./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/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_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/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_e9a351c4-19e9-443f-a3a5-0378f718de28/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 adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 --- 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 15:51:10,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:51:10,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:51:10,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:51:10,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:51:10,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:51:10,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:51:10,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:51:10,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:51:10,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:51:10,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:51:10,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:51:10,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:51:10,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:51:10,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:51:10,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:51:10,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:51:10,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:51:10,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:51:10,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:51:10,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:51:10,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:51:10,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:51:10,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:51:10,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:51:10,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:51:10,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:51:10,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:51:10,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:51:10,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:51:10,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:51:10,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:51:10,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:51:10,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:51:10,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:51:10,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:51:10,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:51:10,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:51:10,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:51:10,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:51:10,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:51:10,990 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:51:11,018 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:51:11,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:51:11,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:51:11,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:51:11,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:51:11,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:51:11,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:51:11,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:51:11,020 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:51:11,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:51:11,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:51:11,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:51:11,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:51:11,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:51:11,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:51:11,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:51:11,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:51:11,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:51:11,022 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:51:11,022 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_e9a351c4-19e9-443f-a3a5-0378f718de28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 [2022-12-13 15:51:11,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:51:11,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:51:11,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:51:11,219 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:51:11,219 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:51:11,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-12-13 15:51:13,900 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:51:14,087 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:51:14,087 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-12-13 15:51:14,098 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/data/8bf0772c0/7271bb0188ad4e2ba654145835e01920/FLAG05126b436 [2022-12-13 15:51:14,112 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/data/8bf0772c0/7271bb0188ad4e2ba654145835e01920 [2022-12-13 15:51:14,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:51:14,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:51:14,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:51:14,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:51:14,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:51:14,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a68d4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14, skipping insertion in model container [2022-12-13 15:51:14,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:51:14,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:51:14,452 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_e9a351c4-19e9-443f-a3a5-0378f718de28/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-12-13 15:51:14,458 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_e9a351c4-19e9-443f-a3a5-0378f718de28/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-12-13 15:51:14,460 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-12-13 15:51:14,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:51:14,473 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:51:14,507 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_e9a351c4-19e9-443f-a3a5-0378f718de28/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-12-13 15:51:14,509 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_e9a351c4-19e9-443f-a3a5-0378f718de28/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-12-13 15:51:14,510 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_e9a351c4-19e9-443f-a3a5-0378f718de28/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-12-13 15:51:14,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:51:14,539 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:51:14,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14 WrapperNode [2022-12-13 15:51:14,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:51:14,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:51:14,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:51:14,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:51:14,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,577 INFO L138 Inliner]: procedures = 176, calls = 34, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 141 [2022-12-13 15:51:14,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:51:14,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:51:14,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:51:14,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:51:14,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,600 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:51:14,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:51:14,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:51:14,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:51:14,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (1/1) ... [2022-12-13 15:51:14,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:51:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:14,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:51:14,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a351c4-19e9-443f-a3a5-0378f718de28/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:51:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:51:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 15:51:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 15:51:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:51:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:51:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:51:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:51:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:51:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:51:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:51:14,661 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 15:51:14,757 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:51:14,758 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:51:14,945 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:51:15,013 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:51:15,013 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:51:15,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:51:15 BoogieIcfgContainer [2022-12-13 15:51:15,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:51:15,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:51:15,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:51:15,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:51:15,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:51:14" (1/3) ... [2022-12-13 15:51:15,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f974c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:51:15, skipping insertion in model container [2022-12-13 15:51:15,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:14" (2/3) ... [2022-12-13 15:51:15,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f974c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:51:15, skipping insertion in model container [2022-12-13 15:51:15,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:51:15" (3/3) ... [2022-12-13 15:51:15,021 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2022-12-13 15:51:15,028 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:51:15,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:51:15,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-12-13 15:51:15,035 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:51:15,081 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:51:15,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 129 transitions, 263 flow [2022-12-13 15:51:15,143 INFO L130 PetriNetUnfolder]: 14/140 cut-off events. [2022-12-13 15:51:15,143 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:51:15,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2022-12-13 15:51:15,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 129 transitions, 263 flow [2022-12-13 15:51:15,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 129 transitions, 263 flow [2022-12-13 15:51:15,154 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:51:15,162 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 129 transitions, 263 flow [2022-12-13 15:51:15,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 129 transitions, 263 flow [2022-12-13 15:51:15,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 129 transitions, 263 flow [2022-12-13 15:51:15,187 INFO L130 PetriNetUnfolder]: 14/140 cut-off events. [2022-12-13 15:51:15,188 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:51:15,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2022-12-13 15:51:15,193 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-13 15:51:18,198 INFO L134 LiptonReduction]: Checked pairs total: 2795 [2022-12-13 15:51:18,198 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-12-13 15:51:18,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:51:18,213 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;@7a585222, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:51:18,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 15:51:18,216 INFO L130 PetriNetUnfolder]: 4/16 cut-off events. [2022-12-13 15:51:18,216 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:51:18,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:18,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:51:18,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 15:51:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash 660101286, now seen corresponding path program 1 times [2022-12-13 15:51:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:18,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884200577] [2022-12-13 15:51:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:18,492 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 15:51:18,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:18,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884200577] [2022-12-13 15:51:18,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884200577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:18,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:18,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:51:18,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200120924] [2022-12-13 15:51:18,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:18,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:51:18,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:18,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:51:18,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:51:18,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 266 [2022-12-13 15:51:18,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 22 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 15:51:18,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:18,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 266 [2022-12-13 15:51:18,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:18,593 INFO L130 PetriNetUnfolder]: 30/68 cut-off events. [2022-12-13 15:51:18,593 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:51:18,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 68 events. 30/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 176 event pairs, 16 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 122. Up to 58 conditions per place. [2022-12-13 15:51:18,595 INFO L137 encePairwiseOnDemand]: 260/266 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2022-12-13 15:51:18,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 22 transitions, 91 flow [2022-12-13 15:51:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:51:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:51:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2022-12-13 15:51:18,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43609022556390975 [2022-12-13 15:51:18,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2022-12-13 15:51:18,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2022-12-13 15:51:18,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:18,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2022-12-13 15:51:18,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 15:51:18,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 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 15:51:18,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 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 15:51:18,619 INFO L175 Difference]: Start difference. First operand has 19 places, 22 transitions, 49 flow. Second operand 3 states and 348 transitions. [2022-12-13 15:51:18,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 22 transitions, 91 flow [2022-12-13 15:51:18,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 91 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:51:18,622 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 55 flow [2022-12-13 15:51:18,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2022-12-13 15:51:18,627 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 2 predicate places. [2022-12-13 15:51:18,627 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 55 flow [2022-12-13 15:51:18,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 15:51:18,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:18,628 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 15:51:18,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:51:18,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 15:51:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1011774579, now seen corresponding path program 1 times [2022-12-13 15:51:18,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:18,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555858645] [2022-12-13 15:51:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:18,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:51:18,646 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:51:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:51:18,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:51:18,671 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:51:18,673 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 15:51:18,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 15:51:18,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-13 15:51:18,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-12-13 15:51:18,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-12-13 15:51:18,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-13 15:51:18,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 15:51:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:51:18,676 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 15:51:18,679 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:51:18,679 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 15:51:18,711 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:51:18,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 464 flow [2022-12-13 15:51:18,762 INFO L130 PetriNetUnfolder]: 27/250 cut-off events. [2022-12-13 15:51:18,762 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:51:18,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 250 events. 27/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 678 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 205. Up to 6 conditions per place. [2022-12-13 15:51:18,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 226 transitions, 464 flow [2022-12-13 15:51:18,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 226 transitions, 464 flow [2022-12-13 15:51:18,769 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:51:18,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 226 transitions, 464 flow [2022-12-13 15:51:18,770 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 226 transitions, 464 flow [2022-12-13 15:51:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 464 flow [2022-12-13 15:51:18,801 INFO L130 PetriNetUnfolder]: 27/250 cut-off events. [2022-12-13 15:51:18,801 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:51:18,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 250 events. 27/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 678 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 205. Up to 6 conditions per place. [2022-12-13 15:51:18,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 24000 [2022-12-13 15:51:22,301 INFO L134 LiptonReduction]: Checked pairs total: 30959 [2022-12-13 15:51:22,301 INFO L136 LiptonReduction]: Total number of compositions: 231 [2022-12-13 15:51:22,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:51:22,304 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;@7a585222, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:51:22,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 15:51:22,308 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2022-12-13 15:51:22,308 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:51:22,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:22,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:22,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-12-13 15:51:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash -622923623, now seen corresponding path program 1 times [2022-12-13 15:51:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:22,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412407230] [2022-12-13 15:51:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:22,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,387 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 15:51:22,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412407230] [2022-12-13 15:51:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412407230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:22,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:22,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:51:22,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111058233] [2022-12-13 15:51:22,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:51:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:51:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:51:22,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 457 [2022-12-13 15:51:22,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 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 15:51:22,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:22,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 457 [2022-12-13 15:51:22,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:22,698 INFO L130 PetriNetUnfolder]: 1279/2082 cut-off events. [2022-12-13 15:51:22,699 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-12-13 15:51:22,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4215 conditions, 2082 events. 1279/2082 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11646 event pairs, 597 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 1610. Up to 1216 conditions per place. [2022-12-13 15:51:22,707 INFO L137 encePairwiseOnDemand]: 445/457 looper letters, 85 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-13 15:51:22,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 392 flow [2022-12-13 15:51:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:51:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:51:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 848 transitions. [2022-12-13 15:51:22,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4638949671772429 [2022-12-13 15:51:22,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 848 transitions. [2022-12-13 15:51:22,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 848 transitions. [2022-12-13 15:51:22,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:22,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 848 transitions. [2022-12-13 15:51:22,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 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 15:51:22,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 15:51:22,732 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 15:51:22,732 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 120 flow. Second operand 4 states and 848 transitions. [2022-12-13 15:51:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 392 flow [2022-12-13 15:51:22,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 95 transitions, 390 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 15:51:22,735 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 138 flow [2022-12-13 15:51:22,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2022-12-13 15:51:22,736 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2022-12-13 15:51:22,736 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 138 flow [2022-12-13 15:51:22,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 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 15:51:22,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:22,737 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:22,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:51:22,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-12-13 15:51:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:22,738 INFO L85 PathProgramCache]: Analyzing trace with hash 88969376, now seen corresponding path program 1 times [2022-12-13 15:51:22,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:22,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868667209] [2022-12-13 15:51:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:22,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,766 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 15:51:22,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:22,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868667209] [2022-12-13 15:51:22,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868667209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:22,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:22,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:51:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175787810] [2022-12-13 15:51:22,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:51:22,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:51:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:51:22,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 457 [2022-12-13 15:51:22,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 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 15:51:22,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:22,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 457 [2022-12-13 15:51:22,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:22,924 INFO L130 PetriNetUnfolder]: 530/897 cut-off events. [2022-12-13 15:51:22,924 INFO L131 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2022-12-13 15:51:22,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 897 events. 530/897 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4282 event pairs, 157 based on Foata normal form. 10/837 useless extension candidates. Maximal degree in co-relation 710. Up to 701 conditions per place. [2022-12-13 15:51:22,928 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 60 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-12-13 15:51:22,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 328 flow [2022-12-13 15:51:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:51:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:51:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2022-12-13 15:51:22,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4587892049598833 [2022-12-13 15:51:22,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2022-12-13 15:51:22,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2022-12-13 15:51:22,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:22,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2022-12-13 15:51:22,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 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 15:51:22,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 15:51:22,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 15:51:22,937 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 138 flow. Second operand 3 states and 629 transitions. [2022-12-13 15:51:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 328 flow [2022-12-13 15:51:22,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 317 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:51:22,939 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 172 flow [2022-12-13 15:51:22,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2022-12-13 15:51:22,940 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2022-12-13 15:51:22,940 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 172 flow [2022-12-13 15:51:22,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 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 15:51:22,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:22,941 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 15:51:22,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:51:22,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-12-13 15:51:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1592936156, now seen corresponding path program 1 times [2022-12-13 15:51:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:22,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475667843] [2022-12-13 15:51:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:51:22,951 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:51:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:51:22,963 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:51:22,963 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:51:22,963 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-12-13 15:51:22,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2022-12-13 15:51:22,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2022-12-13 15:51:22,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2022-12-13 15:51:22,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2022-12-13 15:51:22,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2022-12-13 15:51:22,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2022-12-13 15:51:22,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2022-12-13 15:51:22,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2022-12-13 15:51:22,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2022-12-13 15:51:22,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:51:22,965 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 15:51:22,966 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:51:22,966 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 15:51:22,995 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:51:23,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 323 transitions, 667 flow [2022-12-13 15:51:23,047 INFO L130 PetriNetUnfolder]: 40/360 cut-off events. [2022-12-13 15:51:23,047 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:51:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 360 events. 40/360 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1273 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 301. Up to 8 conditions per place. [2022-12-13 15:51:23,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 323 transitions, 667 flow [2022-12-13 15:51:23,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 323 transitions, 667 flow [2022-12-13 15:51:23,052 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:51:23,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 323 transitions, 667 flow [2022-12-13 15:51:23,052 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 323 transitions, 667 flow [2022-12-13 15:51:23,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 323 transitions, 667 flow [2022-12-13 15:51:23,092 INFO L130 PetriNetUnfolder]: 40/360 cut-off events. [2022-12-13 15:51:23,092 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:51:23,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 360 events. 40/360 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1273 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 301. Up to 8 conditions per place. [2022-12-13 15:51:23,116 INFO L119 LiptonReduction]: Number of co-enabled transitions 63936 [2022-12-13 15:51:28,137 INFO L134 LiptonReduction]: Checked pairs total: 81144 [2022-12-13 15:51:28,137 INFO L136 LiptonReduction]: Total number of compositions: 336 [2022-12-13 15:51:28,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:51:28,141 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;@7a585222, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:51:28,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-13 15:51:28,144 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2022-12-13 15:51:28,144 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:51:28,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:28,144 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:28,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-12-13 15:51:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -488942503, now seen corresponding path program 1 times [2022-12-13 15:51:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:28,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376155622] [2022-12-13 15:51:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:28,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,205 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 15:51:28,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376155622] [2022-12-13 15:51:28,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376155622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:28,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:28,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:51:28,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216384106] [2022-12-13 15:51:28,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:28,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:51:28,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:51:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:51:28,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 659 [2022-12-13 15:51:28,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 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 15:51:28,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:28,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 659 [2022-12-13 15:51:28,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:31,737 INFO L130 PetriNetUnfolder]: 37159/50815 cut-off events. [2022-12-13 15:51:31,737 INFO L131 PetriNetUnfolder]: For 3097/3097 co-relation queries the response was YES. [2022-12-13 15:51:31,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103177 conditions, 50815 events. 37159/50815 cut-off events. For 3097/3097 co-relation queries the response was YES. Maximal size of possible extension queue 1950. Compared 323748 event pairs, 19210 based on Foata normal form. 0/38381 useless extension candidates. Maximal degree in co-relation 16211. Up to 39429 conditions per place. [2022-12-13 15:51:31,993 INFO L137 encePairwiseOnDemand]: 642/659 looper letters, 116 selfloop transitions, 7 changer transitions 0/130 dead transitions. [2022-12-13 15:51:31,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 130 transitions, 539 flow [2022-12-13 15:51:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:51:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:51:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 941 transitions. [2022-12-13 15:51:31,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4759736975214972 [2022-12-13 15:51:31,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 941 transitions. [2022-12-13 15:51:31,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 941 transitions. [2022-12-13 15:51:31,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:31,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 941 transitions. [2022-12-13 15:51:31,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 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 15:51:32,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 0 states have call successors, (0), 0 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 15:51:32,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 0 states have call successors, (0), 0 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 15:51:32,002 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 177 flow. Second operand 3 states and 941 transitions. [2022-12-13 15:51:32,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 130 transitions, 539 flow [2022-12-13 15:51:32,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 130 transitions, 531 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 15:51:32,011 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 219 flow [2022-12-13 15:51:32,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2022-12-13 15:51:32,012 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2022-12-13 15:51:32,012 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 219 flow [2022-12-13 15:51:32,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 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 15:51:32,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:32,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:32,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:51:32,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-12-13 15:51:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:32,014 INFO L85 PathProgramCache]: Analyzing trace with hash -356389693, now seen corresponding path program 1 times [2022-12-13 15:51:32,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:32,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633846604] [2022-12-13 15:51:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:32,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:32,057 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 15:51:32,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633846604] [2022-12-13 15:51:32,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633846604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:32,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:32,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:51:32,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960883846] [2022-12-13 15:51:32,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:32,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:51:32,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:32,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:51:32,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:51:32,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 659 [2022-12-13 15:51:32,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 15:51:32,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:32,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 659 [2022-12-13 15:51:32,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:34,546 INFO L130 PetriNetUnfolder]: 24163/33662 cut-off events. [2022-12-13 15:51:34,546 INFO L131 PetriNetUnfolder]: For 10572/10572 co-relation queries the response was YES. [2022-12-13 15:51:34,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79978 conditions, 33662 events. 24163/33662 cut-off events. For 10572/10572 co-relation queries the response was YES. Maximal size of possible extension queue 1380. Compared 215093 event pairs, 4187 based on Foata normal form. 390/30043 useless extension candidates. Maximal degree in co-relation 76307. Up to 21223 conditions per place. [2022-12-13 15:51:34,683 INFO L137 encePairwiseOnDemand]: 646/659 looper letters, 203 selfloop transitions, 17 changer transitions 0/225 dead transitions. [2022-12-13 15:51:34,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 225 transitions, 1076 flow [2022-12-13 15:51:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:51:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:51:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1522 transitions. [2022-12-13 15:51:34,687 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46191198786039456 [2022-12-13 15:51:34,687 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1522 transitions. [2022-12-13 15:51:34,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1522 transitions. [2022-12-13 15:51:34,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:34,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1522 transitions. [2022-12-13 15:51:34,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.4) internal successors, (1522), 5 states have internal predecessors, (1522), 0 states have call successors, (0), 0 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 15:51:34,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 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 15:51:34,694 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 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 15:51:34,694 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 219 flow. Second operand 5 states and 1522 transitions. [2022-12-13 15:51:34,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 225 transitions, 1076 flow [2022-12-13 15:51:34,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 225 transitions, 1034 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:51:34,735 INFO L231 Difference]: Finished difference. Result has 76 places, 91 transitions, 331 flow [2022-12-13 15:51:34,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=76, PETRI_TRANSITIONS=91} [2022-12-13 15:51:34,736 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2022-12-13 15:51:34,736 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 91 transitions, 331 flow [2022-12-13 15:51:34,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 265.5) internal successors, (1062), 4 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 15:51:34,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:34,737 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:34,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:51:34,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-12-13 15:51:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash -166559891, now seen corresponding path program 1 times [2022-12-13 15:51:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396006354] [2022-12-13 15:51:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:34,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:34,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396006354] [2022-12-13 15:51:34,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396006354] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:34,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:34,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:51:34,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087244915] [2022-12-13 15:51:34,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:51:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:51:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:51:34,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 659 [2022-12-13 15:51:34,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 91 transitions, 331 flow. Second operand has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 15:51:34,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:34,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 659 [2022-12-13 15:51:34,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:37,853 INFO L130 PetriNetUnfolder]: 24812/35111 cut-off events. [2022-12-13 15:51:37,854 INFO L131 PetriNetUnfolder]: For 17436/17782 co-relation queries the response was YES. [2022-12-13 15:51:37,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89200 conditions, 35111 events. 24812/35111 cut-off events. For 17436/17782 co-relation queries the response was YES. Maximal size of possible extension queue 1646. Compared 234136 event pairs, 10441 based on Foata normal form. 1053/32609 useless extension candidates. Maximal degree in co-relation 44217. Up to 19980 conditions per place. [2022-12-13 15:51:38,065 INFO L137 encePairwiseOnDemand]: 649/659 looper letters, 138 selfloop transitions, 11 changer transitions 0/159 dead transitions. [2022-12-13 15:51:38,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 159 transitions, 863 flow [2022-12-13 15:51:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:51:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:51:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1182 transitions. [2022-12-13 15:51:38,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44840667678300455 [2022-12-13 15:51:38,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1182 transitions. [2022-12-13 15:51:38,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1182 transitions. [2022-12-13 15:51:38,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:38,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1182 transitions. [2022-12-13 15:51:38,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.5) internal successors, (1182), 4 states have internal predecessors, (1182), 0 states have call successors, (0), 0 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 15:51:38,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 659.0) internal successors, (3295), 5 states have internal predecessors, (3295), 0 states have call successors, (0), 0 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 15:51:38,075 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 659.0) internal successors, (3295), 5 states have internal predecessors, (3295), 0 states have call successors, (0), 0 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 15:51:38,075 INFO L175 Difference]: Start difference. First operand has 76 places, 91 transitions, 331 flow. Second operand 4 states and 1182 transitions. [2022-12-13 15:51:38,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 159 transitions, 863 flow [2022-12-13 15:51:38,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 159 transitions, 863 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:51:38,095 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 416 flow [2022-12-13 15:51:38,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2022-12-13 15:51:38,095 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 14 predicate places. [2022-12-13 15:51:38,095 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 416 flow [2022-12-13 15:51:38,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 15:51:38,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:38,096 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:38,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:51:38,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-12-13 15:51:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:38,097 INFO L85 PathProgramCache]: Analyzing trace with hash 717264291, now seen corresponding path program 1 times [2022-12-13 15:51:38,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:38,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851547097] [2022-12-13 15:51:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:51:38,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:38,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851547097] [2022-12-13 15:51:38,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851547097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:38,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:38,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:51:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568932459] [2022-12-13 15:51:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:38,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:51:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:51:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:51:38,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 659 [2022-12-13 15:51:38,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 268.25) internal successors, (1073), 4 states have internal predecessors, (1073), 0 states have call successors, (0), 0 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 15:51:38,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:38,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 659 [2022-12-13 15:51:38,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:41,383 INFO L130 PetriNetUnfolder]: 27559/39924 cut-off events. [2022-12-13 15:51:41,384 INFO L131 PetriNetUnfolder]: For 30265/30673 co-relation queries the response was YES. [2022-12-13 15:51:41,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107621 conditions, 39924 events. 27559/39924 cut-off events. For 30265/30673 co-relation queries the response was YES. Maximal size of possible extension queue 1846. Compared 279661 event pairs, 5812 based on Foata normal form. 1023/36968 useless extension candidates. Maximal degree in co-relation 52556. Up to 12889 conditions per place. [2022-12-13 15:51:41,575 INFO L137 encePairwiseOnDemand]: 648/659 looper letters, 219 selfloop transitions, 26 changer transitions 0/255 dead transitions. [2022-12-13 15:51:41,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 255 transitions, 1506 flow [2022-12-13 15:51:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:51:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:51:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1533 transitions. [2022-12-13 15:51:41,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4652503793626707 [2022-12-13 15:51:41,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1533 transitions. [2022-12-13 15:51:41,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1533 transitions. [2022-12-13 15:51:41,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:41,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1533 transitions. [2022-12-13 15:51:41,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 306.6) internal successors, (1533), 5 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:41,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 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 15:51:41,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 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 15:51:41,585 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 416 flow. Second operand 5 states and 1533 transitions. [2022-12-13 15:51:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 255 transitions, 1506 flow [2022-12-13 15:51:41,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 255 transitions, 1505 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:51:41,614 INFO L231 Difference]: Finished difference. Result has 85 places, 112 transitions, 596 flow [2022-12-13 15:51:41,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=596, PETRI_PLACES=85, PETRI_TRANSITIONS=112} [2022-12-13 15:51:41,615 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 18 predicate places. [2022-12-13 15:51:41,615 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 112 transitions, 596 flow [2022-12-13 15:51:41,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 268.25) internal successors, (1073), 4 states have internal predecessors, (1073), 0 states have call successors, (0), 0 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 15:51:41,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:41,615 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 15:51:41,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:51:41,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-12-13 15:51:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1895649638, now seen corresponding path program 1 times [2022-12-13 15:51:41,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:41,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499314912] [2022-12-13 15:51:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:41,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:51:41,623 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:51:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:51:41,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:51:41,630 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2022-12-13 15:51:41,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2022-12-13 15:51:41,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:51:41,632 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 15:51:41,632 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:51:41,632 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 15:51:41,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:51:41,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 380 places, 420 transitions, 872 flow [2022-12-13 15:51:41,742 INFO L130 PetriNetUnfolder]: 53/470 cut-off events. [2022-12-13 15:51:41,743 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:51:41,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 470 events. 53/470 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1897 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 397. Up to 10 conditions per place. [2022-12-13 15:51:41,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 380 places, 420 transitions, 872 flow [2022-12-13 15:51:41,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 380 places, 420 transitions, 872 flow [2022-12-13 15:51:41,750 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:51:41,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 380 places, 420 transitions, 872 flow [2022-12-13 15:51:41,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 380 places, 420 transitions, 872 flow [2022-12-13 15:51:41,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 380 places, 420 transitions, 872 flow [2022-12-13 15:51:41,809 INFO L130 PetriNetUnfolder]: 53/470 cut-off events. [2022-12-13 15:51:41,809 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:51:41,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 470 events. 53/470 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1897 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 397. Up to 10 conditions per place. [2022-12-13 15:51:41,834 INFO L119 LiptonReduction]: Number of co-enabled transitions 122496 [2022-12-13 15:51:49,033 INFO L134 LiptonReduction]: Checked pairs total: 161025 [2022-12-13 15:51:49,033 INFO L136 LiptonReduction]: Total number of compositions: 438 [2022-12-13 15:51:49,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:51:49,035 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;@7a585222, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:51:49,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-12-13 15:51:49,037 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2022-12-13 15:51:49,037 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:51:49,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:49,037 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:49,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-12-13 15:51:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash 988311036, now seen corresponding path program 1 times [2022-12-13 15:51:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:49,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167703556] [2022-12-13 15:51:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:49,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,071 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 15:51:49,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:49,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167703556] [2022-12-13 15:51:49,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167703556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:49,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:49,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:51:49,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773844371] [2022-12-13 15:51:49,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:51:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:51:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:51:49,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 858 [2022-12-13 15:51:49,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 348.25) internal successors, (1393), 4 states have internal predecessors, (1393), 0 states have call successors, (0), 0 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 15:51:49,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:49,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 858 [2022-12-13 15:51:49,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:52:58,714 INFO L130 PetriNetUnfolder]: 848901/1067982 cut-off events. [2022-12-13 15:52:58,714 INFO L131 PetriNetUnfolder]: For 80387/80387 co-relation queries the response was YES. [2022-12-13 15:53:00,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2168330 conditions, 1067982 events. 848901/1067982 cut-off events. For 80387/80387 co-relation queries the response was YES. Maximal size of possible extension queue 28044. Compared 7229017 event pairs, 417294 based on Foata normal form. 0/770467 useless extension candidates. Maximal degree in co-relation 100566. Up to 657878 conditions per place. [2022-12-13 15:53:04,192 INFO L137 encePairwiseOnDemand]: 836/858 looper letters, 203 selfloop transitions, 9 changer transitions 0/219 dead transitions. [2022-12-13 15:53:04,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 219 transitions, 936 flow [2022-12-13 15:53:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:53:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:53:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1624 transitions. [2022-12-13 15:53:04,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731934731934732 [2022-12-13 15:53:04,195 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1624 transitions. [2022-12-13 15:53:04,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1624 transitions. [2022-12-13 15:53:04,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:53:04,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1624 transitions. [2022-12-13 15:53:04,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 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 15:53:04,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 858.0) internal successors, (4290), 5 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 15:53:04,202 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 858.0) internal successors, (4290), 5 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 15:53:04,203 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 236 flow. Second operand 4 states and 1624 transitions. [2022-12-13 15:53:04,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 219 transitions, 936 flow [2022-12-13 15:53:04,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 219 transitions, 912 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-12-13 15:53:04,248 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 268 flow [2022-12-13 15:53:04,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=858, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2022-12-13 15:53:04,249 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2022-12-13 15:53:04,249 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 268 flow [2022-12-13 15:53:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 348.25) internal successors, (1393), 4 states have internal predecessors, (1393), 0 states have call successors, (0), 0 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 15:53:04,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:53:04,250 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:53:04,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:53:04,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-12-13 15:53:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:53:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -282055279, now seen corresponding path program 1 times [2022-12-13 15:53:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:53:04,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160173316] [2022-12-13 15:53:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:53:04,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:53:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:53:04,271 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 15:53:04,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:53:04,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160173316] [2022-12-13 15:53:04,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160173316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:53:04,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:53:04,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:53:04,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947272195] [2022-12-13 15:53:04,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:53:04,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:53:04,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:53:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:53:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:53:04,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 858 [2022-12-13 15:53:04,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 15:53:04,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:53:04,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 858 [2022-12-13 15:53:04,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:53:55,952 INFO L130 PetriNetUnfolder]: 640215/812793 cut-off events. [2022-12-13 15:53:55,952 INFO L131 PetriNetUnfolder]: For 178079/178185 co-relation queries the response was YES. [2022-12-13 15:53:57,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866442 conditions, 812793 events. 640215/812793 cut-off events. For 178079/178185 co-relation queries the response was YES. Maximal size of possible extension queue 24289. Compared 5613710 event pairs, 213546 based on Foata normal form. 1359/694132 useless extension candidates. Maximal degree in co-relation 900756. Up to 617772 conditions per place. [2022-12-13 15:54:00,812 INFO L137 encePairwiseOnDemand]: 846/858 looper letters, 172 selfloop transitions, 9 changer transitions 0/188 dead transitions. [2022-12-13 15:54:00,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 188 transitions, 864 flow [2022-12-13 15:54:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:54:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:54:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1219 transitions. [2022-12-13 15:54:00,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47358197358197357 [2022-12-13 15:54:00,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1219 transitions. [2022-12-13 15:54:00,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1219 transitions. [2022-12-13 15:54:00,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:54:00,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1219 transitions. [2022-12-13 15:54:00,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 406.3333333333333) internal successors, (1219), 3 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 15:54:00,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 858.0) internal successors, (3432), 4 states have internal predecessors, (3432), 0 states have call successors, (0), 0 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 15:54:00,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 858.0) internal successors, (3432), 4 states have internal predecessors, (3432), 0 states have call successors, (0), 0 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 15:54:00,822 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 268 flow. Second operand 3 states and 1219 transitions. [2022-12-13 15:54:00,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 188 transitions, 864 flow [2022-12-13 15:54:00,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 188 transitions, 845 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:54:00,844 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 332 flow [2022-12-13 15:54:00,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=858, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2022-12-13 15:54:00,845 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2022-12-13 15:54:00,845 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 332 flow [2022-12-13 15:54:00,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 15:54:00,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:54:00,845 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:54:00,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-12-13 15:54:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -206761198, now seen corresponding path program 1 times [2022-12-13 15:54:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968647056] [2022-12-13 15:54:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:54:00,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:00,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968647056] [2022-12-13 15:54:00,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968647056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:54:00,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:54:00,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:54:00,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726425257] [2022-12-13 15:54:00,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:54:00,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:54:00,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:54:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:54:00,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 858 [2022-12-13 15:54:00,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 344.6666666666667) internal successors, (2068), 6 states have internal predecessors, (2068), 0 states have call successors, (0), 0 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 15:54:00,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:54:00,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 858 [2022-12-13 15:54:00,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:55:00,770 INFO L130 PetriNetUnfolder]: 693105/884658 cut-off events. [2022-12-13 15:55:00,770 INFO L131 PetriNetUnfolder]: For 319887/320433 co-relation queries the response was YES. [2022-12-13 15:55:02,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135168 conditions, 884658 events. 693105/884658 cut-off events. For 319887/320433 co-relation queries the response was YES. Maximal size of possible extension queue 28517. Compared 6243112 event pairs, 282623 based on Foata normal form. 12704/779614 useless extension candidates. Maximal degree in co-relation 2067566. Up to 366628 conditions per place. [2022-12-13 15:55:06,323 INFO L137 encePairwiseOnDemand]: 845/858 looper letters, 218 selfloop transitions, 16 changer transitions 0/243 dead transitions. [2022-12-13 15:55:06,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 243 transitions, 1196 flow [2022-12-13 15:55:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:55:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:55:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1931 transitions. [2022-12-13 15:55:06,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4501165501165501 [2022-12-13 15:55:06,328 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1931 transitions. [2022-12-13 15:55:06,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1931 transitions. [2022-12-13 15:55:06,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:55:06,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1931 transitions. [2022-12-13 15:55:06,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 386.2) internal successors, (1931), 5 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:55:06,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 858.0) internal successors, (5148), 6 states have internal predecessors, (5148), 0 states have call successors, (0), 0 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 15:55:06,340 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 858.0) internal successors, (5148), 6 states have internal predecessors, (5148), 0 states have call successors, (0), 0 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 15:55:06,340 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 332 flow. Second operand 5 states and 1931 transitions. [2022-12-13 15:55:06,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 243 transitions, 1196 flow [2022-12-13 15:55:07,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 243 transitions, 1160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:55:07,104 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 403 flow [2022-12-13 15:55:07,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=858, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=403, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2022-12-13 15:55:07,105 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2022-12-13 15:55:07,105 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 403 flow [2022-12-13 15:55:07,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 344.6666666666667) internal successors, (2068), 6 states have internal predecessors, (2068), 0 states have call successors, (0), 0 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 15:55:07,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:55:07,106 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:55:07,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:55:07,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-12-13 15:55:07,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:55:07,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1572708853, now seen corresponding path program 1 times [2022-12-13 15:55:07,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:55:07,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278659148] [2022-12-13 15:55:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:55:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:55:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:55:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:55:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:55:07,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278659148] [2022-12-13 15:55:07,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278659148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:55:07,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:55:07,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:55:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707670840] [2022-12-13 15:55:07,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:55:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:55:07,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:55:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:55:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:55:07,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 858 [2022-12-13 15:55:07,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 348.25) internal successors, (1393), 4 states have internal predecessors, (1393), 0 states have call successors, (0), 0 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 15:55:07,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:55:07,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 858 [2022-12-13 15:55:07,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:56:15,108 INFO L130 PetriNetUnfolder]: 784866/1006058 cut-off events. [2022-12-13 15:56:15,108 INFO L131 PetriNetUnfolder]: For 537992/538495 co-relation queries the response was YES. [2022-12-13 15:56:17,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2535447 conditions, 1006058 events. 784866/1006058 cut-off events. For 537992/538495 co-relation queries the response was YES. Maximal size of possible extension queue 31228. Compared 7224212 event pairs, 326522 based on Foata normal form. 16928/875217 useless extension candidates. Maximal degree in co-relation 1185107. Up to 475267 conditions per place. [2022-12-13 15:56:21,649 INFO L137 encePairwiseOnDemand]: 845/858 looper letters, 239 selfloop transitions, 12 changer transitions 0/260 dead transitions. [2022-12-13 15:56:21,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 260 transitions, 1373 flow [2022-12-13 15:56:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:56:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:56:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1601 transitions. [2022-12-13 15:56:21,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4664918414918415 [2022-12-13 15:56:21,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1601 transitions. [2022-12-13 15:56:21,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1601 transitions. [2022-12-13 15:56:21,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:56:21,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1601 transitions. [2022-12-13 15:56:21,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 400.25) internal successors, (1601), 4 states have internal predecessors, (1601), 0 states have call successors, (0), 0 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 15:56:21,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 858.0) internal successors, (4290), 5 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 15:56:21,663 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 858.0) internal successors, (4290), 5 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 15:56:21,664 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 403 flow. Second operand 4 states and 1601 transitions. [2022-12-13 15:56:21,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 260 transitions, 1373 flow [2022-12-13 15:56:21,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 260 transitions, 1336 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 15:56:21,706 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 476 flow [2022-12-13 15:56:21,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=858, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=476, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2022-12-13 15:56:21,707 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 9 predicate places. [2022-12-13 15:56:21,707 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 476 flow [2022-12-13 15:56:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 348.25) internal successors, (1393), 4 states have internal predecessors, (1393), 0 states have call successors, (0), 0 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 15:56:21,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:56:21,708 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:56:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:56:21,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-12-13 15:56:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:56:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash -557741445, now seen corresponding path program 2 times [2022-12-13 15:56:21,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:56:21,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063899479] [2022-12-13 15:56:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:56:21,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:56:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:56:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:56:21,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:56:21,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063899479] [2022-12-13 15:56:21,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063899479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:56:21,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:56:21,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:56:21,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609577316] [2022-12-13 15:56:21,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:56:21,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:56:21,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:56:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:56:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:56:21,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 858 [2022-12-13 15:56:21,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 344.6666666666667) internal successors, (2068), 6 states have internal predecessors, (2068), 0 states have call successors, (0), 0 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 15:56:21,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:56:21,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 858 [2022-12-13 15:56:21,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand