./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --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_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/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_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/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_e3603ffe-d4da-41c5-ad40-44f2af590059/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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:38,530 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:38,654 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:38,667 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:38,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:38,705 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:38,706 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:38,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:38,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:38,715 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:38,716 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:38,716 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:38,717 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:38,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:38,719 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:38,720 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:38,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:38,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:38,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:38,722 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:38,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:38,723 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:38,724 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:38,724 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:38,725 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:38,726 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:38,726 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:38,727 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:38,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:38,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:38,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:38,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:38,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:38,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:38,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:38,730 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:38,731 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:38,731 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:38,731 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:38,731 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_e3603ffe-d4da-41c5-ad40-44f2af590059/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 [2023-11-06 21:53:39,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:39,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:39,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:39,125 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:39,125 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:39,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2023-11-06 21:53:42,158 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:42,376 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:42,377 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2023-11-06 21:53:42,386 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/data/9dc270897/361652eb01124232a09cfdbbd0bbf2b7/FLAG268ae8529 [2023-11-06 21:53:42,401 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/data/9dc270897/361652eb01124232a09cfdbbd0bbf2b7 [2023-11-06 21:53:42,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:42,406 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:42,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:42,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:42,413 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:42,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7419c5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42, skipping insertion in model container [2023-11-06 21:53:42,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,443 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:42,662 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_e3603ffe-d4da-41c5-ad40-44f2af590059/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-11-06 21:53:42,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:42,685 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:42,711 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_e3603ffe-d4da-41c5-ad40-44f2af590059/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-11-06 21:53:42,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:42,724 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:53:42,725 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:53:42,733 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:42,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42 WrapperNode [2023-11-06 21:53:42,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:42,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:42,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:42,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:42,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,794 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 279 [2023-11-06 21:53:42,795 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:42,796 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:42,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:42,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:42,806 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:42,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:42,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:42,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:42,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (1/1) ... [2023-11-06 21:53:42,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:42,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:42,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:53:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:53:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:53:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:53:42,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:53:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:53:42,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:53:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:53:42,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:53:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:53:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:53:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:53:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:53:42,927 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 21:53:43,047 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:43,049 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:43,575 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:44,005 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:44,006 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 21:53:44,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:44 BoogieIcfgContainer [2023-11-06 21:53:44,009 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:44,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:44,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:44,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:44,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:42" (1/3) ... [2023-11-06 21:53:44,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbe3d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:44, skipping insertion in model container [2023-11-06 21:53:44,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:42" (2/3) ... [2023-11-06 21:53:44,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbe3d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:44, skipping insertion in model container [2023-11-06 21:53:44,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:44" (3/3) ... [2023-11-06 21:53:44,026 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2023-11-06 21:53:44,035 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:53:44,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:44,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:44,050 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:53:44,139 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:53:44,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 198 transitions, 417 flow [2023-11-06 21:53:44,293 INFO L124 PetriNetUnfolderBase]: 16/195 cut-off events. [2023-11-06 21:53:44,293 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:44,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 16/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 120 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-11-06 21:53:44,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 198 transitions, 417 flow [2023-11-06 21:53:44,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 184 transitions, 386 flow [2023-11-06 21:53:44,320 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:53:44,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 184 transitions, 386 flow [2023-11-06 21:53:44,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 184 transitions, 386 flow [2023-11-06 21:53:44,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 184 transitions, 386 flow [2023-11-06 21:53:44,452 INFO L124 PetriNetUnfolderBase]: 16/184 cut-off events. [2023-11-06 21:53:44,452 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:44,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 184 events. 16/184 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-11-06 21:53:44,456 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-11-06 21:53:52,766 INFO L134 LiptonReduction]: Checked pairs total: 1636 [2023-11-06 21:53:52,767 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-11-06 21:53:52,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:52,790 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;@529a0607, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:52,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 21:53:52,798 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:53:52,798 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-11-06 21:53:52,799 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:52,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:52,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:52,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:52,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash 255493520, now seen corresponding path program 1 times [2023-11-06 21:53:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:52,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793135117] [2023-11-06 21:53:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,307 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 21:53:53,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:53,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793135117] [2023-11-06 21:53:53,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793135117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:53,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:53,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:53:53,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680915013] [2023-11-06 21:53:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:53,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:53,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 389 [2023-11-06 21:53:53,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 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 21:53:53,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:53,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 389 [2023-11-06 21:53:53,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:53,543 INFO L124 PetriNetUnfolderBase]: 361/510 cut-off events. [2023-11-06 21:53:53,543 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 21:53:53,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 510 events. 361/510 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1622 event pairs, 39 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-11-06 21:53:53,550 INFO L140 encePairwiseOnDemand]: 384/389 looper letters, 34 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2023-11-06 21:53:53,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 195 flow [2023-11-06 21:53:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:53:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-11-06 21:53:53,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48414738646101113 [2023-11-06 21:53:53,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-11-06 21:53:53,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-11-06 21:53:53,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:53,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-11-06 21:53:53,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 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 21:53:53,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 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 21:53:53,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 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 21:53:53,595 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 3 states and 565 transitions. [2023-11-06 21:53:53,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 195 flow [2023-11-06 21:53:53,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 173 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 21:53:53,602 INFO L231 Difference]: Finished difference. Result has 28 places, 29 transitions, 84 flow [2023-11-06 21:53:53,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=29} [2023-11-06 21:53:53,608 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-06 21:53:53,608 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 29 transitions, 84 flow [2023-11-06 21:53:53,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 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 21:53:53,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:53,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:53,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:53:53,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:53,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1197598935, now seen corresponding path program 1 times [2023-11-06 21:53:53,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:53,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063839906] [2023-11-06 21:53:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,839 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 21:53:53,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063839906] [2023-11-06 21:53:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063839906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:53,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:53,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2343737] [2023-11-06 21:53:53,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:53,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 389 [2023-11-06 21:53:53,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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 21:53:53,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:53,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 389 [2023-11-06 21:53:53,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:54,240 INFO L124 PetriNetUnfolderBase]: 326/479 cut-off events. [2023-11-06 21:53:54,241 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2023-11-06 21:53:54,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 479 events. 326/479 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1597 event pairs, 140 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 425. Up to 459 conditions per place. [2023-11-06 21:53:54,246 INFO L140 encePairwiseOnDemand]: 384/389 looper letters, 24 selfloop transitions, 4 changer transitions 3/34 dead transitions. [2023-11-06 21:53:54,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 156 flow [2023-11-06 21:53:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:53:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 846 transitions. [2023-11-06 21:53:54,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43496143958868894 [2023-11-06 21:53:54,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 846 transitions. [2023-11-06 21:53:54,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 846 transitions. [2023-11-06 21:53:54,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:54,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 846 transitions. [2023-11-06 21:53:54,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 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 21:53:54,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 389.0) internal successors, (2334), 6 states have internal predecessors, (2334), 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 21:53:54,265 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 389.0) internal successors, (2334), 6 states have internal predecessors, (2334), 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 21:53:54,265 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 84 flow. Second operand 5 states and 846 transitions. [2023-11-06 21:53:54,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 156 flow [2023-11-06 21:53:54,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:53:54,268 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 108 flow [2023-11-06 21:53:54,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-06 21:53:54,269 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-06 21:53:54,269 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 108 flow [2023-11-06 21:53:54,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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 21:53:54,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:54,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:54,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:53:54,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:54,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1873724072, now seen corresponding path program 1 times [2023-11-06 21:53:54,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:54,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680433563] [2023-11-06 21:53:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:53:54,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:54,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680433563] [2023-11-06 21:53:54,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680433563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:54,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:54,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:54,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033026393] [2023-11-06 21:53:54,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:54,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:54,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:54,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 389 [2023-11-06 21:53:54,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 173.5) internal successors, (694), 4 states have internal predecessors, (694), 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 21:53:54,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:54,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 389 [2023-11-06 21:53:54,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:54,644 INFO L124 PetriNetUnfolderBase]: 395/565 cut-off events. [2023-11-06 21:53:54,644 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-06 21:53:54,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1380 conditions, 565 events. 395/565 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1944 event pairs, 124 based on Foata normal form. 38/603 useless extension candidates. Maximal degree in co-relation 1355. Up to 422 conditions per place. [2023-11-06 21:53:54,651 INFO L140 encePairwiseOnDemand]: 385/389 looper letters, 37 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-06 21:53:54,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 226 flow [2023-11-06 21:53:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:53:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-11-06 21:53:54,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45437017994858614 [2023-11-06 21:53:54,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-11-06 21:53:54,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-11-06 21:53:54,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:54,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-11-06 21:53:54,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 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 21:53:54,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 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 21:53:54,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 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 21:53:54,666 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 108 flow. Second operand 4 states and 707 transitions. [2023-11-06 21:53:54,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 226 flow [2023-11-06 21:53:54,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 43 transitions, 214 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 21:53:54,672 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 115 flow [2023-11-06 21:53:54,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2023-11-06 21:53:54,674 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-06 21:53:54,678 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 115 flow [2023-11-06 21:53:54,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.5) internal successors, (694), 4 states have internal predecessors, (694), 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 21:53:54,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:54,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:54,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:53:54,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:54,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:54,681 INFO L85 PathProgramCache]: Analyzing trace with hash 293837292, now seen corresponding path program 1 times [2023-11-06 21:53:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:54,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562531634] [2023-11-06 21:53:54,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:54,884 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 21:53:54,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:54,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562531634] [2023-11-06 21:53:54,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562531634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:54,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044636078] [2023-11-06 21:53:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:54,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:54,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:55,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:55,102 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 21:53:55,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:53:55,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044636078] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:55,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:53:55,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-06 21:53:55,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637287224] [2023-11-06 21:53:55,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:55,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:55,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:53:55,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 389 [2023-11-06 21:53:55,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 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 21:53:55,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:55,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 389 [2023-11-06 21:53:55,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:55,420 INFO L124 PetriNetUnfolderBase]: 325/477 cut-off events. [2023-11-06 21:53:55,420 INFO L125 PetriNetUnfolderBase]: For 253/283 co-relation queries the response was YES. [2023-11-06 21:53:55,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 477 events. 325/477 cut-off events. For 253/283 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1623 event pairs, 119 based on Foata normal form. 60/526 useless extension candidates. Maximal degree in co-relation 1291. Up to 364 conditions per place. [2023-11-06 21:53:55,425 INFO L140 encePairwiseOnDemand]: 384/389 looper letters, 38 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-11-06 21:53:55,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 251 flow [2023-11-06 21:53:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:53:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-11-06 21:53:55,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41439588688946016 [2023-11-06 21:53:55,430 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-11-06 21:53:55,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-11-06 21:53:55,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:55,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-11-06 21:53:55,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 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 21:53:55,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 389.0) internal successors, (2334), 6 states have internal predecessors, (2334), 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 21:53:55,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 389.0) internal successors, (2334), 6 states have internal predecessors, (2334), 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 21:53:55,442 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 115 flow. Second operand 5 states and 806 transitions. [2023-11-06 21:53:55,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 251 flow [2023-11-06 21:53:55,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 236 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 21:53:55,446 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 127 flow [2023-11-06 21:53:55,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-11-06 21:53:55,447 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-06 21:53:55,447 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 127 flow [2023-11-06 21:53:55,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 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 21:53:55,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:55,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:55,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-06 21:53:55,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:55,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -212786203, now seen corresponding path program 1 times [2023-11-06 21:53:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:55,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731937558] [2023-11-06 21:53:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731937558] [2023-11-06 21:53:57,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731937558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:57,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978598366] [2023-11-06 21:53:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:57,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:57,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:57,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 21:53:57,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,909 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 21:53:57,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-06 21:53:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,952 INFO L322 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-06 21:53:57,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 21:53:57,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,984 INFO L322 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-06 21:53:57,984 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2023-11-06 21:53:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:58,007 INFO L322 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-06 21:53:58,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 21:53:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:58,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:58,271 INFO L322 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-11-06 21:53:58,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-11-06 21:53:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:59,074 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:53:59,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-06 21:53:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:53:59,371 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:53:59,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-06 21:53:59,501 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:53:59,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 19 [2023-11-06 21:53:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:59,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:59,630 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_138 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_138)) (.cse1 (* 4 c_~M~0))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)))) c_~res1~0)) is different from false [2023-11-06 21:53:59,664 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_138 (Array Int Int)) (v_ArrVal_137 (Array Int Int))) (= (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_138)) (.cse1 (* 4 c_~M~0))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)))) c_~res1~0)) is different from false [2023-11-06 21:53:59,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:53:59,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3062 treesize of output 1858 [2023-11-06 21:53:59,827 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:53:59,828 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 438 treesize of output 350 [2023-11-06 21:53:59,862 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:53:59,863 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 342 treesize of output 302 [2023-11-06 21:54:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-06 21:54:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978598366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:02,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-06 21:54:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807000094] [2023-11-06 21:54:02,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:02,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:54:02,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:54:02,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=667, Unknown=2, NotChecked=106, Total=870 [2023-11-06 21:54:02,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 389 [2023-11-06 21:54:02,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 127 flow. Second operand has 30 states, 30 states have (on average 97.86666666666666) internal successors, (2936), 30 states have internal predecessors, (2936), 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 21:54:02,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:02,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 389 [2023-11-06 21:54:02,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:05,571 INFO L124 PetriNetUnfolderBase]: 698/1012 cut-off events. [2023-11-06 21:54:05,572 INFO L125 PetriNetUnfolderBase]: For 513/513 co-relation queries the response was YES. [2023-11-06 21:54:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 1012 events. 698/1012 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3956 event pairs, 34 based on Foata normal form. 1/1006 useless extension candidates. Maximal degree in co-relation 2598. Up to 655 conditions per place. [2023-11-06 21:54:05,584 INFO L140 encePairwiseOnDemand]: 377/389 looper letters, 82 selfloop transitions, 37 changer transitions 1/121 dead transitions. [2023-11-06 21:54:05,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 121 transitions, 658 flow [2023-11-06 21:54:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:54:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 21:54:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1751 transitions. [2023-11-06 21:54:05,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2647814910025707 [2023-11-06 21:54:05,595 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1751 transitions. [2023-11-06 21:54:05,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1751 transitions. [2023-11-06 21:54:05,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:05,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1751 transitions. [2023-11-06 21:54:05,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.0) internal successors, (1751), 17 states have internal predecessors, (1751), 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 21:54:05,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 389.0) internal successors, (7002), 18 states have internal predecessors, (7002), 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 21:54:05,620 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 389.0) internal successors, (7002), 18 states have internal predecessors, (7002), 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 21:54:05,620 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 127 flow. Second operand 17 states and 1751 transitions. [2023-11-06 21:54:05,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 121 transitions, 658 flow [2023-11-06 21:54:05,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 121 transitions, 642 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:05,628 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 375 flow [2023-11-06 21:54:05,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=375, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2023-11-06 21:54:05,631 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2023-11-06 21:54:05,634 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 375 flow [2023-11-06 21:54:05,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 97.86666666666666) internal successors, (2936), 30 states have internal predecessors, (2936), 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 21:54:05,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:05,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:05,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:05,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:05,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:05,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash -609468831, now seen corresponding path program 2 times [2023-11-06 21:54:05,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:05,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874086623] [2023-11-06 21:54:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:05,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:54:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874086623] [2023-11-06 21:54:06,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874086623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203903649] [2023-11-06 21:54:06,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:06,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:06,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:06,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:54:06,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:06,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:06,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:54:06,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:07,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:07,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 23 [2023-11-06 21:54:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:07,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:07,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:07,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:54:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203903649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:07,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 22 [2023-11-06 21:54:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544330738] [2023-11-06 21:54:07,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:07,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:09,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 389 [2023-11-06 21:54:09,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 375 flow. Second operand has 24 states, 24 states have (on average 136.875) internal successors, (3285), 24 states have internal predecessors, (3285), 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 21:54:09,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:09,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 389 [2023-11-06 21:54:09,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:10,853 INFO L124 PetriNetUnfolderBase]: 1101/1603 cut-off events. [2023-11-06 21:54:10,853 INFO L125 PetriNetUnfolderBase]: For 1883/1883 co-relation queries the response was YES. [2023-11-06 21:54:10,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 1603 events. 1101/1603 cut-off events. For 1883/1883 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5946 event pairs, 180 based on Foata normal form. 1/1601 useless extension candidates. Maximal degree in co-relation 4790. Up to 1128 conditions per place. [2023-11-06 21:54:10,871 INFO L140 encePairwiseOnDemand]: 376/389 looper letters, 110 selfloop transitions, 81 changer transitions 1/192 dead transitions. [2023-11-06 21:54:10,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 192 transitions, 1280 flow [2023-11-06 21:54:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:54:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 21:54:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3383 transitions. [2023-11-06 21:54:10,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36236075407026563 [2023-11-06 21:54:10,887 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3383 transitions. [2023-11-06 21:54:10,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3383 transitions. [2023-11-06 21:54:10,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:10,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3383 transitions. [2023-11-06 21:54:10,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 140.95833333333334) internal successors, (3383), 24 states have internal predecessors, (3383), 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 21:54:10,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 389.0) internal successors, (9725), 25 states have internal predecessors, (9725), 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 21:54:10,924 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 389.0) internal successors, (9725), 25 states have internal predecessors, (9725), 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 21:54:10,924 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 375 flow. Second operand 24 states and 3383 transitions. [2023-11-06 21:54:10,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 192 transitions, 1280 flow [2023-11-06 21:54:10,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 192 transitions, 1167 flow, removed 34 selfloop flow, removed 3 redundant places. [2023-11-06 21:54:10,941 INFO L231 Difference]: Finished difference. Result has 83 places, 133 transitions, 876 flow [2023-11-06 21:54:10,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=876, PETRI_PLACES=83, PETRI_TRANSITIONS=133} [2023-11-06 21:54:10,944 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2023-11-06 21:54:10,945 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 133 transitions, 876 flow [2023-11-06 21:54:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 136.875) internal successors, (3285), 24 states have internal predecessors, (3285), 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 21:54:10,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:10,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:10,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:11,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:11,164 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:11,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:11,165 INFO L85 PathProgramCache]: Analyzing trace with hash 873080177, now seen corresponding path program 3 times [2023-11-06 21:54:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:11,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504056327] [2023-11-06 21:54:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:11,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:13,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504056327] [2023-11-06 21:54:13,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504056327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:13,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873430415] [2023-11-06 21:54:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:13,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:13,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:13,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:13,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:54:13,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:54:13,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:13,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:54:13,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:13,602 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:13,603 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 19 [2023-11-06 21:54:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:13,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:13,709 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:13,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:54:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:14,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873430415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:14,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:14,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 24 [2023-11-06 21:54:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466863769] [2023-11-06 21:54:14,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:14,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:16,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 389 [2023-11-06 21:54:16,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 133 transitions, 876 flow. Second operand has 26 states, 26 states have (on average 129.23076923076923) internal successors, (3360), 26 states have internal predecessors, (3360), 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 21:54:16,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:16,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 389 [2023-11-06 21:54:16,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:17,769 INFO L124 PetriNetUnfolderBase]: 1359/1972 cut-off events. [2023-11-06 21:54:17,769 INFO L125 PetriNetUnfolderBase]: For 3581/3581 co-relation queries the response was YES. [2023-11-06 21:54:17,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7878 conditions, 1972 events. 1359/1972 cut-off events. For 3581/3581 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7671 event pairs, 202 based on Foata normal form. 1/1972 useless extension candidates. Maximal degree in co-relation 7387. Up to 1465 conditions per place. [2023-11-06 21:54:17,795 INFO L140 encePairwiseOnDemand]: 375/389 looper letters, 148 selfloop transitions, 127 changer transitions 1/276 dead transitions. [2023-11-06 21:54:17,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 276 transitions, 2200 flow [2023-11-06 21:54:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:54:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 21:54:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3208 transitions. [2023-11-06 21:54:17,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34361610968294776 [2023-11-06 21:54:17,810 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3208 transitions. [2023-11-06 21:54:17,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3208 transitions. [2023-11-06 21:54:17,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:17,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3208 transitions. [2023-11-06 21:54:17,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 133.66666666666666) internal successors, (3208), 24 states have internal predecessors, (3208), 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 21:54:17,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 389.0) internal successors, (9725), 25 states have internal predecessors, (9725), 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 21:54:17,854 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 389.0) internal successors, (9725), 25 states have internal predecessors, (9725), 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 21:54:17,862 INFO L175 Difference]: Start difference. First operand has 83 places, 133 transitions, 876 flow. Second operand 24 states and 3208 transitions. [2023-11-06 21:54:17,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 276 transitions, 2200 flow [2023-11-06 21:54:17,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 276 transitions, 2085 flow, removed 52 selfloop flow, removed 3 redundant places. [2023-11-06 21:54:17,894 INFO L231 Difference]: Finished difference. Result has 113 places, 206 transitions, 1727 flow [2023-11-06 21:54:17,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1727, PETRI_PLACES=113, PETRI_TRANSITIONS=206} [2023-11-06 21:54:17,895 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 82 predicate places. [2023-11-06 21:54:17,896 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 206 transitions, 1727 flow [2023-11-06 21:54:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 129.23076923076923) internal successors, (3360), 26 states have internal predecessors, (3360), 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 21:54:17,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:17,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:17,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:18,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:18,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:18,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1118235279, now seen corresponding path program 4 times [2023-11-06 21:54:18,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:18,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053955572] [2023-11-06 21:54:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:19,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:19,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053955572] [2023-11-06 21:54:19,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053955572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181287143] [2023-11-06 21:54:19,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:54:19,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:19,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:19,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:19,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:54:19,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:54:19,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:19,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:54:19,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:20,337 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:20,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 19 [2023-11-06 21:54:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:20,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:20,427 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:20,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:54:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:20,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181287143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:20,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:20,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-11-06 21:54:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794422448] [2023-11-06 21:54:20,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:54:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:54:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:54:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 389 [2023-11-06 21:54:23,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 206 transitions, 1727 flow. Second operand has 27 states, 27 states have (on average 129.25925925925927) internal successors, (3490), 27 states have internal predecessors, (3490), 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 21:54:23,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:23,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 389 [2023-11-06 21:54:23,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:24,797 INFO L124 PetriNetUnfolderBase]: 1535/2227 cut-off events. [2023-11-06 21:54:24,797 INFO L125 PetriNetUnfolderBase]: For 5976/5976 co-relation queries the response was YES. [2023-11-06 21:54:24,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9994 conditions, 2227 events. 1535/2227 cut-off events. For 5976/5976 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8912 event pairs, 204 based on Foata normal form. 1/2210 useless extension candidates. Maximal degree in co-relation 9482. Up to 1616 conditions per place. [2023-11-06 21:54:24,833 INFO L140 encePairwiseOnDemand]: 375/389 looper letters, 140 selfloop transitions, 159 changer transitions 1/300 dead transitions. [2023-11-06 21:54:24,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 300 transitions, 2827 flow [2023-11-06 21:54:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:54:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 21:54:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2949 transitions. [2023-11-06 21:54:24,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445898574433279 [2023-11-06 21:54:24,848 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2949 transitions. [2023-11-06 21:54:24,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2949 transitions. [2023-11-06 21:54:24,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:24,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2949 transitions. [2023-11-06 21:54:24,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 134.04545454545453) internal successors, (2949), 22 states have internal predecessors, (2949), 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 21:54:24,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 389.0) internal successors, (8947), 23 states have internal predecessors, (8947), 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 21:54:24,879 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 389.0) internal successors, (8947), 23 states have internal predecessors, (8947), 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 21:54:24,879 INFO L175 Difference]: Start difference. First operand has 113 places, 206 transitions, 1727 flow. Second operand 22 states and 2949 transitions. [2023-11-06 21:54:24,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 300 transitions, 2827 flow [2023-11-06 21:54:24,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 300 transitions, 2693 flow, removed 39 selfloop flow, removed 6 redundant places. [2023-11-06 21:54:24,921 INFO L231 Difference]: Finished difference. Result has 133 places, 235 transitions, 2304 flow [2023-11-06 21:54:24,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2304, PETRI_PLACES=133, PETRI_TRANSITIONS=235} [2023-11-06 21:54:24,925 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2023-11-06 21:54:24,925 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 235 transitions, 2304 flow [2023-11-06 21:54:24,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 129.25925925925927) internal successors, (3490), 27 states have internal predecessors, (3490), 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 21:54:24,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:24,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:24,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:25,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:25,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:25,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1074045553, now seen corresponding path program 5 times [2023-11-06 21:54:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:25,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634698667] [2023-11-06 21:54:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:54:25,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:25,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634698667] [2023-11-06 21:54:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634698667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687365103] [2023-11-06 21:54:25,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:54:25,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:25,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:25,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:54:25,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:54:25,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:25,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 21:54:25,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:26,477 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-11-06 21:54:26,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-11-06 21:54:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:26,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:26,708 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:26,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-06 21:54:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:27,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687365103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:27,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:27,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 20 [2023-11-06 21:54:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482819320] [2023-11-06 21:54:27,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:27,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 21:54:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 21:54:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:54:28,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 389 [2023-11-06 21:54:28,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 235 transitions, 2304 flow. Second operand has 22 states, 22 states have (on average 138.63636363636363) internal successors, (3050), 22 states have internal predecessors, (3050), 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 21:54:28,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:28,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 389 [2023-11-06 21:54:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:30,693 INFO L124 PetriNetUnfolderBase]: 1958/2894 cut-off events. [2023-11-06 21:54:30,693 INFO L125 PetriNetUnfolderBase]: For 12334/12380 co-relation queries the response was YES. [2023-11-06 21:54:30,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14697 conditions, 2894 events. 1958/2894 cut-off events. For 12334/12380 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13129 event pairs, 164 based on Foata normal form. 1/2846 useless extension candidates. Maximal degree in co-relation 14205. Up to 1754 conditions per place. [2023-11-06 21:54:30,743 INFO L140 encePairwiseOnDemand]: 376/389 looper letters, 186 selfloop transitions, 254 changer transitions 1/457 dead transitions. [2023-11-06 21:54:30,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 457 transitions, 4838 flow [2023-11-06 21:54:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:54:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 21:54:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5408 transitions. [2023-11-06 21:54:30,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585035854417536 [2023-11-06 21:54:30,755 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5408 transitions. [2023-11-06 21:54:30,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5408 transitions. [2023-11-06 21:54:30,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:30,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5408 transitions. [2023-11-06 21:54:30,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 142.31578947368422) internal successors, (5408), 38 states have internal predecessors, (5408), 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 21:54:30,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 389.0) internal successors, (15171), 39 states have internal predecessors, (15171), 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 21:54:30,793 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 389.0) internal successors, (15171), 39 states have internal predecessors, (15171), 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 21:54:30,793 INFO L175 Difference]: Start difference. First operand has 133 places, 235 transitions, 2304 flow. Second operand 38 states and 5408 transitions. [2023-11-06 21:54:30,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 457 transitions, 4838 flow [2023-11-06 21:54:30,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 457 transitions, 4675 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-11-06 21:54:30,875 INFO L231 Difference]: Finished difference. Result has 162 places, 361 transitions, 4030 flow [2023-11-06 21:54:30,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4030, PETRI_PLACES=162, PETRI_TRANSITIONS=361} [2023-11-06 21:54:30,878 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2023-11-06 21:54:30,878 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 361 transitions, 4030 flow [2023-11-06 21:54:30,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 138.63636363636363) internal successors, (3050), 22 states have internal predecessors, (3050), 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 21:54:30,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:30,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:30,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:31,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:31,089 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:31,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash -198407583, now seen corresponding path program 6 times [2023-11-06 21:54:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:31,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752243668] [2023-11-06 21:54:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:31,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:32,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:32,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752243668] [2023-11-06 21:54:32,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752243668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608890588] [2023-11-06 21:54:32,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:54:32,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:32,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:32,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:32,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:54:32,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 21:54:32,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:32,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:54:32,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:32,805 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:32,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 23 [2023-11-06 21:54:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:32,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:32,926 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:32,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-06 21:54:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:33,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608890588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:33,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:33,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-11-06 21:54:33,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502844891] [2023-11-06 21:54:33,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:33,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:54:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:54:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:54:35,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 389 [2023-11-06 21:54:35,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 361 transitions, 4030 flow. Second operand has 27 states, 27 states have (on average 131.25925925925927) internal successors, (3544), 27 states have internal predecessors, (3544), 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 21:54:35,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:35,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 389 [2023-11-06 21:54:35,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:36,731 INFO L124 PetriNetUnfolderBase]: 2342/3384 cut-off events. [2023-11-06 21:54:36,731 INFO L125 PetriNetUnfolderBase]: For 15023/15023 co-relation queries the response was YES. [2023-11-06 21:54:36,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17875 conditions, 3384 events. 2342/3384 cut-off events. For 15023/15023 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14768 event pairs, 311 based on Foata normal form. 1/3367 useless extension candidates. Maximal degree in co-relation 17225. Up to 2860 conditions per place. [2023-11-06 21:54:36,785 INFO L140 encePairwiseOnDemand]: 376/389 looper letters, 241 selfloop transitions, 187 changer transitions 1/429 dead transitions. [2023-11-06 21:54:36,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 429 transitions, 5377 flow [2023-11-06 21:54:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:54:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:54:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2837 transitions. [2023-11-06 21:54:36,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34728852980781 [2023-11-06 21:54:36,793 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2837 transitions. [2023-11-06 21:54:36,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2837 transitions. [2023-11-06 21:54:36,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:36,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2837 transitions. [2023-11-06 21:54:36,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 135.0952380952381) internal successors, (2837), 21 states have internal predecessors, (2837), 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 21:54:36,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 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 21:54:36,813 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 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 21:54:36,813 INFO L175 Difference]: Start difference. First operand has 162 places, 361 transitions, 4030 flow. Second operand 21 states and 2837 transitions. [2023-11-06 21:54:36,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 429 transitions, 5377 flow [2023-11-06 21:54:36,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 429 transitions, 4514 flow, removed 377 selfloop flow, removed 10 redundant places. [2023-11-06 21:54:36,952 INFO L231 Difference]: Finished difference. Result has 177 places, 383 transitions, 3988 flow [2023-11-06 21:54:36,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3988, PETRI_PLACES=177, PETRI_TRANSITIONS=383} [2023-11-06 21:54:36,953 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 146 predicate places. [2023-11-06 21:54:36,954 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 383 transitions, 3988 flow [2023-11-06 21:54:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 131.25925925925927) internal successors, (3544), 27 states have internal predecessors, (3544), 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 21:54:36,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:36,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:36,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:37,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:37,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:37,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1431134668, now seen corresponding path program 7 times [2023-11-06 21:54:37,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:37,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491631035] [2023-11-06 21:54:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:37,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:37,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491631035] [2023-11-06 21:54:37,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491631035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:37,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52972526] [2023-11-06 21:54:37,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:54:37,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:37,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:37,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:54:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:37,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:54:37,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:37,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52972526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:37,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:37,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 21:54:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064835637] [2023-11-06 21:54:37,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:54:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:54:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:54:38,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 389 [2023-11-06 21:54:38,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 383 transitions, 3988 flow. Second operand has 14 states, 14 states have (on average 161.42857142857142) internal successors, (2260), 14 states have internal predecessors, (2260), 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 21:54:38,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:38,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 389 [2023-11-06 21:54:38,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:39,386 INFO L124 PetriNetUnfolderBase]: 3462/5064 cut-off events. [2023-11-06 21:54:39,386 INFO L125 PetriNetUnfolderBase]: For 21588/22156 co-relation queries the response was YES. [2023-11-06 21:54:39,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23489 conditions, 5064 events. 3462/5064 cut-off events. For 21588/22156 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25952 event pairs, 915 based on Foata normal form. 37/4807 useless extension candidates. Maximal degree in co-relation 23094. Up to 2563 conditions per place. [2023-11-06 21:54:39,446 INFO L140 encePairwiseOnDemand]: 384/389 looper letters, 413 selfloop transitions, 14 changer transitions 0/469 dead transitions. [2023-11-06 21:54:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 469 transitions, 5096 flow [2023-11-06 21:54:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:54:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:54:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1322 transitions. [2023-11-06 21:54:39,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42480719794344474 [2023-11-06 21:54:39,454 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1322 transitions. [2023-11-06 21:54:39,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1322 transitions. [2023-11-06 21:54:39,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:39,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1322 transitions. [2023-11-06 21:54:39,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 165.25) internal successors, (1322), 8 states have internal predecessors, (1322), 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 21:54:39,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 389.0) internal successors, (3501), 9 states have internal predecessors, (3501), 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 21:54:39,464 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 389.0) internal successors, (3501), 9 states have internal predecessors, (3501), 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 21:54:39,464 INFO L175 Difference]: Start difference. First operand has 177 places, 383 transitions, 3988 flow. Second operand 8 states and 1322 transitions. [2023-11-06 21:54:39,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 469 transitions, 5096 flow [2023-11-06 21:54:39,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 469 transitions, 4704 flow, removed 41 selfloop flow, removed 23 redundant places. [2023-11-06 21:54:39,559 INFO L231 Difference]: Finished difference. Result has 158 places, 299 transitions, 2546 flow [2023-11-06 21:54:39,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2546, PETRI_PLACES=158, PETRI_TRANSITIONS=299} [2023-11-06 21:54:39,562 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2023-11-06 21:54:39,562 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 299 transitions, 2546 flow [2023-11-06 21:54:39,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 161.42857142857142) internal successors, (2260), 14 states have internal predecessors, (2260), 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 21:54:39,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:39,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:39,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:39,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:54:39,774 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:39,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1382621900, now seen corresponding path program 8 times [2023-11-06 21:54:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:39,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585822334] [2023-11-06 21:54:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:39,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:39,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585822334] [2023-11-06 21:54:39,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585822334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:39,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329555291] [2023-11-06 21:54:39,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:39,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:39,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:39,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:54:40,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:40,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:40,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:54:40,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:40,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:40,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329555291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:40,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:40,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 21:54:40,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599888107] [2023-11-06 21:54:40,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:40,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:54:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:54:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:54:40,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 389 [2023-11-06 21:54:40,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 299 transitions, 2546 flow. Second operand has 14 states, 14 states have (on average 156.5) internal successors, (2191), 14 states have internal predecessors, (2191), 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 21:54:40,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:40,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 389 [2023-11-06 21:54:40,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:41,662 INFO L124 PetriNetUnfolderBase]: 3673/5622 cut-off events. [2023-11-06 21:54:41,662 INFO L125 PetriNetUnfolderBase]: For 19777/19933 co-relation queries the response was YES. [2023-11-06 21:54:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24516 conditions, 5622 events. 3673/5622 cut-off events. For 19777/19933 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31496 event pairs, 615 based on Foata normal form. 350/5769 useless extension candidates. Maximal degree in co-relation 24037. Up to 2182 conditions per place. [2023-11-06 21:54:41,722 INFO L140 encePairwiseOnDemand]: 381/389 looper letters, 325 selfloop transitions, 59 changer transitions 0/410 dead transitions. [2023-11-06 21:54:41,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 410 transitions, 4008 flow [2023-11-06 21:54:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:54:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 21:54:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1612 transitions. [2023-11-06 21:54:41,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41439588688946016 [2023-11-06 21:54:41,726 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1612 transitions. [2023-11-06 21:54:41,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1612 transitions. [2023-11-06 21:54:41,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:41,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1612 transitions. [2023-11-06 21:54:41,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 161.2) internal successors, (1612), 10 states have internal predecessors, (1612), 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 21:54:41,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 389.0) internal successors, (4279), 11 states have internal predecessors, (4279), 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 21:54:41,735 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 389.0) internal successors, (4279), 11 states have internal predecessors, (4279), 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 21:54:41,735 INFO L175 Difference]: Start difference. First operand has 158 places, 299 transitions, 2546 flow. Second operand 10 states and 1612 transitions. [2023-11-06 21:54:41,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 410 transitions, 4008 flow [2023-11-06 21:54:41,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 410 transitions, 3977 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-06 21:54:41,967 INFO L231 Difference]: Finished difference. Result has 164 places, 307 transitions, 2799 flow [2023-11-06 21:54:41,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2799, PETRI_PLACES=164, PETRI_TRANSITIONS=307} [2023-11-06 21:54:41,969 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 133 predicate places. [2023-11-06 21:54:41,969 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 307 transitions, 2799 flow [2023-11-06 21:54:41,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.5) internal successors, (2191), 14 states have internal predecessors, (2191), 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 21:54:41,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:41,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:41,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:42,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:54:42,177 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:42,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -55405108, now seen corresponding path program 1 times [2023-11-06 21:54:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968924977] [2023-11-06 21:54:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:42,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:42,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968924977] [2023-11-06 21:54:42,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968924977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443039570] [2023-11-06 21:54:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:42,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:42,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:54:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:42,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:54:42,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:42,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:42,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443039570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:42,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:42,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 21:54:42,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547894466] [2023-11-06 21:54:42,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:42,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:54:42,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:54:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:54:43,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 389 [2023-11-06 21:54:43,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 307 transitions, 2799 flow. Second operand has 14 states, 14 states have (on average 154.78571428571428) internal successors, (2167), 14 states have internal predecessors, (2167), 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 21:54:43,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:43,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 389 [2023-11-06 21:54:43,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:44,164 INFO L124 PetriNetUnfolderBase]: 3295/5098 cut-off events. [2023-11-06 21:54:44,164 INFO L125 PetriNetUnfolderBase]: For 18571/18624 co-relation queries the response was YES. [2023-11-06 21:54:44,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22256 conditions, 5098 events. 3295/5098 cut-off events. For 18571/18624 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 28218 event pairs, 839 based on Foata normal form. 437/5370 useless extension candidates. Maximal degree in co-relation 21772. Up to 2272 conditions per place. [2023-11-06 21:54:44,212 INFO L140 encePairwiseOnDemand]: 381/389 looper letters, 270 selfloop transitions, 32 changer transitions 38/372 dead transitions. [2023-11-06 21:54:44,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 372 transitions, 3803 flow [2023-11-06 21:54:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 21:54:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1430 transitions. [2023-11-06 21:54:44,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40845472722079407 [2023-11-06 21:54:44,216 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1430 transitions. [2023-11-06 21:54:44,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1430 transitions. [2023-11-06 21:54:44,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:44,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1430 transitions. [2023-11-06 21:54:44,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.88888888888889) internal successors, (1430), 9 states have internal predecessors, (1430), 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 21:54:44,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 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 21:54:44,223 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 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 21:54:44,224 INFO L175 Difference]: Start difference. First operand has 164 places, 307 transitions, 2799 flow. Second operand 9 states and 1430 transitions. [2023-11-06 21:54:44,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 372 transitions, 3803 flow [2023-11-06 21:54:44,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 372 transitions, 3745 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-11-06 21:54:44,343 INFO L231 Difference]: Finished difference. Result has 166 places, 260 transitions, 2475 flow [2023-11-06 21:54:44,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2475, PETRI_PLACES=166, PETRI_TRANSITIONS=260} [2023-11-06 21:54:44,345 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2023-11-06 21:54:44,345 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 260 transitions, 2475 flow [2023-11-06 21:54:44,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.78571428571428) internal successors, (2167), 14 states have internal predecessors, (2167), 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 21:54:44,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:44,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:44,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:44,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:54:44,552 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:44,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1012330550, now seen corresponding path program 9 times [2023-11-06 21:54:44,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:44,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273624451] [2023-11-06 21:54:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:44,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:44,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:44,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273624451] [2023-11-06 21:54:44,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273624451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:44,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299057469] [2023-11-06 21:54:44,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:44,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:44,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:44,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:44,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:54:44,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:54:44,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:44,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:54:44,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:45,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:54:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299057469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:45,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:45,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 21:54:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856379849] [2023-11-06 21:54:45,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:45,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:54:45,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:54:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:54:45,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 389 [2023-11-06 21:54:45,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 260 transitions, 2475 flow. Second operand has 15 states, 15 states have (on average 154.93333333333334) internal successors, (2324), 15 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:45,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:45,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 389 [2023-11-06 21:54:45,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:46,360 INFO L124 PetriNetUnfolderBase]: 1793/3035 cut-off events. [2023-11-06 21:54:46,361 INFO L125 PetriNetUnfolderBase]: For 14248/14712 co-relation queries the response was YES. [2023-11-06 21:54:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14640 conditions, 3035 events. 1793/3035 cut-off events. For 14248/14712 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17626 event pairs, 399 based on Foata normal form. 332/3302 useless extension candidates. Maximal degree in co-relation 14583. Up to 1431 conditions per place. [2023-11-06 21:54:46,395 INFO L140 encePairwiseOnDemand]: 381/389 looper letters, 148 selfloop transitions, 6 changer transitions 101/268 dead transitions. [2023-11-06 21:54:46,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 268 transitions, 2917 flow [2023-11-06 21:54:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:54:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 21:54:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1588 transitions. [2023-11-06 21:54:46,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40822622107969153 [2023-11-06 21:54:46,399 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1588 transitions. [2023-11-06 21:54:46,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1588 transitions. [2023-11-06 21:54:46,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:46,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1588 transitions. [2023-11-06 21:54:46,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 158.8) internal successors, (1588), 10 states have internal predecessors, (1588), 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 21:54:46,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 389.0) internal successors, (4279), 11 states have internal predecessors, (4279), 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 21:54:46,407 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 389.0) internal successors, (4279), 11 states have internal predecessors, (4279), 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 21:54:46,408 INFO L175 Difference]: Start difference. First operand has 166 places, 260 transitions, 2475 flow. Second operand 10 states and 1588 transitions. [2023-11-06 21:54:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 268 transitions, 2917 flow [2023-11-06 21:54:46,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 268 transitions, 2728 flow, removed 30 selfloop flow, removed 11 redundant places. [2023-11-06 21:54:46,493 INFO L231 Difference]: Finished difference. Result has 160 places, 167 transitions, 1395 flow [2023-11-06 21:54:46,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1395, PETRI_PLACES=160, PETRI_TRANSITIONS=167} [2023-11-06 21:54:46,495 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2023-11-06 21:54:46,495 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 167 transitions, 1395 flow [2023-11-06 21:54:46,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 154.93333333333334) internal successors, (2324), 15 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:46,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:46,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:46,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:46,702 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:46,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash -999323598, now seen corresponding path program 10 times [2023-11-06 21:54:46,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:46,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228434059] [2023-11-06 21:54:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:46,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:54:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:46,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228434059] [2023-11-06 21:54:46,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228434059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:46,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484547779] [2023-11-06 21:54:46,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:54:46,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:46,862 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:46,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:54:47,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:54:47,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:47,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:54:47,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:54:47,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:54:47,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484547779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:47,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:47,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-11-06 21:54:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492649021] [2023-11-06 21:54:47,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:47,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:54:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:47,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:54:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:54:47,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 389 [2023-11-06 21:54:47,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 167 transitions, 1395 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 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 21:54:47,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:47,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 389 [2023-11-06 21:54:47,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:48,657 INFO L124 PetriNetUnfolderBase]: 1006/1469 cut-off events. [2023-11-06 21:54:48,657 INFO L125 PetriNetUnfolderBase]: For 8384/8384 co-relation queries the response was YES. [2023-11-06 21:54:48,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7588 conditions, 1469 events. 1006/1469 cut-off events. For 8384/8384 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5598 event pairs, 92 based on Foata normal form. 114/1573 useless extension candidates. Maximal degree in co-relation 7550. Up to 601 conditions per place. [2023-11-06 21:54:48,671 INFO L140 encePairwiseOnDemand]: 375/389 looper letters, 148 selfloop transitions, 140 changer transitions 0/288 dead transitions. [2023-11-06 21:54:48,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 288 transitions, 3006 flow [2023-11-06 21:54:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:54:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:54:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3116 transitions. [2023-11-06 21:54:48,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38144203696902923 [2023-11-06 21:54:48,677 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3116 transitions. [2023-11-06 21:54:48,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3116 transitions. [2023-11-06 21:54:48,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:48,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3116 transitions. [2023-11-06 21:54:48,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 148.38095238095238) internal successors, (3116), 21 states have internal predecessors, (3116), 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 21:54:48,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 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 21:54:48,693 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 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 21:54:48,693 INFO L175 Difference]: Start difference. First operand has 160 places, 167 transitions, 1395 flow. Second operand 21 states and 3116 transitions. [2023-11-06 21:54:48,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 288 transitions, 3006 flow [2023-11-06 21:54:48,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 288 transitions, 2804 flow, removed 95 selfloop flow, removed 11 redundant places. [2023-11-06 21:54:48,767 INFO L231 Difference]: Finished difference. Result has 131 places, 209 transitions, 2302 flow [2023-11-06 21:54:48,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2302, PETRI_PLACES=131, PETRI_TRANSITIONS=209} [2023-11-06 21:54:48,769 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2023-11-06 21:54:48,770 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 209 transitions, 2302 flow [2023-11-06 21:54:48,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 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 21:54:48,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:48,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:48,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:48,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:54:48,979 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:48,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash 50951135, now seen corresponding path program 11 times [2023-11-06 21:54:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:48,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970859608] [2023-11-06 21:54:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:54:49,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970859608] [2023-11-06 21:54:49,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970859608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660820992] [2023-11-06 21:54:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:54:49,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:49,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:49,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:49,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:54:49,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:54:49,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:49,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:54:49,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:49,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:49,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660820992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:49,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:49,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2023-11-06 21:54:49,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019576977] [2023-11-06 21:54:49,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:54:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:54:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:54:50,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 389 [2023-11-06 21:54:50,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 209 transitions, 2302 flow. Second operand has 21 states, 21 states have (on average 144.52380952380952) internal successors, (3035), 21 states have internal predecessors, (3035), 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 21:54:50,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:50,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 389 [2023-11-06 21:54:50,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:52,139 INFO L124 PetriNetUnfolderBase]: 1470/2083 cut-off events. [2023-11-06 21:54:52,139 INFO L125 PetriNetUnfolderBase]: For 20299/20299 co-relation queries the response was YES. [2023-11-06 21:54:52,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13903 conditions, 2083 events. 1470/2083 cut-off events. For 20299/20299 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8119 event pairs, 106 based on Foata normal form. 26/2099 useless extension candidates. Maximal degree in co-relation 13862. Up to 911 conditions per place. [2023-11-06 21:54:52,202 INFO L140 encePairwiseOnDemand]: 375/389 looper letters, 237 selfloop transitions, 273 changer transitions 0/510 dead transitions. [2023-11-06 21:54:52,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 510 transitions, 6674 flow [2023-11-06 21:54:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:54:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 21:54:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5637 transitions. [2023-11-06 21:54:52,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813421729130023 [2023-11-06 21:54:52,214 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5637 transitions. [2023-11-06 21:54:52,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5637 transitions. [2023-11-06 21:54:52,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:52,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5637 transitions. [2023-11-06 21:54:52,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 148.3421052631579) internal successors, (5637), 38 states have internal predecessors, (5637), 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 21:54:52,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 389.0) internal successors, (15171), 39 states have internal predecessors, (15171), 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 21:54:52,251 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 389.0) internal successors, (15171), 39 states have internal predecessors, (15171), 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 21:54:52,251 INFO L175 Difference]: Start difference. First operand has 131 places, 209 transitions, 2302 flow. Second operand 38 states and 5637 transitions. [2023-11-06 21:54:52,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 510 transitions, 6674 flow [2023-11-06 21:54:52,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 510 transitions, 5969 flow, removed 247 selfloop flow, removed 8 redundant places. [2023-11-06 21:54:52,353 INFO L231 Difference]: Finished difference. Result has 172 places, 390 transitions, 4981 flow [2023-11-06 21:54:52,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4981, PETRI_PLACES=172, PETRI_TRANSITIONS=390} [2023-11-06 21:54:52,354 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2023-11-06 21:54:52,354 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 390 transitions, 4981 flow [2023-11-06 21:54:52,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 144.52380952380952) internal successors, (3035), 21 states have internal predecessors, (3035), 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 21:54:52,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:52,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:52,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:52,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:54:52,562 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:52,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1794972313, now seen corresponding path program 12 times [2023-11-06 21:54:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466185613] [2023-11-06 21:54:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:54:52,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:52,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466185613] [2023-11-06 21:54:52,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466185613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:52,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416260703] [2023-11-06 21:54:52,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:54:52,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:52,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:52,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:54:52,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:54:52,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:52,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:54:52,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:54:53,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:54:53,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416260703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:53,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:53,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-06 21:54:53,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815035915] [2023-11-06 21:54:53,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:53,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:54:53,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:53,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:54:53,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:54:53,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 389 [2023-11-06 21:54:53,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 390 transitions, 4981 flow. Second operand has 18 states, 18 states have (on average 149.22222222222223) internal successors, (2686), 18 states have internal predecessors, (2686), 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 21:54:53,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:53,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 389 [2023-11-06 21:54:53,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:54,728 INFO L124 PetriNetUnfolderBase]: 1539/2229 cut-off events. [2023-11-06 21:54:54,728 INFO L125 PetriNetUnfolderBase]: For 30426/30426 co-relation queries the response was YES. [2023-11-06 21:54:54,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16382 conditions, 2229 events. 1539/2229 cut-off events. For 30426/30426 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9124 event pairs, 197 based on Foata normal form. 30/2248 useless extension candidates. Maximal degree in co-relation 16330. Up to 981 conditions per place. [2023-11-06 21:54:54,754 INFO L140 encePairwiseOnDemand]: 378/389 looper letters, 355 selfloop transitions, 133 changer transitions 0/510 dead transitions. [2023-11-06 21:54:54,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 510 transitions, 7129 flow [2023-11-06 21:54:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:54:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 21:54:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1688 transitions. [2023-11-06 21:54:54,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944846926852068 [2023-11-06 21:54:54,758 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1688 transitions. [2023-11-06 21:54:54,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1688 transitions. [2023-11-06 21:54:54,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:54,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1688 transitions. [2023-11-06 21:54:54,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 153.45454545454547) internal successors, (1688), 11 states have internal predecessors, (1688), 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 21:54:54,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 389.0) internal successors, (4668), 12 states have internal predecessors, (4668), 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 21:54:54,765 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 389.0) internal successors, (4668), 12 states have internal predecessors, (4668), 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 21:54:54,765 INFO L175 Difference]: Start difference. First operand has 172 places, 390 transitions, 4981 flow. Second operand 11 states and 1688 transitions. [2023-11-06 21:54:54,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 510 transitions, 7129 flow [2023-11-06 21:54:54,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 510 transitions, 5801 flow, removed 637 selfloop flow, removed 6 redundant places. [2023-11-06 21:54:54,984 INFO L231 Difference]: Finished difference. Result has 179 places, 398 transitions, 4262 flow [2023-11-06 21:54:54,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4262, PETRI_PLACES=179, PETRI_TRANSITIONS=398} [2023-11-06 21:54:54,985 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2023-11-06 21:54:54,985 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 398 transitions, 4262 flow [2023-11-06 21:54:54,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 149.22222222222223) internal successors, (2686), 18 states have internal predecessors, (2686), 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 21:54:54,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:54,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:54,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:55,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:54:55,193 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:55,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -867463923, now seen corresponding path program 13 times [2023-11-06 21:54:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:55,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084041759] [2023-11-06 21:54:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:55,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:54:55,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084041759] [2023-11-06 21:54:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084041759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487252831] [2023-11-06 21:54:55,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:54:55,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:55,354 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:55,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:54:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:55,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:54:55,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:54:55,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:54:55,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487252831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:55,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:55,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 21:54:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745049155] [2023-11-06 21:54:55,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:55,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:54:55,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:54:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:54:56,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 389 [2023-11-06 21:54:56,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 398 transitions, 4262 flow. Second operand has 19 states, 19 states have (on average 149.31578947368422) internal successors, (2837), 19 states have internal predecessors, (2837), 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 21:54:56,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:56,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 389 [2023-11-06 21:54:56,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:57,124 INFO L124 PetriNetUnfolderBase]: 1884/2743 cut-off events. [2023-11-06 21:54:57,124 INFO L125 PetriNetUnfolderBase]: For 35482/35485 co-relation queries the response was YES. [2023-11-06 21:54:57,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18313 conditions, 2743 events. 1884/2743 cut-off events. For 35482/35485 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11645 event pairs, 244 based on Foata normal form. 18/2735 useless extension candidates. Maximal degree in co-relation 18259. Up to 1271 conditions per place. [2023-11-06 21:54:57,158 INFO L140 encePairwiseOnDemand]: 378/389 looper letters, 360 selfloop transitions, 137 changer transitions 0/519 dead transitions. [2023-11-06 21:54:57,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 519 transitions, 6584 flow [2023-11-06 21:54:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:54:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 21:54:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1687 transitions. [2023-11-06 21:54:57,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39425099322271556 [2023-11-06 21:54:57,162 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1687 transitions. [2023-11-06 21:54:57,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1687 transitions. [2023-11-06 21:54:57,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:57,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1687 transitions. [2023-11-06 21:54:57,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 153.36363636363637) internal successors, (1687), 11 states have internal predecessors, (1687), 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 21:54:57,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 389.0) internal successors, (4668), 12 states have internal predecessors, (4668), 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 21:54:57,172 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 389.0) internal successors, (4668), 12 states have internal predecessors, (4668), 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 21:54:57,172 INFO L175 Difference]: Start difference. First operand has 179 places, 398 transitions, 4262 flow. Second operand 11 states and 1687 transitions. [2023-11-06 21:54:57,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 519 transitions, 6584 flow [2023-11-06 21:54:57,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 519 transitions, 6316 flow, removed 22 selfloop flow, removed 8 redundant places. [2023-11-06 21:54:57,357 INFO L231 Difference]: Finished difference. Result has 184 places, 423 transitions, 4778 flow [2023-11-06 21:54:57,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4778, PETRI_PLACES=184, PETRI_TRANSITIONS=423} [2023-11-06 21:54:57,358 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2023-11-06 21:54:57,359 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 423 transitions, 4778 flow [2023-11-06 21:54:57,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 149.31578947368422) internal successors, (2837), 19 states have internal predecessors, (2837), 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 21:54:57,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:57,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:57,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:57,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:54:57,561 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:57,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1538784027, now seen corresponding path program 14 times [2023-11-06 21:54:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991027475] [2023-11-06 21:54:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:57,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991027475] [2023-11-06 21:54:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991027475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937567783] [2023-11-06 21:54:57,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:57,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:57,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:57,742 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:57,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:54:57,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:57,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:54:57,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:58,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:58,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937567783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:58,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:58,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 21:54:58,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90929111] [2023-11-06 21:54:58,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:58,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:54:58,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:58,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:54:58,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:54:58,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 389 [2023-11-06 21:54:58,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 423 transitions, 4778 flow. Second operand has 19 states, 19 states have (on average 149.3684210526316) internal successors, (2838), 19 states have internal predecessors, (2838), 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 21:54:58,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:58,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 389 [2023-11-06 21:54:58,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:59,890 INFO L124 PetriNetUnfolderBase]: 1922/2807 cut-off events. [2023-11-06 21:54:59,890 INFO L125 PetriNetUnfolderBase]: For 37676/37680 co-relation queries the response was YES. [2023-11-06 21:54:59,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19576 conditions, 2807 events. 1922/2807 cut-off events. For 37676/37680 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12086 event pairs, 395 based on Foata normal form. 28/2809 useless extension candidates. Maximal degree in co-relation 19520. Up to 1997 conditions per place. [2023-11-06 21:54:59,921 INFO L140 encePairwiseOnDemand]: 378/389 looper letters, 321 selfloop transitions, 148 changer transitions 0/491 dead transitions. [2023-11-06 21:54:59,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 491 transitions, 6423 flow [2023-11-06 21:54:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:54:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 21:54:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1682 transitions. [2023-11-06 21:54:59,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930824959102594 [2023-11-06 21:54:59,923 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1682 transitions. [2023-11-06 21:54:59,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1682 transitions. [2023-11-06 21:54:59,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:59,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1682 transitions. [2023-11-06 21:54:59,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 152.9090909090909) internal successors, (1682), 11 states have internal predecessors, (1682), 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 21:54:59,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 389.0) internal successors, (4668), 12 states have internal predecessors, (4668), 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 21:54:59,930 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 389.0) internal successors, (4668), 12 states have internal predecessors, (4668), 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 21:54:59,931 INFO L175 Difference]: Start difference. First operand has 184 places, 423 transitions, 4778 flow. Second operand 11 states and 1682 transitions. [2023-11-06 21:54:59,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 491 transitions, 6423 flow [2023-11-06 21:55:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 491 transitions, 6194 flow, removed 43 selfloop flow, removed 7 redundant places. [2023-11-06 21:55:00,106 INFO L231 Difference]: Finished difference. Result has 189 places, 434 transitions, 5082 flow [2023-11-06 21:55:00,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5082, PETRI_PLACES=189, PETRI_TRANSITIONS=434} [2023-11-06 21:55:00,108 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2023-11-06 21:55:00,108 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 434 transitions, 5082 flow [2023-11-06 21:55:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 149.3684210526316) internal successors, (2838), 19 states have internal predecessors, (2838), 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 21:55:00,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:00,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:00,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:00,315 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:00,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash 75998797, now seen corresponding path program 15 times [2023-11-06 21:55:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:00,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792795912] [2023-11-06 21:55:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:00,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:00,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792795912] [2023-11-06 21:55:00,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792795912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:00,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062965313] [2023-11-06 21:55:00,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:55:00,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:00,494 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:00,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:55:00,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:55:00,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:00,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:55:00,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:00,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:01,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062965313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:01,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:01,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-06 21:55:01,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739459929] [2023-11-06 21:55:01,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:01,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:55:01,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:55:01,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:55:01,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 389 [2023-11-06 21:55:01,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 434 transitions, 5082 flow. Second operand has 20 states, 20 states have (on average 149.15) internal successors, (2983), 20 states have internal predecessors, (2983), 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 21:55:01,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:01,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 389 [2023-11-06 21:55:01,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:02,969 INFO L124 PetriNetUnfolderBase]: 2233/3264 cut-off events. [2023-11-06 21:55:02,969 INFO L125 PetriNetUnfolderBase]: For 44203/44206 co-relation queries the response was YES. [2023-11-06 21:55:02,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22969 conditions, 3264 events. 2233/3264 cut-off events. For 44203/44206 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14549 event pairs, 244 based on Foata normal form. 20/3262 useless extension candidates. Maximal degree in co-relation 22911. Up to 1450 conditions per place. [2023-11-06 21:55:03,004 INFO L140 encePairwiseOnDemand]: 378/389 looper letters, 408 selfloop transitions, 225 changer transitions 0/655 dead transitions. [2023-11-06 21:55:03,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 655 transitions, 8869 flow [2023-11-06 21:55:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:55:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 21:55:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3091 transitions. [2023-11-06 21:55:03,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973007712082262 [2023-11-06 21:55:03,010 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3091 transitions. [2023-11-06 21:55:03,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3091 transitions. [2023-11-06 21:55:03,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:03,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3091 transitions. [2023-11-06 21:55:03,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.55) internal successors, (3091), 20 states have internal predecessors, (3091), 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 21:55:03,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 389.0) internal successors, (8169), 21 states have internal predecessors, (8169), 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 21:55:03,026 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 389.0) internal successors, (8169), 21 states have internal predecessors, (8169), 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 21:55:03,026 INFO L175 Difference]: Start difference. First operand has 189 places, 434 transitions, 5082 flow. Second operand 20 states and 3091 transitions. [2023-11-06 21:55:03,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 655 transitions, 8869 flow [2023-11-06 21:55:03,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 655 transitions, 8542 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-06 21:55:03,251 INFO L231 Difference]: Finished difference. Result has 203 places, 486 transitions, 6130 flow [2023-11-06 21:55:03,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=4785, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6130, PETRI_PLACES=203, PETRI_TRANSITIONS=486} [2023-11-06 21:55:03,252 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 172 predicate places. [2023-11-06 21:55:03,252 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 486 transitions, 6130 flow [2023-11-06 21:55:03,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 149.15) internal successors, (2983), 20 states have internal predecessors, (2983), 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 21:55:03,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:03,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:03,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:03,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:03,453 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:03,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash -917638155, now seen corresponding path program 16 times [2023-11-06 21:55:03,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:03,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27691308] [2023-11-06 21:55:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:03,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:03,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27691308] [2023-11-06 21:55:03,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27691308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986434590] [2023-11-06 21:55:03,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:55:03,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:03,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:03,641 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:03,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:55:03,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:55:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:03,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:55:03,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:03,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:04,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986434590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:04,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:04,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-06 21:55:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259358254] [2023-11-06 21:55:04,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:04,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:55:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:55:04,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:55:04,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 389 [2023-11-06 21:55:04,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 486 transitions, 6130 flow. Second operand has 20 states, 20 states have (on average 149.3) internal successors, (2986), 20 states have internal predecessors, (2986), 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 21:55:04,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:04,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 389 [2023-11-06 21:55:04,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:06,199 INFO L124 PetriNetUnfolderBase]: 2253/3278 cut-off events. [2023-11-06 21:55:06,199 INFO L125 PetriNetUnfolderBase]: For 48172/48176 co-relation queries the response was YES. [2023-11-06 21:55:06,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24245 conditions, 3278 events. 2253/3278 cut-off events. For 48172/48176 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14463 event pairs, 465 based on Foata normal form. 28/3283 useless extension candidates. Maximal degree in co-relation 24184. Up to 2284 conditions per place. [2023-11-06 21:55:06,238 INFO L140 encePairwiseOnDemand]: 378/389 looper letters, 372 selfloop transitions, 214 changer transitions 0/608 dead transitions. [2023-11-06 21:55:06,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 608 transitions, 8649 flow [2023-11-06 21:55:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:55:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 21:55:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2303 transitions. [2023-11-06 21:55:06,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946872322193659 [2023-11-06 21:55:06,243 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2303 transitions. [2023-11-06 21:55:06,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2303 transitions. [2023-11-06 21:55:06,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:06,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2303 transitions. [2023-11-06 21:55:06,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 153.53333333333333) internal successors, (2303), 15 states have internal predecessors, (2303), 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 21:55:06,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 389.0) internal successors, (6224), 16 states have internal predecessors, (6224), 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 21:55:06,255 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 389.0) internal successors, (6224), 16 states have internal predecessors, (6224), 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 21:55:06,255 INFO L175 Difference]: Start difference. First operand has 203 places, 486 transitions, 6130 flow. Second operand 15 states and 2303 transitions. [2023-11-06 21:55:06,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 608 transitions, 8649 flow [2023-11-06 21:55:06,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 608 transitions, 8192 flow, removed 125 selfloop flow, removed 8 redundant places. [2023-11-06 21:55:06,492 INFO L231 Difference]: Finished difference. Result has 211 places, 515 transitions, 6634 flow [2023-11-06 21:55:06,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6634, PETRI_PLACES=211, PETRI_TRANSITIONS=515} [2023-11-06 21:55:06,493 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 180 predicate places. [2023-11-06 21:55:06,493 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 515 transitions, 6634 flow [2023-11-06 21:55:06,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 149.3) internal successors, (2986), 20 states have internal predecessors, (2986), 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 21:55:06,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:06,493 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:06,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:06,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 21:55:06,694 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:06,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1223463309, now seen corresponding path program 17 times [2023-11-06 21:55:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:06,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832406610] [2023-11-06 21:55:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:06,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:55:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832406610] [2023-11-06 21:55:06,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832406610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300528454] [2023-11-06 21:55:06,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:55:06,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:06,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:06,896 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:06,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:55:07,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:07,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:07,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:55:07,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:07,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300528454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:07,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:07,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2023-11-06 21:55:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827657441] [2023-11-06 21:55:07,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:07,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:55:07,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:55:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:55:08,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 389 [2023-11-06 21:55:08,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 515 transitions, 6634 flow. Second operand has 21 states, 21 states have (on average 144.57142857142858) internal successors, (3036), 21 states have internal predecessors, (3036), 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 21:55:08,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:08,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 389 [2023-11-06 21:55:08,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:12,606 INFO L124 PetriNetUnfolderBase]: 3756/5455 cut-off events. [2023-11-06 21:55:12,607 INFO L125 PetriNetUnfolderBase]: For 81289/81289 co-relation queries the response was YES. [2023-11-06 21:55:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42757 conditions, 5455 events. 3756/5455 cut-off events. For 81289/81289 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26012 event pairs, 139 based on Foata normal form. 26/5461 useless extension candidates. Maximal degree in co-relation 42694. Up to 2745 conditions per place. [2023-11-06 21:55:12,693 INFO L140 encePairwiseOnDemand]: 375/389 looper letters, 499 selfloop transitions, 635 changer transitions 0/1134 dead transitions. [2023-11-06 21:55:12,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1134 transitions, 16365 flow [2023-11-06 21:55:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-06 21:55:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-06 21:55:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 12040 transitions. [2023-11-06 21:55:12,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821130470659177 [2023-11-06 21:55:12,707 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 12040 transitions. [2023-11-06 21:55:12,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 12040 transitions. [2023-11-06 21:55:12,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:12,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 12040 transitions. [2023-11-06 21:55:12,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 148.64197530864197) internal successors, (12040), 81 states have internal predecessors, (12040), 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 21:55:12,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 389.0) internal successors, (31898), 82 states have internal predecessors, (31898), 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 21:55:12,761 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 389.0) internal successors, (31898), 82 states have internal predecessors, (31898), 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 21:55:12,762 INFO L175 Difference]: Start difference. First operand has 211 places, 515 transitions, 6634 flow. Second operand 81 states and 12040 transitions. [2023-11-06 21:55:12,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1134 transitions, 16365 flow [2023-11-06 21:55:13,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1134 transitions, 16062 flow, removed 78 selfloop flow, removed 9 redundant places. [2023-11-06 21:55:13,387 INFO L231 Difference]: Finished difference. Result has 297 places, 805 transitions, 12542 flow [2023-11-06 21:55:13,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=12542, PETRI_PLACES=297, PETRI_TRANSITIONS=805} [2023-11-06 21:55:13,389 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 266 predicate places. [2023-11-06 21:55:13,389 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 805 transitions, 12542 flow [2023-11-06 21:55:13,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 144.57142857142858) internal successors, (3036), 21 states have internal predecessors, (3036), 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 21:55:13,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:13,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:13,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:13,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:13,590 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:13,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1388992354, now seen corresponding path program 2 times [2023-11-06 21:55:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751858298] [2023-11-06 21:55:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:55:15,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:15,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751858298] [2023-11-06 21:55:15,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751858298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:15,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561678109] [2023-11-06 21:55:15,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:15,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:15,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:15,834 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:15,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:55:16,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:16,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:16,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 21:55:16,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:16,510 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 15 treesize of output 1 [2023-11-06 21:55:16,615 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 8 treesize of output 1 [2023-11-06 21:55:16,757 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 8 treesize of output 1 [2023-11-06 21:55:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:17,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:17,319 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:55:17,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 35 [2023-11-06 21:55:17,809 INFO L322 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-11-06 21:55:17,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2023-11-06 21:55:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:17,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:20,129 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:20,130 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 80 [2023-11-06 21:55:20,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:20,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2654198 treesize of output 2326590 [2023-11-06 21:55:20,891 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:20,891 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 2262 treesize of output 1886 [2023-11-06 21:55:21,027 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:21,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1878 treesize of output 1714 [2023-11-06 21:55:21,160 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:21,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1654 treesize of output 1266 [2023-11-06 21:56:07,579 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:07,789 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:07,828 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,025 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,067 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:11,095 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,123 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:11,143 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,224 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,440 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,496 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,530 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:11,542 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-06 21:56:11,568 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:11,599 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-06 21:56:11,737 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:11,976 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-06 21:56:12,032 WARN L667 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-11-06 21:56:12,083 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-06 21:56:12,150 WARN L667 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-11-06 21:56:12,194 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-06 21:56:12,347 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:12,408 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:12,441 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:12,531 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:12,547 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:12,558 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:12,595 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:12,611 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:12,626 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:12,685 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:13,108 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:13,150 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:13,492 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:14,185 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:14,242 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:14,272 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:14,307 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-06 21:56:16,872 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-06 21:56:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:56:31,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561678109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:31,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:31,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 49 [2023-11-06 21:56:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052866641] [2023-11-06 21:56:31,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 21:56:31,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 21:56:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2326, Unknown=40, NotChecked=0, Total=2550 [2023-11-06 21:56:39,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 389 [2023-11-06 21:56:39,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 805 transitions, 12542 flow. Second operand has 51 states, 51 states have (on average 93.62745098039215) internal successors, (4775), 51 states have internal predecessors, (4775), 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 21:56:39,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:39,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 389 [2023-11-06 21:56:39,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:45,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:56:47,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:57:05,358 INFO L124 PetriNetUnfolderBase]: 6021/8769 cut-off events. [2023-11-06 21:57:05,358 INFO L125 PetriNetUnfolderBase]: For 213465/213465 co-relation queries the response was YES. [2023-11-06 21:57:05,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79427 conditions, 8769 events. 6021/8769 cut-off events. For 213465/213465 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 45962 event pairs, 284 based on Foata normal form. 4/8747 useless extension candidates. Maximal degree in co-relation 79349. Up to 6351 conditions per place. [2023-11-06 21:57:05,559 INFO L140 encePairwiseOnDemand]: 373/389 looper letters, 1039 selfloop transitions, 747 changer transitions 14/1800 dead transitions. [2023-11-06 21:57:05,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1800 transitions, 30711 flow [2023-11-06 21:57:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-06 21:57:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-06 21:57:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 7014 transitions. [2023-11-06 21:57:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25395561026829355 [2023-11-06 21:57:05,571 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 7014 transitions. [2023-11-06 21:57:05,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 7014 transitions. [2023-11-06 21:57:05,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:05,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 7014 transitions. [2023-11-06 21:57:05,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 98.78873239436619) internal successors, (7014), 71 states have internal predecessors, (7014), 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 21:57:05,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 389.0) internal successors, (28008), 72 states have internal predecessors, (28008), 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 21:57:05,615 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 389.0) internal successors, (28008), 72 states have internal predecessors, (28008), 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 21:57:05,615 INFO L175 Difference]: Start difference. First operand has 297 places, 805 transitions, 12542 flow. Second operand 71 states and 7014 transitions. [2023-11-06 21:57:05,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1800 transitions, 30711 flow [2023-11-06 21:57:07,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1800 transitions, 28679 flow, removed 735 selfloop flow, removed 13 redundant places. [2023-11-06 21:57:07,812 INFO L231 Difference]: Finished difference. Result has 380 places, 1445 transitions, 24588 flow [2023-11-06 21:57:07,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=11354, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=24588, PETRI_PLACES=380, PETRI_TRANSITIONS=1445} [2023-11-06 21:57:07,814 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 349 predicate places. [2023-11-06 21:57:07,814 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1445 transitions, 24588 flow [2023-11-06 21:57:07,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 93.62745098039215) internal successors, (4775), 51 states have internal predecessors, (4775), 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 21:57:07,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:07,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:07,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 21:57:08,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:57:08,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1473113744, now seen corresponding path program 3 times [2023-11-06 21:57:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788775621] [2023-11-06 21:57:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:57:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788775621] [2023-11-06 21:57:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788775621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098874197] [2023-11-06 21:57:10,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:57:10,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:10,349 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:10,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3603ffe-d4da-41c5-ad40-44f2af590059/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:57:10,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:57:10,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:10,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 21:57:10,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:11,689 INFO L322 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-11-06 21:57:11,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2023-11-06 21:57:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:57:11,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:12,761 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:12,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 342