./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP --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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:59:07,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:59:07,239 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:59:07,244 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:59:07,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:59:07,270 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:59:07,271 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:59:07,272 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:59:07,273 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:59:07,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:59:07,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:59:07,275 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:59:07,276 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:59:07,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:59:07,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:59:07,278 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:59:07,279 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:59:07,279 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:59:07,280 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:59:07,281 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:59:07,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:59:07,282 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:59:07,283 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:59:07,283 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:59:07,284 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:59:07,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:59:07,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:59:07,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:59:07,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:07,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:59:07,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:59:07,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:59:07,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:59:07,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:59:07,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:59:07,291 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:59:07,291 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:59:07,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:59:07,292 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:59:07,293 INFO L153 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_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2023-11-06 22:59:07,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:59:07,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:59:07,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:59:07,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:59:07,579 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:59:07,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2023-11-06 22:59:10,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:59:11,088 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:59:11,088 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2023-11-06 22:59:11,106 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/data/81f8dd9cc/20ee40331a404d638fdf8ce23e6150bd/FLAG4c09e7de1 [2023-11-06 22:59:11,122 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/data/81f8dd9cc/20ee40331a404d638fdf8ce23e6150bd [2023-11-06 22:59:11,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:59:11,125 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:59:11,127 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:11,127 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:59:11,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:59:11,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4704b63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11, skipping insertion in model container [2023-11-06 22:59:11,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,199 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:59:11,661 WARN L240 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_43cbd523-1acd-4257-9845-dab6acfaf62d/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-11-06 22:59:11,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:11,720 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:59:11,763 WARN L240 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_43cbd523-1acd-4257-9845-dab6acfaf62d/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-11-06 22:59:11,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:11,845 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:59:11,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11 WrapperNode [2023-11-06 22:59:11,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:11,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:11,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:59:11,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:59:11,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,912 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 249 [2023-11-06 22:59:11,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:11,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:59:11,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:59:11,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:59:11,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,966 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:59:11,967 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:59:11,967 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:59:11,968 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:59:11,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (1/1) ... [2023-11-06 22:59:11,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:12,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:12,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:59:12,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:59:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:59:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:59:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:59:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:59:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:59:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:59:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:59:12,088 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:59:12,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:59:12,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:59:12,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:59:12,090 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:59:12,336 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:59:12,339 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:59:12,754 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:59:12,765 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:59:12,765 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-06 22:59:12,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:12 BoogieIcfgContainer [2023-11-06 22:59:12,790 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:59:12,793 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:59:12,793 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:59:12,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:59:12,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:59:11" (1/3) ... [2023-11-06 22:59:12,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73079663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:12, skipping insertion in model container [2023-11-06 22:59:12,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:11" (2/3) ... [2023-11-06 22:59:12,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73079663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:12, skipping insertion in model container [2023-11-06 22:59:12,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:12" (3/3) ... [2023-11-06 22:59:12,800 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-11-06 22:59:12,810 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:59:12,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:59:12,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-06 22:59:12,823 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:59:12,960 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:59:13,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 254 transitions, 515 flow [2023-11-06 22:59:13,149 INFO L124 PetriNetUnfolderBase]: 73/394 cut-off events. [2023-11-06 22:59:13,149 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:59:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1779 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2023-11-06 22:59:13,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 254 transitions, 515 flow [2023-11-06 22:59:13,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 249 transitions, 502 flow [2023-11-06 22:59:13,174 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:59:13,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 249 transitions, 502 flow [2023-11-06 22:59:13,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 249 transitions, 502 flow [2023-11-06 22:59:13,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 249 transitions, 502 flow [2023-11-06 22:59:13,263 INFO L124 PetriNetUnfolderBase]: 72/389 cut-off events. [2023-11-06 22:59:13,263 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:13,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 389 events. 72/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1727 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2023-11-06 22:59:13,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 21024 [2023-11-06 22:59:17,064 INFO L134 LiptonReduction]: Checked pairs total: 33802 [2023-11-06 22:59:17,064 INFO L136 LiptonReduction]: Total number of compositions: 197 [2023-11-06 22:59:17,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:59:17,088 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;@78ca916, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:59:17,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:59:17,096 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:59:17,096 INFO L124 PetriNetUnfolderBase]: 12/39 cut-off events. [2023-11-06 22:59:17,096 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:17,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:17,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:17,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:59:17,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1491114038, now seen corresponding path program 1 times [2023-11-06 22:59:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:17,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468907190] [2023-11-06 22:59:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:17,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:17,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468907190] [2023-11-06 22:59:17,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468907190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:17,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:17,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:17,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793434139] [2023-11-06 22:59:17,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:17,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:17,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:17,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:17,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:17,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 451 [2023-11-06 22:59:17,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 98 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:17,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 451 [2023-11-06 22:59:17,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:17,909 INFO L124 PetriNetUnfolderBase]: 631/1309 cut-off events. [2023-11-06 22:59:17,909 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:17,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 1309 events. 631/1309 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7287 event pairs, 512 based on Foata normal form. 190/1257 useless extension candidates. Maximal degree in co-relation 2385. Up to 1159 conditions per place. [2023-11-06 22:59:17,920 INFO L140 encePairwiseOnDemand]: 416/451 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-06 22:59:17,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 248 flow [2023-11-06 22:59:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 703 transitions. [2023-11-06 22:59:17,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195861049519586 [2023-11-06 22:59:17,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 703 transitions. [2023-11-06 22:59:17,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 703 transitions. [2023-11-06 22:59:17,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:17,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 703 transitions. [2023-11-06 22:59:17,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:17,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:17,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:17,973 INFO L175 Difference]: Start difference. First operand has 63 places, 98 transitions, 200 flow. Second operand 3 states and 703 transitions. [2023-11-06 22:59:17,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 248 flow [2023-11-06 22:59:17,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:17,980 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 148 flow [2023-11-06 22:59:17,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2023-11-06 22:59:17,986 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-06 22:59:17,987 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 148 flow [2023-11-06 22:59:17,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:17,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:17,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:59:17,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:59:17,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 907779798, now seen corresponding path program 1 times [2023-11-06 22:59:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027625469] [2023-11-06 22:59:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:59:18,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:18,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027625469] [2023-11-06 22:59:18,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027625469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:18,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176300866] [2023-11-06 22:59:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:18,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:18,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:18,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:18,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:59:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:18,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:59:18,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:59:18,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:59:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176300866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:18,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:18,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:59:18,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349809119] [2023-11-06 22:59:18,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:18,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:59:18,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:59:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:59:18,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 451 [2023-11-06 22:59:18,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:18,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 451 [2023-11-06 22:59:18,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:18,667 INFO L124 PetriNetUnfolderBase]: 631/1312 cut-off events. [2023-11-06 22:59:18,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:18,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1312 events. 631/1312 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7293 event pairs, 512 based on Foata normal form. 0/1070 useless extension candidates. Maximal degree in co-relation 2477. Up to 1159 conditions per place. [2023-11-06 22:59:18,676 INFO L140 encePairwiseOnDemand]: 448/451 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-11-06 22:59:18,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 276 flow [2023-11-06 22:59:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:59:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:59:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1285 transitions. [2023-11-06 22:59:18,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47487065779748705 [2023-11-06 22:59:18,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1285 transitions. [2023-11-06 22:59:18,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1285 transitions. [2023-11-06 22:59:18,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:18,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1285 transitions. [2023-11-06 22:59:18,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.16666666666666) internal successors, (1285), 6 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 451.0) internal successors, (3157), 7 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,706 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 451.0) internal successors, (3157), 7 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,706 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 148 flow. Second operand 6 states and 1285 transitions. [2023-11-06 22:59:18,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 276 flow [2023-11-06 22:59:18,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:18,711 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 180 flow [2023-11-06 22:59:18,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-11-06 22:59:18,712 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-11-06 22:59:18,712 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 180 flow [2023-11-06 22:59:18,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:18,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:18,714 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-06 22:59:18,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:59:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:18,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:59:18,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:18,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1036611949, now seen corresponding path program 2 times [2023-11-06 22:59:18,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:18,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031511866] [2023-11-06 22:59:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:59:19,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031511866] [2023-11-06 22:59:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031511866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966369422] [2023-11-06 22:59:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:59:19,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:19,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:19,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:59:19,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:19,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:19,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:19,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:59:19,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:59:19,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966369422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:19,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:59:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644593526] [2023-11-06 22:59:19,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:19,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:59:19,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:59:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:59:19,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 451 [2023-11-06 22:59:19,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 205.30769230769232) internal successors, (2669), 13 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:19,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:19,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 451 [2023-11-06 22:59:19,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:19,774 INFO L124 PetriNetUnfolderBase]: 631/1318 cut-off events. [2023-11-06 22:59:19,774 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:59:19,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 1318 events. 631/1318 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7279 event pairs, 512 based on Foata normal form. 6/1083 useless extension candidates. Maximal degree in co-relation 2468. Up to 1159 conditions per place. [2023-11-06 22:59:19,784 INFO L140 encePairwiseOnDemand]: 448/451 looper letters, 53 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-11-06 22:59:19,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 76 transitions, 344 flow [2023-11-06 22:59:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:59:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:59:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2518 transitions. [2023-11-06 22:59:19,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46526237989652625 [2023-11-06 22:59:19,794 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2518 transitions. [2023-11-06 22:59:19,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2518 transitions. [2023-11-06 22:59:19,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:19,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2518 transitions. [2023-11-06 22:59:19,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.83333333333334) internal successors, (2518), 12 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:19,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 451.0) internal successors, (5863), 13 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:19,822 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 451.0) internal successors, (5863), 13 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:19,822 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 180 flow. Second operand 12 states and 2518 transitions. [2023-11-06 22:59:19,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 76 transitions, 344 flow [2023-11-06 22:59:19,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 330 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:19,826 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 250 flow [2023-11-06 22:59:19,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-06 22:59:19,828 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2023-11-06 22:59:19,828 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 250 flow [2023-11-06 22:59:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 205.30769230769232) internal successors, (2669), 13 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:19,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:19,830 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 22:59:19,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:20,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:20,037 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 22:59:20,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2068015181, now seen corresponding path program 3 times [2023-11-06 22:59:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357539476] [2023-11-06 22:59:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:20,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:59:20,077 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:59:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:59:20,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:59:20,129 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:59:20,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:59:20,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:59:20,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:59:20,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:59:20,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:59:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:59:20,134 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-06 22:59:20,137 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:59:20,137 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:59:20,193 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:59:20,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 672 flow [2023-11-06 22:59:20,289 INFO L124 PetriNetUnfolderBase]: 118/634 cut-off events. [2023-11-06 22:59:20,290 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:59:20,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 634 events. 118/634 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3311 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2023-11-06 22:59:20,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 672 flow [2023-11-06 22:59:20,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 672 flow [2023-11-06 22:59:20,308 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:59:20,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 328 transitions, 672 flow [2023-11-06 22:59:20,309 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 328 transitions, 672 flow [2023-11-06 22:59:20,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 672 flow [2023-11-06 22:59:20,396 INFO L124 PetriNetUnfolderBase]: 118/634 cut-off events. [2023-11-06 22:59:20,396 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:59:20,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 634 events. 118/634 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3311 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2023-11-06 22:59:20,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 54000 [2023-11-06 22:59:24,591 INFO L134 LiptonReduction]: Checked pairs total: 88144 [2023-11-06 22:59:24,593 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-06 22:59:24,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:59:24,607 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;@78ca916, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:59:24,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:59:24,612 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:59:24,612 INFO L124 PetriNetUnfolderBase]: 15/44 cut-off events. [2023-11-06 22:59:24,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:24,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:24,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:24,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-06 22:59:24,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:24,615 INFO L85 PathProgramCache]: Analyzing trace with hash 938920425, now seen corresponding path program 1 times [2023-11-06 22:59:24,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:24,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163740650] [2023-11-06 22:59:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:24,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:24,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:24,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163740650] [2023-11-06 22:59:24,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163740650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:24,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:24,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:24,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005753886] [2023-11-06 22:59:24,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:24,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:24,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:24,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 587 [2023-11-06 22:59:24,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 135 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:24,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:24,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 587 [2023-11-06 22:59:24,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:28,364 INFO L124 PetriNetUnfolderBase]: 19933/30665 cut-off events. [2023-11-06 22:59:28,365 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-06 22:59:28,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58978 conditions, 30665 events. 19933/30665 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 212586 event pairs, 17166 based on Foata normal form. 5463/30479 useless extension candidates. Maximal degree in co-relation 20163. Up to 28224 conditions per place. [2023-11-06 22:59:28,602 INFO L140 encePairwiseOnDemand]: 541/587 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-06 22:59:28,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 352 flow [2023-11-06 22:59:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-11-06 22:59:28,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173197047132311 [2023-11-06 22:59:28,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-11-06 22:59:28,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-11-06 22:59:28,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:28,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-11-06 22:59:28,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:28,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:28,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:28,616 INFO L175 Difference]: Start difference. First operand has 87 places, 135 transitions, 286 flow. Second operand 3 states and 911 transitions. [2023-11-06 22:59:28,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 352 flow [2023-11-06 22:59:28,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:28,625 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 212 flow [2023-11-06 22:59:28,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-11-06 22:59:28,628 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-11-06 22:59:28,628 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 212 flow [2023-11-06 22:59:28,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:28,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:28,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:28,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:59:28,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-06 22:59:28,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:28,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1603885555, now seen corresponding path program 1 times [2023-11-06 22:59:28,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:28,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374394086] [2023-11-06 22:59:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:28,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:28,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374394086] [2023-11-06 22:59:28,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374394086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975398279] [2023-11-06 22:59:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:28,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:28,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:28,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:59:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:28,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:59:28,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:28,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:28,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975398279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:28,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:59:28,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:59:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849821072] [2023-11-06 22:59:28,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:28,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:28,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:28,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 587 [2023-11-06 22:59:28,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:28,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:28,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 587 [2023-11-06 22:59:28,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:31,591 INFO L124 PetriNetUnfolderBase]: 20076/30845 cut-off events. [2023-11-06 22:59:31,591 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-06 22:59:31,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59136 conditions, 30845 events. 20076/30845 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 212961 event pairs, 11814 based on Foata normal form. 0/25256 useless extension candidates. Maximal degree in co-relation 59123. Up to 28177 conditions per place. [2023-11-06 22:59:31,856 INFO L140 encePairwiseOnDemand]: 584/587 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-06 22:59:31,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 434 flow [2023-11-06 22:59:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2023-11-06 22:59:31,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025553662691652 [2023-11-06 22:59:31,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2023-11-06 22:59:31,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2023-11-06 22:59:31,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:31,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2023-11-06 22:59:31,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:31,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:31,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:31,871 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 212 flow. Second operand 3 states and 885 transitions. [2023-11-06 22:59:31,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 434 flow [2023-11-06 22:59:31,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 430 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:31,881 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 220 flow [2023-11-06 22:59:31,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-11-06 22:59:31,885 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-11-06 22:59:31,885 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 220 flow [2023-11-06 22:59:31,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:31,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:31,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:31,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:32,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:32,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-06 22:59:32,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:32,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1602755170, now seen corresponding path program 1 times [2023-11-06 22:59:32,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:32,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739016275] [2023-11-06 22:59:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:32,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:32,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:32,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739016275] [2023-11-06 22:59:32,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739016275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:32,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342747645] [2023-11-06 22:59:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:32,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:32,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:32,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:32,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:59:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:32,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:59:32,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:32,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:32,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342747645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:32,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:32,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:59:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655194706] [2023-11-06 22:59:32,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:32,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:59:32,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:32,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:59:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:59:32,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 587 [2023-11-06 22:59:32,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 265.14285714285717) internal successors, (1856), 7 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:32,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:32,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 587 [2023-11-06 22:59:32,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:35,310 INFO L124 PetriNetUnfolderBase]: 20049/30704 cut-off events. [2023-11-06 22:59:35,310 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-11-06 22:59:35,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59593 conditions, 30704 events. 20049/30704 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 211048 event pairs, 17166 based on Foata normal form. 3/25261 useless extension candidates. Maximal degree in co-relation 59565. Up to 28195 conditions per place. [2023-11-06 22:59:35,486 INFO L140 encePairwiseOnDemand]: 584/587 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-11-06 22:59:35,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 390 flow [2023-11-06 22:59:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:59:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:59:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1659 transitions. [2023-11-06 22:59:35,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47103918228279384 [2023-11-06 22:59:35,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1659 transitions. [2023-11-06 22:59:35,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1659 transitions. [2023-11-06 22:59:35,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:35,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1659 transitions. [2023-11-06 22:59:35,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.5) internal successors, (1659), 6 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:35,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:35,523 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:35,523 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 220 flow. Second operand 6 states and 1659 transitions. [2023-11-06 22:59:35,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 390 flow [2023-11-06 22:59:35,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:35,528 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 254 flow [2023-11-06 22:59:35,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-11-06 22:59:35,530 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-11-06 22:59:35,531 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 254 flow [2023-11-06 22:59:35,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.14285714285717) internal successors, (1856), 7 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:35,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:35,532 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:35,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:59:35,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-06 22:59:35,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash -178246790, now seen corresponding path program 2 times [2023-11-06 22:59:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261785804] [2023-11-06 22:59:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:35,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261785804] [2023-11-06 22:59:35,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261785804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901608465] [2023-11-06 22:59:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:59:35,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:35,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:59:35,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:59:35,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:35,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:59:35,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:35,984 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-06 22:59:36,043 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:59:36,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:59:36,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-06 22:59:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:59:36,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:59:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901608465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:36,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:59:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-06 22:59:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497199486] [2023-11-06 22:59:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:59:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:59:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:59:36,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 587 [2023-11-06 22:59:36,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:36,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:36,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 587 [2023-11-06 22:59:36,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:40,193 INFO L124 PetriNetUnfolderBase]: 24612/38875 cut-off events. [2023-11-06 22:59:40,193 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2023-11-06 22:59:40,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75551 conditions, 38875 events. 24612/38875 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 291097 event pairs, 4085 based on Foata normal form. 0/32225 useless extension candidates. Maximal degree in co-relation 75515. Up to 27906 conditions per place. [2023-11-06 22:59:40,385 INFO L140 encePairwiseOnDemand]: 576/587 looper letters, 188 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2023-11-06 22:59:40,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 224 transitions, 951 flow [2023-11-06 22:59:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:59:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:59:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1709 transitions. [2023-11-06 22:59:40,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852356615559341 [2023-11-06 22:59:40,394 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1709 transitions. [2023-11-06 22:59:40,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1709 transitions. [2023-11-06 22:59:40,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:40,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1709 transitions. [2023-11-06 22:59:40,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.8333333333333) internal successors, (1709), 6 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,412 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,412 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 254 flow. Second operand 6 states and 1709 transitions. [2023-11-06 22:59:40,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 224 transitions, 951 flow [2023-11-06 22:59:40,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 224 transitions, 937 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:40,419 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 349 flow [2023-11-06 22:59:40,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2023-11-06 22:59:40,420 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 19 predicate places. [2023-11-06 22:59:40,420 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 349 flow [2023-11-06 22:59:40,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:40,422 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:40,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:40,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:59:40,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-06 22:59:40,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:40,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2036350279, now seen corresponding path program 1 times [2023-11-06 22:59:40,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:40,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609473574] [2023-11-06 22:59:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:40,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:59:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609473574] [2023-11-06 22:59:40,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609473574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147591290] [2023-11-06 22:59:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:40,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:40,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:40,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:40,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:59:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:40,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:40,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:40,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147591290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:40,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-06 22:59:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639032859] [2023-11-06 22:59:40,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:40,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:59:40,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:59:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:59:41,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 587 [2023-11-06 22:59:41,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 349 flow. Second operand has 14 states, 14 states have (on average 260.92857142857144) internal successors, (3653), 14 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:41,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 587 [2023-11-06 22:59:41,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:44,889 INFO L124 PetriNetUnfolderBase]: 24706/38917 cut-off events. [2023-11-06 22:59:44,890 INFO L125 PetriNetUnfolderBase]: For 7602/7602 co-relation queries the response was YES. [2023-11-06 22:59:45,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83543 conditions, 38917 events. 24706/38917 cut-off events. For 7602/7602 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 293881 event pairs, 341 based on Foata normal form. 31/34403 useless extension candidates. Maximal degree in co-relation 83485. Up to 34896 conditions per place. [2023-11-06 22:59:45,120 INFO L140 encePairwiseOnDemand]: 582/587 looper letters, 146 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2023-11-06 22:59:45,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 873 flow [2023-11-06 22:59:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:59:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:59:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3769 transitions. [2023-11-06 22:59:45,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586274032611341 [2023-11-06 22:59:45,135 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3769 transitions. [2023-11-06 22:59:45,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3769 transitions. [2023-11-06 22:59:45,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:45,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3769 transitions. [2023-11-06 22:59:45,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 269.2142857142857) internal successors, (3769), 14 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 587.0) internal successors, (8805), 15 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,169 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 587.0) internal successors, (8805), 15 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,170 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 349 flow. Second operand 14 states and 3769 transitions. [2023-11-06 22:59:45,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 873 flow [2023-11-06 22:59:45,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 873 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:45,207 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 419 flow [2023-11-06 22:59:45,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=419, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-11-06 22:59:45,208 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 33 predicate places. [2023-11-06 22:59:45,208 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 419 flow [2023-11-06 22:59:45,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 260.92857142857144) internal successors, (3653), 14 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:45,210 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:59:45,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:45,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cbd523-1acd-4257-9845-dab6acfaf62d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:59:45,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-06 22:59:45,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1809650332, now seen corresponding path program 1 times [2023-11-06 22:59:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:45,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074710097] [2023-11-06 22:59:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:59:45,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:59:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:59:45,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:59:45,494 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:59:45,495 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 22:59:45,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 22:59:45,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 22:59:45,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 22:59:45,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 22:59:45,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 22:59:45,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:59:45,496 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-11-06 22:59:45,497 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:59:45,497 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:59:45,547 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:59:45,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 402 transitions, 831 flow [2023-11-06 22:59:45,734 INFO L124 PetriNetUnfolderBase]: 168/909 cut-off events. [2023-11-06 22:59:45,734 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:59:45,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 909 events. 168/909 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5043 event pairs, 1 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 642. Up to 16 conditions per place. [2023-11-06 22:59:45,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 402 transitions, 831 flow [2023-11-06 22:59:45,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 402 transitions, 831 flow [2023-11-06 22:59:45,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:59:45,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 402 transitions, 831 flow [2023-11-06 22:59:45,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 402 transitions, 831 flow [2023-11-06 22:59:45,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 402 transitions, 831 flow [2023-11-06 22:59:45,941 INFO L124 PetriNetUnfolderBase]: 168/909 cut-off events. [2023-11-06 22:59:45,941 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:59:45,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 909 events. 168/909 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5043 event pairs, 1 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 642. Up to 16 conditions per place. [2023-11-06 22:59:46,143 INFO L119 LiptonReduction]: Number of co-enabled transitions 97200 [2023-11-06 22:59:50,839 INFO L134 LiptonReduction]: Checked pairs total: 164912 [2023-11-06 22:59:50,840 INFO L136 LiptonReduction]: Total number of compositions: 306 [2023-11-06 22:59:50,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:59:50,844 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;@78ca916, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:59:50,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:59:50,849 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:59:50,849 INFO L124 PetriNetUnfolderBase]: 12/38 cut-off events. [2023-11-06 22:59:50,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:50,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:50,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:50,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:59:50,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1521540142, now seen corresponding path program 1 times [2023-11-06 22:59:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:50,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000396023] [2023-11-06 22:59:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:50,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:50,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000396023] [2023-11-06 22:59:50,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000396023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:50,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:50,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:50,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981851828] [2023-11-06 22:59:50,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:50,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:50,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:50,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:50,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:50,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 708 [2023-11-06 22:59:50,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 171 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:50,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:50,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 708 [2023-11-06 22:59:50,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand