./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.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_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/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_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/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_4946366e-cf71-428c-b38f-e033ca5ec518/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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:46:31,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:46:31,644 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:46:31,652 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:46:31,653 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:46:31,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:46:31,696 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:46:31,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:46:31,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:46:31,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:46:31,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:46:31,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:46:31,706 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:46:31,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:46:31,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:46:31,709 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:46:31,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:46:31,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:46:31,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:46:31,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:46:31,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:46:31,711 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:46:31,712 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:46:31,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:46:31,713 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:46:31,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:46:31,714 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:46:31,714 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:46:31,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:31,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:46:31,717 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:46:31,717 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:46:31,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:46:31,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:46:31,718 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:46:31,718 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:46:31,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:46:31,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:46:31,719 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:46:31,719 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_4946366e-cf71-428c-b38f-e033ca5ec518/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2023-11-06 22:46:31,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:46:31,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:46:31,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:46:32,000 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:46:32,001 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:46:32,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-11-06 22:46:35,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:46:35,515 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:46:35,516 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-11-06 22:46:35,541 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/data/046678d9b/efaaafb9db8842dc973b179f136a9b5d/FLAGc55bfb7b5 [2023-11-06 22:46:35,557 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/data/046678d9b/efaaafb9db8842dc973b179f136a9b5d [2023-11-06 22:46:35,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:46:35,566 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:46:35,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:35,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:46:35,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:46:35,579 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:35" (1/1) ... [2023-11-06 22:46:35,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d51c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:35, skipping insertion in model container [2023-11-06 22:46:35,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:35" (1/1) ... [2023-11-06 22:46:35,658 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:46:36,129 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_4946366e-cf71-428c-b38f-e033ca5ec518/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-11-06 22:46:36,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:36,192 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:46:36,233 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_4946366e-cf71-428c-b38f-e033ca5ec518/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-11-06 22:46:36,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:36,350 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:46:36,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36 WrapperNode [2023-11-06 22:46:36,350 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:36,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:36,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:46:36,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:46:36,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,447 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 192 [2023-11-06 22:46:36,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:36,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:46:36,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:46:36,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:46:36,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,475 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,488 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,509 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,516 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:46:36,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:46:36,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:46:36,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:46:36,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (1/1) ... [2023-11-06 22:46:36,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:36,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:36,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:46:36,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:46:36,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:46:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:46:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:46:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:46:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:46:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:46:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:46:36,617 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:46:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:46:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:46:36,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:46:36,619 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 22:46:36,791 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:46:36,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:46:37,170 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:46:37,179 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:46:37,180 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-06 22:46:37,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:37 BoogieIcfgContainer [2023-11-06 22:46:37,182 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:46:37,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:46:37,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:46:37,199 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:46:37,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:35" (1/3) ... [2023-11-06 22:46:37,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4339e0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:37, skipping insertion in model container [2023-11-06 22:46:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:36" (2/3) ... [2023-11-06 22:46:37,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4339e0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:37, skipping insertion in model container [2023-11-06 22:46:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:37" (3/3) ... [2023-11-06 22:46:37,203 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-11-06 22:46:37,211 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:46:37,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:46:37,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 22:46:37,223 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:46:37,358 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:46:37,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 407 flow [2023-11-06 22:46:37,542 INFO L124 PetriNetUnfolderBase]: 45/275 cut-off events. [2023-11-06 22:46:37,546 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:46:37,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 275 events. 45/275 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 893 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-11-06 22:46:37,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 407 flow [2023-11-06 22:46:37,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 394 flow [2023-11-06 22:46:37,577 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:37,622 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 195 transitions, 394 flow [2023-11-06 22:46:37,625 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 195 transitions, 394 flow [2023-11-06 22:46:37,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 195 transitions, 394 flow [2023-11-06 22:46:37,721 INFO L124 PetriNetUnfolderBase]: 44/270 cut-off events. [2023-11-06 22:46:37,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:37,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 270 events. 44/270 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 856 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-11-06 22:46:37,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 11664 [2023-11-06 22:46:41,407 INFO L134 LiptonReduction]: Checked pairs total: 18293 [2023-11-06 22:46:41,407 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-11-06 22:46:41,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:41,429 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;@72a61eef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:41,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:46:41,435 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:41,436 INFO L124 PetriNetUnfolderBase]: 8/29 cut-off events. [2023-11-06 22:46:41,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:41,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:41,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:41,437 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 22:46:41,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:41,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2070542085, now seen corresponding path program 1 times [2023-11-06 22:46:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:41,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154122623] [2023-11-06 22:46:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:41,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:41,695 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 22:46:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:41,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154122623] [2023-11-06 22:46:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154122623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:46:41,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173371168] [2023-11-06 22:46:41,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:41,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:41,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:41,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:41,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 371 [2023-11-06 22:46:41,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 22:46:41,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:41,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 371 [2023-11-06 22:46:41,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:41,946 INFO L124 PetriNetUnfolderBase]: 301/651 cut-off events. [2023-11-06 22:46:41,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:41,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 651 events. 301/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3186 event pairs, 266 based on Foata normal form. 107/643 useless extension candidates. Maximal degree in co-relation 1189. Up to 588 conditions per place. [2023-11-06 22:46:41,951 INFO L140 encePairwiseOnDemand]: 347/371 looper letters, 36 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-06 22:46:41,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 172 flow [2023-11-06 22:46:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-06 22:46:41,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2023-11-06 22:46:41,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-06 22:46:41,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-06 22:46:41,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:41,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-06 22:46:41,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 22:46:42,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 22:46:42,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 22:46:42,006 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 136 flow. Second operand 3 states and 549 transitions. [2023-11-06 22:46:42,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 172 flow [2023-11-06 22:46:42,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:42,014 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 106 flow [2023-11-06 22:46:42,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-06 22:46:42,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-06 22:46:42,021 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 106 flow [2023-11-06 22:46:42,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 22:46:42,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:42,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:46:42,023 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 22:46:42,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash -833231303, now seen corresponding path program 1 times [2023-11-06 22:46:42,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:42,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169282871] [2023-11-06 22:46:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:42,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:42,158 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 22:46:42,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169282871] [2023-11-06 22:46:42,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169282871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:42,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716106531] [2023-11-06 22:46:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:42,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:42,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:42,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:42,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:46:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:42,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:46:42,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:42,303 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 22:46:42,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:42,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716106531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:42,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:46:42,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:46:42,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81477792] [2023-11-06 22:46:42,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:42,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:42,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:42,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:46:42,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 371 [2023-11-06 22:46:42,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 22:46:42,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:42,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 371 [2023-11-06 22:46:42,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:42,500 INFO L124 PetriNetUnfolderBase]: 283/635 cut-off events. [2023-11-06 22:46:42,500 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 635 events. 283/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3540 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1206. Up to 555 conditions per place. [2023-11-06 22:46:42,505 INFO L140 encePairwiseOnDemand]: 368/371 looper letters, 51 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-06 22:46:42,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 242 flow [2023-11-06 22:46:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-11-06 22:46:42,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48697214734950584 [2023-11-06 22:46:42,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-11-06 22:46:42,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-11-06 22:46:42,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:42,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-11-06 22:46:42,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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 22:46:42,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 22:46:42,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 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 22:46:42,529 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 106 flow. Second operand 3 states and 542 transitions. [2023-11-06 22:46:42,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 242 flow [2023-11-06 22:46:42,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 238 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:42,532 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 110 flow [2023-11-06 22:46:42,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-06 22:46:42,533 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-11-06 22:46:42,534 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 110 flow [2023-11-06 22:46:42,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 22:46:42,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:42,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:42,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:42,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:46:42,741 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 22:46:42,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -82574732, now seen corresponding path program 1 times [2023-11-06 22:46:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:42,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135366658] [2023-11-06 22:46:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:42,890 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 22:46:42,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:42,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135366658] [2023-11-06 22:46:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135366658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:42,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116349143] [2023-11-06 22:46:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:42,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:42,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:42,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:42,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:46:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:42,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:46:42,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:43,009 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 22:46:43,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:43,027 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 22:46:43,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116349143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:43,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:43,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:46:43,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220339727] [2023-11-06 22:46:43,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:43,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:46:43,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:46:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:46:43,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2023-11-06 22:46:43,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 163.57142857142858) internal successors, (1145), 7 states have internal predecessors, (1145), 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 22:46:43,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:43,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2023-11-06 22:46:43,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:43,275 INFO L124 PetriNetUnfolderBase]: 301/637 cut-off events. [2023-11-06 22:46:43,275 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-06 22:46:43,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 637 events. 301/637 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3072 event pairs, 266 based on Foata normal form. 3/547 useless extension candidates. Maximal degree in co-relation 1244. Up to 571 conditions per place. [2023-11-06 22:46:43,280 INFO L140 encePairwiseOnDemand]: 368/371 looper letters, 36 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-06 22:46:43,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 204 flow [2023-11-06 22:46:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:46:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:46:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1016 transitions. [2023-11-06 22:46:43,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564240790655885 [2023-11-06 22:46:43,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1016 transitions. [2023-11-06 22:46:43,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1016 transitions. [2023-11-06 22:46:43,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:43,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1016 transitions. [2023-11-06 22:46:43,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 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 22:46:43,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 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 22:46:43,298 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 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 22:46:43,298 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 110 flow. Second operand 6 states and 1016 transitions. [2023-11-06 22:46:43,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 204 flow [2023-11-06 22:46:43,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:46:43,303 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 142 flow [2023-11-06 22:46:43,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-11-06 22:46:43,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-11-06 22:46:43,305 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 142 flow [2023-11-06 22:46:43,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.57142857142858) internal successors, (1145), 7 states have internal predecessors, (1145), 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 22:46:43,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:43,307 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-06 22:46:43,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:43,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:43,513 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 22:46:43,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:43,514 INFO L85 PathProgramCache]: Analyzing trace with hash 15433256, now seen corresponding path program 2 times [2023-11-06 22:46:43,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:43,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072593909] [2023-11-06 22:46:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:43,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:43,638 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 22:46:43,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:43,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072593909] [2023-11-06 22:46:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072593909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:43,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944548735] [2023-11-06 22:46:43,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:43,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:43,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:43,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:43,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:46:43,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:46:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:43,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:46:43,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:43,783 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 22:46:43,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:43,850 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 22:46:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944548735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:43,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:46:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241101928] [2023-11-06 22:46:43,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:43,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:46:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:46:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:46:43,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 371 [2023-11-06 22:46:43,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 142 flow. Second operand has 13 states, 13 states have (on average 163.30769230769232) internal successors, (2123), 13 states have internal predecessors, (2123), 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 22:46:43,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:43,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 371 [2023-11-06 22:46:43,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:44,108 INFO L124 PetriNetUnfolderBase]: 301/643 cut-off events. [2023-11-06 22:46:44,112 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-06 22:46:44,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 643 events. 301/643 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3084 event pairs, 266 based on Foata normal form. 6/556 useless extension candidates. Maximal degree in co-relation 1235. Up to 571 conditions per place. [2023-11-06 22:46:44,116 INFO L140 encePairwiseOnDemand]: 368/371 looper letters, 36 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-11-06 22:46:44,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 272 flow [2023-11-06 22:46:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:46:44,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:46:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1997 transitions. [2023-11-06 22:46:44,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44856244384546273 [2023-11-06 22:46:44,125 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1997 transitions. [2023-11-06 22:46:44,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1997 transitions. [2023-11-06 22:46:44,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:44,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1997 transitions. [2023-11-06 22:46:44,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.41666666666666) internal successors, (1997), 12 states have internal predecessors, (1997), 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 22:46:44,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 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 22:46:44,148 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 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 22:46:44,148 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 142 flow. Second operand 12 states and 1997 transitions. [2023-11-06 22:46:44,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 272 flow [2023-11-06 22:46:44,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 258 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:44,156 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 212 flow [2023-11-06 22:46:44,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=212, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-11-06 22:46:44,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2023-11-06 22:46:44,159 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 212 flow [2023-11-06 22:46:44,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 163.30769230769232) internal successors, (2123), 13 states have internal predecessors, (2123), 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 22:46:44,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:44,163 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 22:46:44,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:44,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:44,369 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 22:46:44,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1461658968, now seen corresponding path program 3 times [2023-11-06 22:46:44,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:44,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776933092] [2023-11-06 22:46:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:44,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:46:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:44,462 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:46:44,462 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:46:44,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:46:44,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:46:44,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:46:44,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:46:44,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:46:44,466 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-11-06 22:46:44,469 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:46:44,469 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:46:44,507 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:46:44,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 274 transitions, 564 flow [2023-11-06 22:46:44,621 INFO L124 PetriNetUnfolderBase]: 75/450 cut-off events. [2023-11-06 22:46:44,621 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:46:44,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 450 events. 75/450 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1830 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2023-11-06 22:46:44,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 274 transitions, 564 flow [2023-11-06 22:46:44,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 274 transitions, 564 flow [2023-11-06 22:46:44,634 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:44,634 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 274 transitions, 564 flow [2023-11-06 22:46:44,635 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 274 transitions, 564 flow [2023-11-06 22:46:44,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 274 transitions, 564 flow [2023-11-06 22:46:44,717 INFO L124 PetriNetUnfolderBase]: 75/450 cut-off events. [2023-11-06 22:46:44,717 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:46:44,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 450 events. 75/450 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1830 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2023-11-06 22:46:44,753 INFO L119 LiptonReduction]: Number of co-enabled transitions 35280 [2023-11-06 22:46:48,983 INFO L134 LiptonReduction]: Checked pairs total: 57679 [2023-11-06 22:46:48,983 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-11-06 22:46:48,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:48,986 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;@72a61eef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:48,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:46:48,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:48,989 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2023-11-06 22:46:48,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:48,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:48,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:48,990 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 22:46:48,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2130735075, now seen corresponding path program 1 times [2023-11-06 22:46:48,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:48,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077837341] [2023-11-06 22:46:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:48,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:49,037 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 22:46:49,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077837341] [2023-11-06 22:46:49,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077837341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:49,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:49,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:46:49,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911571400] [2023-11-06 22:46:49,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:49,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:49,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:49,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 507 [2023-11-06 22:46:49,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 22:46:49,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:49,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 507 [2023-11-06 22:46:49,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:51,085 INFO L124 PetriNetUnfolderBase]: 9849/15756 cut-off events. [2023-11-06 22:46:51,086 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-06 22:46:51,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 15756 events. 9849/15756 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 104646 event pairs, 9112 based on Foata normal form. 2729/16053 useless extension candidates. Maximal degree in co-relation 12153. Up to 14349 conditions per place. [2023-11-06 22:46:51,202 INFO L140 encePairwiseOnDemand]: 472/507 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-06 22:46:51,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 270 flow [2023-11-06 22:46:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 756 transitions. [2023-11-06 22:46:51,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970414201183432 [2023-11-06 22:46:51,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 756 transitions. [2023-11-06 22:46:51,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 756 transitions. [2023-11-06 22:46:51,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:51,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 756 transitions. [2023-11-06 22:46:51,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 22:46:51,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 22:46:51,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 22:46:51,215 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 218 flow. Second operand 3 states and 756 transitions. [2023-11-06 22:46:51,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 270 flow [2023-11-06 22:46:51,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:51,219 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 166 flow [2023-11-06 22:46:51,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-11-06 22:46:51,223 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-11-06 22:46:51,224 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 166 flow [2023-11-06 22:46:51,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 22:46:51,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:51,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:51,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:46:51,225 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 22:46:51,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash 959240680, now seen corresponding path program 1 times [2023-11-06 22:46:51,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:51,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785458677] [2023-11-06 22:46:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:51,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:51,296 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 22:46:51,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:51,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785458677] [2023-11-06 22:46:51,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785458677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:51,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511003665] [2023-11-06 22:46:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:51,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:51,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:51,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:51,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:46:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:51,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:46:51,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:51,398 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 22:46:51,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:51,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511003665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:51,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:46:51,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:46:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182185859] [2023-11-06 22:46:51,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:51,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:51,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:51,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:46:51,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 507 [2023-11-06 22:46:51,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 22:46:51,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:51,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 507 [2023-11-06 22:46:51,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:53,138 INFO L124 PetriNetUnfolderBase]: 9675/15650 cut-off events. [2023-11-06 22:46:53,138 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-06 22:46:53,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30078 conditions, 15650 events. 9675/15650 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 106695 event pairs, 4312 based on Foata normal form. 0/13238 useless extension candidates. Maximal degree in co-relation 30065. Up to 14317 conditions per place. [2023-11-06 22:46:53,248 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 72 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-11-06 22:46:53,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 348 flow [2023-11-06 22:46:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2023-11-06 22:46:53,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48652202498356345 [2023-11-06 22:46:53,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2023-11-06 22:46:53,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2023-11-06 22:46:53,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:53,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2023-11-06 22:46:53,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 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 22:46:53,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 22:46:53,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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 22:46:53,265 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 166 flow. Second operand 3 states and 740 transitions. [2023-11-06 22:46:53,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 348 flow [2023-11-06 22:46:53,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 344 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:53,269 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 174 flow [2023-11-06 22:46:53,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=174, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-11-06 22:46:53,271 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-11-06 22:46:53,271 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 174 flow [2023-11-06 22:46:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 22:46:53,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:53,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:53,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:53,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:53,479 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 22:46:53,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1731787309, now seen corresponding path program 1 times [2023-11-06 22:46:53,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:53,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838487607] [2023-11-06 22:46:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:53,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:53,552 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 22:46:53,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:53,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838487607] [2023-11-06 22:46:53,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838487607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:53,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935044110] [2023-11-06 22:46:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:53,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:53,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:53,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:46:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:53,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:46:53,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:53,673 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 22:46:53,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:53,688 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 22:46:53,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935044110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:53,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:53,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:46:53,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667073885] [2023-11-06 22:46:53,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:53,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:46:53,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:46:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:46:53,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-11-06 22:46:53,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 22:46:53,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:53,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-11-06 22:46:53,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:55,451 INFO L124 PetriNetUnfolderBase]: 9912/15619 cut-off events. [2023-11-06 22:46:55,452 INFO L125 PetriNetUnfolderBase]: For 612/612 co-relation queries the response was YES. [2023-11-06 22:46:55,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30581 conditions, 15619 events. 9912/15619 cut-off events. For 612/612 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 101695 event pairs, 9112 based on Foata normal form. 3/13422 useless extension candidates. Maximal degree in co-relation 30553. Up to 14334 conditions per place. [2023-11-06 22:46:55,525 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-06 22:46:55,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 308 flow [2023-11-06 22:46:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:46:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:46:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1389 transitions. [2023-11-06 22:46:55,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45660749506903353 [2023-11-06 22:46:55,531 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1389 transitions. [2023-11-06 22:46:55,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1389 transitions. [2023-11-06 22:46:55,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:55,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1389 transitions. [2023-11-06 22:46:55,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.5) internal successors, (1389), 6 states have internal predecessors, (1389), 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 22:46:55,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 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 22:46:55,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 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 22:46:55,544 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 174 flow. Second operand 6 states and 1389 transitions. [2023-11-06 22:46:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 308 flow [2023-11-06 22:46:55,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:55,548 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 208 flow [2023-11-06 22:46:55,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-11-06 22:46:55,549 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-11-06 22:46:55,549 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 208 flow [2023-11-06 22:46:55,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 22:46:55,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:55,551 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:55,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:55,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:55,756 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 22:46:55,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash -478509400, now seen corresponding path program 2 times [2023-11-06 22:46:55,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:55,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300658621] [2023-11-06 22:46:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:55,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:55,840 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 22:46:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300658621] [2023-11-06 22:46:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300658621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485023332] [2023-11-06 22:46:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:55,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:55,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:46:55,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:46:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:55,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:46:55,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:55,984 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-06 22:46:56,040 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:46:56,041 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 22:46:56,067 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 22:46:56,095 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 22:46:56,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:56,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485023332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:56,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:46:56,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-06 22:46:56,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893766647] [2023-11-06 22:46:56,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:56,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:46:56,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:46:56,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:46:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 507 [2023-11-06 22:46:56,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 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 22:46:56,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:56,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 507 [2023-11-06 22:46:56,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:58,121 INFO L124 PetriNetUnfolderBase]: 9983/16176 cut-off events. [2023-11-06 22:46:58,121 INFO L125 PetriNetUnfolderBase]: For 639/639 co-relation queries the response was YES. [2023-11-06 22:46:58,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31874 conditions, 16176 events. 9983/16176 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 111009 event pairs, 3664 based on Foata normal form. 0/14214 useless extension candidates. Maximal degree in co-relation 31838. Up to 11885 conditions per place. [2023-11-06 22:46:58,197 INFO L140 encePairwiseOnDemand]: 498/507 looper letters, 98 selfloop transitions, 8 changer transitions 9/128 dead transitions. [2023-11-06 22:46:58,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 563 flow [2023-11-06 22:46:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:46:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:46:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 974 transitions. [2023-11-06 22:46:58,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480276134122288 [2023-11-06 22:46:58,202 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 974 transitions. [2023-11-06 22:46:58,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 974 transitions. [2023-11-06 22:46:58,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:58,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 974 transitions. [2023-11-06 22:46:58,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 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 22:46:58,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 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 22:46:58,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 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 22:46:58,212 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 208 flow. Second operand 4 states and 974 transitions. [2023-11-06 22:46:58,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 563 flow [2023-11-06 22:46:58,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 549 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:58,218 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 250 flow [2023-11-06 22:46:58,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-11-06 22:46:58,219 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2023-11-06 22:46:58,219 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 250 flow [2023-11-06 22:46:58,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.8) internal successors, (1084), 5 states have internal predecessors, (1084), 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 22:46:58,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:58,221 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:46:58,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:58,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:46:58,426 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 22:46:58,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:58,426 INFO L85 PathProgramCache]: Analyzing trace with hash 859011496, now seen corresponding path program 1 times [2023-11-06 22:46:58,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:58,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344528837] [2023-11-06 22:46:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:58,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:58,579 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 22:46:58,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:58,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344528837] [2023-11-06 22:46:58,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344528837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:58,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820708714] [2023-11-06 22:46:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:58,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:58,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:58,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:46:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:58,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:46:58,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:58,737 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 22:46:58,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:58,797 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 22:46:58,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820708714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:58,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:58,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:46:58,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477275439] [2023-11-06 22:46:58,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:58,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:46:58,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:58,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:46:58,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:46:58,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-11-06 22:46:58,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 250 flow. Second operand has 13 states, 13 states have (on average 222.3846153846154) internal successors, (2891), 13 states have internal predecessors, (2891), 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 22:46:58,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:58,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-11-06 22:46:58,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:00,471 INFO L124 PetriNetUnfolderBase]: 9981/16205 cut-off events. [2023-11-06 22:47:00,471 INFO L125 PetriNetUnfolderBase]: For 3039/3044 co-relation queries the response was YES. [2023-11-06 22:47:00,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34683 conditions, 16205 events. 9981/16205 cut-off events. For 3039/3044 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 111420 event pairs, 8984 based on Foata normal form. 6/15179 useless extension candidates. Maximal degree in co-relation 34626. Up to 15056 conditions per place. [2023-11-06 22:47:00,552 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 62 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-11-06 22:47:00,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 432 flow [2023-11-06 22:47:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:47:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:47:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2724 transitions. [2023-11-06 22:47:00,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477317554240631 [2023-11-06 22:47:00,564 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2724 transitions. [2023-11-06 22:47:00,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2724 transitions. [2023-11-06 22:47:00,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:00,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2724 transitions. [2023-11-06 22:47:00,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.0) internal successors, (2724), 12 states have internal predecessors, (2724), 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 22:47:00,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 507.0) internal successors, (6591), 13 states have internal predecessors, (6591), 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 22:47:00,591 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 507.0) internal successors, (6591), 13 states have internal predecessors, (6591), 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 22:47:00,592 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 250 flow. Second operand 12 states and 2724 transitions. [2023-11-06 22:47:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 432 flow [2023-11-06 22:47:00,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 86 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:47:00,601 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 334 flow [2023-11-06 22:47:00,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=334, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2023-11-06 22:47:00,602 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2023-11-06 22:47:00,602 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 334 flow [2023-11-06 22:47:00,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 222.3846153846154) internal successors, (2891), 13 states have internal predecessors, (2891), 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 22:47:00,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:00,604 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:47:00,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:00,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4946366e-cf71-428c-b38f-e033ca5ec518/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:47:00,811 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 22:47:00,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash 607218568, now seen corresponding path program 2 times [2023-11-06 22:47:00,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:00,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218934130] [2023-11-06 22:47:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:00,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:47:00,843 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:47:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:47:00,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:47:00,877 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:47:00,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:47:00,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:47:00,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:47:00,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:47:00,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:47:00,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:47:00,879 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-11-06 22:47:00,881 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:47:00,881 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:47:00,937 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:47:00,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 348 transitions, 723 flow [2023-11-06 22:47:01,077 INFO L124 PetriNetUnfolderBase]: 110/660 cut-off events. [2023-11-06 22:47:01,077 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-06 22:47:01,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 660 events. 110/660 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2951 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 458. Up to 16 conditions per place. [2023-11-06 22:47:01,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 348 transitions, 723 flow [2023-11-06 22:47:01,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 296 places, 348 transitions, 723 flow [2023-11-06 22:47:01,097 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:47:01,097 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 296 places, 348 transitions, 723 flow [2023-11-06 22:47:01,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 296 places, 348 transitions, 723 flow [2023-11-06 22:47:01,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 348 transitions, 723 flow [2023-11-06 22:47:01,219 INFO L124 PetriNetUnfolderBase]: 110/660 cut-off events. [2023-11-06 22:47:01,219 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-06 22:47:01,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 660 events. 110/660 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2951 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 458. Up to 16 conditions per place. [2023-11-06 22:47:01,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 69120 [2023-11-06 22:47:06,479 INFO L134 LiptonReduction]: Checked pairs total: 119475 [2023-11-06 22:47:06,480 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-11-06 22:47:06,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:47:06,483 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;@72a61eef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:47:06,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:47:06,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:47:06,487 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2023-11-06 22:47:06,488 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:47:06,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:06,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:47:06,488 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 22:47:06,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:06,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1722029927, now seen corresponding path program 1 times [2023-11-06 22:47:06,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:06,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363965965] [2023-11-06 22:47:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:06,518 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 22:47:06,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:06,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363965965] [2023-11-06 22:47:06,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363965965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:06,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:06,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:47:06,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207778009] [2023-11-06 22:47:06,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:06,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 638 [2023-11-06 22:47:06,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 129 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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 22:47:06,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:06,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 638 [2023-11-06 22:47:06,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand