./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/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_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/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_9d37e06a-59f5-404f-95f3-372679ea2d37/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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:37:44,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:37:44,312 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:37:44,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:37:44,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:37:44,347 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:37:44,347 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:37:44,348 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:37:44,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:37:44,350 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:37:44,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:37:44,351 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:37:44,352 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:37:44,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:37:44,353 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:37:44,354 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:37:44,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:37:44,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:37:44,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:37:44,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:37:44,357 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:37:44,358 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:37:44,358 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:37:44,359 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:37:44,359 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:37:44,360 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:37:44,360 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:37:44,361 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:37:44,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:44,362 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:37:44,362 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:37:44,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:37:44,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:37:44,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:37:44,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:37:44,364 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:37:44,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:37:44,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:37:44,366 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:37:44,366 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_9d37e06a-59f5-404f-95f3-372679ea2d37/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2023-11-06 22:37:44,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:37:44,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:37:44,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:37:44,723 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:37:44,724 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:37:44,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-11-06 22:37:47,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:37:48,277 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:37:48,278 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-11-06 22:37:48,306 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/data/2f6a3e610/ba403725141448bd9fbdcfa2674e644a/FLAG1d50f0931 [2023-11-06 22:37:48,325 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/data/2f6a3e610/ba403725141448bd9fbdcfa2674e644a [2023-11-06 22:37:48,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:37:48,338 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:37:48,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:48,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:37:48,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:37:48,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:48" (1/1) ... [2023-11-06 22:37:48,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@734fe306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:48, skipping insertion in model container [2023-11-06 22:37:48,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:48" (1/1) ... [2023-11-06 22:37:48,424 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:37:48,955 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_9d37e06a-59f5-404f-95f3-372679ea2d37/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-11-06 22:37:49,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:49,033 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:37:49,082 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_9d37e06a-59f5-404f-95f3-372679ea2d37/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-11-06 22:37:49,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:49,165 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:37:49,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49 WrapperNode [2023-11-06 22:37:49,166 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:49,167 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:49,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:37:49,168 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:37:49,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,262 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 195 [2023-11-06 22:37:49,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:49,264 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:37:49,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:37:49,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:37:49,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,303 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:37:49,304 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:37:49,304 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:37:49,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:37:49,306 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (1/1) ... [2023-11-06 22:37:49,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:49,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:49,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:37:49,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:37:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:37:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:37:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:37:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:37:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:37:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:37:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:37:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:37:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:37:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:37:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:37:49,412 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:37:49,633 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:37:49,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:37:49,989 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:37:50,000 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:37:50,000 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-06 22:37:50,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:50 BoogieIcfgContainer [2023-11-06 22:37:50,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:37:50,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:37:50,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:37:50,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:37:50,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:48" (1/3) ... [2023-11-06 22:37:50,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52dc7aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:50, skipping insertion in model container [2023-11-06 22:37:50,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:49" (2/3) ... [2023-11-06 22:37:50,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52dc7aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:50, skipping insertion in model container [2023-11-06 22:37:50,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:50" (3/3) ... [2023-11-06 22:37:50,014 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-11-06 22:37:50,024 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:37:50,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:37:50,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 22:37:50,037 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:37:50,163 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:37:50,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 203 transitions, 413 flow [2023-11-06 22:37:50,401 INFO L124 PetriNetUnfolderBase]: 45/278 cut-off events. [2023-11-06 22:37:50,401 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:37:50,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 278 events. 45/278 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 871 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-11-06 22:37:50,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 203 transitions, 413 flow [2023-11-06 22:37:50,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 198 transitions, 400 flow [2023-11-06 22:37:50,423 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:37:50,435 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 198 transitions, 400 flow [2023-11-06 22:37:50,438 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 198 transitions, 400 flow [2023-11-06 22:37:50,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 198 transitions, 400 flow [2023-11-06 22:37:50,499 INFO L124 PetriNetUnfolderBase]: 44/273 cut-off events. [2023-11-06 22:37:50,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:37:50,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 273 events. 44/273 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 831 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-11-06 22:37:50,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 12150 [2023-11-06 22:37:54,434 INFO L134 LiptonReduction]: Checked pairs total: 19093 [2023-11-06 22:37:54,435 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-11-06 22:37:54,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:37:54,459 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;@52f5513f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:37:54,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:37:54,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:37:54,466 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-11-06 22:37:54,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:37:54,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:54,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:37:54,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:37:54,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1983120933, now seen corresponding path program 1 times [2023-11-06 22:37:54,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:54,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152757609] [2023-11-06 22:37:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:54,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:54,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152757609] [2023-11-06 22:37:54,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152757609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:54,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:54,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:37:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454740315] [2023-11-06 22:37:54,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:54,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:37:54,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:54,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:37:54,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:37:54,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 377 [2023-11-06 22:37:54,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 69 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:54,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:54,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 377 [2023-11-06 22:37:54,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:55,166 INFO L124 PetriNetUnfolderBase]: 307/691 cut-off events. [2023-11-06 22:37:55,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:37:55,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 691 events. 307/691 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3470 event pairs, 270 based on Foata normal form. 140/714 useless extension candidates. Maximal degree in co-relation 1245. Up to 605 conditions per place. [2023-11-06 22:37:55,174 INFO L140 encePairwiseOnDemand]: 351/377 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-11-06 22:37:55,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 174 flow [2023-11-06 22:37:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:37:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:37:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-11-06 22:37:55,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951370468611848 [2023-11-06 22:37:55,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-11-06 22:37:55,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-11-06 22:37:55,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:55,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-11-06 22:37:55,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,234 INFO L175 Difference]: Start difference. First operand has 47 places, 69 transitions, 142 flow. Second operand 3 states and 560 transitions. [2023-11-06 22:37:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 174 flow [2023-11-06 22:37:55,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:37:55,241 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 108 flow [2023-11-06 22:37:55,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-06 22:37:55,247 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-11-06 22:37:55,247 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 108 flow [2023-11-06 22:37:55,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:55,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:55,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:37:55,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:37:55,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:55,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1967315565, now seen corresponding path program 1 times [2023-11-06 22:37:55,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:55,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59708871] [2023-11-06 22:37:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59708871] [2023-11-06 22:37:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59708871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554653446] [2023-11-06 22:37:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:55,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:55,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:37:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:55,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:37:55,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:55,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:55,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554653446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:55,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:55,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:37:55,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775522815] [2023-11-06 22:37:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:55,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:37:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:37:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:55,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 377 [2023-11-06 22:37:55,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:55,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 377 [2023-11-06 22:37:55,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:55,718 INFO L124 PetriNetUnfolderBase]: 305/686 cut-off events. [2023-11-06 22:37:55,718 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:37:55,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 686 events. 305/686 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3499 event pairs, 119 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 1270. Up to 567 conditions per place. [2023-11-06 22:37:55,722 INFO L140 encePairwiseOnDemand]: 374/377 looper letters, 52 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-06 22:37:55,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 248 flow [2023-11-06 22:37:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:37:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:37:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-11-06 22:37:55,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880636604774536 [2023-11-06 22:37:55,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-11-06 22:37:55,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-11-06 22:37:55,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:55,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-11-06 22:37:55,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,736 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 108 flow. Second operand 3 states and 552 transitions. [2023-11-06 22:37:55,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 248 flow [2023-11-06 22:37:55,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 244 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:37:55,739 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 112 flow [2023-11-06 22:37:55,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-06 22:37:55,741 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-06 22:37:55,741 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 112 flow [2023-11-06 22:37:55,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:55,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:55,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:55,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:55,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:37:55,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -867089304, now seen corresponding path program 1 times [2023-11-06 22:37:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804518397] [2023-11-06 22:37:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:56,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:56,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804518397] [2023-11-06 22:37:56,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804518397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:56,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965775111] [2023-11-06 22:37:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:56,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:56,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:56,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:37:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:56,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:37:56,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:56,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:56,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965775111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:56,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:56,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:37:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934840418] [2023-11-06 22:37:56,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:37:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:37:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:37:56,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 377 [2023-11-06 22:37:56,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:56,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 377 [2023-11-06 22:37:56,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:56,469 INFO L124 PetriNetUnfolderBase]: 305/676 cut-off events. [2023-11-06 22:37:56,470 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-06 22:37:56,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 676 events. 305/676 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3302 event pairs, 270 based on Foata normal form. 3/583 useless extension candidates. Maximal degree in co-relation 1300. Up to 585 conditions per place. [2023-11-06 22:37:56,474 INFO L140 encePairwiseOnDemand]: 374/377 looper letters, 36 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-06 22:37:56,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 206 flow [2023-11-06 22:37:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:37:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:37:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1034 transitions. [2023-11-06 22:37:56,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45711759504862953 [2023-11-06 22:37:56,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1034 transitions. [2023-11-06 22:37:56,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1034 transitions. [2023-11-06 22:37:56,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:56,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1034 transitions. [2023-11-06 22:37:56,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.33333333333334) internal successors, (1034), 6 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,493 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,493 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 112 flow. Second operand 6 states and 1034 transitions. [2023-11-06 22:37:56,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 206 flow [2023-11-06 22:37:56,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:37:56,497 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 144 flow [2023-11-06 22:37:56,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-11-06 22:37:56,498 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2023-11-06 22:37:56,498 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 144 flow [2023-11-06 22:37:56,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:56,500 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-06 22:37:56,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:56,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:56,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:37:56,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2138671904, now seen corresponding path program 2 times [2023-11-06 22:37:56,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202676607] [2023-11-06 22:37:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:56,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:56,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202676607] [2023-11-06 22:37:56,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202676607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750449725] [2023-11-06 22:37:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:56,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:37:56,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:37:56,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:56,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:37:56,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:57,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:57,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750449725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:57,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:57,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:37:57,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025279956] [2023-11-06 22:37:57,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:37:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:37:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:37:57,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 377 [2023-11-06 22:37:57,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 166.30769230769232) internal successors, (2162), 13 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:57,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 377 [2023-11-06 22:37:57,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:57,331 INFO L124 PetriNetUnfolderBase]: 304/683 cut-off events. [2023-11-06 22:37:57,331 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-06 22:37:57,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 683 events. 304/683 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3326 event pairs, 270 based on Foata normal form. 6/596 useless extension candidates. Maximal degree in co-relation 1289. Up to 583 conditions per place. [2023-11-06 22:37:57,339 INFO L140 encePairwiseOnDemand]: 374/377 looper letters, 36 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-11-06 22:37:57,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 56 transitions, 274 flow [2023-11-06 22:37:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:37:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:37:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2033 transitions. [2023-11-06 22:37:57,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493810786914235 [2023-11-06 22:37:57,349 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2033 transitions. [2023-11-06 22:37:57,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2033 transitions. [2023-11-06 22:37:57,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:57,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2033 transitions. [2023-11-06 22:37:57,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.41666666666666) internal successors, (2033), 12 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,400 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 377.0) internal successors, (4901), 13 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,401 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 144 flow. Second operand 12 states and 2033 transitions. [2023-11-06 22:37:57,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 56 transitions, 274 flow [2023-11-06 22:37:57,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 56 transitions, 260 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:37:57,405 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 214 flow [2023-11-06 22:37:57,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-11-06 22:37:57,406 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 26 predicate places. [2023-11-06 22:37:57,406 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 214 flow [2023-11-06 22:37:57,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 166.30769230769232) internal successors, (2162), 13 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:57,408 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 22:37:57,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:57,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:57,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:37:57,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:57,614 INFO L85 PathProgramCache]: Analyzing trace with hash -364018144, now seen corresponding path program 3 times [2023-11-06 22:37:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576666239] [2023-11-06 22:37:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:57,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:37:57,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:37:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:37:57,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:37:57,709 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:37:57,712 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:37:57,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:37:57,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:37:57,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:37:57,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:37:57,716 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-11-06 22:37:57,724 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:37:57,730 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:37:57,782 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:37:57,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 280 transitions, 576 flow [2023-11-06 22:37:57,866 INFO L124 PetriNetUnfolderBase]: 75/456 cut-off events. [2023-11-06 22:37:57,866 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:37:57,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 456 events. 75/456 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1824 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 280. Up to 12 conditions per place. [2023-11-06 22:37:57,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 280 transitions, 576 flow [2023-11-06 22:37:57,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 280 transitions, 576 flow [2023-11-06 22:37:57,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:37:57,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 240 places, 280 transitions, 576 flow [2023-11-06 22:37:57,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 240 places, 280 transitions, 576 flow [2023-11-06 22:37:57,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 280 transitions, 576 flow [2023-11-06 22:37:57,952 INFO L124 PetriNetUnfolderBase]: 75/456 cut-off events. [2023-11-06 22:37:57,952 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:37:57,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 456 events. 75/456 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1824 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 280. Up to 12 conditions per place. [2023-11-06 22:37:57,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 37200 [2023-11-06 22:38:02,778 INFO L134 LiptonReduction]: Checked pairs total: 61692 [2023-11-06 22:38:02,779 INFO L136 LiptonReduction]: Total number of compositions: 236 [2023-11-06 22:38:02,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:38:02,782 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;@52f5513f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:38:02,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:38:02,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:38:02,787 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-06 22:38:02,787 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:38:02,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:02,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:38:02,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:38:02,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1453260848, now seen corresponding path program 1 times [2023-11-06 22:38:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:02,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728786209] [2023-11-06 22:38:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:02,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728786209] [2023-11-06 22:38:02,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728786209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:02,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:02,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:02,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210302863] [2023-11-06 22:38:02,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:02,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:02,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:02,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 516 [2023-11-06 22:38:02,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 102 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:02,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 516 [2023-11-06 22:38:02,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:05,168 INFO L124 PetriNetUnfolderBase]: 11255/17641 cut-off events. [2023-11-06 22:38:05,168 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-06 22:38:05,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34258 conditions, 17641 events. 11255/17641 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 116583 event pairs, 10345 based on Foata normal form. 2584/17513 useless extension candidates. Maximal degree in co-relation 14974. Up to 16525 conditions per place. [2023-11-06 22:38:05,287 INFO L140 encePairwiseOnDemand]: 482/516 looper letters, 57 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-11-06 22:38:05,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 276 flow [2023-11-06 22:38:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:05,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-11-06 22:38:05,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006459948320413 [2023-11-06 22:38:05,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-11-06 22:38:05,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-11-06 22:38:05,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:05,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-11-06 22:38:05,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:05,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:05,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:05,299 INFO L175 Difference]: Start difference. First operand has 70 places, 102 transitions, 220 flow. Second operand 3 states and 775 transitions. [2023-11-06 22:38:05,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 276 flow [2023-11-06 22:38:05,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:38:05,307 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 168 flow [2023-11-06 22:38:05,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2023-11-06 22:38:05,312 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-11-06 22:38:05,312 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 168 flow [2023-11-06 22:38:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:05,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:05,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:05,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:38:05,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:38:05,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1209172407, now seen corresponding path program 1 times [2023-11-06 22:38:05,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:05,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270287085] [2023-11-06 22:38:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:05,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:05,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:05,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270287085] [2023-11-06 22:38:05,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270287085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:05,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101420579] [2023-11-06 22:38:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:05,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:05,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:05,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:05,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:38:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:05,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:38:05,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:05,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:05,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101420579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:05,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:38:05,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:38:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736359291] [2023-11-06 22:38:05,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:38:05,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 516 [2023-11-06 22:38:05,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:05,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:05,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 516 [2023-11-06 22:38:05,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:07,443 INFO L124 PetriNetUnfolderBase]: 10994/17562 cut-off events. [2023-11-06 22:38:07,444 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-06 22:38:07,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34047 conditions, 17562 events. 10994/17562 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 119489 event pairs, 4905 based on Foata normal form. 0/14898 useless extension candidates. Maximal degree in co-relation 34034. Up to 16368 conditions per place. [2023-11-06 22:38:07,543 INFO L140 encePairwiseOnDemand]: 513/516 looper letters, 75 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-11-06 22:38:07,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 358 flow [2023-11-06 22:38:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-11-06 22:38:07,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49160206718346255 [2023-11-06 22:38:07,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-11-06 22:38:07,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-11-06 22:38:07,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:07,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-11-06 22:38:07,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,554 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 168 flow. Second operand 3 states and 761 transitions. [2023-11-06 22:38:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 358 flow [2023-11-06 22:38:07,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:07,558 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 176 flow [2023-11-06 22:38:07,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2023-11-06 22:38:07,559 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-11-06 22:38:07,559 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 176 flow [2023-11-06 22:38:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:07,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:07,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:07,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:07,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:38:07,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:07,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1953358867, now seen corresponding path program 1 times [2023-11-06 22:38:07,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:07,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571161265] [2023-11-06 22:38:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:07,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571161265] [2023-11-06 22:38:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571161265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265690112] [2023-11-06 22:38:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:07,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:07,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:07,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:38:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:08,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:38:08,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:08,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:08,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265690112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:08,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:08,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:38:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477547281] [2023-11-06 22:38:08,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:08,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:38:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:38:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:38:08,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 516 [2023-11-06 22:38:08,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:08,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:08,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 516 [2023-11-06 22:38:08,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:09,851 INFO L124 PetriNetUnfolderBase]: 11214/17603 cut-off events. [2023-11-06 22:38:09,851 INFO L125 PetriNetUnfolderBase]: For 679/679 co-relation queries the response was YES. [2023-11-06 22:38:09,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34721 conditions, 17603 events. 11214/17603 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 116314 event pairs, 10345 based on Foata normal form. 3/15226 useless extension candidates. Maximal degree in co-relation 34693. Up to 16418 conditions per place. [2023-11-06 22:38:09,948 INFO L140 encePairwiseOnDemand]: 513/516 looper letters, 58 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-11-06 22:38:09,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 314 flow [2023-11-06 22:38:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:38:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:38:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1427 transitions. [2023-11-06 22:38:09,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609173126614987 [2023-11-06 22:38:09,957 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1427 transitions. [2023-11-06 22:38:09,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1427 transitions. [2023-11-06 22:38:09,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:09,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1427 transitions. [2023-11-06 22:38:09,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.83333333333334) internal successors, (1427), 6 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,974 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,975 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 176 flow. Second operand 6 states and 1427 transitions. [2023-11-06 22:38:09,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 314 flow [2023-11-06 22:38:09,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:09,980 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 210 flow [2023-11-06 22:38:09,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-11-06 22:38:09,981 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 11 predicate places. [2023-11-06 22:38:09,982 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 210 flow [2023-11-06 22:38:09,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:09,983 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:09,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:10,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:38:10,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:38:10,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1597018540, now seen corresponding path program 2 times [2023-11-06 22:38:10,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:10,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094341371] [2023-11-06 22:38:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:10,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:10,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:10,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094341371] [2023-11-06 22:38:10,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094341371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:10,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687485203] [2023-11-06 22:38:10,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:38:10,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:10,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:10,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:10,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:38:10,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:38:10,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:10,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:38:10,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:10,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-06 22:38:10,770 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:38:10,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:38:10,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-06 22:38:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:38:10,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687485203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:10,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:38:10,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-06 22:38:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182146553] [2023-11-06 22:38:10,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:38:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:38:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:38:11,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 516 [2023-11-06 22:38:11,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 222.8) internal successors, (1114), 5 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:11,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:11,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 516 [2023-11-06 22:38:11,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:12,867 INFO L124 PetriNetUnfolderBase]: 11380/18179 cut-off events. [2023-11-06 22:38:12,867 INFO L125 PetriNetUnfolderBase]: For 708/708 co-relation queries the response was YES. [2023-11-06 22:38:12,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36138 conditions, 18179 events. 11380/18179 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 124930 event pairs, 4197 based on Foata normal form. 0/16027 useless extension candidates. Maximal degree in co-relation 36102. Up to 13715 conditions per place. [2023-11-06 22:38:12,943 INFO L140 encePairwiseOnDemand]: 507/516 looper letters, 102 selfloop transitions, 8 changer transitions 9/131 dead transitions. [2023-11-06 22:38:12,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 577 flow [2023-11-06 22:38:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:38:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:38:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1002 transitions. [2023-11-06 22:38:12,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2023-11-06 22:38:12,948 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1002 transitions. [2023-11-06 22:38:12,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1002 transitions. [2023-11-06 22:38:12,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:12,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1002 transitions. [2023-11-06 22:38:12,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.5) internal successors, (1002), 4 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:12,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 516.0) internal successors, (2580), 5 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:12,958 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 516.0) internal successors, (2580), 5 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:12,959 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 210 flow. Second operand 4 states and 1002 transitions. [2023-11-06 22:38:12,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 577 flow [2023-11-06 22:38:12,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 131 transitions, 563 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:12,964 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 252 flow [2023-11-06 22:38:12,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2023-11-06 22:38:12,965 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2023-11-06 22:38:12,965 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 252 flow [2023-11-06 22:38:12,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.8) internal successors, (1114), 5 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:12,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:12,967 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:38:12,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:38:13,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:13,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:38:13,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1267313963, now seen corresponding path program 1 times [2023-11-06 22:38:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691574053] [2023-11-06 22:38:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:38:13,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:13,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691574053] [2023-11-06 22:38:13,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691574053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:13,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067940900] [2023-11-06 22:38:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:13,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:13,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:13,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:13,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:38:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:13,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:38:13,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:38:13,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:38:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067940900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:13,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:13,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:38:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788002497] [2023-11-06 22:38:13,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:13,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:38:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:38:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:38:13,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 516 [2023-11-06 22:38:13,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 252 flow. Second operand has 13 states, 13 states have (on average 228.3846153846154) internal successors, (2969), 13 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:13,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:13,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 516 [2023-11-06 22:38:13,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:15,554 INFO L124 PetriNetUnfolderBase]: 11376/18211 cut-off events. [2023-11-06 22:38:15,554 INFO L125 PetriNetUnfolderBase]: For 3298/3307 co-relation queries the response was YES. [2023-11-06 22:38:15,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39200 conditions, 18211 events. 11376/18211 cut-off events. For 3298/3307 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 125398 event pairs, 10363 based on Foata normal form. 6/17108 useless extension candidates. Maximal degree in co-relation 39143. Up to 17228 conditions per place. [2023-11-06 22:38:15,644 INFO L140 encePairwiseOnDemand]: 513/516 looper letters, 64 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2023-11-06 22:38:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 87 transitions, 438 flow [2023-11-06 22:38:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:38:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:38:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2798 transitions. [2023-11-06 22:38:15,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518733850129199 [2023-11-06 22:38:15,655 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2798 transitions. [2023-11-06 22:38:15,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2798 transitions. [2023-11-06 22:38:15,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:15,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2798 transitions. [2023-11-06 22:38:15,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 233.16666666666666) internal successors, (2798), 12 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:15,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 516.0) internal successors, (6708), 13 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:15,680 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 516.0) internal successors, (6708), 13 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:15,680 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 252 flow. Second operand 12 states and 2798 transitions. [2023-11-06 22:38:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 87 transitions, 438 flow [2023-11-06 22:38:15,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 87 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:38:15,691 INFO L231 Difference]: Finished difference. Result has 102 places, 87 transitions, 336 flow [2023-11-06 22:38:15,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=336, PETRI_PLACES=102, PETRI_TRANSITIONS=87} [2023-11-06 22:38:15,692 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 32 predicate places. [2023-11-06 22:38:15,693 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 87 transitions, 336 flow [2023-11-06 22:38:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 228.3846153846154) internal successors, (2969), 13 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:15,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:15,695 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:38:15,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d37e06a-59f5-404f-95f3-372679ea2d37/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:15,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:38:15,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:15,905 INFO L85 PathProgramCache]: Analyzing trace with hash 907549045, now seen corresponding path program 2 times [2023-11-06 22:38:15,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:15,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141470086] [2023-11-06 22:38:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:15,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:38:15,938 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:38:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:38:15,963 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:38:15,963 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:38:15,963 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:38:15,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:38:15,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:38:15,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:38:15,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:38:15,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:38:15,965 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-11-06 22:38:15,966 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:38:15,966 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:38:16,008 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:38:16,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 357 transitions, 741 flow [2023-11-06 22:38:16,147 INFO L124 PetriNetUnfolderBase]: 110/669 cut-off events. [2023-11-06 22:38:16,148 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-06 22:38:16,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 669 events. 110/669 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2997 event pairs, 1 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 464. Up to 16 conditions per place. [2023-11-06 22:38:16,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 357 transitions, 741 flow [2023-11-06 22:38:16,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 357 transitions, 741 flow [2023-11-06 22:38:16,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:38:16,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 357 transitions, 741 flow [2023-11-06 22:38:16,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 357 transitions, 741 flow [2023-11-06 22:38:16,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 357 transitions, 741 flow [2023-11-06 22:38:16,520 INFO L124 PetriNetUnfolderBase]: 110/669 cut-off events. [2023-11-06 22:38:16,520 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-06 22:38:16,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 669 events. 110/669 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2997 event pairs, 1 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 464. Up to 16 conditions per place. [2023-11-06 22:38:16,563 INFO L119 LiptonReduction]: Number of co-enabled transitions 73350 [2023-11-06 22:38:21,640 INFO L134 LiptonReduction]: Checked pairs total: 107830 [2023-11-06 22:38:21,641 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-11-06 22:38:21,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:38:21,643 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;@52f5513f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:38:21,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:38:21,647 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:38:21,647 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-11-06 22:38:21,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:38:21,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:21,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:38:21,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:38:21,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1535945608, now seen corresponding path program 1 times [2023-11-06 22:38:21,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:21,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196674582] [2023-11-06 22:38:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:21,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:21,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196674582] [2023-11-06 22:38:21,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196674582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:21,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:21,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602742223] [2023-11-06 22:38:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:21,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:21,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:21,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 650 [2023-11-06 22:38:21,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 135 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:21,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:21,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 650 [2023-11-06 22:38:21,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand