,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5266955266955267 [2022-12-13 17:49:55,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-12-13 17:49:55,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-12-13 17:49:55,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:55,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-12-13 17:49:55,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:55,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:55,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:55,112 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 365 transitions. [2022-12-13 17:49:55,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 133 flow [2022-12-13 17:49:55,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:49:55,116 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 47 flow [2022-12-13 17:49:55,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2022-12-13 17:49:55,119 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2022-12-13 17:49:55,119 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 47 flow [2022-12-13 17:49:55,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:55,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:55,120 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:49:55,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:49:55,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:49:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1256479246, now seen corresponding path program 1 times [2022-12-13 17:49:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248854362] [2022-12-13 17:49:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:55,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:49:55,159 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:49:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:49:55,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:49:55,196 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:49:55,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:49:55,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:49:55,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:49:55,199 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:49:55,201 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:49:55,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:49:55,219 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:49:55,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 154 transitions, 326 flow [2022-12-13 17:49:55,262 INFO L130 PetriNetUnfolder]: 40/269 cut-off events. [2022-12-13 17:49:55,262 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:49:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 269 events. 40/269 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 774 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 171. Up to 9 conditions per place. [2022-12-13 17:49:55,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 154 transitions, 326 flow [2022-12-13 17:49:55,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 154 transitions, 326 flow [2022-12-13 17:49:55,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:49:55,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 154 transitions, 326 flow [2022-12-13 17:49:55,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 154 transitions, 326 flow [2022-12-13 17:49:55,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 154 transitions, 326 flow [2022-12-13 17:49:55,285 INFO L130 PetriNetUnfolder]: 40/269 cut-off events. [2022-12-13 17:49:55,285 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:49:55,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 269 events. 40/269 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 774 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 171. Up to 9 conditions per place. [2022-12-13 17:49:55,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 7896 [2022-12-13 17:49:58,053 INFO L134 LiptonReduction]: Checked pairs total: 17797 [2022-12-13 17:49:58,053 INFO L136 LiptonReduction]: Total number of compositions: 121 [2022-12-13 17:49:58,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:49:58,055 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;@49824c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:49:58,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:49:58,057 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 17:49:58,057 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:49:58,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:58,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:49:58,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:49:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash 24130434, now seen corresponding path program 1 times [2022-12-13 17:49:58,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:58,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905526356] [2022-12-13 17:49:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:58,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:58,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905526356] [2022-12-13 17:49:58,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905526356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:58,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:58,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:49:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664298036] [2022-12-13 17:49:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:58,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:58,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 275 [2022-12-13 17:49:58,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:58,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 275 [2022-12-13 17:49:58,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:58,329 INFO L130 PetriNetUnfolder]: 1446/2588 cut-off events. [2022-12-13 17:49:58,330 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-13 17:49:58,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4976 conditions, 2588 events. 1446/2588 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15384 event pairs, 1124 based on Foata normal form. 281/2536 useless extension candidates. Maximal degree in co-relation 2557. Up to 2327 conditions per place. [2022-12-13 17:49:58,363 INFO L137 encePairwiseOnDemand]: 257/275 looper letters, 28 selfloop transitions, 2 changer transitions 11/51 dead transitions. [2022-12-13 17:49:58,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2022-12-13 17:49:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:49:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2022-12-13 17:49:58,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5406060606060606 [2022-12-13 17:49:58,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2022-12-13 17:49:58,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2022-12-13 17:49:58,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:58,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2022-12-13 17:49:58,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,368 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 446 transitions. [2022-12-13 17:49:58,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2022-12-13 17:49:58,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:49:58,369 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 88 flow [2022-12-13 17:49:58,369 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2022-12-13 17:49:58,370 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2022-12-13 17:49:58,370 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 88 flow [2022-12-13 17:49:58,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:58,370 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:49:58,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:49:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -91186571, now seen corresponding path program 1 times [2022-12-13 17:49:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:58,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190628225] [2022-12-13 17:49:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:58,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:58,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190628225] [2022-12-13 17:49:58,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190628225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:58,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409122313] [2022-12-13 17:49:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:58,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:58,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:49:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:49:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:58,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:58,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409122313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:58,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:58,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:49:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664225178] [2022-12-13 17:49:58,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:58,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:49:58,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:49:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:49:58,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 275 [2022-12-13 17:49:58,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 129.28571428571428) internal successors, (905), 7 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:58,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 275 [2022-12-13 17:49:58,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:58,673 INFO L130 PetriNetUnfolder]: 286/595 cut-off events. [2022-12-13 17:49:58,673 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-12-13 17:49:58,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 595 events. 286/595 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3068 event pairs, 0 based on Foata normal form. 70/665 useless extension candidates. Maximal degree in co-relation 191. Up to 346 conditions per place. [2022-12-13 17:49:58,677 INFO L137 encePairwiseOnDemand]: 272/275 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2022-12-13 17:49:58,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2022-12-13 17:49:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:49:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2022-12-13 17:49:58,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4938181818181818 [2022-12-13 17:49:58,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2022-12-13 17:49:58,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2022-12-13 17:49:58,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:58,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2022-12-13 17:49:58,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,687 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 88 flow. Second operand 5 states and 679 transitions. [2022-12-13 17:49:58,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2022-12-13 17:49:58,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:49:58,689 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 17:49:58,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 17:49:58,690 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2022-12-13 17:49:58,690 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 17:49:58,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.28571428571428) internal successors, (905), 7 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:58,691 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:49:58,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:49:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:58,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:49:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 978563545, now seen corresponding path program 1 times [2022-12-13 17:49:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:58,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839123258] [2022-12-13 17:49:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:49:58,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:49:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:49:58,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:49:58,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:49:58,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:49:58,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:49:58,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:49:58,932 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:49:58,933 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:49:58,933 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:49:58,952 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:49:58,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 184 transitions, 398 flow [2022-12-13 17:49:59,003 INFO L130 PetriNetUnfolder]: 62/402 cut-off events. [2022-12-13 17:49:59,004 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:49:59,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 62/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1322 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 277. Up to 16 conditions per place. [2022-12-13 17:49:59,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 184 transitions, 398 flow [2022-12-13 17:49:59,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 184 transitions, 398 flow [2022-12-13 17:49:59,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:49:59,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 184 transitions, 398 flow [2022-12-13 17:49:59,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 184 transitions, 398 flow [2022-12-13 17:49:59,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 184 transitions, 398 flow [2022-12-13 17:49:59,051 INFO L130 PetriNetUnfolder]: 62/402 cut-off events. [2022-12-13 17:49:59,051 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:49:59,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 62/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1322 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 277. Up to 16 conditions per place. [2022-12-13 17:49:59,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 14448 [2022-12-13 17:50:01,643 INFO L134 LiptonReduction]: Checked pairs total: 35186 [2022-12-13 17:50:01,643 INFO L136 LiptonReduction]: Total number of compositions: 136 [2022-12-13 17:50:01,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:50:01,646 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;@49824c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:50:01,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:50:01,649 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 17:50:01,649 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:50:01,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:01,649 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:50:01,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:50:01,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 34904616, now seen corresponding path program 1 times [2022-12-13 17:50:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717568265] [2022-12-13 17:50:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:01,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:01,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:01,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717568265] [2022-12-13 17:50:01,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717568265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:50:01,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:50:01,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:50:01,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012989307] [2022-12-13 17:50:01,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:50:01,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:50:01,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:50:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:50:01,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 320 [2022-12-13 17:50:01,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:01,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:50:01,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 320 [2022-12-13 17:50:01,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:50:03,368 INFO L130 PetriNetUnfolder]: 16282/24910 cut-off events. [2022-12-13 17:50:03,368 INFO L131 PetriNetUnfolder]: For 709/709 co-relation queries the response was YES. [2022-12-13 17:50:03,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48470 conditions, 24910 events. 16282/24910 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 179055 event pairs, 13853 based on Foata normal form. 5626/27830 useless extension candidates. Maximal degree in co-relation 9279. Up to 22994 conditions per place. [2022-12-13 17:50:03,430 INFO L137 encePairwiseOnDemand]: 296/320 looper letters, 35 selfloop transitions, 2 changer transitions 12/64 dead transitions. [2022-12-13 17:50:03,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 254 flow [2022-12-13 17:50:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:50:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:50:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2022-12-13 17:50:03,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2022-12-13 17:50:03,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2022-12-13 17:50:03,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2022-12-13 17:50:03,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:50:03,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2022-12-13 17:50:03,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:03,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:03,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:03,434 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 526 transitions. [2022-12-13 17:50:03,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 254 flow [2022-12-13 17:50:03,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:50:03,436 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 121 flow [2022-12-13 17:50:03,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2022-12-13 17:50:03,436 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2022-12-13 17:50:03,437 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 121 flow [2022-12-13 17:50:03,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:03,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:03,437 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:03,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:50:03,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:50:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2123079187, now seen corresponding path program 1 times [2022-12-13 17:50:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:03,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651233602] [2022-12-13 17:50:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:03,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:03,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:03,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651233602] [2022-12-13 17:50:03,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651233602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:03,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788702237] [2022-12-13 17:50:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:03,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:03,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:03,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:03,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:50:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:03,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:50:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:03,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:03,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788702237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:03,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:03,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:50:03,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513018146] [2022-12-13 17:50:03,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:03,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:50:03,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:50:03,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:50:03,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 320 [2022-12-13 17:50:03,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 151.28571428571428) internal successors, (1059), 7 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:03,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:50:03,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 320 [2022-12-13 17:50:03,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:50:03,987 INFO L130 PetriNetUnfolder]: 3352/5866 cut-off events. [2022-12-13 17:50:03,987 INFO L131 PetriNetUnfolder]: For 2156/2156 co-relation queries the response was YES. [2022-12-13 17:50:03,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 5866 events. 3352/5866 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 40891 event pairs, 315 based on Foata normal form. 511/6188 useless extension candidates. Maximal degree in co-relation 1868. Up to 3178 conditions per place. [2022-12-13 17:50:04,006 INFO L137 encePairwiseOnDemand]: 317/320 looper letters, 67 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2022-12-13 17:50:04,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 345 flow [2022-12-13 17:50:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:50:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:50:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 968 transitions. [2022-12-13 17:50:04,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2022-12-13 17:50:04,008 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 968 transitions. [2022-12-13 17:50:04,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 968 transitions. [2022-12-13 17:50:04,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:50:04,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 968 transitions. [2022-12-13 17:50:04,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:04,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:04,012 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:04,012 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 121 flow. Second operand 6 states and 968 transitions. [2022-12-13 17:50:04,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 345 flow [2022-12-13 17:50:04,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 337 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:50:04,016 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 17:50:04,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 17:50:04,017 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2022-12-13 17:50:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 17:50:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 151.28571428571428) internal successors, (1059), 7 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:04,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:04,017 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:50:04,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:50:04,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:04,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:50:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1824635665, now seen corresponding path program 1 times [2022-12-13 17:50:04,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:04,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863092652] [2022-12-13 17:50:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:50:04,259 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:50:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:50:04,275 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:50:04,275 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:50:04,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:50:04,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:50:04,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:50:04,276 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:50:04,276 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:50:04,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:50:04,310 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:50:04,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 214 transitions, 472 flow [2022-12-13 17:50:04,378 INFO L130 PetriNetUnfolder]: 96/603 cut-off events. [2022-12-13 17:50:04,378 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:50:04,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 603 events. 96/603 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2022-12-13 17:50:04,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 214 transitions, 472 flow [2022-12-13 17:50:04,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 214 transitions, 472 flow [2022-12-13 17:50:04,386 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:50:04,387 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 214 transitions, 472 flow [2022-12-13 17:50:04,387 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 214 transitions, 472 flow [2022-12-13 17:50:04,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 214 transitions, 472 flow [2022-12-13 17:50:04,481 INFO L130 PetriNetUnfolder]: 96/603 cut-off events. [2022-12-13 17:50:04,481 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:50:04,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 603 events. 96/603 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2022-12-13 17:50:04,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 22736 [2022-12-13 17:50:07,297 INFO L134 LiptonReduction]: Checked pairs total: 66041 [2022-12-13 17:50:07,298 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-12-13 17:50:07,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:50:07,300 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;@49824c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:50:07,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:50:07,302 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 17:50:07,302 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:50:07,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:07,302 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:50:07,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:50:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash 47062747, now seen corresponding path program 1 times [2022-12-13 17:50:07,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:07,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897864685] [2022-12-13 17:50:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:07,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:07,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:07,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897864685] [2022-12-13 17:50:07,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897864685] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:50:07,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:50:07,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:50:07,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814711562] [2022-12-13 17:50:07,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:50:07,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:50:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:50:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:50:07,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 365 [2022-12-13 17:50:07,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:07,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:50:07,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 365 [2022-12-13 17:50:07,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:50:33,702 INFO L130 PetriNetUnfolder]: 298488/413549 cut-off events. [2022-12-13 17:50:33,702 INFO L131 PetriNetUnfolder]: For 14614/14614 co-relation queries the response was YES. [2022-12-13 17:50:34,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809532 conditions, 413549 events. 298488/413549 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 9148. Compared 3242800 event pairs, 281380 based on Foata normal form. 66925/447650 useless extension candidates. Maximal degree in co-relation 70540. Up to 387778 conditions per place. [2022-12-13 17:50:34,877 INFO L137 encePairwiseOnDemand]: 335/365 looper letters, 49 selfloop transitions, 2 changer transitions 13/79 dead transitions. [2022-12-13 17:50:34,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2022-12-13 17:50:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:50:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:50:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2022-12-13 17:50:34,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5598173515981735 [2022-12-13 17:50:34,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2022-12-13 17:50:34,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2022-12-13 17:50:34,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:50:34,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2022-12-13 17:50:34,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:34,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:34,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:34,882 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 613 transitions. [2022-12-13 17:50:34,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2022-12-13 17:50:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:50:34,890 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2022-12-13 17:50:34,890 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2022-12-13 17:50:34,890 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2022-12-13 17:50:34,890 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2022-12-13 17:50:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:34,891 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:34,891 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:34,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:50:34,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:50:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash 923650149, now seen corresponding path program 1 times [2022-12-13 17:50:34,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:34,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594165176] [2022-12-13 17:50:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594165176] [2022-12-13 17:50:34,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594165176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029257944] [2022-12-13 17:50:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:34,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:34,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:34,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:34,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:50:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:50:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:34,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:35,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029257944] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:35,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:35,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 17:50:35,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284391892] [2022-12-13 17:50:35,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:35,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:50:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:50:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:50:35,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 365 [2022-12-13 17:50:35,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:35,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:50:35,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 365 [2022-12-13 17:50:35,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:50:44,235 INFO L130 PetriNetUnfolder]: 123712/165628 cut-off events. [2022-12-13 17:50:44,235 INFO L131 PetriNetUnfolder]: For 14824/14824 co-relation queries the response was YES. [2022-12-13 17:50:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344757 conditions, 165628 events. 123712/165628 cut-off events. For 14824/14824 co-relation queries the response was YES. Maximal size of possible extension queue 4095. Compared 1141843 event pairs, 8899 based on Foata normal form. 738/166336 useless extension candidates. Maximal degree in co-relation 305467. Up to 105949 conditions per place. [2022-12-13 17:50:44,955 INFO L137 encePairwiseOnDemand]: 361/365 looper letters, 120 selfloop transitions, 6 changer transitions 0/141 dead transitions. [2022-12-13 17:50:44,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 580 flow [2022-12-13 17:50:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:50:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:50:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1155 transitions. [2022-12-13 17:50:44,958 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5273972602739726 [2022-12-13 17:50:44,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1155 transitions. [2022-12-13 17:50:44,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1155 transitions. [2022-12-13 17:50:44,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:50:44,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1155 transitions. [2022-12-13 17:50:44,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.5) internal successors, (1155), 6 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:44,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 365.0) internal successors, (2555), 7 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:44,963 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 365.0) internal successors, (2555), 7 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:44,963 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 6 states and 1155 transitions. [2022-12-13 17:50:44,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 580 flow [2022-12-13 17:50:44,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 141 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:50:44,974 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2022-12-13 17:50:44,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 17:50:44,975 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2022-12-13 17:50:44,975 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2022-12-13 17:50:44,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:44,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:44,975 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:44,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:50:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69db1b8c-edcd-4274-96de-460c3251a9d9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:50:45,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:50:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash -21887788, now seen corresponding path program 1 times [2022-12-13 17:50:45,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:45,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038792981] [2022-12-13 17:50:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:50:45,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:50:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:50:45,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:50:45,223 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:50:45,223 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 17:50:45,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:50:45,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:50:45,224 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:50:45,224 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:50:45,224 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 17:50:45,371 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 17:50:45,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 244 transitions, 548 flow [2022-12-13 17:50:45,459 INFO L130 PetriNetUnfolder]: 158/944 cut-off events. [2022-12-13 17:50:45,459 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:50:45,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 944 events. 158/944 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4200 event pairs, 23 based on Foata normal form. 0/796 useless extension candidates. Maximal degree in co-relation 648. Up to 80 conditions per place. [2022-12-13 17:50:45,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 244 transitions, 548 flow [2022-12-13 17:50:45,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 244 transitions, 548 flow [2022-12-13 17:50:45,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:50:45,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 244 transitions, 548 flow [2022-12-13 17:50:45,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 244 transitions, 548 flow [2022-12-13 17:50:45,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 244 transitions, 548 flow [2022-12-13 17:50:45,553 INFO L130 PetriNetUnfolder]: 158/944 cut-off events. [2022-12-13 17:50:45,553 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 17:50:45,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 944 events. 158/944 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4200 event pairs, 23 based on Foata normal form. 0/796 useless extension candidates. Maximal degree in co-relation 648. Up to 80 conditions per place. [2022-12-13 17:50:45,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 32760 [2022-12-13 17:50:48,479 INFO L134 LiptonReduction]: Checked pairs total: 100450 [2022-12-13 17:50:48,480 INFO L136 LiptonReduction]: Total number of compositions: 166 [2022-12-13 17:50:48,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:50:48,481 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;@49824c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:50:48,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:50:48,482 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 17:50:48,482 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:50:48,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:48,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:50:48,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 17:50:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash 60607087, now seen corresponding path program 1 times [2022-12-13 17:50:48,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:48,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474579952] [2022-12-13 17:50:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:48,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:48,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:48,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474579952] [2022-12-13 17:50:48,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474579952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:50:48,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:50:48,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:50:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756818463] [2022-12-13 17:50:48,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:50:48,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:50:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:50:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:50:48,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 410 [2022-12-13 17:50:48,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:48,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:50:48,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 410 [2022-12-13 17:50:48,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand