./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.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_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/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_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/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_5443e311-b158-4647-b401-32f847b562a5/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 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 --- 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 21:16:52,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:16:52,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:16:52,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:16:52,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:16:52,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:16:52,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:16:52,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:16:52,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:16:52,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:16:52,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:16:52,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:16:52,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:16:52,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:16:52,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:16:52,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:16:52,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:16:52,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:16:52,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:16:52,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:16:52,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:16:52,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:16:52,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:16:52,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:16:52,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:16:52,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:16:52,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:16:52,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:16:52,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:16:52,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:16:52,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:16:52,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:16:52,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:16:52,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:16:52,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:16:52,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:16:52,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:16:52,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:16:52,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:16:52,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:16:52,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:16:52,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:16:52,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:16:52,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:16:52,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:16:52,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:16:52,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:16:52,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:16:52,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:16:52,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:16:52,722 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:16:52,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:16:52,722 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:16:52,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:16:52,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:16:52,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:16:52,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:16:52,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:16:52,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:16:52,724 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:16:52,724 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_5443e311-b158-4647-b401-32f847b562a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 [2022-12-13 21:16:52,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:16:52,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:16:52,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:16:52,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:16:52,947 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:16:52,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i [2022-12-13 21:16:55,568 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:16:55,774 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:16:55,774 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i [2022-12-13 21:16:55,786 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/data/9f2e1cfb2/e54180539cc849eda84f7d1f3a939c4e/FLAG84a787d43 [2022-12-13 21:16:55,798 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/data/9f2e1cfb2/e54180539cc849eda84f7d1f3a939c4e [2022-12-13 21:16:55,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:16:55,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:16:55,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:16:55,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:16:55,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:16:55,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:16:55" (1/1) ... [2022-12-13 21:16:55,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1214187b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:55, skipping insertion in model container [2022-12-13 21:16:55,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:16:55" (1/1) ... [2022-12-13 21:16:55,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:16:55,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:16:56,184 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_5443e311-b158-4647-b401-32f847b562a5/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2022-12-13 21:16:56,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:16:56,219 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:16:56,254 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_5443e311-b158-4647-b401-32f847b562a5/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2022-12-13 21:16:56,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:16:56,308 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:16:56,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56 WrapperNode [2022-12-13 21:16:56,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:16:56,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:16:56,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:16:56,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:16:56,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,355 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 201 [2022-12-13 21:16:56,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:16:56,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:16:56,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:16:56,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:16:56,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,381 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:16:56,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:16:56,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:16:56,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:16:56,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (1/1) ... [2022-12-13 21:16:56,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:16:56,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:16:56,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:16:56,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:16:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:16:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:16:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:16:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:16:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 21:16:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:16:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 21:16:56,453 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 21:16:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:16:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:16:56,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:16:56,454 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 21:16:56,567 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:16:56,568 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:16:56,779 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:16:56,788 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:16:56,788 INFO L300 CfgBuilder]: Removed 22 assume(true) statements. [2022-12-13 21:16:56,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:16:56 BoogieIcfgContainer [2022-12-13 21:16:56,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:16:56,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:16:56,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:16:56,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:16:56,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:16:55" (1/3) ... [2022-12-13 21:16:56,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c46a6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:16:56, skipping insertion in model container [2022-12-13 21:16:56,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:16:56" (2/3) ... [2022-12-13 21:16:56,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c46a6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:16:56, skipping insertion in model container [2022-12-13 21:16:56,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:16:56" (3/3) ... [2022-12-13 21:16:56,799 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2022-12-13 21:16:56,807 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:16:56,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:16:56,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 21:16:56,815 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:16:56,860 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 21:16:56,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 206 transitions, 420 flow [2022-12-13 21:16:56,957 INFO L130 PetriNetUnfolder]: 43/278 cut-off events. [2022-12-13 21:16:56,957 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 21:16:56,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 278 events. 43/278 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 851 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2022-12-13 21:16:56,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 206 transitions, 420 flow [2022-12-13 21:16:56,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 199 transitions, 403 flow [2022-12-13 21:16:56,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:16:56,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 199 transitions, 403 flow [2022-12-13 21:16:56,980 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 199 transitions, 403 flow [2022-12-13 21:16:56,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 199 transitions, 403 flow [2022-12-13 21:16:57,016 INFO L130 PetriNetUnfolder]: 41/271 cut-off events. [2022-12-13 21:16:57,016 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:16:57,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 271 events. 41/271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 844 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 135. Up to 8 conditions per place. [2022-12-13 21:16:57,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 9048 [2022-12-13 21:17:01,389 INFO L134 LiptonReduction]: Checked pairs total: 18023 [2022-12-13 21:17:01,390 INFO L136 LiptonReduction]: Total number of compositions: 168 [2022-12-13 21:17:01,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:17:01,404 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;@4325f5fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:17:01,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 21:17:01,408 INFO L130 PetriNetUnfolder]: 6/23 cut-off events. [2022-12-13 21:17:01,408 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:17:01,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:01,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:17:01,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 21:17:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash 746042765, now seen corresponding path program 1 times [2022-12-13 21:17:01,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:01,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822665710] [2022-12-13 21:17:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:01,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:01,607 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 21:17:01,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:01,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822665710] [2022-12-13 21:17:01,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822665710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:01,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:01,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:17:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087758843] [2022-12-13 21:17:01,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:01,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:17:01,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:01,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:17:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:17:01,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 374 [2022-12-13 21:17:01,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 65 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 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 21:17:01,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:01,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 374 [2022-12-13 21:17:01,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:01,774 INFO L130 PetriNetUnfolder]: 280/593 cut-off events. [2022-12-13 21:17:01,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:17:01,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 593 events. 280/593 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2925 event pairs, 180 based on Foata normal form. 108/618 useless extension candidates. Maximal degree in co-relation 1112. Up to 514 conditions per place. [2022-12-13 21:17:01,777 INFO L137 encePairwiseOnDemand]: 348/374 looper letters, 46 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2022-12-13 21:17:01,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 213 flow [2022-12-13 21:17:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:17:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:17:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-12-13 21:17:01,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2022-12-13 21:17:01,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-12-13 21:17:01,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-12-13 21:17:01,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:01,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-12-13 21:17:01,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 21:17:01,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 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 21:17:01,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 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 21:17:01,801 INFO L175 Difference]: Start difference. First operand has 44 places, 65 transitions, 135 flow. Second operand 3 states and 605 transitions. [2022-12-13 21:17:01,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 213 flow [2022-12-13 21:17:01,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:17:01,805 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 97 flow [2022-12-13 21:17:01,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 21:17:01,809 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2022-12-13 21:17:01,809 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 97 flow [2022-12-13 21:17:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 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 21:17:01,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:01,810 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 21:17:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:17:01,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 21:17:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1628543341, now seen corresponding path program 1 times [2022-12-13 21:17:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007308085] [2022-12-13 21:17:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:17:01,836 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:17:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:17:01,864 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:17:01,864 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:17:01,865 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 21:17:01,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 21:17:01,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 21:17:01,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 21:17:01,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:17:01,868 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 21:17:01,870 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:17:01,870 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 21:17:01,891 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 21:17:01,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 266 transitions, 550 flow [2022-12-13 21:17:01,931 INFO L130 PetriNetUnfolder]: 72/435 cut-off events. [2022-12-13 21:17:01,931 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:17:01,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 435 events. 72/435 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1648 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 280. Up to 12 conditions per place. [2022-12-13 21:17:01,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 266 transitions, 550 flow [2022-12-13 21:17:01,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 264 transitions, 546 flow [2022-12-13 21:17:01,935 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:17:01,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 264 transitions, 546 flow [2022-12-13 21:17:01,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 264 transitions, 546 flow [2022-12-13 21:17:01,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 264 transitions, 546 flow [2022-12-13 21:17:01,971 INFO L130 PetriNetUnfolder]: 71/433 cut-off events. [2022-12-13 21:17:01,971 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:17:01,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 71/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1674 event pairs, 0 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 278. Up to 12 conditions per place. [2022-12-13 21:17:01,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 26100 [2022-12-13 21:17:06,794 INFO L134 LiptonReduction]: Checked pairs total: 58983 [2022-12-13 21:17:06,794 INFO L136 LiptonReduction]: Total number of compositions: 206 [2022-12-13 21:17:06,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:17:06,797 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;@4325f5fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:17:06,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 21:17:06,801 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2022-12-13 21:17:06,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:17:06,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:06,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:17:06,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 21:17:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1253637415, now seen corresponding path program 1 times [2022-12-13 21:17:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:06,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126059682] [2022-12-13 21:17:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:06,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:06,882 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 21:17:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:06,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126059682] [2022-12-13 21:17:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126059682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:06,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:06,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:17:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85292960] [2022-12-13 21:17:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:06,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:17:06,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:17:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:17:06,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 472 [2022-12-13 21:17:06,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 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 21:17:06,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:06,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 472 [2022-12-13 21:17:06,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:08,001 INFO L130 PetriNetUnfolder]: 10825/17699 cut-off events. [2022-12-13 21:17:08,001 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-12-13 21:17:08,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33913 conditions, 17699 events. 10825/17699 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 123841 event pairs, 4860 based on Foata normal form. 3286/18047 useless extension candidates. Maximal degree in co-relation 2727. Up to 16077 conditions per place. [2022-12-13 21:17:08,071 INFO L137 encePairwiseOnDemand]: 437/472 looper letters, 71 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 21:17:08,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 336 flow [2022-12-13 21:17:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:17:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:17:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2022-12-13 21:17:08,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5480225988700564 [2022-12-13 21:17:08,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2022-12-13 21:17:08,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2022-12-13 21:17:08,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:08,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2022-12-13 21:17:08,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 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 21:17:08,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 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 21:17:08,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 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 21:17:08,079 INFO L175 Difference]: Start difference. First operand has 69 places, 101 transitions, 220 flow. Second operand 3 states and 776 transitions. [2022-12-13 21:17:08,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 336 flow [2022-12-13 21:17:08,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:17:08,081 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 168 flow [2022-12-13 21:17:08,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2022-12-13 21:17:08,081 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2022-12-13 21:17:08,081 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 168 flow [2022-12-13 21:17:08,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 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 21:17:08,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:08,082 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:08,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:17:08,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 21:17:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1466157431, now seen corresponding path program 1 times [2022-12-13 21:17:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:08,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961059439] [2022-12-13 21:17:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:08,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:08,210 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 21:17:08,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:08,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961059439] [2022-12-13 21:17:08,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961059439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:08,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:08,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:17:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490877958] [2022-12-13 21:17:08,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:08,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:17:08,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:17:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:17:08,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 472 [2022-12-13 21:17:08,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 21:17:08,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:08,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 472 [2022-12-13 21:17:08,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:09,598 INFO L130 PetriNetUnfolder]: 13409/22311 cut-off events. [2022-12-13 21:17:09,598 INFO L131 PetriNetUnfolder]: For 788/788 co-relation queries the response was YES. [2022-12-13 21:17:09,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43846 conditions, 22311 events. 13409/22311 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 168051 event pairs, 4125 based on Foata normal form. 0/19400 useless extension candidates. Maximal degree in co-relation 43733. Up to 13276 conditions per place. [2022-12-13 21:17:09,654 INFO L137 encePairwiseOnDemand]: 459/472 looper letters, 124 selfloop transitions, 13 changer transitions 10/160 dead transitions. [2022-12-13 21:17:09,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 160 transitions, 670 flow [2022-12-13 21:17:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:17:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:17:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 997 transitions. [2022-12-13 21:17:09,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.528072033898305 [2022-12-13 21:17:09,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 997 transitions. [2022-12-13 21:17:09,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 997 transitions. [2022-12-13 21:17:09,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:09,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 997 transitions. [2022-12-13 21:17:09,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.25) internal successors, (997), 4 states have internal predecessors, (997), 0 states have call successors, (0), 0 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 21:17:09,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 472.0) internal successors, (2360), 5 states have internal predecessors, (2360), 0 states have call successors, (0), 0 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 21:17:09,661 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 472.0) internal successors, (2360), 5 states have internal predecessors, (2360), 0 states have call successors, (0), 0 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 21:17:09,661 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 168 flow. Second operand 4 states and 997 transitions. [2022-12-13 21:17:09,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 160 transitions, 670 flow [2022-12-13 21:17:09,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 160 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:17:09,664 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 272 flow [2022-12-13 21:17:09,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2022-12-13 21:17:09,664 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2022-12-13 21:17:09,664 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 272 flow [2022-12-13 21:17:09,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 21:17:09,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:09,665 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:09,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:17:09,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 21:17:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:09,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1049483407, now seen corresponding path program 1 times [2022-12-13 21:17:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:09,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903858079] [2022-12-13 21:17:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:09,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:09,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903858079] [2022-12-13 21:17:09,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903858079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:17:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196403358] [2022-12-13 21:17:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:09,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:17:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:17:09,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:17:09,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:17:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:17:09,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:17:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:09,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:17:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:09,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196403358] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:17:09,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:17:09,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 21:17:09,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122885907] [2022-12-13 21:17:09,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:17:09,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:17:09,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:17:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:17:09,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 472 [2022-12-13 21:17:09,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 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 21:17:09,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:09,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 472 [2022-12-13 21:17:09,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:10,219 INFO L130 PetriNetUnfolder]: 1405/2659 cut-off events. [2022-12-13 21:17:10,219 INFO L131 PetriNetUnfolder]: For 1241/1241 co-relation queries the response was YES. [2022-12-13 21:17:10,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6539 conditions, 2659 events. 1405/2659 cut-off events. For 1241/1241 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16886 event pairs, 280 based on Foata normal form. 310/2867 useless extension candidates. Maximal degree in co-relation 2803. Up to 1688 conditions per place. [2022-12-13 21:17:10,237 INFO L137 encePairwiseOnDemand]: 469/472 looper letters, 92 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2022-12-13 21:17:10,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 105 transitions, 528 flow [2022-12-13 21:17:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:17:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:17:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1179 transitions. [2022-12-13 21:17:10,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49957627118644066 [2022-12-13 21:17:10,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1179 transitions. [2022-12-13 21:17:10,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1179 transitions. [2022-12-13 21:17:10,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:10,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1179 transitions. [2022-12-13 21:17:10,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 0 states have call successors, (0), 0 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 21:17:10,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 472.0) internal successors, (2832), 6 states have internal predecessors, (2832), 0 states have call successors, (0), 0 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 21:17:10,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 472.0) internal successors, (2832), 6 states have internal predecessors, (2832), 0 states have call successors, (0), 0 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 21:17:10,253 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 272 flow. Second operand 5 states and 1179 transitions. [2022-12-13 21:17:10,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 105 transitions, 528 flow [2022-12-13 21:17:10,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 105 transitions, 526 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 21:17:10,259 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 182 flow [2022-12-13 21:17:10,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2022-12-13 21:17:10,260 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2022-12-13 21:17:10,260 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 182 flow [2022-12-13 21:17:10,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 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 21:17:10,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:10,262 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 21:17:10,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:17:10,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:17:10,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 21:17:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash 65859779, now seen corresponding path program 1 times [2022-12-13 21:17:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:10,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824164015] [2022-12-13 21:17:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:17:10,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:17:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:17:10,501 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:17:10,501 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:17:10,501 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 21:17:10,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 21:17:10,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 21:17:10,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 21:17:10,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 21:17:10,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:17:10,502 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 21:17:10,502 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:17:10,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 21:17:10,528 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 21:17:10,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 326 transitions, 682 flow [2022-12-13 21:17:10,609 INFO L130 PetriNetUnfolder]: 106/625 cut-off events. [2022-12-13 21:17:10,609 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 21:17:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 625 events. 106/625 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2627 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 443. Up to 16 conditions per place. [2022-12-13 21:17:10,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 326 transitions, 682 flow [2022-12-13 21:17:10,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 324 transitions, 678 flow [2022-12-13 21:17:10,617 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:17:10,617 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 324 transitions, 678 flow [2022-12-13 21:17:10,617 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 324 transitions, 678 flow [2022-12-13 21:17:10,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 324 transitions, 678 flow [2022-12-13 21:17:10,693 INFO L130 PetriNetUnfolder]: 105/623 cut-off events. [2022-12-13 21:17:10,693 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 21:17:10,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 623 events. 105/623 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2651 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2022-12-13 21:17:10,711 INFO L119 LiptonReduction]: Number of co-enabled transitions 49764 [2022-12-13 21:17:16,881 INFO L134 LiptonReduction]: Checked pairs total: 107037 [2022-12-13 21:17:16,882 INFO L136 LiptonReduction]: Total number of compositions: 255 [2022-12-13 21:17:16,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:17:16,883 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;@4325f5fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:17:16,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 21:17:16,885 INFO L130 PetriNetUnfolder]: 6/21 cut-off events. [2022-12-13 21:17:16,885 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:17:16,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:16,885 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:17:16,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:17:16,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1864992432, now seen corresponding path program 1 times [2022-12-13 21:17:16,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:16,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707151312] [2022-12-13 21:17:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:16,914 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 21:17:16,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:16,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707151312] [2022-12-13 21:17:16,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707151312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:16,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:16,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:17:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205833522] [2022-12-13 21:17:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:16,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:17:16,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:17:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:17:16,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 581 [2022-12-13 21:17:16,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 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 21:17:16,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:16,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 581 [2022-12-13 21:17:16,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:34,629 INFO L130 PetriNetUnfolder]: 235625/326229 cut-off events. [2022-12-13 21:17:34,629 INFO L131 PetriNetUnfolder]: For 3262/3262 co-relation queries the response was YES. [2022-12-13 21:17:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633082 conditions, 326229 events. 235625/326229 cut-off events. For 3262/3262 co-relation queries the response was YES. Maximal size of possible extension queue 8106. Compared 2453368 event pairs, 178022 based on Foata normal form. 65783/343696 useless extension candidates. Maximal degree in co-relation 87494. Up to 304854 conditions per place. [2022-12-13 21:17:35,791 INFO L137 encePairwiseOnDemand]: 537/581 looper letters, 85 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2022-12-13 21:17:35,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 410 flow [2022-12-13 21:17:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:17:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:17:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2022-12-13 21:17:35,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5375788869764774 [2022-12-13 21:17:35,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2022-12-13 21:17:35,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2022-12-13 21:17:35,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:35,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2022-12-13 21:17:35,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 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 21:17:35,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 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 21:17:35,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 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 21:17:35,799 INFO L175 Difference]: Start difference. First operand has 87 places, 128 transitions, 286 flow. Second operand 3 states and 937 transitions. [2022-12-13 21:17:35,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 410 flow [2022-12-13 21:17:35,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 103 transitions, 410 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:17:35,802 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2022-12-13 21:17:35,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2022-12-13 21:17:35,803 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2022-12-13 21:17:35,803 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2022-12-13 21:17:35,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 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 21:17:35,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:35,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:35,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:17:35,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:17:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash 601898281, now seen corresponding path program 1 times [2022-12-13 21:17:35,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:35,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307538009] [2022-12-13 21:17:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:35,883 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 21:17:35,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:35,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307538009] [2022-12-13 21:17:35,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307538009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:35,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:35,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:17:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069922070] [2022-12-13 21:17:35,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:17:35,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:17:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:17:35,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 581 [2022-12-13 21:17:35,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 257.75) internal successors, (1031), 4 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 21:17:35,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:35,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 581 [2022-12-13 21:17:35,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:57,783 INFO L130 PetriNetUnfolder]: 298167/419758 cut-off events. [2022-12-13 21:17:57,783 INFO L131 PetriNetUnfolder]: For 14229/14229 co-relation queries the response was YES. [2022-12-13 21:17:58,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832322 conditions, 419758 events. 298167/419758 cut-off events. For 14229/14229 co-relation queries the response was YES. Maximal size of possible extension queue 11914. Compared 3411631 event pairs, 77598 based on Foata normal form. 0/371538 useless extension candidates. Maximal degree in co-relation 832213. Up to 276139 conditions per place. [2022-12-13 21:17:59,524 INFO L137 encePairwiseOnDemand]: 565/581 looper letters, 169 selfloop transitions, 17 changer transitions 0/202 dead transitions. [2022-12-13 21:17:59,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 202 transitions, 864 flow [2022-12-13 21:17:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:17:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:17:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1214 transitions. [2022-12-13 21:17:59,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5223752151462995 [2022-12-13 21:17:59,528 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1214 transitions. [2022-12-13 21:17:59,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1214 transitions. [2022-12-13 21:17:59,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:59,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1214 transitions. [2022-12-13 21:17:59,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 303.5) internal successors, (1214), 4 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 21:17:59,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 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 21:17:59,533 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 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 21:17:59,533 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 4 states and 1214 transitions. [2022-12-13 21:17:59,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 202 transitions, 864 flow [2022-12-13 21:17:59,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 202 transitions, 861 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:17:59,546 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 350 flow [2022-12-13 21:17:59,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2022-12-13 21:17:59,547 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2022-12-13 21:17:59,548 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 350 flow [2022-12-13 21:17:59,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.75) internal successors, (1031), 4 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 21:17:59,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:59,548 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:59,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 21:17:59,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:17:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash 251076786, now seen corresponding path program 1 times [2022-12-13 21:17:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:59,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682108294] [2022-12-13 21:17:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:59,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682108294] [2022-12-13 21:17:59,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682108294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:17:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516500753] [2022-12-13 21:17:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:59,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:17:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:17:59,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:17:59,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:17:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:17:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:17:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:59,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:17:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:59,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516500753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:17:59,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:17:59,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 21:17:59,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784557299] [2022-12-13 21:17:59,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:17:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:17:59,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:59,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:17:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:17:59,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 581 [2022-12-13 21:17:59,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 350 flow. Second operand has 6 states, 6 states have (on average 267.1666666666667) internal successors, (1603), 6 states have internal predecessors, (1603), 0 states have call successors, (0), 0 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 21:17:59,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:59,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 581 [2022-12-13 21:17:59,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:18:02,864 INFO L130 PetriNetUnfolder]: 34450/52973 cut-off events. [2022-12-13 21:18:02,864 INFO L131 PetriNetUnfolder]: For 29351/29351 co-relation queries the response was YES. [2022-12-13 21:18:02,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135532 conditions, 52973 events. 34450/52973 cut-off events. For 29351/29351 co-relation queries the response was YES. Maximal size of possible extension queue 2107. Compared 414248 event pairs, 2925 based on Foata normal form. 4729/55239 useless extension candidates. Maximal degree in co-relation 21606. Up to 33758 conditions per place. [2022-12-13 21:18:03,089 INFO L137 encePairwiseOnDemand]: 578/581 looper letters, 162 selfloop transitions, 4 changer transitions 0/179 dead transitions. [2022-12-13 21:18:03,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 179 transitions, 925 flow [2022-12-13 21:18:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:18:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:18:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1731 transitions. [2022-12-13 21:18:03,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4965576592082616 [2022-12-13 21:18:03,093 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1731 transitions. [2022-12-13 21:18:03,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1731 transitions. [2022-12-13 21:18:03,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:18:03,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1731 transitions. [2022-12-13 21:18:03,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.5) internal successors, (1731), 6 states have internal predecessors, (1731), 0 states have call successors, (0), 0 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 21:18:03,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 581.0) internal successors, (4067), 7 states have internal predecessors, (4067), 0 states have call successors, (0), 0 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 21:18:03,100 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 581.0) internal successors, (4067), 7 states have internal predecessors, (4067), 0 states have call successors, (0), 0 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 21:18:03,100 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 350 flow. Second operand 6 states and 1731 transitions. [2022-12-13 21:18:03,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 179 transitions, 925 flow [2022-12-13 21:18:03,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 179 transitions, 919 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 21:18:03,116 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 265 flow [2022-12-13 21:18:03,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2022-12-13 21:18:03,117 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2022-12-13 21:18:03,117 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 265 flow [2022-12-13 21:18:03,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 267.1666666666667) internal successors, (1603), 6 states have internal predecessors, (1603), 0 states have call successors, (0), 0 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 21:18:03,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:18:03,118 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 21:18:03,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:18:03,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5443e311-b158-4647-b401-32f847b562a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:18:03,320 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 21:18:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:18:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1440488526, now seen corresponding path program 1 times [2022-12-13 21:18:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:18:03,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024036813] [2022-12-13 21:18:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:18:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:18:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:18:03,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:18:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:18:03,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:18:03,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:18:03,380 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 21:18:03,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 21:18:03,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 21:18:03,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 21:18:03,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 21:18:03,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 21:18:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 21:18:03,381 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 21:18:03,382 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:18:03,382 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 21:18:03,405 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 21:18:03,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 386 transitions, 816 flow [2022-12-13 21:18:03,509 INFO L130 PetriNetUnfolder]: 152/883 cut-off events. [2022-12-13 21:18:03,509 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 21:18:03,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 883 events. 152/883 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4006 event pairs, 6 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 645. Up to 32 conditions per place. [2022-12-13 21:18:03,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 386 transitions, 816 flow [2022-12-13 21:18:03,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 384 transitions, 812 flow [2022-12-13 21:18:03,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:18:03,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 384 transitions, 812 flow [2022-12-13 21:18:03,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 384 transitions, 812 flow [2022-12-13 21:18:03,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 384 transitions, 812 flow [2022-12-13 21:18:03,621 INFO L130 PetriNetUnfolder]: 151/881 cut-off events. [2022-12-13 21:18:03,621 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 21:18:03,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 881 events. 151/881 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4028 event pairs, 6 based on Foata normal form. 0/721 useless extension candidates. Maximal degree in co-relation 643. Up to 32 conditions per place. [2022-12-13 21:18:03,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 80504 [2022-12-13 21:18:09,007 INFO L134 LiptonReduction]: Checked pairs total: 191759 [2022-12-13 21:18:09,007 INFO L136 LiptonReduction]: Total number of compositions: 295 [2022-12-13 21:18:09,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:18:09,009 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;@4325f5fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:18:09,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 21:18:09,012 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2022-12-13 21:18:09,012 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:18:09,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:18:09,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:18:09,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 21:18:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:18:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1723093961, now seen corresponding path program 1 times [2022-12-13 21:18:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:18:09,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631377042] [2022-12-13 21:18:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:18:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:18:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:18:09,048 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 21:18:09,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:18:09,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631377042] [2022-12-13 21:18:09,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631377042] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:18:09,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:18:09,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:18:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040902983] [2022-12-13 21:18:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:18:09,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:18:09,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:18:09,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:18:09,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:18:09,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 681 [2022-12-13 21:18:09,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 166 transitions, 376 flow. Second operand has 3 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 21:18:09,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:18:09,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 681 [2022-12-13 21:18:09,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand