./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_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_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/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_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/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_af9a952f-9ed1-4c59-a651-ad1df51ced03/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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:10:51,436 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:10:51,507 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:10:51,511 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:10:51,512 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:10:51,543 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:10:51,543 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:10:51,544 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:10:51,545 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:10:51,545 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:10:51,546 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:10:51,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:10:51,547 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:10:51,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:10:51,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:10:51,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:10:51,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:10:51,550 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:10:51,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:10:51,551 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:10:51,551 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:10:51,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:10:51,555 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:10:51,555 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:10:51,556 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:10:51,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:10:51,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:10:51,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:10:51,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:51,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:10:51,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:10:51,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:10:51,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:10:51,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:10:51,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:10:51,564 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:10:51,564 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:10:51,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:10:51,565 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:10:51,565 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_af9a952f-9ed1-4c59-a651-ad1df51ced03/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2023-11-06 23:10:51,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:10:51,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:10:51,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:10:51,924 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:10:51,925 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:10:51,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-06 23:10:55,003 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:10:55,315 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:10:55,323 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-06 23:10:55,348 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/data/6101c291d/f4a3c9d3ecb54d5bb750193a5dd18a21/FLAG798bda929 [2023-11-06 23:10:55,374 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/data/6101c291d/f4a3c9d3ecb54d5bb750193a5dd18a21 [2023-11-06 23:10:55,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:10:55,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:10:55,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:55,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:10:55,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:10:55,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:55" (1/1) ... [2023-11-06 23:10:55,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433f0012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:55, skipping insertion in model container [2023-11-06 23:10:55,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:55" (1/1) ... [2023-11-06 23:10:55,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:10:56,113 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_af9a952f-9ed1-4c59-a651-ad1df51ced03/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-11-06 23:10:56,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:56,191 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:10:56,261 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_af9a952f-9ed1-4c59-a651-ad1df51ced03/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-11-06 23:10:56,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:56,373 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:10:56,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56 WrapperNode [2023-11-06 23:10:56,376 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:56,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:56,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:10:56,379 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:10:56,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,407 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,444 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 252 [2023-11-06 23:10:56,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:56,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:10:56,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:10:56,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:10:56,456 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,462 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,487 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,490 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,497 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,501 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:10:56,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:10:56,513 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:10:56,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:10:56,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (1/1) ... [2023-11-06 23:10:56,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:56,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:56,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:10:56,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:10:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:10:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:10:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:10:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:10:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:10:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:10:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 23:10:56,582 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 23:10:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:10:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:10:56,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:10:56,584 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 23:10:56,737 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:10:56,739 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:10:57,112 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:10:57,122 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:10:57,123 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-06 23:10:57,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:57 BoogieIcfgContainer [2023-11-06 23:10:57,125 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:10:57,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:10:57,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:10:57,131 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:10:57,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:10:55" (1/3) ... [2023-11-06 23:10:57,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a6e5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:57, skipping insertion in model container [2023-11-06 23:10:57,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:56" (2/3) ... [2023-11-06 23:10:57,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a6e5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:57, skipping insertion in model container [2023-11-06 23:10:57,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:57" (3/3) ... [2023-11-06 23:10:57,142 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-11-06 23:10:57,151 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:10:57,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:10:57,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-06 23:10:57,164 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:10:57,277 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 23:10:57,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 257 transitions, 521 flow [2023-11-06 23:10:57,514 INFO L124 PetriNetUnfolderBase]: 73/400 cut-off events. [2023-11-06 23:10:57,514 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:10:57,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 400 events. 73/400 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1832 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2023-11-06 23:10:57,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 257 transitions, 521 flow [2023-11-06 23:10:57,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 252 transitions, 508 flow [2023-11-06 23:10:57,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:10:57,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 252 transitions, 508 flow [2023-11-06 23:10:57,578 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 252 transitions, 508 flow [2023-11-06 23:10:57,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 252 transitions, 508 flow [2023-11-06 23:10:57,683 INFO L124 PetriNetUnfolderBase]: 72/395 cut-off events. [2023-11-06 23:10:57,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:10:57,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 395 events. 72/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1795 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2023-11-06 23:10:57,708 INFO L119 LiptonReduction]: Number of co-enabled transitions 21456 [2023-11-06 23:11:01,384 INFO L134 LiptonReduction]: Checked pairs total: 30710 [2023-11-06 23:11:01,384 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-06 23:11:01,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:11:01,413 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;@1f864da0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:11:01,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 23:11:01,420 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:11:01,420 INFO L124 PetriNetUnfolderBase]: 12/39 cut-off events. [2023-11-06 23:11:01,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:11:01,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:01,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:01,422 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 23:11:01,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1072479972, now seen corresponding path program 1 times [2023-11-06 23:11:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:01,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650110751] [2023-11-06 23:11:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:01,804 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 23:11:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:01,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650110751] [2023-11-06 23:11:01,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650110751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:01,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:01,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:11:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786527901] [2023-11-06 23:11:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:01,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:01,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:01,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 455 [2023-11-06 23:11:01,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 97 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 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 23:11:01,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:01,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 455 [2023-11-06 23:11:01,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:02,177 INFO L124 PetriNetUnfolderBase]: 631/1296 cut-off events. [2023-11-06 23:11:02,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:11:02,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2460 conditions, 1296 events. 631/1296 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7084 event pairs, 512 based on Foata normal form. 172/1245 useless extension candidates. Maximal degree in co-relation 2373. Up to 1159 conditions per place. [2023-11-06 23:11:02,188 INFO L140 encePairwiseOnDemand]: 420/455 looper letters, 53 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-06 23:11:02,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 246 flow [2023-11-06 23:11:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:11:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2023-11-06 23:11:02,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216117216117216 [2023-11-06 23:11:02,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2023-11-06 23:11:02,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2023-11-06 23:11:02,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:02,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2023-11-06 23:11:02,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 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 23:11:02,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 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 23:11:02,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 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 23:11:02,233 INFO L175 Difference]: Start difference. First operand has 63 places, 97 transitions, 198 flow. Second operand 3 states and 712 transitions. [2023-11-06 23:11:02,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 246 flow [2023-11-06 23:11:02,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:11:02,240 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 146 flow [2023-11-06 23:11:02,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-06 23:11:02,247 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-11-06 23:11:02,247 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 146 flow [2023-11-06 23:11:02,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 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 23:11:02,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:02,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:02,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:11:02,250 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 23:11:02,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1012587014, now seen corresponding path program 1 times [2023-11-06 23:11:02,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:02,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463068162] [2023-11-06 23:11:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:02,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,360 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 23:11:02,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:02,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463068162] [2023-11-06 23:11:02,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463068162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:02,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620341120] [2023-11-06 23:11:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:02,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:02,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:02,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:02,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:11:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:02,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:11:02,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:02,521 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 23:11:02,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:02,548 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 23:11:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620341120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:02,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 23:11:02,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948373174] [2023-11-06 23:11:02,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:02,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:11:02,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:02,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:11:02,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:11:02,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 455 [2023-11-06 23:11:02,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 0 states have call successors, (0), 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 23:11:02,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:02,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 455 [2023-11-06 23:11:02,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:02,972 INFO L124 PetriNetUnfolderBase]: 631/1299 cut-off events. [2023-11-06 23:11:02,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:11:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1299 events. 631/1299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7099 event pairs, 512 based on Foata normal form. 0/1076 useless extension candidates. Maximal degree in co-relation 2464. Up to 1159 conditions per place. [2023-11-06 23:11:02,982 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-06 23:11:02,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 274 flow [2023-11-06 23:11:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:11:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:11:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1303 transitions. [2023-11-06 23:11:02,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772893772893773 [2023-11-06 23:11:02,993 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1303 transitions. [2023-11-06 23:11:02,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1303 transitions. [2023-11-06 23:11:02,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:02,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1303 transitions. [2023-11-06 23:11:03,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 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 23:11:03,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 0 states have call successors, (0), 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 23:11:03,018 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 0 states have call successors, (0), 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 23:11:03,018 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 146 flow. Second operand 6 states and 1303 transitions. [2023-11-06 23:11:03,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 274 flow [2023-11-06 23:11:03,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 270 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:03,022 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 178 flow [2023-11-06 23:11:03,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-11-06 23:11:03,024 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-11-06 23:11:03,024 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 178 flow [2023-11-06 23:11:03,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 0 states have call successors, (0), 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 23:11:03,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:03,026 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-06 23:11:03,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:03,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:03,232 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 23:11:03,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1489452960, now seen corresponding path program 2 times [2023-11-06 23:11:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:03,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441669943] [2023-11-06 23:11:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:03,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:03,397 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 23:11:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441669943] [2023-11-06 23:11:03,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441669943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296795259] [2023-11-06 23:11:03,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:11:03,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:03,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:03,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:03,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:11:03,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:11:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:03,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:11:03,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:03,525 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 23:11:03,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:03,590 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 23:11:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296795259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:03,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:03,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-06 23:11:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917860955] [2023-11-06 23:11:03,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:03,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:11:03,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:11:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:11:03,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 455 [2023-11-06 23:11:03,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 178 flow. Second operand has 12 states, 12 states have (on average 208.25) internal successors, (2499), 12 states have internal predecessors, (2499), 0 states have call successors, (0), 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 23:11:03,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:03,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 455 [2023-11-06 23:11:03,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:04,032 INFO L124 PetriNetUnfolderBase]: 631/1305 cut-off events. [2023-11-06 23:11:04,032 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 23:11:04,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1305 events. 631/1305 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7102 event pairs, 512 based on Foata normal form. 6/1089 useless extension candidates. Maximal degree in co-relation 2455. Up to 1159 conditions per place. [2023-11-06 23:11:04,041 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-11-06 23:11:04,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 342 flow [2023-11-06 23:11:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:11:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:11:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2554 transitions. [2023-11-06 23:11:04,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46776556776556777 [2023-11-06 23:11:04,053 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2554 transitions. [2023-11-06 23:11:04,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2554 transitions. [2023-11-06 23:11:04,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:04,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2554 transitions. [2023-11-06 23:11:04,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.83333333333334) internal successors, (2554), 12 states have internal predecessors, (2554), 0 states have call successors, (0), 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 23:11:04,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 0 states have call successors, (0), 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 23:11:04,083 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 0 states have call successors, (0), 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 23:11:04,084 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 178 flow. Second operand 12 states and 2554 transitions. [2023-11-06 23:11:04,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 342 flow [2023-11-06 23:11:04,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 328 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:04,088 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 248 flow [2023-11-06 23:11:04,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2023-11-06 23:11:04,090 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-11-06 23:11:04,091 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 248 flow [2023-11-06 23:11:04,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 208.25) internal successors, (2499), 12 states have internal predecessors, (2499), 0 states have call successors, (0), 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 23:11:04,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:04,093 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 23:11:04,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:04,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:04,299 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 23:11:04,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1597783712, now seen corresponding path program 3 times [2023-11-06 23:11:04,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:04,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762534474] [2023-11-06 23:11:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:11:04,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:11:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:11:04,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:11:04,434 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:11:04,435 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 23:11:04,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 23:11:04,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 23:11:04,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 23:11:04,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 23:11:04,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:11:04,439 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-06 23:11:04,442 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 23:11:04,442 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 23:11:04,504 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:11:04,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 331 transitions, 678 flow [2023-11-06 23:11:04,645 INFO L124 PetriNetUnfolderBase]: 118/643 cut-off events. [2023-11-06 23:11:04,646 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:11:04,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 643 events. 118/643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3346 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 402. Up to 12 conditions per place. [2023-11-06 23:11:04,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 331 transitions, 678 flow [2023-11-06 23:11:04,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 331 transitions, 678 flow [2023-11-06 23:11:04,661 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:11:04,661 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 331 transitions, 678 flow [2023-11-06 23:11:04,661 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 331 transitions, 678 flow [2023-11-06 23:11:04,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 331 transitions, 678 flow [2023-11-06 23:11:04,758 INFO L124 PetriNetUnfolderBase]: 118/643 cut-off events. [2023-11-06 23:11:04,758 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:11:04,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 643 events. 118/643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3346 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 402. Up to 12 conditions per place. [2023-11-06 23:11:04,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 54864 [2023-11-06 23:11:09,162 INFO L134 LiptonReduction]: Checked pairs total: 82244 [2023-11-06 23:11:09,163 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-06 23:11:09,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:11:09,178 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;@1f864da0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:11:09,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 23:11:09,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:11:09,183 INFO L124 PetriNetUnfolderBase]: 10/41 cut-off events. [2023-11-06 23:11:09,183 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:11:09,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:09,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:09,184 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 23:11:09,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -135104241, now seen corresponding path program 1 times [2023-11-06 23:11:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:09,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488502981] [2023-11-06 23:11:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:09,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:09,237 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 23:11:09,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488502981] [2023-11-06 23:11:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488502981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:09,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:09,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:11:09,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247878120] [2023-11-06 23:11:09,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:09,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:09,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:09,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 590 [2023-11-06 23:11:09,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 133 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 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 23:11:09,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:09,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 590 [2023-11-06 23:11:09,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:13,020 INFO L124 PetriNetUnfolderBase]: 20523/31523 cut-off events. [2023-11-06 23:11:13,020 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-06 23:11:13,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60685 conditions, 31523 events. 20523/31523 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 217735 event pairs, 17692 based on Foata normal form. 5278/31061 useless extension candidates. Maximal degree in co-relation 20767. Up to 29073 conditions per place. [2023-11-06 23:11:13,239 INFO L140 encePairwiseOnDemand]: 546/590 looper letters, 74 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-06 23:11:13,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-11-06 23:11:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:11:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 919 transitions. [2023-11-06 23:11:13,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192090395480226 [2023-11-06 23:11:13,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 919 transitions. [2023-11-06 23:11:13,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 919 transitions. [2023-11-06 23:11:13,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:13,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 919 transitions. [2023-11-06 23:11:13,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 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 23:11:13,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:13,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:13,255 INFO L175 Difference]: Start difference. First operand has 87 places, 133 transitions, 282 flow. Second operand 3 states and 919 transitions. [2023-11-06 23:11:13,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-11-06 23:11:13,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:11:13,264 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 212 flow [2023-11-06 23:11:13,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, 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 23:11:13,266 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-11-06 23:11:13,267 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 212 flow [2023-11-06 23:11:13,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 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 23:11:13,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:13,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:11:13,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-06 23:11:13,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash -782341076, now seen corresponding path program 1 times [2023-11-06 23:11:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055162648] [2023-11-06 23:11:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:13,336 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 23:11:13,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:13,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055162648] [2023-11-06 23:11:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055162648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:13,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573087806] [2023-11-06 23:11:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:13,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:13,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:13,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:13,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:11:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:13,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:13,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:13,450 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 23:11:13,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573087806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:13,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:13,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 23:11:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5446001] [2023-11-06 23:11:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:13,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:13,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 590 [2023-11-06 23:11:13,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 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 23:11:13,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:13,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 590 [2023-11-06 23:11:13,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:16,169 INFO L124 PetriNetUnfolderBase]: 20188/31066 cut-off events. [2023-11-06 23:11:16,169 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-06 23:11:16,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60205 conditions, 31066 events. 20188/31066 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 217750 event pairs, 8512 based on Foata normal form. 0/25355 useless extension candidates. Maximal degree in co-relation 60192. Up to 29025 conditions per place. [2023-11-06 23:11:16,340 INFO L140 encePairwiseOnDemand]: 587/590 looper letters, 92 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-06 23:11:16,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-11-06 23:11:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:11:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2023-11-06 23:11:16,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056497175141242 [2023-11-06 23:11:16,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2023-11-06 23:11:16,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2023-11-06 23:11:16,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:16,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2023-11-06 23:11:16,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 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 23:11:16,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:16,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:16,356 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 212 flow. Second operand 3 states and 895 transitions. [2023-11-06 23:11:16,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-11-06 23:11:16,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:16,365 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 220 flow [2023-11-06 23:11:16,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, 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 23:11:16,369 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-11-06 23:11:16,369 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 220 flow [2023-11-06 23:11:16,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 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 23:11:16,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:16,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:16,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:16,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:11:16,579 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 23:11:16,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1270546198, now seen corresponding path program 1 times [2023-11-06 23:11:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:16,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615018634] [2023-11-06 23:11:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:16,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:16,632 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 23:11:16,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:16,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615018634] [2023-11-06 23:11:16,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615018634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132219318] [2023-11-06 23:11:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:16,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:16,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:11:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:16,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:11:16,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:16,757 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 23:11:16,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:16,782 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 23:11:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132219318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:16,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 23:11:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759710510] [2023-11-06 23:11:16,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:11:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:11:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:11:16,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 590 [2023-11-06 23:11:16,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 268.14285714285717) internal successors, (1877), 7 states have internal predecessors, (1877), 0 states have call successors, (0), 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 23:11:16,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:16,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 590 [2023-11-06 23:11:16,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:19,606 INFO L124 PetriNetUnfolderBase]: 20639/31398 cut-off events. [2023-11-06 23:11:19,606 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-11-06 23:11:19,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61135 conditions, 31398 events. 20639/31398 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 213862 event pairs, 17692 based on Foata normal form. 3/25875 useless extension candidates. Maximal degree in co-relation 61107. Up to 29043 conditions per place. [2023-11-06 23:11:19,950 INFO L140 encePairwiseOnDemand]: 587/590 looper letters, 75 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-11-06 23:11:19,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-11-06 23:11:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:11:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:11:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1678 transitions. [2023-11-06 23:11:19,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47401129943502823 [2023-11-06 23:11:19,959 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1678 transitions. [2023-11-06 23:11:19,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1678 transitions. [2023-11-06 23:11:19,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:19,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1678 transitions. [2023-11-06 23:11:19,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.6666666666667) internal successors, (1678), 6 states have internal predecessors, (1678), 0 states have call successors, (0), 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 23:11:19,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:19,977 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:19,977 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 220 flow. Second operand 6 states and 1678 transitions. [2023-11-06 23:11:19,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-11-06 23:11:19,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:19,982 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 254 flow [2023-11-06 23:11:19,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, 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 23:11:19,985 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-11-06 23:11:19,985 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 254 flow [2023-11-06 23:11:19,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 268.14285714285717) internal successors, (1877), 7 states have internal predecessors, (1877), 0 states have call successors, (0), 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 23:11:19,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:20,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:20,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:11:20,202 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 23:11:20,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1062321178, now seen corresponding path program 2 times [2023-11-06 23:11:20,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:20,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816066021] [2023-11-06 23:11:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:20,328 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 23:11:20,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:20,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816066021] [2023-11-06 23:11:20,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816066021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:20,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791108745] [2023-11-06 23:11:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:11:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:20,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:20,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:11:20,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:11:20,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:20,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:11:20,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:20,483 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 23:11:20,562 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:11:20,563 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 23:11:20,592 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 23:11:20,638 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 23:11:20,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:20,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791108745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:20,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:20,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-06 23:11:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662182407] [2023-11-06 23:11:20,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:20,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:11:20,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:11:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:11:20,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 590 [2023-11-06 23:11:20,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 255.66666666666666) internal successors, (1534), 6 states have internal predecessors, (1534), 0 states have call successors, (0), 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 23:11:20,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:20,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 590 [2023-11-06 23:11:20,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:24,487 INFO L124 PetriNetUnfolderBase]: 25160/39446 cut-off events. [2023-11-06 23:11:24,487 INFO L125 PetriNetUnfolderBase]: For 934/934 co-relation queries the response was YES. [2023-11-06 23:11:24,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76941 conditions, 39446 events. 25160/39446 cut-off events. For 934/934 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 292468 event pairs, 4271 based on Foata normal form. 0/32714 useless extension candidates. Maximal degree in co-relation 76905. Up to 28726 conditions per place. [2023-11-06 23:11:24,669 INFO L140 encePairwiseOnDemand]: 579/590 looper letters, 189 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2023-11-06 23:11:24,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 224 transitions, 953 flow [2023-11-06 23:11:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:11:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:11:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1728 transitions. [2023-11-06 23:11:24,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488135593220339 [2023-11-06 23:11:24,679 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1728 transitions. [2023-11-06 23:11:24,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1728 transitions. [2023-11-06 23:11:24,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:24,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1728 transitions. [2023-11-06 23:11:24,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 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 23:11:24,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:24,698 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:24,698 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 254 flow. Second operand 6 states and 1728 transitions. [2023-11-06 23:11:24,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 224 transitions, 953 flow [2023-11-06 23:11:24,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 224 transitions, 939 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:24,706 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 349 flow [2023-11-06 23:11:24,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, 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 23:11:24,707 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 19 predicate places. [2023-11-06 23:11:24,707 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 349 flow [2023-11-06 23:11:24,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.66666666666666) internal successors, (1534), 6 states have internal predecessors, (1534), 0 states have call successors, (0), 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 23:11:24,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:24,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:24,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:24,917 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 23:11:24,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1035874814, now seen corresponding path program 1 times [2023-11-06 23:11:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112326956] [2023-11-06 23:11:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:25,170 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 23:11:25,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112326956] [2023-11-06 23:11:25,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112326956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164540071] [2023-11-06 23:11:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:25,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:25,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:25,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:25,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:11:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:25,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:11:25,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:25,330 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 23:11:25,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:25,403 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 23:11:25,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164540071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:25,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:25,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-06 23:11:25,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56155087] [2023-11-06 23:11:25,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:25,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:11:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:11:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:11:25,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 590 [2023-11-06 23:11:25,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 349 flow. Second operand has 14 states, 14 states have (on average 263.92857142857144) internal successors, (3695), 14 states have internal predecessors, (3695), 0 states have call successors, (0), 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 23:11:25,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:25,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 590 [2023-11-06 23:11:25,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:29,335 INFO L124 PetriNetUnfolderBase]: 25222/39388 cut-off events. [2023-11-06 23:11:29,335 INFO L125 PetriNetUnfolderBase]: For 7584/7586 co-relation queries the response was YES. [2023-11-06 23:11:29,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84847 conditions, 39388 events. 25222/39388 cut-off events. For 7584/7586 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 294413 event pairs, 642 based on Foata normal form. 30/34792 useless extension candidates. Maximal degree in co-relation 84789. Up to 35697 conditions per place. [2023-11-06 23:11:29,512 INFO L140 encePairwiseOnDemand]: 585/590 looper letters, 147 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2023-11-06 23:11:29,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 875 flow [2023-11-06 23:11:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:11:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:11:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3812 transitions. [2023-11-06 23:11:29,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46150121065375305 [2023-11-06 23:11:29,549 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3812 transitions. [2023-11-06 23:11:29,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3812 transitions. [2023-11-06 23:11:29,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:29,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3812 transitions. [2023-11-06 23:11:29,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.2857142857143) internal successors, (3812), 14 states have internal predecessors, (3812), 0 states have call successors, (0), 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 23:11:29,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 590.0) internal successors, (8850), 15 states have internal predecessors, (8850), 0 states have call successors, (0), 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 23:11:29,582 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 590.0) internal successors, (8850), 15 states have internal predecessors, (8850), 0 states have call successors, (0), 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 23:11:29,582 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 349 flow. Second operand 14 states and 3812 transitions. [2023-11-06 23:11:29,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 875 flow [2023-11-06 23:11:29,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 875 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:11:29,608 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 419 flow [2023-11-06 23:11:29,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, 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 23:11:29,609 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 33 predicate places. [2023-11-06 23:11:29,609 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 419 flow [2023-11-06 23:11:29,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 263.92857142857144) internal successors, (3695), 14 states have internal predecessors, (3695), 0 states have call successors, (0), 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 23:11:29,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:29,611 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 23:11:29,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:29,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af9a952f-9ed1-4c59-a651-ad1df51ced03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:29,817 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 23:11:29,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:29,818 INFO L85 PathProgramCache]: Analyzing trace with hash -38917699, now seen corresponding path program 1 times [2023-11-06 23:11:29,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:29,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422217929] [2023-11-06 23:11:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:29,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:11:29,846 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:11:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:11:29,880 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:11:29,883 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:11:29,883 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 23:11:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 23:11:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 23:11:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 23:11:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 23:11:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 23:11:29,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:11:29,884 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-11-06 23:11:29,885 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 23:11:29,885 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 23:11:29,939 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:11:29,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 405 transitions, 837 flow [2023-11-06 23:11:30,123 INFO L124 PetriNetUnfolderBase]: 168/921 cut-off events. [2023-11-06 23:11:30,123 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 23:11:30,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 921 events. 168/921 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5102 event pairs, 1 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 651. Up to 16 conditions per place. [2023-11-06 23:11:30,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 405 transitions, 837 flow [2023-11-06 23:11:30,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 405 transitions, 837 flow [2023-11-06 23:11:30,149 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:11:30,149 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 405 transitions, 837 flow [2023-11-06 23:11:30,150 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 405 transitions, 837 flow [2023-11-06 23:11:30,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 405 transitions, 837 flow [2023-11-06 23:11:30,326 INFO L124 PetriNetUnfolderBase]: 168/921 cut-off events. [2023-11-06 23:11:30,327 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 23:11:30,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 921 events. 168/921 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5102 event pairs, 1 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 651. Up to 16 conditions per place. [2023-11-06 23:11:30,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 98496 [2023-11-06 23:11:35,112 INFO L134 LiptonReduction]: Checked pairs total: 149931 [2023-11-06 23:11:35,113 INFO L136 LiptonReduction]: Total number of compositions: 311 [2023-11-06 23:11:35,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:11:35,115 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;@1f864da0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:11:35,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 23:11:35,119 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:11:35,119 INFO L124 PetriNetUnfolderBase]: 13/43 cut-off events. [2023-11-06 23:11:35,120 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:11:35,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:35,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:35,120 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 23:11:35,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash 850984715, now seen corresponding path program 1 times [2023-11-06 23:11:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287057977] [2023-11-06 23:11:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:35,150 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 23:11:35,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:35,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287057977] [2023-11-06 23:11:35,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287057977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:35,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:35,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:11:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853713822] [2023-11-06 23:11:35,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:35,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 716 [2023-11-06 23:11:35,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 172 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 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 23:11:35,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:35,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 716 [2023-11-06 23:11:35,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand