./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/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_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/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_513a0aab-f792-44e7-b73b-a773dcf5d4aa/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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:07:35,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:07:35,376 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:07:35,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:07:35,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:07:35,417 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:07:35,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:07:35,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:07:35,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:07:35,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:07:35,421 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:07:35,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:07:35,422 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:07:35,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:07:35,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:07:35,424 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:07:35,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:07:35,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:07:35,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:07:35,427 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:07:35,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:07:35,428 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:07:35,429 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:07:35,429 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:07:35,430 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:07:35,431 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:07:35,431 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:07:35,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:07:35,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:35,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:07:35,434 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:07:35,434 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:07:35,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:07:35,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:07:35,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:07:35,436 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:07:35,437 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:07:35,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:07:35,438 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:07:35,438 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_513a0aab-f792-44e7-b73b-a773dcf5d4aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2023-11-06 23:07:35,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:07:35,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:07:35,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:07:35,797 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:07:35,798 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:07:35,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-06 23:07:39,001 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:07:39,223 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:07:39,224 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-06 23:07:39,232 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/data/0e8145ed2/e8c27003d8b3420c86c3351542f22108/FLAG47c364cfd [2023-11-06 23:07:39,248 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/data/0e8145ed2/e8c27003d8b3420c86c3351542f22108 [2023-11-06 23:07:39,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:07:39,253 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:07:39,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:39,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:07:39,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:07:39,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,263 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdad164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39, skipping insertion in model container [2023-11-06 23:07:39,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,287 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:07:39,524 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_513a0aab-f792-44e7-b73b-a773dcf5d4aa/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2023-11-06 23:07:39,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:39,544 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:07:39,579 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_513a0aab-f792-44e7-b73b-a773dcf5d4aa/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2023-11-06 23:07:39,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:39,626 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:07:39,627 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:07:39,635 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:07:39,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39 WrapperNode [2023-11-06 23:07:39,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:39,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:39,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:07:39,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:07:39,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,698 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-11-06 23:07:39,699 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:39,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:07:39,700 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:07:39,700 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:07:39,714 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:07:39,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:07:39,732 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:07:39,732 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:07:39,733 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (1/1) ... [2023-11-06 23:07:39,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:39,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:39,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:07:39,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:07:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:07:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:07:39,809 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:07:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:07:39,809 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:07:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:07:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:07:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:07:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:07:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:07:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:07:39,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:07:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:07:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:07:39,813 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:07:39,912 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:07:39,914 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:07:40,115 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:07:40,161 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:07:40,162 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:07:40,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:40 BoogieIcfgContainer [2023-11-06 23:07:40,165 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:07:40,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:07:40,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:07:40,172 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:07:40,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:07:39" (1/3) ... [2023-11-06 23:07:40,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6391e00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:40, skipping insertion in model container [2023-11-06 23:07:40,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:39" (2/3) ... [2023-11-06 23:07:40,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6391e00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:40, skipping insertion in model container [2023-11-06 23:07:40,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:40" (3/3) ... [2023-11-06 23:07:40,175 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-06 23:07:40,185 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:07:40,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:07:40,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:07:40,198 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:07:40,256 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:07:40,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 166 flow [2023-11-06 23:07:40,379 INFO L124 PetriNetUnfolderBase]: 5/74 cut-off events. [2023-11-06 23:07:40,380 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:07:40,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 5/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-06 23:07:40,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 76 transitions, 166 flow [2023-11-06 23:07:40,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 142 flow [2023-11-06 23:07:40,396 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:07:40,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 65 transitions, 142 flow [2023-11-06 23:07:40,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 65 transitions, 142 flow [2023-11-06 23:07:40,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 142 flow [2023-11-06 23:07:40,437 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2023-11-06 23:07:40,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:07:40,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 5/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-06 23:07:40,440 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-11-06 23:07:42,398 INFO L134 LiptonReduction]: Checked pairs total: 567 [2023-11-06 23:07:42,398 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-11-06 23:07:42,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:07:42,421 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;@3ca0183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:07:42,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 23:07:42,427 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:07:42,427 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-06 23:07:42,427 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:07:42,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:42,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:42,429 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 23:07:42,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash -411843293, now seen corresponding path program 1 times [2023-11-06 23:07:42,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211435920] [2023-11-06 23:07:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:42,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:42,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:42,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211435920] [2023-11-06 23:07:42,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211435920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:42,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:42,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:07:42,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989709807] [2023-11-06 23:07:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:42,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:42,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:42,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 132 [2023-11-06 23:07:42,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:42,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 132 [2023-11-06 23:07:42,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:42,887 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-11-06 23:07:42,887 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 23:07:42,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 261 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-11-06 23:07:42,892 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-11-06 23:07:42,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-11-06 23:07:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-11-06 23:07:42,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2023-11-06 23:07:42,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-11-06 23:07:42,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-11-06 23:07:42,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:42,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-11-06 23:07:42,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 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 23:07:42,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 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 23:07:42,926 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 219 transitions. [2023-11-06 23:07:42,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-11-06 23:07:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:07:42,931 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-11-06 23:07:42,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-06 23:07:42,937 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-06 23:07:42,938 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-11-06 23:07:42,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:42,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:42,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:07:42,939 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 23:07:42,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1660892495, now seen corresponding path program 1 times [2023-11-06 23:07:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:42,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220567327] [2023-11-06 23:07:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:42,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220567327] [2023-11-06 23:07:43,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220567327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:43,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:43,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:07:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055078983] [2023-11-06 23:07:43,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:43,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:43,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 132 [2023-11-06 23:07:43,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:43,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 132 [2023-11-06 23:07:43,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:43,359 INFO L124 PetriNetUnfolderBase]: 77/149 cut-off events. [2023-11-06 23:07:43,360 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-06 23:07:43,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 149 events. 77/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 440 event pairs, 24 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 183. Up to 78 conditions per place. [2023-11-06 23:07:43,362 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 30 selfloop transitions, 3 changer transitions 3/36 dead transitions. [2023-11-06 23:07:43,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 36 transitions, 177 flow [2023-11-06 23:07:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:07:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:07:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2023-11-06 23:07:43,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2023-11-06 23:07:43,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 314 transitions. [2023-11-06 23:07:43,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 314 transitions. [2023-11-06 23:07:43,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:43,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 314 transitions. [2023-11-06 23:07:43,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,373 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,373 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 314 transitions. [2023-11-06 23:07:43,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 36 transitions, 177 flow [2023-11-06 23:07:43,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 36 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:07:43,375 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 72 flow [2023-11-06 23:07:43,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-11-06 23:07:43,376 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-06 23:07:43,376 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 72 flow [2023-11-06 23:07:43,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:43,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:43,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:07:43,378 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 23:07:43,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1220842945, now seen corresponding path program 2 times [2023-11-06 23:07:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:43,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653018809] [2023-11-06 23:07:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:43,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653018809] [2023-11-06 23:07:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653018809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079391408] [2023-11-06 23:07:43,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:43,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:43,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:43,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:07:43,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:43,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:43,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:07:43,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:43,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:43,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079391408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:43,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:43,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 23:07:43,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120667224] [2023-11-06 23:07:43,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:43,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:07:43,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:43,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:07:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:07:43,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:43,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:43,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:43,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:44,056 INFO L124 PetriNetUnfolderBase]: 82/158 cut-off events. [2023-11-06 23:07:44,056 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-06 23:07:44,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 158 events. 82/158 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 493 event pairs, 13 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 148. Up to 53 conditions per place. [2023-11-06 23:07:44,063 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 35 selfloop transitions, 8 changer transitions 5/48 dead transitions. [2023-11-06 23:07:44,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 282 flow [2023-11-06 23:07:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:07:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:07:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 424 transitions. [2023-11-06 23:07:44,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2023-11-06 23:07:44,071 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 424 transitions. [2023-11-06 23:07:44,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 424 transitions. [2023-11-06 23:07:44,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:44,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 424 transitions. [2023-11-06 23:07:44,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.57142857142857) internal successors, (424), 7 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,081 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,081 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 72 flow. Second operand 7 states and 424 transitions. [2023-11-06 23:07:44,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 282 flow [2023-11-06 23:07:44,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 48 transitions, 258 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 23:07:44,089 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 123 flow [2023-11-06 23:07:44,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-06 23:07:44,091 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-06 23:07:44,091 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 123 flow [2023-11-06 23:07:44,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:44,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:44,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:07:44,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:44,298 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 23:07:44,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1520798951, now seen corresponding path program 3 times [2023-11-06 23:07:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348312403] [2023-11-06 23:07:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:44,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:44,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:44,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348312403] [2023-11-06 23:07:44,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348312403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:44,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:44,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:07:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960334916] [2023-11-06 23:07:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:44,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:44,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:44,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 132 [2023-11-06 23:07:44,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:44,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 132 [2023-11-06 23:07:44,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:44,590 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-11-06 23:07:44,591 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2023-11-06 23:07:44,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 136 events. 71/136 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 360 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 314. Up to 99 conditions per place. [2023-11-06 23:07:44,593 INFO L140 encePairwiseOnDemand]: 127/132 looper letters, 23 selfloop transitions, 9 changer transitions 2/34 dead transitions. [2023-11-06 23:07:44,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 242 flow [2023-11-06 23:07:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:07:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:07:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 303 transitions. [2023-11-06 23:07:44,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2023-11-06 23:07:44,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 303 transitions. [2023-11-06 23:07:44,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 303 transitions. [2023-11-06 23:07:44,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:44,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 303 transitions. [2023-11-06 23:07:44,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,603 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,603 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 123 flow. Second operand 5 states and 303 transitions. [2023-11-06 23:07:44,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 242 flow [2023-11-06 23:07:44,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 226 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 23:07:44,608 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 158 flow [2023-11-06 23:07:44,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-11-06 23:07:44,610 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-11-06 23:07:44,610 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 158 flow [2023-11-06 23:07:44,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:44,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:44,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:07:44,612 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 23:07:44,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1452391529, now seen corresponding path program 4 times [2023-11-06 23:07:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:44,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91622481] [2023-11-06 23:07:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:44,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91622481] [2023-11-06 23:07:44,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91622481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:44,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:44,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:07:44,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786616882] [2023-11-06 23:07:44,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:44,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:44,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:44,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 132 [2023-11-06 23:07:44,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:44,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 132 [2023-11-06 23:07:44,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:44,799 INFO L124 PetriNetUnfolderBase]: 68/131 cut-off events. [2023-11-06 23:07:44,799 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2023-11-06 23:07:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 131 events. 68/131 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 343 event pairs, 28 based on Foata normal form. 2/133 useless extension candidates. Maximal degree in co-relation 313. Up to 116 conditions per place. [2023-11-06 23:07:44,802 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 25 selfloop transitions, 6 changer transitions 2/33 dead transitions. [2023-11-06 23:07:44,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 267 flow [2023-11-06 23:07:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:07:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:07:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 300 transitions. [2023-11-06 23:07:44,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-06 23:07:44,805 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 300 transitions. [2023-11-06 23:07:44,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 300 transitions. [2023-11-06 23:07:44,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:44,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 300 transitions. [2023-11-06 23:07:44,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,809 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 158 flow. Second operand 5 states and 300 transitions. [2023-11-06 23:07:44,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 267 flow [2023-11-06 23:07:44,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 243 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 23:07:44,814 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 178 flow [2023-11-06 23:07:44,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-11-06 23:07:44,815 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-11-06 23:07:44,815 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 178 flow [2023-11-06 23:07:44,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:44,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:44,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:44,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:07:44,817 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 23:07:44,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1912686041, now seen corresponding path program 5 times [2023-11-06 23:07:44,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:44,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126139199] [2023-11-06 23:07:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:44,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:44,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:44,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126139199] [2023-11-06 23:07:44,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126139199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:44,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441972951] [2023-11-06 23:07:44,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:07:44,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:44,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:44,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:44,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:07:45,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:45,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:45,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:07:45,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441972951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:45,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:45,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 23:07:45,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181734399] [2023-11-06 23:07:45,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:45,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:07:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:07:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:07:45,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:45,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:45,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:45,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:45,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:45,357 INFO L124 PetriNetUnfolderBase]: 83/156 cut-off events. [2023-11-06 23:07:45,357 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2023-11-06 23:07:45,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 156 events. 83/156 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 440 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 441. Up to 82 conditions per place. [2023-11-06 23:07:45,360 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 39 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-11-06 23:07:45,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 416 flow [2023-11-06 23:07:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:07:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:07:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2023-11-06 23:07:45,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2023-11-06 23:07:45,364 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2023-11-06 23:07:45,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2023-11-06 23:07:45,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:45,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2023-11-06 23:07:45,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:45,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 132.0) internal successors, (1452), 11 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:45,373 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 132.0) internal successors, (1452), 11 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:45,373 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 178 flow. Second operand 10 states and 590 transitions. [2023-11-06 23:07:45,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 416 flow [2023-11-06 23:07:45,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 400 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 23:07:45,379 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 269 flow [2023-11-06 23:07:45,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-11-06 23:07:45,382 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-11-06 23:07:45,383 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 269 flow [2023-11-06 23:07:45,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:45,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:45,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:45,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:45,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:45,590 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 23:07:45,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash -295622305, now seen corresponding path program 6 times [2023-11-06 23:07:45,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:45,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267110039] [2023-11-06 23:07:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:45,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:45,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267110039] [2023-11-06 23:07:45,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267110039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360101075] [2023-11-06 23:07:45,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:07:45,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:45,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:45,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:07:45,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:07:45,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:45,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:07:45,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360101075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:45,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:45,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 23:07:45,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078944678] [2023-11-06 23:07:45,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:07:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:07:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:07:45,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:45,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 269 flow. Second operand has 10 states, 10 states have (on average 56.4) internal successors, (564), 10 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:45,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:45,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:45,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:46,064 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-11-06 23:07:46,064 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-11-06 23:07:46,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 140 events. 75/140 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 370 event pairs, 18 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 559. Up to 90 conditions per place. [2023-11-06 23:07:46,067 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 30 selfloop transitions, 15 changer transitions 1/46 dead transitions. [2023-11-06 23:07:46,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 412 flow [2023-11-06 23:07:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:07:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:07:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 359 transitions. [2023-11-06 23:07:46,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532828282828283 [2023-11-06 23:07:46,070 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 359 transitions. [2023-11-06 23:07:46,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 359 transitions. [2023-11-06 23:07:46,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:46,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 359 transitions. [2023-11-06 23:07:46,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,075 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,075 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 269 flow. Second operand 6 states and 359 transitions. [2023-11-06 23:07:46,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 412 flow [2023-11-06 23:07:46,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 368 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-06 23:07:46,081 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 264 flow [2023-11-06 23:07:46,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-11-06 23:07:46,082 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-06 23:07:46,082 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 264 flow [2023-11-06 23:07:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.4) internal successors, (564), 10 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:46,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:46,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:46,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:46,289 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 23:07:46,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash 327082285, now seen corresponding path program 1 times [2023-11-06 23:07:46,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:46,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874253082] [2023-11-06 23:07:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:46,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874253082] [2023-11-06 23:07:46,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874253082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:46,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578044557] [2023-11-06 23:07:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:46,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:46,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:46,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:46,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:07:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:46,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:07:46,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:46,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:46,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578044557] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:46,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:46,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-11-06 23:07:46,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523163832] [2023-11-06 23:07:46,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:46,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:07:46,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:07:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:07:46,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 132 [2023-11-06 23:07:46,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:46,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 132 [2023-11-06 23:07:46,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:46,637 INFO L124 PetriNetUnfolderBase]: 122/230 cut-off events. [2023-11-06 23:07:46,638 INFO L125 PetriNetUnfolderBase]: For 643/653 co-relation queries the response was YES. [2023-11-06 23:07:46,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 230 events. 122/230 cut-off events. For 643/653 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 790 event pairs, 8 based on Foata normal form. 15/243 useless extension candidates. Maximal degree in co-relation 840. Up to 113 conditions per place. [2023-11-06 23:07:46,641 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 38 selfloop transitions, 11 changer transitions 10/65 dead transitions. [2023-11-06 23:07:46,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 553 flow [2023-11-06 23:07:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:07:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:07:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 295 transitions. [2023-11-06 23:07:46,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587121212121212 [2023-11-06 23:07:46,643 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 295 transitions. [2023-11-06 23:07:46,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 295 transitions. [2023-11-06 23:07:46,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:46,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 295 transitions. [2023-11-06 23:07:46,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 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 23:07:46,647 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 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 23:07:46,647 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 264 flow. Second operand 4 states and 295 transitions. [2023-11-06 23:07:46,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 553 flow [2023-11-06 23:07:46,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 450 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-11-06 23:07:46,653 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 303 flow [2023-11-06 23:07:46,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-06 23:07:46,657 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-06 23:07:46,657 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 303 flow [2023-11-06 23:07:46,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:46,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:46,657 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:46,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:46,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:46,864 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 23:07:46,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1327958533, now seen corresponding path program 2 times [2023-11-06 23:07:46,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:46,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240208947] [2023-11-06 23:07:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:46,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:46,956 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 23:07:46,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240208947] [2023-11-06 23:07:46,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240208947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074266256] [2023-11-06 23:07:46,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:46,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:46,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:46,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:46,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:07:47,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:47,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:47,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:47,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:47,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074266256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:47,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:47,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 23:07:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471429900] [2023-11-06 23:07:47,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:47,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:07:47,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:47,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:07:47,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:07:47,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:47,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 303 flow. Second operand has 11 states, 11 states have (on average 56.27272727272727) internal successors, (619), 11 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:47,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:47,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:47,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:47,458 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2023-11-06 23:07:47,458 INFO L125 PetriNetUnfolderBase]: For 536/536 co-relation queries the response was YES. [2023-11-06 23:07:47,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 293 events. 150/293 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1138 event pairs, 11 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1060. Up to 95 conditions per place. [2023-11-06 23:07:47,461 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 53 selfloop transitions, 23 changer transitions 10/86 dead transitions. [2023-11-06 23:07:47,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 86 transitions, 692 flow [2023-11-06 23:07:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:07:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:07:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 600 transitions. [2023-11-06 23:07:47,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-06 23:07:47,465 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 600 transitions. [2023-11-06 23:07:47,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 600 transitions. [2023-11-06 23:07:47,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:47,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 600 transitions. [2023-11-06 23:07:47,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.0) internal successors, (600), 10 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:47,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 132.0) internal successors, (1452), 11 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:47,472 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 132.0) internal successors, (1452), 11 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:47,472 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 303 flow. Second operand 10 states and 600 transitions. [2023-11-06 23:07:47,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 86 transitions, 692 flow [2023-11-06 23:07:47,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 676 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:47,479 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 464 flow [2023-11-06 23:07:47,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=464, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-11-06 23:07:47,481 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-06 23:07:47,481 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 464 flow [2023-11-06 23:07:47,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 56.27272727272727) internal successors, (619), 11 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:47,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:47,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:47,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:47,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:47,688 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 23:07:47,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1666172445, now seen corresponding path program 3 times [2023-11-06 23:07:47,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:47,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56260397] [2023-11-06 23:07:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:47,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:47,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56260397] [2023-11-06 23:07:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56260397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:47,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681852414] [2023-11-06 23:07:47,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:47,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:47,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:47,789 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:47,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:07:47,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:07:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:47,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:47,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:47,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:47,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681852414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:47,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:47,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 23:07:47,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757979205] [2023-11-06 23:07:47,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:47,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:07:47,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:47,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:07:47,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:07:48,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:48,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 55.92307692307692) internal successors, (727), 13 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:48,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:48,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:48,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:48,364 INFO L124 PetriNetUnfolderBase]: 184/334 cut-off events. [2023-11-06 23:07:48,364 INFO L125 PetriNetUnfolderBase]: For 1509/1509 co-relation queries the response was YES. [2023-11-06 23:07:48,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 334 events. 184/334 cut-off events. For 1509/1509 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1213 event pairs, 20 based on Foata normal form. 20/354 useless extension candidates. Maximal degree in co-relation 1467. Up to 125 conditions per place. [2023-11-06 23:07:48,368 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 58 selfloop transitions, 43 changer transitions 1/102 dead transitions. [2023-11-06 23:07:48,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 1038 flow [2023-11-06 23:07:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:07:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:07:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 829 transitions. [2023-11-06 23:07:48,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485930735930736 [2023-11-06 23:07:48,373 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 829 transitions. [2023-11-06 23:07:48,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 829 transitions. [2023-11-06 23:07:48,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:48,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 829 transitions. [2023-11-06 23:07:48,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.214285714285715) internal successors, (829), 14 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:48,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 132.0) internal successors, (1980), 15 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:48,382 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 132.0) internal successors, (1980), 15 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:48,382 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 464 flow. Second operand 14 states and 829 transitions. [2023-11-06 23:07:48,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 1038 flow [2023-11-06 23:07:48,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 942 flow, removed 41 selfloop flow, removed 3 redundant places. [2023-11-06 23:07:48,393 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 794 flow [2023-11-06 23:07:48,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=794, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2023-11-06 23:07:48,394 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-11-06 23:07:48,394 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 794 flow [2023-11-06 23:07:48,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 55.92307692307692) internal successors, (727), 13 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:48,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:48,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:48,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:48,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:07:48,600 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 23:07:48,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -708046563, now seen corresponding path program 4 times [2023-11-06 23:07:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:48,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063249877] [2023-11-06 23:07:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:48,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063249877] [2023-11-06 23:07:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063249877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079596032] [2023-11-06 23:07:48,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:07:48,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:48,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:48,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:48,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:07:48,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:07:48,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:48,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:48,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:48,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079596032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:48,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 23:07:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436747380] [2023-11-06 23:07:48,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:07:48,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:07:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:07:48,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:48,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 794 flow. Second operand has 12 states, 12 states have (on average 56.0) internal successors, (672), 12 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:48,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:48,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:48,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:49,290 INFO L124 PetriNetUnfolderBase]: 258/460 cut-off events. [2023-11-06 23:07:49,290 INFO L125 PetriNetUnfolderBase]: For 5125/5125 co-relation queries the response was YES. [2023-11-06 23:07:49,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2728 conditions, 460 events. 258/460 cut-off events. For 5125/5125 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1782 event pairs, 22 based on Foata normal form. 26/486 useless extension candidates. Maximal degree in co-relation 2481. Up to 183 conditions per place. [2023-11-06 23:07:49,297 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 58 selfloop transitions, 72 changer transitions 3/133 dead transitions. [2023-11-06 23:07:49,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 1588 flow [2023-11-06 23:07:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:07:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:07:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 942 transitions. [2023-11-06 23:07:49,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2023-11-06 23:07:49,303 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 942 transitions. [2023-11-06 23:07:49,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 942 transitions. [2023-11-06 23:07:49,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:49,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 942 transitions. [2023-11-06 23:07:49,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.875) internal successors, (942), 16 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,313 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,314 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 794 flow. Second operand 16 states and 942 transitions. [2023-11-06 23:07:49,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 1588 flow [2023-11-06 23:07:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 133 transitions, 1414 flow, removed 76 selfloop flow, removed 4 redundant places. [2023-11-06 23:07:49,341 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 1260 flow [2023-11-06 23:07:49,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1260, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2023-11-06 23:07:49,342 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 76 predicate places. [2023-11-06 23:07:49,342 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 1260 flow [2023-11-06 23:07:49,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.0) internal successors, (672), 12 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:49,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:49,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:49,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:07:49,549 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 23:07:49,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:49,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1544919191, now seen corresponding path program 5 times [2023-11-06 23:07:49,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:49,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482538952] [2023-11-06 23:07:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:49,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:49,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482538952] [2023-11-06 23:07:49,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482538952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:49,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345671408] [2023-11-06 23:07:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:07:49,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:49,647 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:49,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:07:49,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:07:49,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:49,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:49,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:49,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:49,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345671408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:49,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:49,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 23:07:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804360650] [2023-11-06 23:07:49,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:49,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:07:49,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:07:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:07:49,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:49,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 1260 flow. Second operand has 12 states, 12 states have (on average 56.0) internal successors, (672), 12 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:49,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:49,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:49,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:50,230 INFO L124 PetriNetUnfolderBase]: 247/455 cut-off events. [2023-11-06 23:07:50,230 INFO L125 PetriNetUnfolderBase]: For 5936/5936 co-relation queries the response was YES. [2023-11-06 23:07:50,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3063 conditions, 455 events. 247/455 cut-off events. For 5936/5936 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1851 event pairs, 45 based on Foata normal form. 6/461 useless extension candidates. Maximal degree in co-relation 2803. Up to 246 conditions per place. [2023-11-06 23:07:50,238 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 64 selfloop transitions, 58 changer transitions 2/124 dead transitions. [2023-11-06 23:07:50,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 1681 flow [2023-11-06 23:07:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:07:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:07:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 761 transitions. [2023-11-06 23:07:50,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44347319347319347 [2023-11-06 23:07:50,243 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 761 transitions. [2023-11-06 23:07:50,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 761 transitions. [2023-11-06 23:07:50,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:50,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 761 transitions. [2023-11-06 23:07:50,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 58.53846153846154) internal successors, (761), 13 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 132.0) internal successors, (1848), 14 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,252 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 132.0) internal successors, (1848), 14 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,252 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 1260 flow. Second operand 13 states and 761 transitions. [2023-11-06 23:07:50,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 1681 flow [2023-11-06 23:07:50,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 124 transitions, 1468 flow, removed 81 selfloop flow, removed 6 redundant places. [2023-11-06 23:07:50,289 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 1179 flow [2023-11-06 23:07:50,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1179, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2023-11-06 23:07:50,291 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 84 predicate places. [2023-11-06 23:07:50,291 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 1179 flow [2023-11-06 23:07:50,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.0) internal successors, (672), 12 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:50,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:50,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:50,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:07:50,498 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 23:07:50,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1108699879, now seen corresponding path program 6 times [2023-11-06 23:07:50,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:50,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151756735] [2023-11-06 23:07:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:50,621 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 23:07:50,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151756735] [2023-11-06 23:07:50,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151756735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374668819] [2023-11-06 23:07:50,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:07:50,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:50,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:50,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:50,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:07:50,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:07:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:50,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:50,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:50,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374668819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:50,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:50,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 23:07:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709173681] [2023-11-06 23:07:50,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:50,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:07:50,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:07:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:07:50,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:50,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 1179 flow. Second operand has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:50,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:50,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:51,560 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-11-06 23:07:51,560 INFO L125 PetriNetUnfolderBase]: For 8063/8063 co-relation queries the response was YES. [2023-11-06 23:07:51,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4650 conditions, 722 events. 396/722 cut-off events. For 8063/8063 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3355 event pairs, 30 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 4256. Up to 237 conditions per place. [2023-11-06 23:07:51,573 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-11-06 23:07:51,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 207 transitions, 2614 flow [2023-11-06 23:07:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:07:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 23:07:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1345 transitions. [2023-11-06 23:07:51,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430171277997365 [2023-11-06 23:07:51,578 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1345 transitions. [2023-11-06 23:07:51,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1345 transitions. [2023-11-06 23:07:51,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:51,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1345 transitions. [2023-11-06 23:07:51,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.47826086956522) internal successors, (1345), 23 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:51,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 132.0) internal successors, (3168), 24 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:51,591 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 132.0) internal successors, (3168), 24 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:51,591 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 1179 flow. Second operand 23 states and 1345 transitions. [2023-11-06 23:07:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 207 transitions, 2614 flow [2023-11-06 23:07:51,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 207 transitions, 2385 flow, removed 16 selfloop flow, removed 12 redundant places. [2023-11-06 23:07:51,634 INFO L231 Difference]: Finished difference. Result has 120 places, 164 transitions, 2169 flow [2023-11-06 23:07:51,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2169, PETRI_PLACES=120, PETRI_TRANSITIONS=164} [2023-11-06 23:07:51,636 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-11-06 23:07:51,636 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 164 transitions, 2169 flow [2023-11-06 23:07:51,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:51,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:51,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:51,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:51,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:07:51,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:51,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash -21499201, now seen corresponding path program 7 times [2023-11-06 23:07:51,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:51,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188439197] [2023-11-06 23:07:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:51,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188439197] [2023-11-06 23:07:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188439197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:51,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034505216] [2023-11-06 23:07:51,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:07:51,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:51,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:51,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:07:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:52,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:52,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:52,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:52,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034505216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:52,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:52,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 23:07:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942916008] [2023-11-06 23:07:52,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:07:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:07:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:07:52,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:52,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 164 transitions, 2169 flow. Second operand has 15 states, 15 states have (on average 55.8) internal successors, (837), 15 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:52,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:52,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:52,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:52,703 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-11-06 23:07:52,703 INFO L125 PetriNetUnfolderBase]: For 12508/12508 co-relation queries the response was YES. [2023-11-06 23:07:52,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 790 events. 438/790 cut-off events. For 12508/12508 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3690 event pairs, 101 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 5085. Up to 620 conditions per place. [2023-11-06 23:07:52,718 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 170 selfloop transitions, 54 changer transitions 0/224 dead transitions. [2023-11-06 23:07:52,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 224 transitions, 3286 flow [2023-11-06 23:07:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:07:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:07:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1062 transitions. [2023-11-06 23:07:52,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2023-11-06 23:07:52,725 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1062 transitions. [2023-11-06 23:07:52,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1062 transitions. [2023-11-06 23:07:52,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:52,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1062 transitions. [2023-11-06 23:07:52,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.0) internal successors, (1062), 18 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:52,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 132.0) internal successors, (2508), 19 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:52,735 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 132.0) internal successors, (2508), 19 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:52,735 INFO L175 Difference]: Start difference. First operand has 120 places, 164 transitions, 2169 flow. Second operand 18 states and 1062 transitions. [2023-11-06 23:07:52,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 224 transitions, 3286 flow [2023-11-06 23:07:52,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 224 transitions, 3124 flow, removed 56 selfloop flow, removed 8 redundant places. [2023-11-06 23:07:52,805 INFO L231 Difference]: Finished difference. Result has 141 places, 192 transitions, 2727 flow [2023-11-06 23:07:52,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2727, PETRI_PLACES=141, PETRI_TRANSITIONS=192} [2023-11-06 23:07:52,806 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-11-06 23:07:52,807 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 192 transitions, 2727 flow [2023-11-06 23:07:52,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.8) internal successors, (837), 15 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:52,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:52,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:52,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:07:53,018 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:53,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1845777643, now seen corresponding path program 8 times [2023-11-06 23:07:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:53,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092114134] [2023-11-06 23:07:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:53,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:53,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092114134] [2023-11-06 23:07:53,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092114134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:53,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519246091] [2023-11-06 23:07:53,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:53,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:53,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:53,111 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:53,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:07:53,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:53,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:53,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:53,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:53,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:53,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519246091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:53,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:53,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-06 23:07:53,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281707759] [2023-11-06 23:07:53,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:53,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:07:53,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:07:53,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:07:53,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:53,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 192 transitions, 2727 flow. Second operand has 13 states, 13 states have (on average 56.0) internal successors, (728), 13 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:53,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:53,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:53,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:53,702 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-11-06 23:07:53,702 INFO L125 PetriNetUnfolderBase]: For 14254/14254 co-relation queries the response was YES. [2023-11-06 23:07:53,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 793 events. 443/793 cut-off events. For 14254/14254 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3684 event pairs, 104 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5517. Up to 645 conditions per place. [2023-11-06 23:07:53,718 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 159 selfloop transitions, 50 changer transitions 3/212 dead transitions. [2023-11-06 23:07:53,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 212 transitions, 3429 flow [2023-11-06 23:07:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:07:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 23:07:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 645 transitions. [2023-11-06 23:07:53,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2023-11-06 23:07:53,721 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 645 transitions. [2023-11-06 23:07:53,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 645 transitions. [2023-11-06 23:07:53,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:53,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 645 transitions. [2023-11-06 23:07:53,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.63636363636363) internal successors, (645), 11 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:53,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 132.0) internal successors, (1584), 12 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:53,731 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 132.0) internal successors, (1584), 12 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:53,731 INFO L175 Difference]: Start difference. First operand has 141 places, 192 transitions, 2727 flow. Second operand 11 states and 645 transitions. [2023-11-06 23:07:53,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 212 transitions, 3429 flow [2023-11-06 23:07:53,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 212 transitions, 2955 flow, removed 221 selfloop flow, removed 5 redundant places. [2023-11-06 23:07:53,865 INFO L231 Difference]: Finished difference. Result has 147 places, 194 transitions, 2447 flow [2023-11-06 23:07:53,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2447, PETRI_PLACES=147, PETRI_TRANSITIONS=194} [2023-11-06 23:07:53,866 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 127 predicate places. [2023-11-06 23:07:53,866 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 194 transitions, 2447 flow [2023-11-06 23:07:53,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.0) internal successors, (728), 13 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:53,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:53,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:53,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:54,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:07:54,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:54,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash 336051549, now seen corresponding path program 9 times [2023-11-06 23:07:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:54,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609204857] [2023-11-06 23:07:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609204857] [2023-11-06 23:07:54,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609204857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:54,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097440469] [2023-11-06 23:07:54,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:54,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:54,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:54,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:54,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:07:54,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:07:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:54,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:07:54,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:54,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:54,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097440469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:54,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:54,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2023-11-06 23:07:54,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636801584] [2023-11-06 23:07:54,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:54,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:07:54,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:07:54,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:07:54,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 132 [2023-11-06 23:07:54,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 194 transitions, 2447 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 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 23:07:54,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:54,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 132 [2023-11-06 23:07:54,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:54,853 INFO L124 PetriNetUnfolderBase]: 654/1167 cut-off events. [2023-11-06 23:07:54,854 INFO L125 PetriNetUnfolderBase]: For 21771/21783 co-relation queries the response was YES. [2023-11-06 23:07:54,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1167 events. 654/1167 cut-off events. For 21771/21783 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6069 event pairs, 34 based on Foata normal form. 16/1181 useless extension candidates. Maximal degree in co-relation 7946. Up to 620 conditions per place. [2023-11-06 23:07:54,874 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 189 selfloop transitions, 81 changer transitions 46/323 dead transitions. [2023-11-06 23:07:54,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 323 transitions, 4675 flow [2023-11-06 23:07:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:07:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:07:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 371 transitions. [2023-11-06 23:07:54,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621212121212121 [2023-11-06 23:07:54,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 371 transitions. [2023-11-06 23:07:54,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 371 transitions. [2023-11-06 23:07:54,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:54,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 371 transitions. [2023-11-06 23:07:54,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:54,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:54,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:54,881 INFO L175 Difference]: Start difference. First operand has 147 places, 194 transitions, 2447 flow. Second operand 5 states and 371 transitions. [2023-11-06 23:07:54,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 323 transitions, 4675 flow [2023-11-06 23:07:55,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 323 transitions, 4580 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 23:07:55,019 INFO L231 Difference]: Finished difference. Result has 149 places, 240 transitions, 3299 flow [2023-11-06 23:07:55,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3299, PETRI_PLACES=149, PETRI_TRANSITIONS=240} [2023-11-06 23:07:55,020 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-11-06 23:07:55,020 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 240 transitions, 3299 flow [2023-11-06 23:07:55,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 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 23:07:55,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:55,021 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:55,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:07:55,227 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:55,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -710260155, now seen corresponding path program 10 times [2023-11-06 23:07:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541809894] [2023-11-06 23:07:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:55,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:55,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541809894] [2023-11-06 23:07:55,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541809894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51887742] [2023-11-06 23:07:55,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:07:55,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:55,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:55,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:07:55,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:07:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:55,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:07:55,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:55,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:55,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51887742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:55,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:55,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-06 23:07:55,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005231520] [2023-11-06 23:07:55,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:07:55,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:55,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:07:55,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:07:55,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:55,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 240 transitions, 3299 flow. Second operand has 14 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:55,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:55,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:55,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:56,348 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-11-06 23:07:56,349 INFO L125 PetriNetUnfolderBase]: For 32144/32144 co-relation queries the response was YES. [2023-11-06 23:07:56,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11256 conditions, 1418 events. 775/1418 cut-off events. For 32144/32144 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7892 event pairs, 33 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 10536. Up to 564 conditions per place. [2023-11-06 23:07:56,381 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-11-06 23:07:56,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 364 transitions, 5677 flow [2023-11-06 23:07:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:07:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:07:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 776 transitions. [2023-11-06 23:07:56,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522144522144522 [2023-11-06 23:07:56,384 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 776 transitions. [2023-11-06 23:07:56,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 776 transitions. [2023-11-06 23:07:56,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:56,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 776 transitions. [2023-11-06 23:07:56,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 59.69230769230769) internal successors, (776), 13 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:56,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 132.0) internal successors, (1848), 14 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:56,393 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 132.0) internal successors, (1848), 14 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:56,394 INFO L175 Difference]: Start difference. First operand has 149 places, 240 transitions, 3299 flow. Second operand 13 states and 776 transitions. [2023-11-06 23:07:56,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 364 transitions, 5677 flow [2023-11-06 23:07:56,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 364 transitions, 5591 flow, removed 43 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:56,596 INFO L231 Difference]: Finished difference. Result has 169 places, 302 transitions, 4719 flow [2023-11-06 23:07:56,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4719, PETRI_PLACES=169, PETRI_TRANSITIONS=302} [2023-11-06 23:07:56,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2023-11-06 23:07:56,597 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 302 transitions, 4719 flow [2023-11-06 23:07:56,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:56,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:56,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:56,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:07:56,804 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:56,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash 310656369, now seen corresponding path program 11 times [2023-11-06 23:07:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:56,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131340791] [2023-11-06 23:07:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:56,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:56,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:56,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131340791] [2023-11-06 23:07:56,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131340791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787463609] [2023-11-06 23:07:56,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:07:56,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:56,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:56,954 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:56,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:07:57,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:07:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:57,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:07:57,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:57,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:57,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787463609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:57,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:57,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 23:07:57,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851411931] [2023-11-06 23:07:57,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:57,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:07:57,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:07:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:07:57,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:57,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 302 transitions, 4719 flow. Second operand has 15 states, 15 states have (on average 55.8) internal successors, (837), 15 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:57,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:57,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:57,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:58,123 INFO L124 PetriNetUnfolderBase]: 897/1560 cut-off events. [2023-11-06 23:07:58,123 INFO L125 PetriNetUnfolderBase]: For 42942/42942 co-relation queries the response was YES. [2023-11-06 23:07:58,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14382 conditions, 1560 events. 897/1560 cut-off events. For 42942/42942 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8408 event pairs, 122 based on Foata normal form. 18/1578 useless extension candidates. Maximal degree in co-relation 13457. Up to 786 conditions per place. [2023-11-06 23:07:58,233 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 163 selfloop transitions, 236 changer transitions 6/405 dead transitions. [2023-11-06 23:07:58,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 405 transitions, 7618 flow [2023-11-06 23:07:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:07:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 23:07:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1113 transitions. [2023-11-06 23:07:58,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437799043062201 [2023-11-06 23:07:58,237 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1113 transitions. [2023-11-06 23:07:58,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1113 transitions. [2023-11-06 23:07:58,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:58,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1113 transitions. [2023-11-06 23:07:58,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.578947368421055) internal successors, (1113), 19 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:58,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 132.0) internal successors, (2640), 20 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:58,245 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 132.0) internal successors, (2640), 20 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:58,246 INFO L175 Difference]: Start difference. First operand has 169 places, 302 transitions, 4719 flow. Second operand 19 states and 1113 transitions. [2023-11-06 23:07:58,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 405 transitions, 7618 flow [2023-11-06 23:07:58,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 405 transitions, 7471 flow, removed 65 selfloop flow, removed 3 redundant places. [2023-11-06 23:07:58,534 INFO L231 Difference]: Finished difference. Result has 190 places, 366 transitions, 6904 flow [2023-11-06 23:07:58,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=4616, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6904, PETRI_PLACES=190, PETRI_TRANSITIONS=366} [2023-11-06 23:07:58,535 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-11-06 23:07:58,536 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 366 transitions, 6904 flow [2023-11-06 23:07:58,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.8) internal successors, (837), 15 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:58,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:58,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:58,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:58,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:07:58,742 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:58,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1906218747, now seen corresponding path program 12 times [2023-11-06 23:07:58,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:58,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160450504] [2023-11-06 23:07:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:58,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160450504] [2023-11-06 23:07:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160450504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672052495] [2023-11-06 23:07:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:07:58,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:58,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:58,904 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:58,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:07:58,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:07:59,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:59,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:07:59,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:59,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:59,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672052495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:59,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:59,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 23:07:59,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849166333] [2023-11-06 23:07:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:59,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:07:59,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:07:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:07:59,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:07:59,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 366 transitions, 6904 flow. Second operand has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:59,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:59,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:07:59,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:00,362 INFO L124 PetriNetUnfolderBase]: 1009/1776 cut-off events. [2023-11-06 23:08:00,362 INFO L125 PetriNetUnfolderBase]: For 65980/65980 co-relation queries the response was YES. [2023-11-06 23:08:00,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17304 conditions, 1776 events. 1009/1776 cut-off events. For 65980/65980 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9886 event pairs, 68 based on Foata normal form. 48/1824 useless extension candidates. Maximal degree in co-relation 16415. Up to 483 conditions per place. [2023-11-06 23:08:00,397 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 210 selfloop transitions, 249 changer transitions 7/466 dead transitions. [2023-11-06 23:08:00,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 466 transitions, 9304 flow [2023-11-06 23:08:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:08:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:08:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1238 transitions. [2023-11-06 23:08:00,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466089466089466 [2023-11-06 23:08:00,401 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1238 transitions. [2023-11-06 23:08:00,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1238 transitions. [2023-11-06 23:08:00,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:00,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1238 transitions. [2023-11-06 23:08:00,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 58.95238095238095) internal successors, (1238), 21 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 132.0) internal successors, (2904), 22 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,411 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 132.0) internal successors, (2904), 22 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,411 INFO L175 Difference]: Start difference. First operand has 190 places, 366 transitions, 6904 flow. Second operand 21 states and 1238 transitions. [2023-11-06 23:08:00,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 466 transitions, 9304 flow [2023-11-06 23:08:00,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 466 transitions, 7920 flow, removed 546 selfloop flow, removed 10 redundant places. [2023-11-06 23:08:00,937 INFO L231 Difference]: Finished difference. Result has 209 places, 413 transitions, 7320 flow [2023-11-06 23:08:00,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7320, PETRI_PLACES=209, PETRI_TRANSITIONS=413} [2023-11-06 23:08:00,938 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-06 23:08:00,938 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 413 transitions, 7320 flow [2023-11-06 23:08:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:00,940 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:00,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 23:08:01,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:01,145 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:01,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1327165793, now seen corresponding path program 13 times [2023-11-06 23:08:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050426556] [2023-11-06 23:08:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:01,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:01,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050426556] [2023-11-06 23:08:01,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050426556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:01,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557557466] [2023-11-06 23:08:01,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:08:01,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:01,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:01,265 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:01,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:08:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:01,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:01,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:01,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:01,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557557466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:01,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:01,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 23:08:01,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238986725] [2023-11-06 23:08:01,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:01,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:08:01,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:01,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:08:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:08:01,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:01,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 413 transitions, 7320 flow. Second operand has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:01,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:01,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:01,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:02,844 INFO L124 PetriNetUnfolderBase]: 1011/1816 cut-off events. [2023-11-06 23:08:02,844 INFO L125 PetriNetUnfolderBase]: For 45382/45382 co-relation queries the response was YES. [2023-11-06 23:08:02,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16550 conditions, 1816 events. 1011/1816 cut-off events. For 45382/45382 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10433 event pairs, 63 based on Foata normal form. 38/1854 useless extension candidates. Maximal degree in co-relation 15989. Up to 631 conditions per place. [2023-11-06 23:08:02,875 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 136 selfloop transitions, 329 changer transitions 1/466 dead transitions. [2023-11-06 23:08:02,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 466 transitions, 8865 flow [2023-11-06 23:08:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:08:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:08:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1406 transitions. [2023-11-06 23:08:02,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438131313131313 [2023-11-06 23:08:02,880 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1406 transitions. [2023-11-06 23:08:02,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1406 transitions. [2023-11-06 23:08:02,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:02,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1406 transitions. [2023-11-06 23:08:02,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 58.583333333333336) internal successors, (1406), 24 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:02,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 132.0) internal successors, (3300), 25 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:02,892 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 132.0) internal successors, (3300), 25 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:02,892 INFO L175 Difference]: Start difference. First operand has 209 places, 413 transitions, 7320 flow. Second operand 24 states and 1406 transitions. [2023-11-06 23:08:02,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 466 transitions, 8865 flow [2023-11-06 23:08:03,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 466 transitions, 8550 flow, removed 101 selfloop flow, removed 10 redundant places. [2023-11-06 23:08:03,311 INFO L231 Difference]: Finished difference. Result has 223 places, 423 transitions, 7983 flow [2023-11-06 23:08:03,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7983, PETRI_PLACES=223, PETRI_TRANSITIONS=423} [2023-11-06 23:08:03,313 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-11-06 23:08:03,313 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 423 transitions, 7983 flow [2023-11-06 23:08:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:03,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:03,314 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:03,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:03,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:03,523 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:03,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:03,523 INFO L85 PathProgramCache]: Analyzing trace with hash -918444325, now seen corresponding path program 14 times [2023-11-06 23:08:03,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:03,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235327834] [2023-11-06 23:08:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:03,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:03,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:03,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235327834] [2023-11-06 23:08:03,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235327834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:03,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507564370] [2023-11-06 23:08:03,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:03,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:03,667 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:03,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:08:03,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:03,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:03,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:03,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:03,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507564370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:03,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:03,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 23:08:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764751822] [2023-11-06 23:08:03,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:03,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:08:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:08:03,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:08:04,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:04,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 423 transitions, 7983 flow. Second operand has 16 states, 16 states have (on average 56.0625) internal successors, (897), 16 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:04,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:04,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:04,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:05,078 INFO L124 PetriNetUnfolderBase]: 1081/1944 cut-off events. [2023-11-06 23:08:05,079 INFO L125 PetriNetUnfolderBase]: For 44613/44613 co-relation queries the response was YES. [2023-11-06 23:08:05,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18353 conditions, 1944 events. 1081/1944 cut-off events. For 44613/44613 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11378 event pairs, 110 based on Foata normal form. 10/1954 useless extension candidates. Maximal degree in co-relation 17749. Up to 766 conditions per place. [2023-11-06 23:08:05,108 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 292 selfloop transitions, 205 changer transitions 0/497 dead transitions. [2023-11-06 23:08:05,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 497 transitions, 9931 flow [2023-11-06 23:08:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:08:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 23:08:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1117 transitions. [2023-11-06 23:08:05,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44537480063795853 [2023-11-06 23:08:05,114 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1117 transitions. [2023-11-06 23:08:05,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1117 transitions. [2023-11-06 23:08:05,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:05,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1117 transitions. [2023-11-06 23:08:05,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.78947368421053) internal successors, (1117), 19 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:05,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 132.0) internal successors, (2640), 20 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:05,122 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 132.0) internal successors, (2640), 20 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:05,123 INFO L175 Difference]: Start difference. First operand has 223 places, 423 transitions, 7983 flow. Second operand 19 states and 1117 transitions. [2023-11-06 23:08:05,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 497 transitions, 9931 flow [2023-11-06 23:08:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 497 transitions, 9250 flow, removed 64 selfloop flow, removed 20 redundant places. [2023-11-06 23:08:05,509 INFO L231 Difference]: Finished difference. Result has 225 places, 450 transitions, 8399 flow [2023-11-06 23:08:05,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=7355, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8399, PETRI_PLACES=225, PETRI_TRANSITIONS=450} [2023-11-06 23:08:05,510 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2023-11-06 23:08:05,510 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 450 transitions, 8399 flow [2023-11-06 23:08:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.0625) internal successors, (897), 16 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:05,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:05,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:05,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:05,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:05,711 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:05,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:05,712 INFO L85 PathProgramCache]: Analyzing trace with hash 605065001, now seen corresponding path program 15 times [2023-11-06 23:08:05,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:05,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463254401] [2023-11-06 23:08:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:05,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:05,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463254401] [2023-11-06 23:08:05,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463254401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431008304] [2023-11-06 23:08:05,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:05,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:05,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:05,880 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:05,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:08:05,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:08:05,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:05,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:05,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:06,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431008304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:06,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:06,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-06 23:08:06,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519633949] [2023-11-06 23:08:06,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:06,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:08:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:08:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:08:06,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:06,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 450 transitions, 8399 flow. Second operand has 18 states, 18 states have (on average 56.05555555555556) internal successors, (1009), 18 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:06,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:06,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:06,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:07,646 INFO L124 PetriNetUnfolderBase]: 1335/2402 cut-off events. [2023-11-06 23:08:07,646 INFO L125 PetriNetUnfolderBase]: For 57023/57023 co-relation queries the response was YES. [2023-11-06 23:08:07,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22773 conditions, 2402 events. 1335/2402 cut-off events. For 57023/57023 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14621 event pairs, 103 based on Foata normal form. 12/2414 useless extension candidates. Maximal degree in co-relation 22145. Up to 747 conditions per place. [2023-11-06 23:08:07,683 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 284 selfloop transitions, 329 changer transitions 0/613 dead transitions. [2023-11-06 23:08:07,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 613 transitions, 12280 flow [2023-11-06 23:08:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 23:08:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 23:08:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1696 transitions. [2023-11-06 23:08:07,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430512016718913 [2023-11-06 23:08:07,687 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1696 transitions. [2023-11-06 23:08:07,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1696 transitions. [2023-11-06 23:08:07,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:07,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1696 transitions. [2023-11-06 23:08:07,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 58.48275862068966) internal successors, (1696), 29 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:07,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 132.0) internal successors, (3960), 30 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:07,698 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 132.0) internal successors, (3960), 30 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:07,699 INFO L175 Difference]: Start difference. First operand has 225 places, 450 transitions, 8399 flow. Second operand 29 states and 1696 transitions. [2023-11-06 23:08:07,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 613 transitions, 12280 flow [2023-11-06 23:08:08,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 613 transitions, 11935 flow, removed 117 selfloop flow, removed 8 redundant places. [2023-11-06 23:08:08,325 INFO L231 Difference]: Finished difference. Result has 250 places, 552 transitions, 11121 flow [2023-11-06 23:08:08,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=8162, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11121, PETRI_PLACES=250, PETRI_TRANSITIONS=552} [2023-11-06 23:08:08,326 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 230 predicate places. [2023-11-06 23:08:08,326 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 552 transitions, 11121 flow [2023-11-06 23:08:08,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.05555555555556) internal successors, (1009), 18 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:08,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:08,327 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:08,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:08,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:08,527 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:08,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash -123846945, now seen corresponding path program 16 times [2023-11-06 23:08:08,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:08,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66332911] [2023-11-06 23:08:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:08,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:08,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:08,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66332911] [2023-11-06 23:08:08,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66332911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:08,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304939869] [2023-11-06 23:08:08,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:08,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:08,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:08,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:08,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:08:08,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:08,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:08,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:08,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:08,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:08,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304939869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:08,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:08,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-06 23:08:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407279732] [2023-11-06 23:08:08,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:08,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:08:08,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:08,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:08:08,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:08:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:09,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 552 transitions, 11121 flow. Second operand has 15 states, 15 states have (on average 55.86666666666667) internal successors, (838), 15 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:09,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:09,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:10,474 INFO L124 PetriNetUnfolderBase]: 1659/2972 cut-off events. [2023-11-06 23:08:10,474 INFO L125 PetriNetUnfolderBase]: For 74394/74394 co-relation queries the response was YES. [2023-11-06 23:08:10,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29076 conditions, 2972 events. 1659/2972 cut-off events. For 74394/74394 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 18878 event pairs, 68 based on Foata normal form. 34/3006 useless extension candidates. Maximal degree in co-relation 28421. Up to 799 conditions per place. [2023-11-06 23:08:10,513 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 180 selfloop transitions, 558 changer transitions 9/747 dead transitions. [2023-11-06 23:08:10,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 747 transitions, 16043 flow [2023-11-06 23:08:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:08:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 23:08:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1519 transitions. [2023-11-06 23:08:10,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425990675990676 [2023-11-06 23:08:10,521 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1519 transitions. [2023-11-06 23:08:10,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1519 transitions. [2023-11-06 23:08:10,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:10,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1519 transitions. [2023-11-06 23:08:10,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 58.42307692307692) internal successors, (1519), 26 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 132.0) internal successors, (3564), 27 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,533 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 132.0) internal successors, (3564), 27 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,533 INFO L175 Difference]: Start difference. First operand has 250 places, 552 transitions, 11121 flow. Second operand 26 states and 1519 transitions. [2023-11-06 23:08:10,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 747 transitions, 16043 flow [2023-11-06 23:08:11,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 747 transitions, 15662 flow, removed 157 selfloop flow, removed 6 redundant places. [2023-11-06 23:08:11,226 INFO L231 Difference]: Finished difference. Result has 279 places, 693 transitions, 15386 flow [2023-11-06 23:08:11,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=10794, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15386, PETRI_PLACES=279, PETRI_TRANSITIONS=693} [2023-11-06 23:08:11,227 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 259 predicate places. [2023-11-06 23:08:11,227 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 693 transitions, 15386 flow [2023-11-06 23:08:11,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.86666666666667) internal successors, (838), 15 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:11,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:11,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:11,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:11,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:11,428 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:11,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1004159585, now seen corresponding path program 17 times [2023-11-06 23:08:11,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:11,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125661327] [2023-11-06 23:08:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:11,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125661327] [2023-11-06 23:08:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125661327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37417605] [2023-11-06 23:08:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:08:11,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:11,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:11,614 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:11,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:08:11,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:08:11,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:11,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:11,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:11,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:11,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37417605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:11,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:11,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 23:08:11,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634905175] [2023-11-06 23:08:11,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:11,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:08:11,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:08:11,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:08:12,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:12,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 693 transitions, 15386 flow. Second operand has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:12,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:12,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:12,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:14,571 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-11-06 23:08:14,571 INFO L125 PetriNetUnfolderBase]: For 125551/125551 co-relation queries the response was YES. [2023-11-06 23:08:14,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46327 conditions, 4340 events. 2423/4340 cut-off events. For 125551/125551 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 29679 event pairs, 141 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 45623. Up to 1133 conditions per place. [2023-11-06 23:08:14,638 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-11-06 23:08:14,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1094 transitions, 26074 flow [2023-11-06 23:08:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 23:08:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 23:08:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2101 transitions. [2023-11-06 23:08:14,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44212962962962965 [2023-11-06 23:08:14,643 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2101 transitions. [2023-11-06 23:08:14,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2101 transitions. [2023-11-06 23:08:14,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:14,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2101 transitions. [2023-11-06 23:08:14,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 58.361111111111114) internal successors, (2101), 36 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:14,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 132.0) internal successors, (4884), 37 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:14,655 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 132.0) internal successors, (4884), 37 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:14,655 INFO L175 Difference]: Start difference. First operand has 279 places, 693 transitions, 15386 flow. Second operand 36 states and 2101 transitions. [2023-11-06 23:08:14,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1094 transitions, 26074 flow [2023-11-06 23:08:16,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1094 transitions, 25038 flow, removed 398 selfloop flow, removed 9 redundant places. [2023-11-06 23:08:16,250 INFO L231 Difference]: Finished difference. Result has 317 places, 1021 transitions, 24880 flow [2023-11-06 23:08:16,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=14671, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24880, PETRI_PLACES=317, PETRI_TRANSITIONS=1021} [2023-11-06 23:08:16,252 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 297 predicate places. [2023-11-06 23:08:16,252 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 1021 transitions, 24880 flow [2023-11-06 23:08:16,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:16,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:16,252 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:16,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:16,453 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:16,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -532456959, now seen corresponding path program 18 times [2023-11-06 23:08:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:16,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851116511] [2023-11-06 23:08:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:16,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:16,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851116511] [2023-11-06 23:08:16,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851116511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:16,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771161764] [2023-11-06 23:08:16,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:08:16,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:16,599 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:16,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:08:16,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:08:16,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:16,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:16,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:16,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:16,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771161764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:16,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:16,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 23:08:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831157331] [2023-11-06 23:08:16,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:16,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:08:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:08:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:08:16,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:16,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1021 transitions, 24880 flow. Second operand has 20 states, 20 states have (on average 55.6) internal successors, (1112), 20 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:16,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:16,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:16,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:19,699 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-11-06 23:08:19,699 INFO L125 PetriNetUnfolderBase]: For 155705/155705 co-relation queries the response was YES. [2023-11-06 23:08:19,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50575 conditions, 4449 events. 2490/4449 cut-off events. For 155705/155705 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30230 event pairs, 691 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 49861. Up to 3951 conditions per place. [2023-11-06 23:08:19,789 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-11-06 23:08:19,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1136 transitions, 29449 flow [2023-11-06 23:08:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:08:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:08:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1762 transitions. [2023-11-06 23:08:19,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44494949494949493 [2023-11-06 23:08:19,794 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1762 transitions. [2023-11-06 23:08:19,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1762 transitions. [2023-11-06 23:08:19,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:19,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1762 transitions. [2023-11-06 23:08:19,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.733333333333334) internal successors, (1762), 30 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:19,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 132.0) internal successors, (4092), 31 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:19,806 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 132.0) internal successors, (4092), 31 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:19,806 INFO L175 Difference]: Start difference. First operand has 317 places, 1021 transitions, 24880 flow. Second operand 30 states and 1762 transitions. [2023-11-06 23:08:19,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1136 transitions, 29449 flow [2023-11-06 23:08:22,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1136 transitions, 28807 flow, removed 275 selfloop flow, removed 10 redundant places. [2023-11-06 23:08:22,218 INFO L231 Difference]: Finished difference. Result has 353 places, 1077 transitions, 26674 flow [2023-11-06 23:08:22,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=24266, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26674, PETRI_PLACES=353, PETRI_TRANSITIONS=1077} [2023-11-06 23:08:22,219 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 333 predicate places. [2023-11-06 23:08:22,219 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1077 transitions, 26674 flow [2023-11-06 23:08:22,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.6) internal successors, (1112), 20 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:22,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:22,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:22,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:22,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:08:22,420 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:22,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1207126355, now seen corresponding path program 19 times [2023-11-06 23:08:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860749495] [2023-11-06 23:08:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:22,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:22,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860749495] [2023-11-06 23:08:22,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860749495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12045950] [2023-11-06 23:08:22,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:08:22,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:22,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:22,535 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:22,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:08:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:22,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:22,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:22,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12045950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:22,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:22,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-06 23:08:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758496044] [2023-11-06 23:08:22,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:22,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:08:22,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:08:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:08:22,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:22,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1077 transitions, 26674 flow. Second operand has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:22,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:22,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:22,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:25,052 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-11-06 23:08:25,052 INFO L125 PetriNetUnfolderBase]: For 149819/149819 co-relation queries the response was YES. [2023-11-06 23:08:25,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49685 conditions, 4434 events. 2496/4434 cut-off events. For 149819/149819 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29910 event pairs, 708 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 48975. Up to 4069 conditions per place. [2023-11-06 23:08:25,137 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-11-06 23:08:25,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1115 transitions, 29529 flow [2023-11-06 23:08:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:08:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:08:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 934 transitions. [2023-11-06 23:08:25,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422348484848485 [2023-11-06 23:08:25,140 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 934 transitions. [2023-11-06 23:08:25,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 934 transitions. [2023-11-06 23:08:25,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:25,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 934 transitions. [2023-11-06 23:08:25,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.375) internal successors, (934), 16 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:25,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:25,146 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:25,146 INFO L175 Difference]: Start difference. First operand has 353 places, 1077 transitions, 26674 flow. Second operand 16 states and 934 transitions. [2023-11-06 23:08:25,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1115 transitions, 29529 flow [2023-11-06 23:08:27,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1115 transitions, 27894 flow, removed 794 selfloop flow, removed 6 redundant places. [2023-11-06 23:08:27,661 INFO L231 Difference]: Finished difference. Result has 362 places, 1090 transitions, 25755 flow [2023-11-06 23:08:27,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=25167, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25755, PETRI_PLACES=362, PETRI_TRANSITIONS=1090} [2023-11-06 23:08:27,663 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 342 predicate places. [2023-11-06 23:08:27,663 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1090 transitions, 25755 flow [2023-11-06 23:08:27,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:27,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:27,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:27,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 23:08:27,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:08:27,864 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:27,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1563604899, now seen corresponding path program 20 times [2023-11-06 23:08:27,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:27,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66521774] [2023-11-06 23:08:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:27,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:27,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:27,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66521774] [2023-11-06 23:08:27,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66521774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:27,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455035639] [2023-11-06 23:08:27,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:27,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:27,960 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:27,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:08:28,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:28,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:08:28,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:28,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455035639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:28,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:28,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-06 23:08:28,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14572141] [2023-11-06 23:08:28,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:28,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:08:28,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:08:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:08:28,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 132 [2023-11-06 23:08:28,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1090 transitions, 25755 flow. Second operand has 6 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:28,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:28,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 132 [2023-11-06 23:08:28,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:31,885 INFO L124 PetriNetUnfolderBase]: 3355/5920 cut-off events. [2023-11-06 23:08:31,885 INFO L125 PetriNetUnfolderBase]: For 172659/172669 co-relation queries the response was YES. [2023-11-06 23:08:31,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63328 conditions, 5920 events. 3355/5920 cut-off events. For 172659/172669 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42010 event pairs, 143 based on Foata normal form. 15/5932 useless extension candidates. Maximal degree in co-relation 62086. Up to 3546 conditions per place. [2023-11-06 23:08:32,002 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 994 selfloop transitions, 448 changer transitions 133/1583 dead transitions. [2023-11-06 23:08:32,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1583 transitions, 40002 flow [2023-11-06 23:08:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:08:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:08:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 447 transitions. [2023-11-06 23:08:32,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2023-11-06 23:08:32,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 447 transitions. [2023-11-06 23:08:32,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 447 transitions. [2023-11-06 23:08:32,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:32,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 447 transitions. [2023-11-06 23:08:32,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.5) internal successors, (447), 6 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:32,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:32,013 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:32,013 INFO L175 Difference]: Start difference. First operand has 362 places, 1090 transitions, 25755 flow. Second operand 6 states and 447 transitions. [2023-11-06 23:08:32,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1583 transitions, 40002 flow [2023-11-06 23:08:35,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1583 transitions, 39676 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-11-06 23:08:35,325 INFO L231 Difference]: Finished difference. Result has 361 places, 1320 transitions, 31651 flow [2023-11-06 23:08:35,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=25553, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=31651, PETRI_PLACES=361, PETRI_TRANSITIONS=1320} [2023-11-06 23:08:35,327 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 341 predicate places. [2023-11-06 23:08:35,327 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1320 transitions, 31651 flow [2023-11-06 23:08:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:35,328 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:35,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:35,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 23:08:35,533 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:35,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1666689481, now seen corresponding path program 21 times [2023-11-06 23:08:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:35,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75351398] [2023-11-06 23:08:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:35,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75351398] [2023-11-06 23:08:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75351398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416528220] [2023-11-06 23:08:35,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:35,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:35,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:35,680 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:35,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:08:35,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:08:35,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:35,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:08:35,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:35,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:35,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416528220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:35,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:35,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-06 23:08:35,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389135003] [2023-11-06 23:08:35,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:35,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:08:35,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:08:35,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:08:36,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:36,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1320 transitions, 31651 flow. Second operand has 17 states, 17 states have (on average 55.88235294117647) internal successors, (950), 17 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:36,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:36,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:36,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:40,695 INFO L124 PetriNetUnfolderBase]: 4014/7171 cut-off events. [2023-11-06 23:08:40,696 INFO L125 PetriNetUnfolderBase]: For 225832/225832 co-relation queries the response was YES. [2023-11-06 23:08:40,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81022 conditions, 7171 events. 4014/7171 cut-off events. For 225832/225832 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 52836 event pairs, 157 based on Foata normal form. 16/7187 useless extension candidates. Maximal degree in co-relation 79574. Up to 3288 conditions per place. [2023-11-06 23:08:40,821 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 1092 selfloop transitions, 639 changer transitions 33/1764 dead transitions. [2023-11-06 23:08:40,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1764 transitions, 46253 flow [2023-11-06 23:08:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:08:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:08:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 953 transitions. [2023-11-06 23:08:40,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512310606060606 [2023-11-06 23:08:40,824 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 953 transitions. [2023-11-06 23:08:40,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 953 transitions. [2023-11-06 23:08:40,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:40,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 953 transitions. [2023-11-06 23:08:40,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.5625) internal successors, (953), 16 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,830 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 132.0) internal successors, (2244), 17 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:40,830 INFO L175 Difference]: Start difference. First operand has 361 places, 1320 transitions, 31651 flow. Second operand 16 states and 953 transitions. [2023-11-06 23:08:40,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1764 transitions, 46253 flow [2023-11-06 23:08:45,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1764 transitions, 45751 flow, removed 251 selfloop flow, removed 0 redundant places. [2023-11-06 23:08:45,680 INFO L231 Difference]: Finished difference. Result has 386 places, 1631 transitions, 42562 flow [2023-11-06 23:08:45,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=31197, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=42562, PETRI_PLACES=386, PETRI_TRANSITIONS=1631} [2023-11-06 23:08:45,681 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 366 predicate places. [2023-11-06 23:08:45,681 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1631 transitions, 42562 flow [2023-11-06 23:08:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.88235294117647) internal successors, (950), 17 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:45,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:45,682 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:45,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:45,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:08:45,888 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:08:45,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:45,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1043697053, now seen corresponding path program 22 times [2023-11-06 23:08:45,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:45,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169780924] [2023-11-06 23:08:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:45,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:46,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:46,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169780924] [2023-11-06 23:08:46,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169780924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:46,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755244910] [2023-11-06 23:08:46,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:46,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:46,028 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:46,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:08:46,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:46,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:46,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:08:46,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:46,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:46,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755244910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:46,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:46,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-06 23:08:46,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748191890] [2023-11-06 23:08:46,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:08:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:08:46,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:08:46,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:08:46,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1631 transitions, 42562 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:46,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:46,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:08:46,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:53,238 INFO L124 PetriNetUnfolderBase]: 4415/7816 cut-off events. [2023-11-06 23:08:53,238 INFO L125 PetriNetUnfolderBase]: For 277810/277810 co-relation queries the response was YES. [2023-11-06 23:08:53,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92528 conditions, 7816 events. 4415/7816 cut-off events. For 277810/277810 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 57891 event pairs, 446 based on Foata normal form. 22/7838 useless extension candidates. Maximal degree in co-relation 91251. Up to 3120 conditions per place. [2023-11-06 23:08:53,364 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 1083 selfloop transitions, 827 changer transitions 2/1912 dead transitions. [2023-11-06 23:08:53,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1912 transitions, 52896 flow [2023-11-06 23:08:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:08:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:08:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1411 transitions. [2023-11-06 23:08:53,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44539141414141414 [2023-11-06 23:08:53,367 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1411 transitions. [2023-11-06 23:08:53,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1411 transitions. [2023-11-06 23:08:53,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:53,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1411 transitions. [2023-11-06 23:08:53,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 58.791666666666664) internal successors, (1411), 24 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 132.0) internal successors, (3300), 25 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,375 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 132.0) internal successors, (3300), 25 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,376 INFO L175 Difference]: Start difference. First operand has 386 places, 1631 transitions, 42562 flow. Second operand 24 states and 1411 transitions. [2023-11-06 23:08:53,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1912 transitions, 52896 flow [2023-11-06 23:08:59,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1912 transitions, 52497 flow, removed 178 selfloop flow, removed 4 redundant places. [2023-11-06 23:08:59,894 INFO L231 Difference]: Finished difference. Result has 413 places, 1802 transitions, 49591 flow [2023-11-06 23:08:59,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=42227, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=49591, PETRI_PLACES=413, PETRI_TRANSITIONS=1802} [2023-11-06 23:08:59,897 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 393 predicate places. [2023-11-06 23:08:59,897 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 1802 transitions, 49591 flow [2023-11-06 23:08:59,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:59,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:59,898 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:59,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:00,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:09:00,104 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:09:00,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1158737123, now seen corresponding path program 23 times [2023-11-06 23:09:00,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:00,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814942309] [2023-11-06 23:09:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814942309] [2023-11-06 23:09:00,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814942309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643177769] [2023-11-06 23:09:00,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:09:00,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:00,270 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:00,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:09:00,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:09:00,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:00,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:00,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:00,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643177769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:00,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:00,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:09:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228199783] [2023-11-06 23:09:00,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:00,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:09:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:09:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:09:00,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:09:00,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 1802 transitions, 49591 flow. Second operand has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:00,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:00,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:09:00,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:10,189 INFO L124 PetriNetUnfolderBase]: 4777/8458 cut-off events. [2023-11-06 23:09:10,189 INFO L125 PetriNetUnfolderBase]: For 354358/354358 co-relation queries the response was YES. [2023-11-06 23:09:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104084 conditions, 8458 events. 4777/8458 cut-off events. For 354358/354358 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 63384 event pairs, 268 based on Foata normal form. 60/8518 useless extension candidates. Maximal degree in co-relation 102661. Up to 3080 conditions per place. [2023-11-06 23:09:10,348 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 431 selfloop transitions, 1624 changer transitions 32/2087 dead transitions. [2023-11-06 23:09:10,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 2087 transitions, 60987 flow [2023-11-06 23:09:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 23:09:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 23:09:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2161 transitions. [2023-11-06 23:09:10,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246519246519245 [2023-11-06 23:09:10,353 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2161 transitions. [2023-11-06 23:09:10,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2161 transitions. [2023-11-06 23:09:10,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:10,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2161 transitions. [2023-11-06 23:09:10,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 58.4054054054054) internal successors, (2161), 37 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:10,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 132.0) internal successors, (5016), 38 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:10,366 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 132.0) internal successors, (5016), 38 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:10,366 INFO L175 Difference]: Start difference. First operand has 413 places, 1802 transitions, 49591 flow. Second operand 37 states and 2161 transitions. [2023-11-06 23:09:10,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 2087 transitions, 60987 flow [2023-11-06 23:09:16,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 2087 transitions, 60128 flow, removed 393 selfloop flow, removed 5 redundant places. [2023-11-06 23:09:16,788 INFO L231 Difference]: Finished difference. Result has 447 places, 1988 transitions, 58464 flow [2023-11-06 23:09:16,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=48920, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=58464, PETRI_PLACES=447, PETRI_TRANSITIONS=1988} [2023-11-06 23:09:16,791 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 427 predicate places. [2023-11-06 23:09:16,791 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1988 transitions, 58464 flow [2023-11-06 23:09:16,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:16,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:16,792 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:16,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:16,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:16,997 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:09:16,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1995609751, now seen corresponding path program 24 times [2023-11-06 23:09:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:16,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561865087] [2023-11-06 23:09:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:17,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:17,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561865087] [2023-11-06 23:09:17,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561865087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:17,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024699216] [2023-11-06 23:09:17,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:09:17,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:17,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:17,132 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:17,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:09:17,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 23:09:17,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:17,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:17,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:17,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:17,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024699216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:17,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:17,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:09:17,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866829513] [2023-11-06 23:09:17,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:17,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:09:17,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:17,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:09:17,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:09:17,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:09:17,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1988 transitions, 58464 flow. Second operand has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:17,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:17,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:09:17,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:26,368 INFO L124 PetriNetUnfolderBase]: 4726/8341 cut-off events. [2023-11-06 23:09:26,368 INFO L125 PetriNetUnfolderBase]: For 363463/363463 co-relation queries the response was YES. [2023-11-06 23:09:26,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107608 conditions, 8341 events. 4726/8341 cut-off events. For 363463/363463 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 62472 event pairs, 798 based on Foata normal form. 12/8353 useless extension candidates. Maximal degree in co-relation 106107. Up to 4882 conditions per place. [2023-11-06 23:09:26,528 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 761 selfloop transitions, 1280 changer transitions 2/2043 dead transitions. [2023-11-06 23:09:26,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 2043 transitions, 63047 flow [2023-11-06 23:09:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 23:09:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 23:09:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1630 transitions. [2023-11-06 23:09:26,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44101731601731603 [2023-11-06 23:09:26,532 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1630 transitions. [2023-11-06 23:09:26,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1630 transitions. [2023-11-06 23:09:26,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:26,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1630 transitions. [2023-11-06 23:09:26,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.214285714285715) internal successors, (1630), 28 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:26,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 132.0) internal successors, (3828), 29 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:26,541 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 132.0) internal successors, (3828), 29 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:26,541 INFO L175 Difference]: Start difference. First operand has 447 places, 1988 transitions, 58464 flow. Second operand 28 states and 1630 transitions. [2023-11-06 23:09:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 2043 transitions, 63047 flow [2023-11-06 23:09:34,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 2043 transitions, 58764 flow, removed 1264 selfloop flow, removed 22 redundant places. [2023-11-06 23:09:34,875 INFO L231 Difference]: Finished difference. Result has 454 places, 1988 transitions, 56805 flow [2023-11-06 23:09:34,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=54183, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=56805, PETRI_PLACES=454, PETRI_TRANSITIONS=1988} [2023-11-06 23:09:34,878 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 434 predicate places. [2023-11-06 23:09:34,878 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1988 transitions, 56805 flow [2023-11-06 23:09:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:34,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:34,878 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:34,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-06 23:09:35,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:35,079 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:09:35,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash 668109153, now seen corresponding path program 25 times [2023-11-06 23:09:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:35,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100402526] [2023-11-06 23:09:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:35,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100402526] [2023-11-06 23:09:35,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100402526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:35,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220000533] [2023-11-06 23:09:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:09:35,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:35,212 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:35,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:09:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:35,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:35,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:35,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220000533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:35,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:35,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:09:35,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948191790] [2023-11-06 23:09:35,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:35,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:09:35,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:09:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:09:35,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:09:35,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1988 transitions, 56805 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:35,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:35,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:09:35,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:44,422 INFO L124 PetriNetUnfolderBase]: 5134/9057 cut-off events. [2023-11-06 23:09:44,422 INFO L125 PetriNetUnfolderBase]: For 325800/325800 co-relation queries the response was YES. [2023-11-06 23:09:44,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112419 conditions, 9057 events. 5134/9057 cut-off events. For 325800/325800 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 68361 event pairs, 233 based on Foata normal form. 52/9109 useless extension candidates. Maximal degree in co-relation 111151. Up to 2583 conditions per place. [2023-11-06 23:09:44,595 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 710 selfloop transitions, 1521 changer transitions 14/2245 dead transitions. [2023-11-06 23:09:44,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2245 transitions, 66707 flow [2023-11-06 23:09:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 23:09:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 23:09:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2044 transitions. [2023-11-06 23:09:44,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2023-11-06 23:09:44,598 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2044 transitions. [2023-11-06 23:09:44,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2044 transitions. [2023-11-06 23:09:44,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:44,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2044 transitions. [2023-11-06 23:09:44,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 58.4) internal successors, (2044), 35 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:44,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 132.0) internal successors, (4752), 36 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:44,609 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 132.0) internal successors, (4752), 36 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:44,609 INFO L175 Difference]: Start difference. First operand has 454 places, 1988 transitions, 56805 flow. Second operand 35 states and 2044 transitions. [2023-11-06 23:09:44,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2245 transitions, 66707 flow [2023-11-06 23:09:52,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 2245 transitions, 64212 flow, removed 32 selfloop flow, removed 23 redundant places. [2023-11-06 23:09:52,411 INFO L231 Difference]: Finished difference. Result has 474 places, 2148 transitions, 63553 flow [2023-11-06 23:09:52,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=54555, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=63553, PETRI_PLACES=474, PETRI_TRANSITIONS=2148} [2023-11-06 23:09:52,413 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 454 predicate places. [2023-11-06 23:09:52,413 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 2148 transitions, 63553 flow [2023-11-06 23:09:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:52,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:52,414 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:52,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:52,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 23:09:52,615 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:09:52,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -482214147, now seen corresponding path program 26 times [2023-11-06 23:09:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624880260] [2023-11-06 23:09:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:52,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624880260] [2023-11-06 23:09:52,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624880260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627868360] [2023-11-06 23:09:52,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:52,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:52,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:52,744 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:52,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:09:52,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:52,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:52,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:52,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:52,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:53,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627868360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:53,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:53,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:09:53,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261705144] [2023-11-06 23:09:53,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:53,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:09:53,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:53,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:09:53,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:09:53,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:09:53,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 2148 transitions, 63553 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:53,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:53,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:09:53,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:03,460 INFO L124 PetriNetUnfolderBase]: 5427/9604 cut-off events. [2023-11-06 23:10:03,461 INFO L125 PetriNetUnfolderBase]: For 377092/377092 co-relation queries the response was YES. [2023-11-06 23:10:03,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122929 conditions, 9604 events. 5427/9604 cut-off events. For 377092/377092 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 73657 event pairs, 371 based on Foata normal form. 22/9626 useless extension candidates. Maximal degree in co-relation 121567. Up to 2899 conditions per place. [2023-11-06 23:10:03,673 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 1099 selfloop transitions, 1260 changer transitions 24/2383 dead transitions. [2023-11-06 23:10:03,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 2383 transitions, 73757 flow [2023-11-06 23:10:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:10:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:10:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1756 transitions. [2023-11-06 23:10:03,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44343434343434346 [2023-11-06 23:10:03,676 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1756 transitions. [2023-11-06 23:10:03,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1756 transitions. [2023-11-06 23:10:03,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:03,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1756 transitions. [2023-11-06 23:10:03,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.53333333333333) internal successors, (1756), 30 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:03,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 132.0) internal successors, (4092), 31 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:03,685 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 132.0) internal successors, (4092), 31 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:03,686 INFO L175 Difference]: Start difference. First operand has 474 places, 2148 transitions, 63553 flow. Second operand 30 states and 1756 transitions. [2023-11-06 23:10:03,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 2383 transitions, 73757 flow [2023-11-06 23:10:13,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 2383 transitions, 72627 flow, removed 332 selfloop flow, removed 18 redundant places. [2023-11-06 23:10:13,285 INFO L231 Difference]: Finished difference. Result has 493 places, 2258 transitions, 69647 flow [2023-11-06 23:10:13,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=62527, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=69647, PETRI_PLACES=493, PETRI_TRANSITIONS=2258} [2023-11-06 23:10:13,287 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 473 predicate places. [2023-11-06 23:10:13,287 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 2258 transitions, 69647 flow [2023-11-06 23:10:13,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:13,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:13,288 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:13,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-06 23:10:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 23:10:13,488 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:10:13,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1312542115, now seen corresponding path program 27 times [2023-11-06 23:10:13,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:13,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544258486] [2023-11-06 23:10:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:13,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544258486] [2023-11-06 23:10:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544258486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321762431] [2023-11-06 23:10:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:13,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:13,640 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:13,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 23:10:13,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:10:13,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:13,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:10:13,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:13,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:13,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321762431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:13,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:13,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-11-06 23:10:13,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945968835] [2023-11-06 23:10:13,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:13,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:10:13,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:10:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:10:14,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:10:14,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 2258 transitions, 69647 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:14,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:14,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:10:14,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:27,296 INFO L124 PetriNetUnfolderBase]: 6007/10640 cut-off events. [2023-11-06 23:10:27,296 INFO L125 PetriNetUnfolderBase]: For 451704/451704 co-relation queries the response was YES. [2023-11-06 23:10:27,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140631 conditions, 10640 events. 6007/10640 cut-off events. For 451704/451704 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 82882 event pairs, 282 based on Foata normal form. 28/10668 useless extension candidates. Maximal degree in co-relation 139245. Up to 2897 conditions per place. [2023-11-06 23:10:27,551 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 924 selfloop transitions, 1695 changer transitions 16/2635 dead transitions. [2023-11-06 23:10:27,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 2635 transitions, 85296 flow [2023-11-06 23:10:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:10:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 23:10:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1987 transitions. [2023-11-06 23:10:27,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427361853832442 [2023-11-06 23:10:27,555 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1987 transitions. [2023-11-06 23:10:27,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1987 transitions. [2023-11-06 23:10:27,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:27,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1987 transitions. [2023-11-06 23:10:27,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 58.44117647058823) internal successors, (1987), 34 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:27,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 132.0) internal successors, (4620), 35 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:27,563 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 132.0) internal successors, (4620), 35 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:27,563 INFO L175 Difference]: Start difference. First operand has 493 places, 2258 transitions, 69647 flow. Second operand 34 states and 1987 transitions. [2023-11-06 23:10:27,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 2635 transitions, 85296 flow [2023-11-06 23:10:42,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 2635 transitions, 84082 flow, removed 437 selfloop flow, removed 13 redundant places. [2023-11-06 23:10:42,712 INFO L231 Difference]: Finished difference. Result has 522 places, 2512 transitions, 81807 flow [2023-11-06 23:10:42,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=68711, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=81807, PETRI_PLACES=522, PETRI_TRANSITIONS=2512} [2023-11-06 23:10:42,714 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 502 predicate places. [2023-11-06 23:10:42,714 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 2512 transitions, 81807 flow [2023-11-06 23:10:42,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:42,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:42,714 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:42,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-06 23:10:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 23:10:42,915 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:10:42,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 920818825, now seen corresponding path program 28 times [2023-11-06 23:10:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199367251] [2023-11-06 23:10:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:43,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199367251] [2023-11-06 23:10:43,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199367251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805903627] [2023-11-06 23:10:43,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:10:43,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:43,064 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:43,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 23:10:43,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:10:43,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:43,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:10:43,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:43,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:43,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805903627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:43,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:43,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-06 23:10:43,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494450220] [2023-11-06 23:10:43,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:43,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:10:43,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:10:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:10:43,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:10:43,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2512 transitions, 81807 flow. Second operand has 21 states, 21 states have (on average 55.80952380952381) internal successors, (1172), 21 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:43,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:10:43,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:58,543 INFO L124 PetriNetUnfolderBase]: 6429/11412 cut-off events. [2023-11-06 23:10:58,543 INFO L125 PetriNetUnfolderBase]: For 531049/531049 co-relation queries the response was YES. [2023-11-06 23:10:58,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157062 conditions, 11412 events. 6429/11412 cut-off events. For 531049/531049 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 90629 event pairs, 527 based on Foata normal form. 10/11422 useless extension candidates. Maximal degree in co-relation 155755. Up to 3883 conditions per place. [2023-11-06 23:10:58,796 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 1410 selfloop transitions, 1413 changer transitions 0/2823 dead transitions. [2023-11-06 23:10:58,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 2823 transitions, 96047 flow [2023-11-06 23:10:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 23:10:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-06 23:10:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2451 transitions. [2023-11-06 23:10:58,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420995670995671 [2023-11-06 23:10:58,800 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2451 transitions. [2023-11-06 23:10:58,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2451 transitions. [2023-11-06 23:10:58,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:58,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2451 transitions. [2023-11-06 23:10:58,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.357142857142854) internal successors, (2451), 42 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:58,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 132.0) internal successors, (5676), 43 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:58,811 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 132.0) internal successors, (5676), 43 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:58,811 INFO L175 Difference]: Start difference. First operand has 522 places, 2512 transitions, 81807 flow. Second operand 42 states and 2451 transitions. [2023-11-06 23:10:58,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 2823 transitions, 96047 flow [2023-11-06 23:11:16,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 2823 transitions, 94937 flow, removed 459 selfloop flow, removed 10 redundant places. [2023-11-06 23:11:16,292 INFO L231 Difference]: Finished difference. Result has 557 places, 2688 transitions, 90807 flow [2023-11-06 23:11:16,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=80761, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=90807, PETRI_PLACES=557, PETRI_TRANSITIONS=2688} [2023-11-06 23:11:16,294 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 537 predicate places. [2023-11-06 23:11:16,294 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 2688 transitions, 90807 flow [2023-11-06 23:11:16,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.80952380952381) internal successors, (1172), 21 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:16,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:16,295 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:16,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-06 23:11:16,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 23:11:16,495 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:11:16,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash 863713667, now seen corresponding path program 29 times [2023-11-06 23:11:16,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:16,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964432673] [2023-11-06 23:11:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964432673] [2023-11-06 23:11:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964432673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:16,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896842721] [2023-11-06 23:11:16,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:11:16,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:16,624 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:16,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513a0aab-f792-44e7-b73b-a773dcf5d4aa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 23:11:16,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:11:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:16,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:11:16,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:16,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896842721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:16,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:16,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-11-06 23:11:16,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935508488] [2023-11-06 23:11:16,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:16,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:11:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:11:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:11:17,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 132 [2023-11-06 23:11:17,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 2688 transitions, 90807 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:17,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:17,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 132 [2023-11-06 23:11:17,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:31,589 INFO L124 PetriNetUnfolderBase]: 6771/12066 cut-off events. [2023-11-06 23:11:31,589 INFO L125 PetriNetUnfolderBase]: For 587287/587287 co-relation queries the response was YES. [2023-11-06 23:11:31,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168140 conditions, 12066 events. 6771/12066 cut-off events. For 587287/587287 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 96373 event pairs, 180 based on Foata normal form. 60/12126 useless extension candidates. Maximal degree in co-relation 166697. Up to 2903 conditions per place. [2023-11-06 23:11:31,818 INFO L140 encePairwiseOnDemand]: 126/132 looper letters, 475 selfloop transitions, 2418 changer transitions 19/2912 dead transitions. [2023-11-06 23:11:31,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 2912 transitions, 101808 flow [2023-11-06 23:11:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 23:11:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 23:11:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1867 transitions. [2023-11-06 23:11:31,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419981060606061 [2023-11-06 23:11:31,820 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1867 transitions. [2023-11-06 23:11:31,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1867 transitions. [2023-11-06 23:11:31,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:31,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1867 transitions. [2023-11-06 23:11:31,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 58.34375) internal successors, (1867), 32 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:31,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 132.0) internal successors, (4356), 33 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:31,825 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 132.0) internal successors, (4356), 33 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:31,825 INFO L175 Difference]: Start difference. First operand has 557 places, 2688 transitions, 90807 flow. Second operand 32 states and 1867 transitions. [2023-11-06 23:11:31,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 2912 transitions, 101808 flow