./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.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_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/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_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/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_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:17:28,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:17:28,554 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:17:28,560 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:17:28,561 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:17:28,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:17:28,588 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:17:28,589 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:17:28,590 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:17:28,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:17:28,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:17:28,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:17:28,593 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:17:28,594 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:17:28,594 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:17:28,595 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:17:28,596 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:17:28,596 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:17:28,597 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:17:28,598 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:17:28,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:17:28,599 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:17:28,600 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:17:28,600 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:17:28,601 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:17:28,601 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:17:28,602 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:17:28,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:17:28,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:28,603 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:17:28,604 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:17:28,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:17:28,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:17:28,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:17:28,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:17:28,607 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:17:28,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:17:28,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:17:28,608 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:17:28,609 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_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2023-11-06 22:17:28,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:17:28,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:17:28,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:17:28,875 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:17:28,876 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:17:28,877 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-06 22:17:32,117 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:17:32,372 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:17:32,373 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-06 22:17:32,385 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/data/1d94a3348/be3b81aae7e143288e0f79ec55c8a885/FLAGf05c5a90b [2023-11-06 22:17:32,404 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/data/1d94a3348/be3b81aae7e143288e0f79ec55c8a885 [2023-11-06 22:17:32,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:17:32,409 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:17:32,410 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:32,410 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:17:32,416 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:17:32,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3052e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32, skipping insertion in model container [2023-11-06 22:17:32,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,451 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:17:32,698 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_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-11-06 22:17:32,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:32,732 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:17:32,775 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_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-11-06 22:17:32,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:32,797 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:17:32,797 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:17:32,805 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:17:32,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32 WrapperNode [2023-11-06 22:17:32,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:32,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:32,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:17:32,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:17:32,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,839 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,887 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 197 [2023-11-06 22:17:32,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:32,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:17:32,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:17:32,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:17:32,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,922 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,964 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:17:32,969 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:17:32,969 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:17:32,969 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:17:32,970 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:32,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:33,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:17:33,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:17:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:17:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:17:33,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:17:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:17:33,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:17:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:17:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:17:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:17:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:17:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:17:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:17:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:17:33,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:17:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:17:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:17:33,063 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:17:33,198 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:17:33,200 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:17:33,674 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:17:33,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:17:33,766 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:17:33,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:33 BoogieIcfgContainer [2023-11-06 22:17:33,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:17:33,772 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:17:33,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:17:33,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:17:33,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:17:32" (1/3) ... [2023-11-06 22:17:33,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8cd03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:33, skipping insertion in model container [2023-11-06 22:17:33,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (2/3) ... [2023-11-06 22:17:33,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8cd03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:33, skipping insertion in model container [2023-11-06 22:17:33,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:33" (3/3) ... [2023-11-06 22:17:33,781 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-11-06 22:17:33,810 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:17:33,820 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:17:33,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:17:33,821 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:17:33,886 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:17:33,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 192 transitions, 398 flow [2023-11-06 22:17:34,015 INFO L124 PetriNetUnfolderBase]: 15/190 cut-off events. [2023-11-06 22:17:34,015 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:34,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 190 events. 15/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 108 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 155. Up to 2 conditions per place. [2023-11-06 22:17:34,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 192 transitions, 398 flow [2023-11-06 22:17:34,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 181 transitions, 374 flow [2023-11-06 22:17:34,040 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:17:34,056 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 181 transitions, 374 flow [2023-11-06 22:17:34,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 181 transitions, 374 flow [2023-11-06 22:17:34,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 181 transitions, 374 flow [2023-11-06 22:17:34,144 INFO L124 PetriNetUnfolderBase]: 15/181 cut-off events. [2023-11-06 22:17:34,145 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:34,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 15/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 155. Up to 2 conditions per place. [2023-11-06 22:17:34,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-11-06 22:17:40,951 INFO L134 LiptonReduction]: Checked pairs total: 1315 [2023-11-06 22:17:40,951 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-11-06 22:17:40,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:17:40,975 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;@44fcdc0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:17:40,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:17:40,982 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:17:40,983 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2023-11-06 22:17:40,983 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:40,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:40,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:40,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:40,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash -83094554, now seen corresponding path program 1 times [2023-11-06 22:17:41,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:41,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123634290] [2023-11-06 22:17:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:41,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:41,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:41,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123634290] [2023-11-06 22:17:41,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123634290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:41,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:41,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127925203] [2023-11-06 22:17:41,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:41,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:17:41,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 385 [2023-11-06 22:17:41,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:41,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:41,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 385 [2023-11-06 22:17:41,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:41,855 INFO L124 PetriNetUnfolderBase]: 167/270 cut-off events. [2023-11-06 22:17:41,855 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:17:41,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 270 events. 167/270 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 930 event pairs, 37 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 503. Up to 180 conditions per place. [2023-11-06 22:17:41,860 INFO L140 encePairwiseOnDemand]: 380/385 looper letters, 29 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2023-11-06 22:17:41,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 149 flow [2023-11-06 22:17:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:17:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2023-11-06 22:17:41,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2023-11-06 22:17:41,884 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2023-11-06 22:17:41,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2023-11-06 22:17:41,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:41,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2023-11-06 22:17:41,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:41,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:41,909 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:41,911 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 4 states and 710 transitions. [2023-11-06 22:17:41,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 149 flow [2023-11-06 22:17:41,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:17:41,918 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 71 flow [2023-11-06 22:17:41,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2023-11-06 22:17:41,924 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2023-11-06 22:17:41,924 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 71 flow [2023-11-06 22:17:41,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:41,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:41,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:41,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:17:41,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:41,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash -351948129, now seen corresponding path program 1 times [2023-11-06 22:17:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:41,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717575833] [2023-11-06 22:17:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:42,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717575833] [2023-11-06 22:17:42,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717575833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:42,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:42,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666402811] [2023-11-06 22:17:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:42,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:42,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:42,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 385 [2023-11-06 22:17:42,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 385 [2023-11-06 22:17:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:42,351 INFO L124 PetriNetUnfolderBase]: 156/260 cut-off events. [2023-11-06 22:17:42,352 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-06 22:17:42,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 260 events. 156/260 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 864 event pairs, 91 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 303. Up to 254 conditions per place. [2023-11-06 22:17:42,359 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 23 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-11-06 22:17:42,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 123 flow [2023-11-06 22:17:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:17:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 510 transitions. [2023-11-06 22:17:42,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-11-06 22:17:42,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 510 transitions. [2023-11-06 22:17:42,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 510 transitions. [2023-11-06 22:17:42,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:42,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 510 transitions. [2023-11-06 22:17:42,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,377 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 71 flow. Second operand 3 states and 510 transitions. [2023-11-06 22:17:42,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 123 flow [2023-11-06 22:17:42,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:17:42,380 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 78 flow [2023-11-06 22:17:42,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2023-11-06 22:17:42,381 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2023-11-06 22:17:42,387 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 78 flow [2023-11-06 22:17:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:42,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:42,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:17:42,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:42,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:42,390 INFO L85 PathProgramCache]: Analyzing trace with hash 962050712, now seen corresponding path program 1 times [2023-11-06 22:17:42,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:42,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967388822] [2023-11-06 22:17:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:42,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:17:42,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:42,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967388822] [2023-11-06 22:17:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967388822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:42,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:42,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:17:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938882411] [2023-11-06 22:17:42,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:42,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:42,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 385 [2023-11-06 22:17:42,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:42,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 385 [2023-11-06 22:17:42,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:42,699 INFO L124 PetriNetUnfolderBase]: 223/374 cut-off events. [2023-11-06 22:17:42,699 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-06 22:17:42,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 374 events. 223/374 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1361 event pairs, 78 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 817. Up to 187 conditions per place. [2023-11-06 22:17:42,703 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 36 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2023-11-06 22:17:42,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 200 flow [2023-11-06 22:17:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:17:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-06 22:17:42,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753246753246753 [2023-11-06 22:17:42,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-06 22:17:42,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-06 22:17:42,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:42,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-06 22:17:42,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,714 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 78 flow. Second operand 3 states and 549 transitions. [2023-11-06 22:17:42,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 200 flow [2023-11-06 22:17:42,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 196 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:17:42,718 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 86 flow [2023-11-06 22:17:42,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=74, 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=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-11-06 22:17:42,721 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-06 22:17:42,724 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 86 flow [2023-11-06 22:17:42,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:42,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:42,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:17:42,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:42,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash -65186652, now seen corresponding path program 1 times [2023-11-06 22:17:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:42,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132883874] [2023-11-06 22:17:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:42,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132883874] [2023-11-06 22:17:42,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132883874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:42,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:42,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:17:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192992845] [2023-11-06 22:17:42,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:42,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:42,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 385 [2023-11-06 22:17:42,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:42,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 385 [2023-11-06 22:17:42,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:43,034 INFO L124 PetriNetUnfolderBase]: 213/369 cut-off events. [2023-11-06 22:17:43,035 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-06 22:17:43,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 369 events. 213/369 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1371 event pairs, 75 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 858. Up to 292 conditions per place. [2023-11-06 22:17:43,039 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 30 selfloop transitions, 2 changer transitions 5/38 dead transitions. [2023-11-06 22:17:43,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 189 flow [2023-11-06 22:17:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:17:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-11-06 22:17:43,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470995670995671 [2023-11-06 22:17:43,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-11-06 22:17:43,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-11-06 22:17:43,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:43,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-11-06 22:17:43,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,053 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 86 flow. Second operand 3 states and 544 transitions. [2023-11-06 22:17:43,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 189 flow [2023-11-06 22:17:43,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:17:43,056 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 96 flow [2023-11-06 22:17:43,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-06 22:17:43,059 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-11-06 22:17:43,059 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 96 flow [2023-11-06 22:17:43,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:43,060 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 22:17:43,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:17:43,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:43,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash 448728940, now seen corresponding path program 1 times [2023-11-06 22:17:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:43,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488619339] [2023-11-06 22:17:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:43,268 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 22:17:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488619339] [2023-11-06 22:17:43,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488619339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:43,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:43,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:43,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023523397] [2023-11-06 22:17:43,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:43,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:43,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:43,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:43,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:17:43,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 385 [2023-11-06 22:17:43,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:43,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 385 [2023-11-06 22:17:43,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:43,502 INFO L124 PetriNetUnfolderBase]: 247/448 cut-off events. [2023-11-06 22:17:43,502 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-06 22:17:43,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 448 events. 247/448 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1809 event pairs, 174 based on Foata normal form. 12/459 useless extension candidates. Maximal degree in co-relation 914. Up to 366 conditions per place. [2023-11-06 22:17:43,506 INFO L140 encePairwiseOnDemand]: 381/385 looper letters, 26 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2023-11-06 22:17:43,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 236 flow [2023-11-06 22:17:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:17:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 678 transitions. [2023-11-06 22:17:43,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025974025974024 [2023-11-06 22:17:43,510 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 678 transitions. [2023-11-06 22:17:43,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 678 transitions. [2023-11-06 22:17:43,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:43,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 678 transitions. [2023-11-06 22:17:43,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,520 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,520 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 96 flow. Second operand 4 states and 678 transitions. [2023-11-06 22:17:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 236 flow [2023-11-06 22:17:43,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:17:43,527 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 108 flow [2023-11-06 22:17:43,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-11-06 22:17:43,530 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2023-11-06 22:17:43,530 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 108 flow [2023-11-06 22:17:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:43,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:43,531 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 22:17:43,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:17:43,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:43,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1319759342, now seen corresponding path program 1 times [2023-11-06 22:17:43,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:43,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129340595] [2023-11-06 22:17:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:43,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:45,129 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 22:17:45,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:45,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129340595] [2023-11-06 22:17:45,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129340595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:45,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590339558] [2023-11-06 22:17:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:45,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:45,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:45,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:45,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:17:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:45,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:17:45,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:45,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-06 22:17:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:45,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-06 22:17:45,546 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 23 treesize of output 1 [2023-11-06 22:17:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:45,638 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-06 22:17:45,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 22:17:45,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:17:45,734 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 22:17:45,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:17:46,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-11-06 22:17:46,274 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 22:17:46,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:47,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:47,669 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 62 treesize of output 51 [2023-11-06 22:17:47,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3350 treesize of output 3222 [2023-11-06 22:17:47,775 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:47,776 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 798 treesize of output 623 [2023-11-06 22:17:47,830 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:47,830 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 606 treesize of output 551 [2023-11-06 22:17:47,880 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:47,880 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 534 treesize of output 455 [2023-11-06 22:17:48,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:48,705 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 123 treesize of output 87 [2023-11-06 22:17:48,729 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:48,730 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 2096 treesize of output 2024 [2023-11-06 22:17:48,889 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:48,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1176 treesize of output 1048 [2023-11-06 22:17:48,977 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:48,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1008 treesize of output 808 [2023-11-06 22:17:49,061 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:49,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 768 treesize of output 676 [2023-11-06 22:17:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:53,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590339558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:53,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:53,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 29 [2023-11-06 22:17:53,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412925766] [2023-11-06 22:17:53,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:53,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:17:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:17:53,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=762, Unknown=9, NotChecked=0, Total=930 [2023-11-06 22:17:56,981 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 22:17:58,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 385 [2023-11-06 22:17:58,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 108 flow. Second operand has 31 states, 31 states have (on average 87.96774193548387) internal successors, (2727), 31 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:58,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:58,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 385 [2023-11-06 22:17:58,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:58,400 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~start~0 1))) (let ((.cse5 (< c_~end~0 0)) (.cse2 (< c_~start~0 0)) (.cse12 (< c_~n~0 (+ c_~end~0 1))) (.cse4 (< c_~n~0 .cse3)) (.cse1 (+ (* c_~start~0 4) c_~queue~0.offset)) (.cse0 (not (= (mod c_~ok~0 256) 0))) (.cse9 (+ (* c_~end~0 4) c_~queue~0.offset))) (and (<= c_~v_old~0 c_~new~0) (or (= (mod |c_thread2Thread1of1ForFork0_~cond~0#1| 256) 0) (and .cse0 (<= c_~v_old~0 (select (select |c_#memory_int| c_~queue~0.base) .cse1))) .cse2 (< c_~end~0 .cse3) .cse4) (= c_~ok~0 1) (or .cse5 (and (forall ((v_ArrVal_106 (Array Int Int)) (~A~0.offset Int) (v_ArrVal_105 (Array Int Int)) (~i~0 Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_105))) (let ((.cse10 (store .cse6 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106))) (let ((.cse8 (select .cse10 c_~queue~0.base)) (.cse7 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select (select .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse7) (+ (select .cse8 .cse1) 1)) (not (= (select .cse8 .cse9) (select (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse7)))))))) (or .cse0 (forall ((v_ArrVal_106 (Array Int Int)) (~A~0.offset Int) (v_ArrVal_105 (Array Int Int)) (~i~0 Int)) (not (let ((.cse11 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_105) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106))) (= (select (select .cse11 c_~queue~0.base) .cse9) (select (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset)))))))) .cse2 .cse12 .cse4) (or .cse5 .cse2 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse12 .cse4 (let ((.cse13 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_127| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_127|) 0))))) (and (or .cse13 (= c_~start~0 c_~end~0)) (or .cse0 .cse13) (not (= (select |c_#valid| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0))))) (or .cse5 .cse2 .cse12 .cse4 (and (forall ((v_ArrVal_106 (Array Int Int)) (~A~0.offset Int) (v_ArrVal_105 (Array Int Int)) (~i~0 Int) (v_ArrVal_104 (Array Int Int))) (let ((.cse17 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_104) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_105))) (let ((.cse14 (store .cse17 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106))) (let ((.cse15 (+ (* ~i~0 4) ~A~0.offset)) (.cse16 (select .cse14 c_~queue~0.base))) (or (not (= (select (select .cse14 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse15) (select .cse16 .cse9))) (< (select (select .cse17 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse15) (+ (select .cse16 .cse1) 1))))))) (or .cse0 (forall ((v_ArrVal_106 (Array Int Int)) (~A~0.offset Int) (v_ArrVal_105 (Array Int Int)) (~i~0 Int) (v_ArrVal_104 (Array Int Int))) (not (let ((.cse18 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_104) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_105) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106))) (= (select (select .cse18 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset)) (select (select .cse18 c_~queue~0.base) .cse9))))))))))) is different from false [2023-11-06 22:18:04,886 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 [0] [2023-11-06 22:18:11,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:13,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:16,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:17,229 INFO L124 PetriNetUnfolderBase]: 1221/2081 cut-off events. [2023-11-06 22:18:17,229 INFO L125 PetriNetUnfolderBase]: For 538/538 co-relation queries the response was YES. [2023-11-06 22:18:17,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5262 conditions, 2081 events. 1221/2081 cut-off events. For 538/538 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10888 event pairs, 149 based on Foata normal form. 23/2104 useless extension candidates. Maximal degree in co-relation 5244. Up to 512 conditions per place. [2023-11-06 22:18:17,248 INFO L140 encePairwiseOnDemand]: 369/385 looper letters, 197 selfloop transitions, 94 changer transitions 73/364 dead transitions. [2023-11-06 22:18:17,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 364 transitions, 1886 flow [2023-11-06 22:18:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:18:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-06 22:18:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4381 transitions. [2023-11-06 22:18:17,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24211108040895274 [2023-11-06 22:18:17,274 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4381 transitions. [2023-11-06 22:18:17,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4381 transitions. [2023-11-06 22:18:17,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:17,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4381 transitions. [2023-11-06 22:18:17,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 93.2127659574468) internal successors, (4381), 47 states have internal predecessors, (4381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:17,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 385.0) internal successors, (18480), 48 states have internal predecessors, (18480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:17,329 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 385.0) internal successors, (18480), 48 states have internal predecessors, (18480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:17,329 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 108 flow. Second operand 47 states and 4381 transitions. [2023-11-06 22:18:17,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 364 transitions, 1886 flow [2023-11-06 22:18:17,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 364 transitions, 1870 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:17,342 INFO L231 Difference]: Finished difference. Result has 101 places, 130 transitions, 867 flow [2023-11-06 22:18:17,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=867, PETRI_PLACES=101, PETRI_TRANSITIONS=130} [2023-11-06 22:18:17,345 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2023-11-06 22:18:17,349 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 130 transitions, 867 flow [2023-11-06 22:18:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 87.96774193548387) internal successors, (2727), 31 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:17,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:17,351 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 22:18:17,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:17,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:17,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:17,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2119967582, now seen corresponding path program 2 times [2023-11-06 22:18:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:17,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433067921] [2023-11-06 22:18:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:19,405 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 22:18:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:19,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433067921] [2023-11-06 22:18:19,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433067921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:19,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541001427] [2023-11-06 22:18:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:19,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:19,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:19,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:18:19,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:19,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:19,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:18:19,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:19,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:19,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:19,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:18:19,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:19,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:18:19,710 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 23 treesize of output 1 [2023-11-06 22:18:19,801 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:18:19,801 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:18:19,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 22:18:19,920 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 22:18:20,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:20,287 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-06 22:18:20,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2023-11-06 22:18:20,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 22:18:20,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:18:20,579 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 22:18:20,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:21,923 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:21,924 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 56 treesize of output 45 [2023-11-06 22:18:21,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:21,953 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 854 treesize of output 746 [2023-11-06 22:18:22,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:22,015 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 358 treesize of output 279 [2023-11-06 22:18:22,052 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:22,052 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 262 treesize of output 231 [2023-11-06 22:18:22,461 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:22,461 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 117 treesize of output 81 [2023-11-06 22:18:22,523 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:22,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7948 treesize of output 7098 [2023-11-06 22:18:22,672 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:22,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1076 treesize of output 876 [2023-11-06 22:18:22,757 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:22,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 836 treesize of output 756 [2023-11-06 22:18:22,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 202 [2023-11-06 22:18:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:33,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541001427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:33,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:33,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-11-06 22:18:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574324649] [2023-11-06 22:18:33,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:33,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:18:33,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:18:33,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=920, Unknown=4, NotChecked=0, Total=1122 [2023-11-06 22:18:36,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 385 [2023-11-06 22:18:36,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 130 transitions, 867 flow. Second operand has 34 states, 34 states have (on average 91.94117647058823) internal successors, (3126), 34 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:36,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:36,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 385 [2023-11-06 22:18:36,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:43,968 INFO L124 PetriNetUnfolderBase]: 1781/2991 cut-off events. [2023-11-06 22:18:43,969 INFO L125 PetriNetUnfolderBase]: For 14567/14567 co-relation queries the response was YES. [2023-11-06 22:18:43,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13369 conditions, 2991 events. 1781/2991 cut-off events. For 14567/14567 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16415 event pairs, 142 based on Foata normal form. 2/2993 useless extension candidates. Maximal degree in co-relation 13325. Up to 613 conditions per place. [2023-11-06 22:18:44,014 INFO L140 encePairwiseOnDemand]: 368/385 looper letters, 257 selfloop transitions, 150 changer transitions 32/439 dead transitions. [2023-11-06 22:18:44,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 439 transitions, 3853 flow [2023-11-06 22:18:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:18:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 22:18:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3951 transitions. [2023-11-06 22:18:44,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25030091859360154 [2023-11-06 22:18:44,035 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3951 transitions. [2023-11-06 22:18:44,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3951 transitions. [2023-11-06 22:18:44,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:44,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3951 transitions. [2023-11-06 22:18:44,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 96.36585365853658) internal successors, (3951), 41 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 385.0) internal successors, (16170), 42 states have internal predecessors, (16170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,086 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 385.0) internal successors, (16170), 42 states have internal predecessors, (16170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,086 INFO L175 Difference]: Start difference. First operand has 101 places, 130 transitions, 867 flow. Second operand 41 states and 3951 transitions. [2023-11-06 22:18:44,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 439 transitions, 3853 flow [2023-11-06 22:18:44,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 439 transitions, 3539 flow, removed 148 selfloop flow, removed 7 redundant places. [2023-11-06 22:18:44,248 INFO L231 Difference]: Finished difference. Result has 146 places, 237 transitions, 1937 flow [2023-11-06 22:18:44,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1937, PETRI_PLACES=146, PETRI_TRANSITIONS=237} [2023-11-06 22:18:44,249 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 121 predicate places. [2023-11-06 22:18:44,249 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 237 transitions, 1937 flow [2023-11-06 22:18:44,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 91.94117647058823) internal successors, (3126), 34 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:44,251 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] [2023-11-06 22:18:44,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:18:44,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:44,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:44,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash -260401448, now seen corresponding path program 3 times [2023-11-06 22:18:44,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:44,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776862861] [2023-11-06 22:18:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:46,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776862861] [2023-11-06 22:18:46,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776862861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:46,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375293164] [2023-11-06 22:18:46,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:46,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:46,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:46,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:18:46,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:18:46,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:46,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:18:46,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:47,344 INFO L322 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-06 22:18:47,344 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 42 treesize of output 10 [2023-11-06 22:18:47,393 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 22:18:47,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:47,822 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:47,822 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 74 treesize of output 121 [2023-11-06 22:18:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375293164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:48,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:48,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 26 [2023-11-06 22:18:48,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669171361] [2023-11-06 22:18:48,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:48,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:18:48,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:18:48,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:18:53,110 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 [0] [2023-11-06 22:18:55,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:55,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 385 [2023-11-06 22:18:55,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 237 transitions, 1937 flow. Second operand has 28 states, 28 states have (on average 118.35714285714286) internal successors, (3314), 28 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:55,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:55,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 385 [2023-11-06 22:18:55,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:58,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:19:01,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:19:03,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:19:05,824 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 [0] [2023-11-06 22:19:06,596 INFO L124 PetriNetUnfolderBase]: 2468/4115 cut-off events. [2023-11-06 22:19:06,596 INFO L125 PetriNetUnfolderBase]: For 30228/30228 co-relation queries the response was YES. [2023-11-06 22:19:06,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21601 conditions, 4115 events. 2468/4115 cut-off events. For 30228/30228 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23771 event pairs, 242 based on Foata normal form. 2/4117 useless extension candidates. Maximal degree in co-relation 21546. Up to 1309 conditions per place. [2023-11-06 22:19:06,654 INFO L140 encePairwiseOnDemand]: 369/385 looper letters, 283 selfloop transitions, 158 changer transitions 16/457 dead transitions. [2023-11-06 22:19:06,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 457 transitions, 4716 flow [2023-11-06 22:19:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:19:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:19:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3186 transitions. [2023-11-06 22:19:06,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3182817182817183 [2023-11-06 22:19:06,662 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3186 transitions. [2023-11-06 22:19:06,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3186 transitions. [2023-11-06 22:19:06,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:06,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3186 transitions. [2023-11-06 22:19:06,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 122.53846153846153) internal successors, (3186), 26 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:06,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 385.0) internal successors, (10395), 27 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:06,692 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 385.0) internal successors, (10395), 27 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:06,693 INFO L175 Difference]: Start difference. First operand has 146 places, 237 transitions, 1937 flow. Second operand 26 states and 3186 transitions. [2023-11-06 22:19:06,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 457 transitions, 4716 flow [2023-11-06 22:19:06,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 457 transitions, 4578 flow, removed 62 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:06,895 INFO L231 Difference]: Finished difference. Result has 175 places, 312 transitions, 3135 flow [2023-11-06 22:19:06,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3135, PETRI_PLACES=175, PETRI_TRANSITIONS=312} [2023-11-06 22:19:06,899 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 150 predicate places. [2023-11-06 22:19:06,899 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 312 transitions, 3135 flow [2023-11-06 22:19:06,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 118.35714285714286) internal successors, (3314), 28 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:06,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:06,902 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] [2023-11-06 22:19:06,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:19:07,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:07,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:07,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -490813830, now seen corresponding path program 4 times [2023-11-06 22:19:07,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:07,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625456453] [2023-11-06 22:19:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:07,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:09,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:09,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625456453] [2023-11-06 22:19:09,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625456453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:09,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316699442] [2023-11-06 22:19:09,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:09,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:09,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:09,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:09,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:19:09,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:09,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:09,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:19:09,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:09,791 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-06 22:19:09,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2023-11-06 22:19:09,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 22:19:09,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-06 22:19:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:19:09,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:10,532 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:10,533 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 90 treesize of output 131 [2023-11-06 22:19:10,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-11-06 22:19:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:19:11,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316699442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:11,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:11,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 29 [2023-11-06 22:19:11,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477999679] [2023-11-06 22:19:11,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:11,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:19:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:19:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:19:15,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 385 [2023-11-06 22:19:15,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 312 transitions, 3135 flow. Second operand has 31 states, 31 states have (on average 124.09677419354838) internal successors, (3847), 31 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:15,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:15,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 385 [2023-11-06 22:19:15,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:18,993 INFO L124 PetriNetUnfolderBase]: 2929/4874 cut-off events. [2023-11-06 22:19:18,993 INFO L125 PetriNetUnfolderBase]: For 52731/52731 co-relation queries the response was YES. [2023-11-06 22:19:19,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29898 conditions, 4874 events. 2929/4874 cut-off events. For 52731/52731 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29070 event pairs, 138 based on Foata normal form. 2/4876 useless extension candidates. Maximal degree in co-relation 29834. Up to 1403 conditions per place. [2023-11-06 22:19:19,065 INFO L140 encePairwiseOnDemand]: 369/385 looper letters, 298 selfloop transitions, 173 changer transitions 16/487 dead transitions. [2023-11-06 22:19:19,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 487 transitions, 5895 flow [2023-11-06 22:19:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:19:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:19:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3083 transitions. [2023-11-06 22:19:19,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33365800865800865 [2023-11-06 22:19:19,175 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3083 transitions. [2023-11-06 22:19:19,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3083 transitions. [2023-11-06 22:19:19,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:19,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3083 transitions. [2023-11-06 22:19:19,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 128.45833333333334) internal successors, (3083), 24 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:19,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 385.0) internal successors, (9625), 25 states have internal predecessors, (9625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:19,198 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 385.0) internal successors, (9625), 25 states have internal predecessors, (9625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:19,198 INFO L175 Difference]: Start difference. First operand has 175 places, 312 transitions, 3135 flow. Second operand 24 states and 3083 transitions. [2023-11-06 22:19:19,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 487 transitions, 5895 flow [2023-11-06 22:19:19,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 487 transitions, 5754 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-11-06 22:19:19,521 INFO L231 Difference]: Finished difference. Result has 201 places, 352 transitions, 4155 flow [2023-11-06 22:19:19,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4155, PETRI_PLACES=201, PETRI_TRANSITIONS=352} [2023-11-06 22:19:19,522 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 176 predicate places. [2023-11-06 22:19:19,522 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 352 transitions, 4155 flow [2023-11-06 22:19:19,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 124.09677419354838) internal successors, (3847), 31 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:19,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:19,523 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] [2023-11-06 22:19:19,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:19,730 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:19,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 104888372, now seen corresponding path program 5 times [2023-11-06 22:19:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548202882] [2023-11-06 22:19:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:19:19,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:19,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548202882] [2023-11-06 22:19:19,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548202882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:19,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801007870] [2023-11-06 22:19:19,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:19,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:19,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:19,854 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:19,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:19:19,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:19:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:19,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:19:19,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:19:20,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:19:20,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801007870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:20,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:20,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-11-06 22:19:20,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473921721] [2023-11-06 22:19:20,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:20,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:19:20,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:19:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:19:20,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 385 [2023-11-06 22:19:20,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 352 transitions, 4155 flow. Second operand has 7 states, 7 states have (on average 176.0) internal successors, (1232), 7 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:20,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:20,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 385 [2023-11-06 22:19:20,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:21,878 INFO L124 PetriNetUnfolderBase]: 3809/6509 cut-off events. [2023-11-06 22:19:21,878 INFO L125 PetriNetUnfolderBase]: For 80016/80103 co-relation queries the response was YES. [2023-11-06 22:19:21,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41858 conditions, 6509 events. 3809/6509 cut-off events. For 80016/80103 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 41219 event pairs, 692 based on Foata normal form. 170/6602 useless extension candidates. Maximal degree in co-relation 41770. Up to 3128 conditions per place. [2023-11-06 22:19:21,983 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 341 selfloop transitions, 114 changer transitions 0/476 dead transitions. [2023-11-06 22:19:21,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 476 transitions, 6399 flow [2023-11-06 22:19:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:19:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:19:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-11-06 22:19:21,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766233766233766 [2023-11-06 22:19:21,986 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-11-06 22:19:21,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-11-06 22:19:21,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:21,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-11-06 22:19:21,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:21,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:21,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 385.0) internal successors, (1925), 5 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:21,990 INFO L175 Difference]: Start difference. First operand has 201 places, 352 transitions, 4155 flow. Second operand 4 states and 734 transitions. [2023-11-06 22:19:21,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 476 transitions, 6399 flow [2023-11-06 22:19:22,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 476 transitions, 6237 flow, removed 66 selfloop flow, removed 8 redundant places. [2023-11-06 22:19:22,597 INFO L231 Difference]: Finished difference. Result has 197 places, 401 transitions, 5054 flow [2023-11-06 22:19:22,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5054, PETRI_PLACES=197, PETRI_TRANSITIONS=401} [2023-11-06 22:19:22,599 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 172 predicate places. [2023-11-06 22:19:22,599 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 401 transitions, 5054 flow [2023-11-06 22:19:22,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.0) internal successors, (1232), 7 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:22,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:22,599 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:22,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:22,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:19:22,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:22,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash -14942684, now seen corresponding path program 6 times [2023-11-06 22:19:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:22,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143364575] [2023-11-06 22:19:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:22,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:25,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:25,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143364575] [2023-11-06 22:19:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143364575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127653279] [2023-11-06 22:19:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:25,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:25,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:25,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:25,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:19:25,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:19:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:25,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:19:25,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:25,772 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 22:19:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:19:25,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:19:26,278 INFO L322 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-06 22:19:26,279 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 34 treesize of output 10 [2023-11-06 22:19:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:26,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:27,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:27,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 74 [2023-11-06 22:19:27,106 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:27,107 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 2037 treesize of output 1957 [2023-11-06 22:19:27,161 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:27,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 470 treesize of output 456 [2023-11-06 22:19:27,220 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:27,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 421 treesize of output 353 [2023-11-06 22:19:27,267 INFO L322 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-06 22:19:27,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 155 treesize of output 141 [2023-11-06 22:19:30,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:19:30,522 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:19:30,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:19:30,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:19:30,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:30,607 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 28 treesize of output 24 [2023-11-06 22:19:30,647 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:30,647 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 30 treesize of output 26 [2023-11-06 22:19:30,685 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:19:30,685 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 41 treesize of output 1 [2023-11-06 22:19:30,890 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:19:30,891 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 11 treesize of output 7 [2023-11-06 22:19:30,908 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:30,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 52 treesize of output 41 [2023-11-06 22:19:30,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:30,914 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:30,923 INFO L322 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2023-11-06 22:19:30,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 186 treesize of output 138 [2023-11-06 22:19:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:19:31,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127653279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:31,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:31,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 32 [2023-11-06 22:19:31,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633432243] [2023-11-06 22:19:31,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:31,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:19:31,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:19:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=942, Unknown=8, NotChecked=0, Total=1122 [2023-11-06 22:19:35,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 385 [2023-11-06 22:19:35,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 401 transitions, 5054 flow. Second operand has 34 states, 34 states have (on average 95.02941176470588) internal successors, (3231), 34 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:35,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:35,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 385 [2023-11-06 22:19:35,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:41,177 INFO L124 PetriNetUnfolderBase]: 4473/7558 cut-off events. [2023-11-06 22:19:41,177 INFO L125 PetriNetUnfolderBase]: For 104255/104255 co-relation queries the response was YES. [2023-11-06 22:19:41,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50898 conditions, 7558 events. 4473/7558 cut-off events. For 104255/104255 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 47489 event pairs, 415 based on Foata normal form. 5/7563 useless extension candidates. Maximal degree in co-relation 46101. Up to 2288 conditions per place. [2023-11-06 22:19:41,275 INFO L140 encePairwiseOnDemand]: 369/385 looper letters, 270 selfloop transitions, 262 changer transitions 30/562 dead transitions. [2023-11-06 22:19:41,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 562 transitions, 7958 flow [2023-11-06 22:19:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:19:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:19:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2485 transitions. [2023-11-06 22:19:41,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2581818181818182 [2023-11-06 22:19:41,282 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2485 transitions. [2023-11-06 22:19:41,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2485 transitions. [2023-11-06 22:19:41,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:41,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2485 transitions. [2023-11-06 22:19:41,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 99.4) internal successors, (2485), 25 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 385.0) internal successors, (10010), 26 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,302 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 385.0) internal successors, (10010), 26 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,302 INFO L175 Difference]: Start difference. First operand has 197 places, 401 transitions, 5054 flow. Second operand 25 states and 2485 transitions. [2023-11-06 22:19:41,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 562 transitions, 7958 flow [2023-11-06 22:19:41,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 562 transitions, 7874 flow, removed 42 selfloop flow, removed 0 redundant places. [2023-11-06 22:19:41,903 INFO L231 Difference]: Finished difference. Result has 232 places, 458 transitions, 6682 flow [2023-11-06 22:19:41,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=5022, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6682, PETRI_PLACES=232, PETRI_TRANSITIONS=458} [2023-11-06 22:19:41,904 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 207 predicate places. [2023-11-06 22:19:41,904 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 458 transitions, 6682 flow [2023-11-06 22:19:41,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 95.02941176470588) internal successors, (3231), 34 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:41,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:41,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:42,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:19:42,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:42,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash -585669867, now seen corresponding path program 7 times [2023-11-06 22:19:42,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:42,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505734870] [2023-11-06 22:19:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:42,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:19:42,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505734870] [2023-11-06 22:19:42,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505734870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267515547] [2023-11-06 22:19:42,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:42,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:42,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:42,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:42,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:19:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:42,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:19:42,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:19:42,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:19:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267515547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:42,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:42,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-06 22:19:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006982130] [2023-11-06 22:19:42,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:43,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 385 [2023-11-06 22:19:43,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 458 transitions, 6682 flow. Second operand has 15 states, 15 states have (on average 152.46666666666667) internal successors, (2287), 15 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:43,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:43,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 385 [2023-11-06 22:19:43,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:45,664 INFO L124 PetriNetUnfolderBase]: 2808/5172 cut-off events. [2023-11-06 22:19:45,664 INFO L125 PetriNetUnfolderBase]: For 96770/96941 co-relation queries the response was YES. [2023-11-06 22:19:45,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37725 conditions, 5172 events. 2808/5172 cut-off events. For 96770/96941 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34728 event pairs, 903 based on Foata normal form. 246/5322 useless extension candidates. Maximal degree in co-relation 37623. Up to 2084 conditions per place. [2023-11-06 22:19:45,727 INFO L140 encePairwiseOnDemand]: 375/385 looper letters, 177 selfloop transitions, 13 changer transitions 379/580 dead transitions. [2023-11-06 22:19:45,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 580 transitions, 9773 flow [2023-11-06 22:19:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:19:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:19:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3100 transitions. [2023-11-06 22:19:45,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2023-11-06 22:19:45,735 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3100 transitions. [2023-11-06 22:19:45,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3100 transitions. [2023-11-06 22:19:45,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:45,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3100 transitions. [2023-11-06 22:19:45,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 155.0) internal successors, (3100), 20 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:45,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 385.0) internal successors, (8085), 21 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:45,869 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 385.0) internal successors, (8085), 21 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:45,869 INFO L175 Difference]: Start difference. First operand has 232 places, 458 transitions, 6682 flow. Second operand 20 states and 3100 transitions. [2023-11-06 22:19:45,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 580 transitions, 9773 flow [2023-11-06 22:19:46,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 580 transitions, 9079 flow, removed 173 selfloop flow, removed 19 redundant places. [2023-11-06 22:19:46,572 INFO L231 Difference]: Finished difference. Result has 229 places, 164 transitions, 2362 flow [2023-11-06 22:19:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=4576, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2362, PETRI_PLACES=229, PETRI_TRANSITIONS=164} [2023-11-06 22:19:46,573 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 204 predicate places. [2023-11-06 22:19:46,573 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 164 transitions, 2362 flow [2023-11-06 22:19:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 152.46666666666667) internal successors, (2287), 15 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:46,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:46,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:46,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:19:46,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:46,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash 875227914, now seen corresponding path program 8 times [2023-11-06 22:19:46,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:46,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48423442] [2023-11-06 22:19:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:46,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:48,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48423442] [2023-11-06 22:19:48,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48423442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005408857] [2023-11-06 22:19:48,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:48,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:48,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:48,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82486bce-610c-4e0a-9acb-b4f04c8dfc2f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:19:49,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:49,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:49,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:19:49,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:49,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:19:49,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:49,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:19:50,749 INFO L322 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-11-06 22:19:50,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 52 [2023-11-06 22:19:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:50,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:57,068 INFO L322 Elim1Store]: treesize reduction 144, result has 87.7 percent of original size [2023-11-06 22:19:57,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 9627 treesize of output 9202 [2023-11-06 22:19:58,590 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:58,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 2588 treesize of output 2582 [2023-11-06 22:19:59,378 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:59,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 2233 treesize of output 2160 [2023-11-06 22:19:59,849 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:59,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1983 treesize of output 1834 [2023-11-06 22:20:00,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:20:00,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1759 treesize of output 1648