./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/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_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/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_b6dc06da-ea4e-48eb-89ba-a98617703721/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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:54:21,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:54:21,822 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:54:21,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:54:21,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:54:21,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:54:21,883 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:54:21,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:54:21,885 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:54:21,891 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:54:21,892 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:54:21,892 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:54:21,893 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:54:21,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:54:21,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:54:21,896 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:54:21,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:54:21,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:54:21,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:54:21,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:54:21,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:54:21,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:54:21,900 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:54:21,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:54:21,901 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:54:21,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:54:21,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:54:21,902 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:54:21,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:21,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:54:21,905 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:54:21,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:54:21,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:54:21,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:54:21,906 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:54:21,906 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:54:21,906 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:54:21,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:54:21,907 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:54:21,907 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_b6dc06da-ea4e-48eb-89ba-a98617703721/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2023-11-06 21:54:22,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:54:22,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:54:22,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:54:22,295 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:54:22,296 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:54:22,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-06 21:54:25,523 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:54:25,868 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:54:25,869 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-06 21:54:25,880 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/data/d258e4754/2b1c0b129a67430c8256cc77c5dd315c/FLAG4e4e8c370 [2023-11-06 21:54:25,908 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/data/d258e4754/2b1c0b129a67430c8256cc77c5dd315c [2023-11-06 21:54:25,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:54:25,921 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:54:25,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:25,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:54:25,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:54:25,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:25" (1/1) ... [2023-11-06 21:54:25,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a535c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:25, skipping insertion in model container [2023-11-06 21:54:25,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:25" (1/1) ... [2023-11-06 21:54:25,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:54:26,256 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_b6dc06da-ea4e-48eb-89ba-a98617703721/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-11-06 21:54:26,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:26,300 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:54:26,330 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_b6dc06da-ea4e-48eb-89ba-a98617703721/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-11-06 21:54:26,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:26,344 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:54:26,345 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:54:26,354 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:54:26,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26 WrapperNode [2023-11-06 21:54:26,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:26,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:26,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:54:26,357 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:54:26,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,409 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2023-11-06 21:54:26,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:26,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:54:26,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:54:26,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:54:26,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,452 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,456 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:54:26,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:54:26,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:54:26,479 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:54:26,480 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:26,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:54:26,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:54:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:54:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:54:26,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:54:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:54:26,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:54:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:54:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:54:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:54:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:54:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:54:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:54:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:54:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:54:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:54:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:54:26,579 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:54:26,704 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:54:26,707 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:54:27,104 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:54:27,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:54:27,281 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 21:54:27,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:27 BoogieIcfgContainer [2023-11-06 21:54:27,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:54:27,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:54:27,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:54:27,303 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:54:27,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:54:25" (1/3) ... [2023-11-06 21:54:27,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d34240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:27, skipping insertion in model container [2023-11-06 21:54:27,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26" (2/3) ... [2023-11-06 21:54:27,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d34240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:27, skipping insertion in model container [2023-11-06 21:54:27,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:27" (3/3) ... [2023-11-06 21:54:27,307 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-11-06 21:54:27,322 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:54:27,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:54:27,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:54:27,336 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:54:27,427 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:54:27,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 290 flow [2023-11-06 21:54:27,558 INFO L124 PetriNetUnfolderBase]: 11/136 cut-off events. [2023-11-06 21:54:27,559 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:54:27,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 136 events. 11/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-11-06 21:54:27,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 290 flow [2023-11-06 21:54:27,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 127 transitions, 266 flow [2023-11-06 21:54:27,576 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:54:27,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 127 transitions, 266 flow [2023-11-06 21:54:27,592 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 127 transitions, 266 flow [2023-11-06 21:54:27,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 266 flow [2023-11-06 21:54:27,649 INFO L124 PetriNetUnfolderBase]: 11/127 cut-off events. [2023-11-06 21:54:27,649 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:54:27,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 11/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 75 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-11-06 21:54:27,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 576 [2023-11-06 21:54:33,125 INFO L134 LiptonReduction]: Checked pairs total: 674 [2023-11-06 21:54:33,125 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-11-06 21:54:33,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:33,153 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;@4d4f8d8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:33,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 21:54:33,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:33,164 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 21:54:33,164 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:54:33,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:33,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:33,166 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 21:54:33,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2097574480, now seen corresponding path program 1 times [2023-11-06 21:54:33,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:33,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197495283] [2023-11-06 21:54:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:33,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:33,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197495283] [2023-11-06 21:54:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197495283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:33,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:54:33,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314910264] [2023-11-06 21:54:33,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:33,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:33,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:33,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-11-06 21:54:33,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:33,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:33,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-11-06 21:54:33,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:33,952 INFO L124 PetriNetUnfolderBase]: 43/75 cut-off events. [2023-11-06 21:54:33,953 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 21:54:33,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 75 events. 43/75 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 149 event pairs, 4 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 114. Up to 67 conditions per place. [2023-11-06 21:54:33,956 INFO L140 encePairwiseOnDemand]: 267/272 looper letters, 17 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-06 21:54:33,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 99 flow [2023-11-06 21:54:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-11-06 21:54:33,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-11-06 21:54:33,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-11-06 21:54:33,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-11-06 21:54:33,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:33,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-11-06 21:54:33,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,005 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 376 transitions. [2023-11-06 21:54:34,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 99 flow [2023-11-06 21:54:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:54:34,012 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 59 flow [2023-11-06 21:54:34,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-06 21:54:34,019 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 21:54:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 59 flow [2023-11-06 21:54:34,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:34,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:54:34,021 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 21:54:34,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2141031256, now seen corresponding path program 2 times [2023-11-06 21:54:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:34,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673654612] [2023-11-06 21:54:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:34,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:34,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673654612] [2023-11-06 21:54:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673654612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:34,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:34,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481871766] [2023-11-06 21:54:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:34,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:34,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:34,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 272 [2023-11-06 21:54:34,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:34,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 272 [2023-11-06 21:54:34,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:34,498 INFO L124 PetriNetUnfolderBase]: 37/77 cut-off events. [2023-11-06 21:54:34,499 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-06 21:54:34,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 77 events. 37/77 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 173 event pairs, 12 based on Foata normal form. 3/57 useless extension candidates. Maximal degree in co-relation 70. Up to 66 conditions per place. [2023-11-06 21:54:34,503 INFO L140 encePairwiseOnDemand]: 267/272 looper letters, 16 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-11-06 21:54:34,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 25 transitions, 119 flow [2023-11-06 21:54:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:54:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-11-06 21:54:34,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025735294117646 [2023-11-06 21:54:34,515 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-11-06 21:54:34,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-11-06 21:54:34,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:34,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-11-06 21:54:34,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,535 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,536 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 59 flow. Second operand 4 states and 479 transitions. [2023-11-06 21:54:34,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 25 transitions, 119 flow [2023-11-06 21:54:34,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:34,540 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 72 flow [2023-11-06 21:54:34,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-06 21:54:34,542 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-06 21:54:34,551 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 72 flow [2023-11-06 21:54:34,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:34,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:34,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:54:34,554 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 21:54:34,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1635604837, now seen corresponding path program 1 times [2023-11-06 21:54:34,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:34,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728282715] [2023-11-06 21:54:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:34,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:54:35,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:35,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728282715] [2023-11-06 21:54:35,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728282715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:35,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:35,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:35,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891517334] [2023-11-06 21:54:35,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:35,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:54:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:35,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:54:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:54:35,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 272 [2023-11-06 21:54:35,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 116.33333333333333) internal successors, (698), 6 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:35,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 272 [2023-11-06 21:54:35,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:35,278 INFO L124 PetriNetUnfolderBase]: 54/110 cut-off events. [2023-11-06 21:54:35,278 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 21:54:35,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 110 events. 54/110 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 299 event pairs, 14 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 290. Up to 61 conditions per place. [2023-11-06 21:54:35,281 INFO L140 encePairwiseOnDemand]: 265/272 looper letters, 30 selfloop transitions, 7 changer transitions 2/40 dead transitions. [2023-11-06 21:54:35,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 40 transitions, 208 flow [2023-11-06 21:54:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:54:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 723 transitions. [2023-11-06 21:54:35,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430147058823529 [2023-11-06 21:54:35,286 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 723 transitions. [2023-11-06 21:54:35,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 723 transitions. [2023-11-06 21:54:35,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:35,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 723 transitions. [2023-11-06 21:54:35,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,296 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,296 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 72 flow. Second operand 6 states and 723 transitions. [2023-11-06 21:54:35,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 40 transitions, 208 flow [2023-11-06 21:54:35,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 200 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:35,299 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 92 flow [2023-11-06 21:54:35,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-06 21:54:35,302 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-11-06 21:54:35,305 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 92 flow [2023-11-06 21:54:35,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 116.33333333333333) internal successors, (698), 6 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:35,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:35,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:54:35,308 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 21:54:35,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:35,309 INFO L85 PathProgramCache]: Analyzing trace with hash 146761794, now seen corresponding path program 1 times [2023-11-06 21:54:35,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:35,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937299568] [2023-11-06 21:54:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:35,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:35,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:35,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937299568] [2023-11-06 21:54:35,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937299568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:35,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803512642] [2023-11-06 21:54:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:35,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:35,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:35,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:35,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:54:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:35,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:54:35,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:54:35,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:35,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803512642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:35,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:54:35,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 21:54:35,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846231229] [2023-11-06 21:54:35,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:35,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:35,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:54:35,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-11-06 21:54:35,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:35,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-11-06 21:54:35,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:35,946 INFO L124 PetriNetUnfolderBase]: 87/181 cut-off events. [2023-11-06 21:54:35,947 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-06 21:54:35,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 181 events. 87/181 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 621 event pairs, 12 based on Foata normal form. 12/165 useless extension candidates. Maximal degree in co-relation 508. Up to 109 conditions per place. [2023-11-06 21:54:35,953 INFO L140 encePairwiseOnDemand]: 267/272 looper letters, 30 selfloop transitions, 9 changer transitions 2/43 dead transitions. [2023-11-06 21:54:35,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 244 flow [2023-11-06 21:54:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:54:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-11-06 21:54:35,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678308823529412 [2023-11-06 21:54:35,957 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-11-06 21:54:35,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-11-06 21:54:35,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:35,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-11-06 21:54:35,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,965 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,965 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 92 flow. Second operand 4 states and 509 transitions. [2023-11-06 21:54:35,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 244 flow [2023-11-06 21:54:35,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 237 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:35,972 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 151 flow [2023-11-06 21:54:35,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-11-06 21:54:35,975 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-11-06 21:54:35,975 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 151 flow [2023-11-06 21:54:35,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:35,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:35,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:36,190 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 21:54:36,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1010332857, now seen corresponding path program 1 times [2023-11-06 21:54:36,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406237739] [2023-11-06 21:54:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406237739] [2023-11-06 21:54:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406237739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:36,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14768913] [2023-11-06 21:54:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:36,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:36,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:36,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:36,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:54:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:36,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:54:36,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:36,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:36,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14768913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:36,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:36,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 21:54:36,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145577510] [2023-11-06 21:54:36,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:36,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:54:36,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:54:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:54:36,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 272 [2023-11-06 21:54:36,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 151 flow. Second operand has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:36,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:36,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 272 [2023-11-06 21:54:36,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:37,133 INFO L124 PetriNetUnfolderBase]: 82/182 cut-off events. [2023-11-06 21:54:37,133 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-06 21:54:37,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 182 events. 82/182 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 600 event pairs, 36 based on Foata normal form. 8/161 useless extension candidates. Maximal degree in co-relation 675. Up to 158 conditions per place. [2023-11-06 21:54:37,138 INFO L140 encePairwiseOnDemand]: 267/272 looper letters, 23 selfloop transitions, 3 changer transitions 11/39 dead transitions. [2023-11-06 21:54:37,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 276 flow [2023-11-06 21:54:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:54:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 690 transitions. [2023-11-06 21:54:37,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227941176470588 [2023-11-06 21:54:37,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 690 transitions. [2023-11-06 21:54:37,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 690 transitions. [2023-11-06 21:54:37,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:37,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 690 transitions. [2023-11-06 21:54:37,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:37,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:37,152 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:37,152 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 151 flow. Second operand 6 states and 690 transitions. [2023-11-06 21:54:37,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 276 flow [2023-11-06 21:54:37,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 260 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:37,162 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 165 flow [2023-11-06 21:54:37,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-06 21:54:37,165 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-11-06 21:54:37,169 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 165 flow [2023-11-06 21:54:37,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:37,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:37,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:37,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:37,378 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 21:54:37,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -449513150, now seen corresponding path program 2 times [2023-11-06 21:54:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105484424] [2023-11-06 21:54:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:38,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:38,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105484424] [2023-11-06 21:54:38,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105484424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:38,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586273561] [2023-11-06 21:54:38,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:38,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:38,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:38,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:38,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:54:38,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:38,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:54:38,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:38,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 21:54:38,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:54:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:38,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:39,150 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:39,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-06 21:54:39,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-06 21:54:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:39,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586273561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:39,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:39,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 21:54:39,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562242658] [2023-11-06 21:54:39,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 21:54:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 21:54:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:54:40,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 272 [2023-11-06 21:54:40,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 165 flow. Second operand has 23 states, 23 states have (on average 99.6086956521739) internal successors, (2291), 23 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:40,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:40,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 272 [2023-11-06 21:54:40,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:42,836 INFO L124 PetriNetUnfolderBase]: 241/512 cut-off events. [2023-11-06 21:54:42,836 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2023-11-06 21:54:42,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 conditions, 512 events. 241/512 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2467 event pairs, 24 based on Foata normal form. 24/443 useless extension candidates. Maximal degree in co-relation 1922. Up to 205 conditions per place. [2023-11-06 21:54:42,843 INFO L140 encePairwiseOnDemand]: 264/272 looper letters, 94 selfloop transitions, 49 changer transitions 1/146 dead transitions. [2023-11-06 21:54:42,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 146 transitions, 1045 flow [2023-11-06 21:54:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:54:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:54:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2174 transitions. [2023-11-06 21:54:42,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806022408963585 [2023-11-06 21:54:42,857 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2174 transitions. [2023-11-06 21:54:42,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2174 transitions. [2023-11-06 21:54:42,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:42,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2174 transitions. [2023-11-06 21:54:42,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 103.52380952380952) internal successors, (2174), 21 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 272.0) internal successors, (5984), 22 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,886 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 272.0) internal successors, (5984), 22 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,887 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 165 flow. Second operand 21 states and 2174 transitions. [2023-11-06 21:54:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 146 transitions, 1045 flow [2023-11-06 21:54:42,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 146 transitions, 987 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-06 21:54:42,895 INFO L231 Difference]: Finished difference. Result has 58 places, 74 transitions, 678 flow [2023-11-06 21:54:42,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=678, PETRI_PLACES=58, PETRI_TRANSITIONS=74} [2023-11-06 21:54:42,897 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-11-06 21:54:42,897 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 74 transitions, 678 flow [2023-11-06 21:54:42,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 99.6086956521739) internal successors, (2291), 23 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:42,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:42,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:43,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:43,107 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 21:54:43,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash 396928780, now seen corresponding path program 3 times [2023-11-06 21:54:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:43,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90047892] [2023-11-06 21:54:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:43,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:43,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90047892] [2023-11-06 21:54:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90047892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719772691] [2023-11-06 21:54:43,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:43,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:43,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:43,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:43,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:54:44,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:54:44,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:44,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:54:44,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:44,235 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 21:54:44,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:44,380 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 21:54:44,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-06 21:54:44,684 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 21:54:44,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719772691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:44,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:44,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 18 [2023-11-06 21:54:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855308604] [2023-11-06 21:54:44,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:44,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:54:44,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:44,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:54:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:54:45,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 272 [2023-11-06 21:54:45,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 678 flow. Second operand has 19 states, 19 states have (on average 103.94736842105263) internal successors, (1975), 19 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:45,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:45,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 272 [2023-11-06 21:54:45,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:46,542 INFO L124 PetriNetUnfolderBase]: 364/753 cut-off events. [2023-11-06 21:54:46,543 INFO L125 PetriNetUnfolderBase]: For 3210/3210 co-relation queries the response was YES. [2023-11-06 21:54:46,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 753 events. 364/753 cut-off events. For 3210/3210 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3994 event pairs, 39 based on Foata normal form. 22/711 useless extension candidates. Maximal degree in co-relation 3200. Up to 441 conditions per place. [2023-11-06 21:54:46,555 INFO L140 encePairwiseOnDemand]: 264/272 looper letters, 112 selfloop transitions, 54 changer transitions 8/176 dead transitions. [2023-11-06 21:54:46,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 176 transitions, 1786 flow [2023-11-06 21:54:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:54:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:54:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1942 transitions. [2023-11-06 21:54:46,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966503267973856 [2023-11-06 21:54:46,568 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1942 transitions. [2023-11-06 21:54:46,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1942 transitions. [2023-11-06 21:54:46,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:46,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1942 transitions. [2023-11-06 21:54:46,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 107.88888888888889) internal successors, (1942), 18 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,595 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,596 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 678 flow. Second operand 18 states and 1942 transitions. [2023-11-06 21:54:46,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 176 transitions, 1786 flow [2023-11-06 21:54:46,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 176 transitions, 1684 flow, removed 47 selfloop flow, removed 4 redundant places. [2023-11-06 21:54:46,632 INFO L231 Difference]: Finished difference. Result has 79 places, 115 transitions, 1272 flow [2023-11-06 21:54:46,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1272, PETRI_PLACES=79, PETRI_TRANSITIONS=115} [2023-11-06 21:54:46,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-11-06 21:54:46,634 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 115 transitions, 1272 flow [2023-11-06 21:54:46,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 103.94736842105263) internal successors, (1975), 19 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:46,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:46,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:46,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:54:46,843 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 21:54:46,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:46,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1448978578, now seen corresponding path program 4 times [2023-11-06 21:54:46,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:46,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535728611] [2023-11-06 21:54:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:47,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:47,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535728611] [2023-11-06 21:54:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535728611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411154544] [2023-11-06 21:54:47,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:54:47,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:47,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:47,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:47,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:54:47,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:54:47,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:47,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:54:47,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:47,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 21:54:48,286 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 21:54:48,416 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 21:54:48,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:48,604 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:48,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-06 21:54:48,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-06 21:54:48,954 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 21:54:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411154544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:48,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-06 21:54:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519616327] [2023-11-06 21:54:48,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 21:54:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 21:54:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=365, Unknown=3, NotChecked=0, Total=462 [2023-11-06 21:54:50,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 272 [2023-11-06 21:54:50,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 115 transitions, 1272 flow. Second operand has 22 states, 22 states have (on average 95.68181818181819) internal successors, (2105), 22 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:50,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:50,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 272 [2023-11-06 21:54:50,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:51,349 INFO L124 PetriNetUnfolderBase]: 341/701 cut-off events. [2023-11-06 21:54:51,349 INFO L125 PetriNetUnfolderBase]: For 5480/5482 co-relation queries the response was YES. [2023-11-06 21:54:51,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4257 conditions, 701 events. 341/701 cut-off events. For 5480/5482 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3535 event pairs, 38 based on Foata normal form. 42/729 useless extension candidates. Maximal degree in co-relation 3985. Up to 446 conditions per place. [2023-11-06 21:54:51,361 INFO L140 encePairwiseOnDemand]: 264/272 looper letters, 115 selfloop transitions, 40 changer transitions 4/161 dead transitions. [2023-11-06 21:54:51,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 161 transitions, 1893 flow [2023-11-06 21:54:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:54:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:54:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1783 transitions. [2023-11-06 21:54:51,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641748366013072 [2023-11-06 21:54:51,370 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1783 transitions. [2023-11-06 21:54:51,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1783 transitions. [2023-11-06 21:54:51,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:51,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1783 transitions. [2023-11-06 21:54:51,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 99.05555555555556) internal successors, (1783), 18 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,388 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,389 INFO L175 Difference]: Start difference. First operand has 79 places, 115 transitions, 1272 flow. Second operand 18 states and 1783 transitions. [2023-11-06 21:54:51,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 161 transitions, 1893 flow [2023-11-06 21:54:51,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 161 transitions, 1745 flow, removed 69 selfloop flow, removed 6 redundant places. [2023-11-06 21:54:51,419 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 1224 flow [2023-11-06 21:54:51,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1224, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2023-11-06 21:54:51,423 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2023-11-06 21:54:51,423 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 1224 flow [2023-11-06 21:54:51,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 95.68181818181819) internal successors, (2105), 22 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:51,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:51,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:51,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:51,631 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 21:54:51,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash -936612713, now seen corresponding path program 1 times [2023-11-06 21:54:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:51,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122364576] [2023-11-06 21:54:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:52,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:52,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122364576] [2023-11-06 21:54:52,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122364576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:52,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773852439] [2023-11-06 21:54:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:52,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:52,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:52,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:52,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:54:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:52,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 21:54:52,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:53,185 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 21:54:53,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-06 21:54:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:53,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:53,444 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:53,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 21:54:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:53,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773852439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:53,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:53,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921140352] [2023-11-06 21:54:53,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:53,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:55,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 272 [2023-11-06 21:54:55,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 1224 flow. Second operand has 25 states, 25 states have (on average 95.92) internal successors, (2398), 25 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:55,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:55,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 272 [2023-11-06 21:54:55,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:57,251 INFO L124 PetriNetUnfolderBase]: 371/776 cut-off events. [2023-11-06 21:54:57,251 INFO L125 PetriNetUnfolderBase]: For 5693/5693 co-relation queries the response was YES. [2023-11-06 21:54:57,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4654 conditions, 776 events. 371/776 cut-off events. For 5693/5693 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4114 event pairs, 45 based on Foata normal form. 5/769 useless extension candidates. Maximal degree in co-relation 4316. Up to 526 conditions per place. [2023-11-06 21:54:57,264 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 117 selfloop transitions, 44 changer transitions 6/168 dead transitions. [2023-11-06 21:54:57,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 168 transitions, 1963 flow [2023-11-06 21:54:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:54:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 21:54:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1591 transitions. [2023-11-06 21:54:57,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655790441176471 [2023-11-06 21:54:57,272 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1591 transitions. [2023-11-06 21:54:57,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1591 transitions. [2023-11-06 21:54:57,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:57,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1591 transitions. [2023-11-06 21:54:57,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 99.4375) internal successors, (1591), 16 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:57,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 272.0) internal successors, (4624), 17 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:57,289 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 272.0) internal successors, (4624), 17 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:57,289 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 1224 flow. Second operand 16 states and 1591 transitions. [2023-11-06 21:54:57,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 168 transitions, 1963 flow [2023-11-06 21:54:57,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 168 transitions, 1828 flow, removed 34 selfloop flow, removed 13 redundant places. [2023-11-06 21:54:57,325 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1426 flow [2023-11-06 21:54:57,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1426, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2023-11-06 21:54:57,326 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 76 predicate places. [2023-11-06 21:54:57,326 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1426 flow [2023-11-06 21:54:57,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.92) internal successors, (2398), 25 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:57,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:57,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:57,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:57,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:57,534 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 21:54:57,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash 788797495, now seen corresponding path program 2 times [2023-11-06 21:54:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:57,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719149736] [2023-11-06 21:54:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719149736] [2023-11-06 21:54:58,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719149736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635318647] [2023-11-06 21:54:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:58,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:58,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:54:58,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:58,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:54:58,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:54:58,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:58,866 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:58,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 21:54:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:54:58,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635318647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:58,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:58,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 18 [2023-11-06 21:54:58,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156711470] [2023-11-06 21:54:58,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:58,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:54:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:54:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:55:00,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 272 [2023-11-06 21:55:00,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1426 flow. Second operand has 20 states, 20 states have (on average 97.0) internal successors, (1940), 20 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:00,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:00,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 272 [2023-11-06 21:55:00,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:01,096 INFO L124 PetriNetUnfolderBase]: 379/801 cut-off events. [2023-11-06 21:55:01,096 INFO L125 PetriNetUnfolderBase]: For 6680/6680 co-relation queries the response was YES. [2023-11-06 21:55:01,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4877 conditions, 801 events. 379/801 cut-off events. For 6680/6680 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4373 event pairs, 93 based on Foata normal form. 2/788 useless extension candidates. Maximal degree in co-relation 4485. Up to 634 conditions per place. [2023-11-06 21:55:01,111 INFO L140 encePairwiseOnDemand]: 263/272 looper letters, 115 selfloop transitions, 31 changer transitions 16/163 dead transitions. [2023-11-06 21:55:01,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 163 transitions, 1954 flow [2023-11-06 21:55:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:55:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 21:55:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1693 transitions. [2023-11-06 21:55:01,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661332179930796 [2023-11-06 21:55:01,123 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1693 transitions. [2023-11-06 21:55:01,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1693 transitions. [2023-11-06 21:55:01,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:01,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1693 transitions. [2023-11-06 21:55:01,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.58823529411765) internal successors, (1693), 17 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:01,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 272.0) internal successors, (4896), 18 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:01,155 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 272.0) internal successors, (4896), 18 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:01,155 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1426 flow. Second operand 17 states and 1693 transitions. [2023-11-06 21:55:01,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 163 transitions, 1954 flow [2023-11-06 21:55:01,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 163 transitions, 1882 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-06 21:55:01,206 INFO L231 Difference]: Finished difference. Result has 112 places, 123 transitions, 1451 flow [2023-11-06 21:55:01,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1451, PETRI_PLACES=112, PETRI_TRANSITIONS=123} [2023-11-06 21:55:01,208 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 91 predicate places. [2023-11-06 21:55:01,209 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 123 transitions, 1451 flow [2023-11-06 21:55:01,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.0) internal successors, (1940), 20 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:01,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:01,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:01,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 21:55:01,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:01,417 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 21:55:01,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash 734517653, now seen corresponding path program 3 times [2023-11-06 21:55:01,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:01,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498750256] [2023-11-06 21:55:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:01,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:02,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498750256] [2023-11-06 21:55:02,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498750256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:02,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828999878] [2023-11-06 21:55:02,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:55:02,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:02,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:02,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:02,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:55:02,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:55:02,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:02,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 21:55:02,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:02,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 21:55:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:03,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:03,302 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:03,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-06 21:55:03,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 21:55:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828999878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:03,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:03,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-11-06 21:55:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182456046] [2023-11-06 21:55:03,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:03,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:55:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:55:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=705, Unknown=1, NotChecked=0, Total=812 [2023-11-06 21:55:05,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:55:05,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 123 transitions, 1451 flow. Second operand has 29 states, 29 states have (on average 76.65517241379311) internal successors, (2223), 29 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:05,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:05,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:55:05,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:08,357 INFO L124 PetriNetUnfolderBase]: 503/1055 cut-off events. [2023-11-06 21:55:08,358 INFO L125 PetriNetUnfolderBase]: For 8875/8875 co-relation queries the response was YES. [2023-11-06 21:55:08,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6520 conditions, 1055 events. 503/1055 cut-off events. For 8875/8875 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6106 event pairs, 41 based on Foata normal form. 8/1050 useless extension candidates. Maximal degree in co-relation 6388. Up to 585 conditions per place. [2023-11-06 21:55:08,377 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 166 selfloop transitions, 68 changer transitions 25/260 dead transitions. [2023-11-06 21:55:08,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 260 transitions, 3062 flow [2023-11-06 21:55:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:55:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:55:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2476 transitions. [2023-11-06 21:55:08,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29364326375711575 [2023-11-06 21:55:08,390 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2476 transitions. [2023-11-06 21:55:08,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2476 transitions. [2023-11-06 21:55:08,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:08,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2476 transitions. [2023-11-06 21:55:08,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 79.87096774193549) internal successors, (2476), 31 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 272.0) internal successors, (8704), 32 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,419 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 272.0) internal successors, (8704), 32 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,419 INFO L175 Difference]: Start difference. First operand has 112 places, 123 transitions, 1451 flow. Second operand 31 states and 2476 transitions. [2023-11-06 21:55:08,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 260 transitions, 3062 flow [2023-11-06 21:55:08,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 260 transitions, 2984 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-11-06 21:55:08,484 INFO L231 Difference]: Finished difference. Result has 137 places, 144 transitions, 1905 flow [2023-11-06 21:55:08,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1905, PETRI_PLACES=137, PETRI_TRANSITIONS=144} [2023-11-06 21:55:08,487 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-11-06 21:55:08,487 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 144 transitions, 1905 flow [2023-11-06 21:55:08,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.65517241379311) internal successors, (2223), 29 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:08,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:08,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:08,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:08,698 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 21:55:08,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1296353123, now seen corresponding path program 4 times [2023-11-06 21:55:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303509854] [2023-11-06 21:55:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:08,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:09,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303509854] [2023-11-06 21:55:09,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303509854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107186513] [2023-11-06 21:55:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:55:09,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:09,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:09,675 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:09,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:55:09,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:55:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:09,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 21:55:09,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:10,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 21:55:10,275 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:10,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2023-11-06 21:55:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:10,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:11,000 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:11,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 63 [2023-11-06 21:55:11,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-06 21:55:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107186513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:11,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-11-06 21:55:11,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205669716] [2023-11-06 21:55:11,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 21:55:11,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 21:55:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=823, Unknown=1, NotChecked=0, Total=930 [2023-11-06 21:55:12,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:55:12,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 144 transitions, 1905 flow. Second operand has 31 states, 31 states have (on average 76.58064516129032) internal successors, (2374), 31 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:12,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:12,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:55:12,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:18,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:55:19,713 INFO L124 PetriNetUnfolderBase]: 510/1070 cut-off events. [2023-11-06 21:55:19,713 INFO L125 PetriNetUnfolderBase]: For 11481/11481 co-relation queries the response was YES. [2023-11-06 21:55:19,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7103 conditions, 1070 events. 510/1070 cut-off events. For 11481/11481 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6042 event pairs, 118 based on Foata normal form. 3/1064 useless extension candidates. Maximal degree in co-relation 6835. Up to 750 conditions per place. [2023-11-06 21:55:19,734 INFO L140 encePairwiseOnDemand]: 263/272 looper letters, 146 selfloop transitions, 51 changer transitions 27/225 dead transitions. [2023-11-06 21:55:19,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 225 transitions, 3029 flow [2023-11-06 21:55:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:55:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 21:55:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1751 transitions. [2023-11-06 21:55:19,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29261363636363635 [2023-11-06 21:55:19,739 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1751 transitions. [2023-11-06 21:55:19,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1751 transitions. [2023-11-06 21:55:19,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:19,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1751 transitions. [2023-11-06 21:55:19,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.5909090909091) internal successors, (1751), 22 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:19,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 272.0) internal successors, (6256), 23 states have internal predecessors, (6256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:19,755 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 272.0) internal successors, (6256), 23 states have internal predecessors, (6256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:19,755 INFO L175 Difference]: Start difference. First operand has 137 places, 144 transitions, 1905 flow. Second operand 22 states and 1751 transitions. [2023-11-06 21:55:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 225 transitions, 3029 flow [2023-11-06 21:55:19,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 225 transitions, 2843 flow, removed 54 selfloop flow, removed 16 redundant places. [2023-11-06 21:55:19,826 INFO L231 Difference]: Finished difference. Result has 148 places, 162 transitions, 2212 flow [2023-11-06 21:55:19,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2212, PETRI_PLACES=148, PETRI_TRANSITIONS=162} [2023-11-06 21:55:19,827 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-11-06 21:55:19,828 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 162 transitions, 2212 flow [2023-11-06 21:55:19,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 76.58064516129032) internal successors, (2374), 31 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:19,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:19,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:19,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:20,034 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 21:55:20,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash 693345117, now seen corresponding path program 5 times [2023-11-06 21:55:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:20,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802561211] [2023-11-06 21:55:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:20,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802561211] [2023-11-06 21:55:20,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802561211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:20,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111131408] [2023-11-06 21:55:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:55:20,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:20,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:20,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:55:21,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:55:21,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:21,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:55:21,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:21,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:21,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:55:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:55:21,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:21,313 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:21,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-06 21:55:21,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-06 21:55:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:21,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111131408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:21,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:21,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-11-06 21:55:21,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795365825] [2023-11-06 21:55:21,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:55:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:55:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=319, Unknown=5, NotChecked=0, Total=380 [2023-11-06 21:55:21,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 272 [2023-11-06 21:55:21,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 162 transitions, 2212 flow. Second operand has 20 states, 20 states have (on average 90.8) internal successors, (1816), 20 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:21,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:21,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 272 [2023-11-06 21:55:21,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:22,747 INFO L124 PetriNetUnfolderBase]: 511/1043 cut-off events. [2023-11-06 21:55:22,747 INFO L125 PetriNetUnfolderBase]: For 10583/10585 co-relation queries the response was YES. [2023-11-06 21:55:22,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7136 conditions, 1043 events. 511/1043 cut-off events. For 10583/10585 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5662 event pairs, 50 based on Foata normal form. 28/1060 useless extension candidates. Maximal degree in co-relation 6976. Up to 762 conditions per place. [2023-11-06 21:55:22,769 INFO L140 encePairwiseOnDemand]: 265/272 looper letters, 150 selfloop transitions, 48 changer transitions 0/202 dead transitions. [2023-11-06 21:55:22,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 202 transitions, 2987 flow [2023-11-06 21:55:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:55:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 21:55:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1120 transitions. [2023-11-06 21:55:22,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3431372549019608 [2023-11-06 21:55:22,776 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1120 transitions. [2023-11-06 21:55:22,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1120 transitions. [2023-11-06 21:55:22,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:22,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1120 transitions. [2023-11-06 21:55:22,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.33333333333333) internal successors, (1120), 12 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 272.0) internal successors, (3536), 13 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,788 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 272.0) internal successors, (3536), 13 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,789 INFO L175 Difference]: Start difference. First operand has 148 places, 162 transitions, 2212 flow. Second operand 12 states and 1120 transitions. [2023-11-06 21:55:22,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 202 transitions, 2987 flow [2023-11-06 21:55:22,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 202 transitions, 2774 flow, removed 88 selfloop flow, removed 13 redundant places. [2023-11-06 21:55:22,871 INFO L231 Difference]: Finished difference. Result has 140 places, 174 transitions, 2310 flow [2023-11-06 21:55:22,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2310, PETRI_PLACES=140, PETRI_TRANSITIONS=174} [2023-11-06 21:55:22,873 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2023-11-06 21:55:22,873 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 174 transitions, 2310 flow [2023-11-06 21:55:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.8) internal successors, (1816), 20 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:22,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:22,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:23,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:55:23,080 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 21:55:23,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2122723167, now seen corresponding path program 5 times [2023-11-06 21:55:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:23,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776373875] [2023-11-06 21:55:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:23,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776373875] [2023-11-06 21:55:23,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776373875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554610700] [2023-11-06 21:55:23,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:55:23,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:23,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:23,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:23,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:55:24,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:24,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:24,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 21:55:24,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:24,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 21:55:24,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:55:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:24,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:55:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:24,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:25,268 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:25,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-11-06 21:55:25,290 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:25,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 100 [2023-11-06 21:55:25,310 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:25,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2023-11-06 21:55:25,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 21:55:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554610700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:25,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:25,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-11-06 21:55:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237787049] [2023-11-06 21:55:25,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:25,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:55:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:55:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=708, Unknown=8, NotChecked=0, Total=812 [2023-11-06 21:55:28,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 272 [2023-11-06 21:55:28,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 174 transitions, 2310 flow. Second operand has 29 states, 29 states have (on average 73.6896551724138) internal successors, (2137), 29 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:28,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:28,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 272 [2023-11-06 21:55:28,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:31,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:55:34,216 INFO L124 PetriNetUnfolderBase]: 534/1101 cut-off events. [2023-11-06 21:55:34,216 INFO L125 PetriNetUnfolderBase]: For 12713/12713 co-relation queries the response was YES. [2023-11-06 21:55:34,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7285 conditions, 1101 events. 534/1101 cut-off events. For 12713/12713 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6123 event pairs, 112 based on Foata normal form. 4/1095 useless extension candidates. Maximal degree in co-relation 6951. Up to 749 conditions per place. [2023-11-06 21:55:34,240 INFO L140 encePairwiseOnDemand]: 260/272 looper letters, 151 selfloop transitions, 66 changer transitions 33/251 dead transitions. [2023-11-06 21:55:34,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 251 transitions, 3346 flow [2023-11-06 21:55:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:55:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:55:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2278 transitions. [2023-11-06 21:55:34,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2791666666666667 [2023-11-06 21:55:34,247 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2278 transitions. [2023-11-06 21:55:34,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2278 transitions. [2023-11-06 21:55:34,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:34,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2278 transitions. [2023-11-06 21:55:34,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 75.93333333333334) internal successors, (2278), 30 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:34,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 272.0) internal successors, (8432), 31 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:34,270 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 272.0) internal successors, (8432), 31 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:34,270 INFO L175 Difference]: Start difference. First operand has 140 places, 174 transitions, 2310 flow. Second operand 30 states and 2278 transitions. [2023-11-06 21:55:34,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 251 transitions, 3346 flow [2023-11-06 21:55:34,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 251 transitions, 3247 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-06 21:55:34,366 INFO L231 Difference]: Finished difference. Result has 170 places, 179 transitions, 2454 flow [2023-11-06 21:55:34,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2454, PETRI_PLACES=170, PETRI_TRANSITIONS=179} [2023-11-06 21:55:34,368 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2023-11-06 21:55:34,368 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 179 transitions, 2454 flow [2023-11-06 21:55:34,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.6896551724138) internal successors, (2137), 29 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:34,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:34,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:34,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:34,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:55:34,576 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 21:55:34,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:34,577 INFO L85 PathProgramCache]: Analyzing trace with hash -655885276, now seen corresponding path program 6 times [2023-11-06 21:55:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:34,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786061093] [2023-11-06 21:55:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:35,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:35,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786061093] [2023-11-06 21:55:35,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786061093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:35,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312345402] [2023-11-06 21:55:35,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:55:35,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:35,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:35,928 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:35,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:55:36,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:55:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:36,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 21:55:36,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:36,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 21:55:36,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:55:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:55:36,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:36,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:36,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-06 21:55:36,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 21:55:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312345402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:36,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:36,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 22 [2023-11-06 21:55:36,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263596650] [2023-11-06 21:55:36,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:36,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:55:36,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:55:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=483, Unknown=2, NotChecked=0, Total=552 [2023-11-06 21:55:39,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:55:40,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:55:40,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 179 transitions, 2454 flow. Second operand has 24 states, 24 states have (on average 76.875) internal successors, (1845), 24 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:40,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:40,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:55:40,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:41,368 INFO L124 PetriNetUnfolderBase]: 522/1077 cut-off events. [2023-11-06 21:55:41,368 INFO L125 PetriNetUnfolderBase]: For 12764/12764 co-relation queries the response was YES. [2023-11-06 21:55:41,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7571 conditions, 1077 events. 522/1077 cut-off events. For 12764/12764 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5866 event pairs, 46 based on Foata normal form. 2/1065 useless extension candidates. Maximal degree in co-relation 7399. Up to 766 conditions per place. [2023-11-06 21:55:41,391 INFO L140 encePairwiseOnDemand]: 263/272 looper letters, 153 selfloop transitions, 69 changer transitions 14/237 dead transitions. [2023-11-06 21:55:41,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 237 transitions, 3369 flow [2023-11-06 21:55:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:55:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:55:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1663 transitions. [2023-11-06 21:55:41,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2911414565826331 [2023-11-06 21:55:41,396 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1663 transitions. [2023-11-06 21:55:41,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1663 transitions. [2023-11-06 21:55:41,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:41,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1663 transitions. [2023-11-06 21:55:41,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 79.19047619047619) internal successors, (1663), 21 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 272.0) internal successors, (5984), 22 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,409 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 272.0) internal successors, (5984), 22 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,410 INFO L175 Difference]: Start difference. First operand has 170 places, 179 transitions, 2454 flow. Second operand 21 states and 1663 transitions. [2023-11-06 21:55:41,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 237 transitions, 3369 flow [2023-11-06 21:55:41,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 237 transitions, 3223 flow, removed 31 selfloop flow, removed 23 redundant places. [2023-11-06 21:55:41,526 INFO L231 Difference]: Finished difference. Result has 160 places, 190 transitions, 2668 flow [2023-11-06 21:55:41,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2668, PETRI_PLACES=160, PETRI_TRANSITIONS=190} [2023-11-06 21:55:41,528 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2023-11-06 21:55:41,529 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 190 transitions, 2668 flow [2023-11-06 21:55:41,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.875) internal successors, (1845), 24 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:41,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:41,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:41,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:55:41,743 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 21:55:41,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:41,743 INFO L85 PathProgramCache]: Analyzing trace with hash 638511522, now seen corresponding path program 7 times [2023-11-06 21:55:41,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:41,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056471267] [2023-11-06 21:55:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:42,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:42,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056471267] [2023-11-06 21:55:42,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056471267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:42,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561198219] [2023-11-06 21:55:42,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:55:42,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:42,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:42,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:55:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:42,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:55:42,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:55:42,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:42,871 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 21:55:42,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-11-06 21:55:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561198219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:42,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:42,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 18 [2023-11-06 21:55:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927884182] [2023-11-06 21:55:42,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:55:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:55:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:55:44,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 272 [2023-11-06 21:55:44,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 190 transitions, 2668 flow. Second operand has 19 states, 19 states have (on average 105.94736842105263) internal successors, (2013), 19 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:44,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:44,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 272 [2023-11-06 21:55:44,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:46,459 INFO L124 PetriNetUnfolderBase]: 914/1800 cut-off events. [2023-11-06 21:55:46,459 INFO L125 PetriNetUnfolderBase]: For 31247/31251 co-relation queries the response was YES. [2023-11-06 21:55:46,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13379 conditions, 1800 events. 914/1800 cut-off events. For 31247/31251 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10950 event pairs, 48 based on Foata normal form. 130/1921 useless extension candidates. Maximal degree in co-relation 12773. Up to 863 conditions per place. [2023-11-06 21:55:46,487 INFO L140 encePairwiseOnDemand]: 264/272 looper letters, 173 selfloop transitions, 226 changer transitions 3/409 dead transitions. [2023-11-06 21:55:46,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 409 transitions, 5833 flow [2023-11-06 21:55:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:55:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:55:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3332 transitions. [2023-11-06 21:55:46,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2023-11-06 21:55:46,510 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3332 transitions. [2023-11-06 21:55:46,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3332 transitions. [2023-11-06 21:55:46,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:46,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3332 transitions. [2023-11-06 21:55:46,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 111.06666666666666) internal successors, (3332), 30 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:46,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 272.0) internal successors, (8432), 31 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:46,543 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 272.0) internal successors, (8432), 31 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:46,544 INFO L175 Difference]: Start difference. First operand has 160 places, 190 transitions, 2668 flow. Second operand 30 states and 3332 transitions. [2023-11-06 21:55:46,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 409 transitions, 5833 flow [2023-11-06 21:55:46,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 409 transitions, 5570 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-11-06 21:55:46,712 INFO L231 Difference]: Finished difference. Result has 186 places, 293 transitions, 4865 flow [2023-11-06 21:55:46,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4865, PETRI_PLACES=186, PETRI_TRANSITIONS=293} [2023-11-06 21:55:46,716 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2023-11-06 21:55:46,716 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 293 transitions, 4865 flow [2023-11-06 21:55:46,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.94736842105263) internal successors, (2013), 19 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:46,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:46,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:46,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:46,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:55:46,924 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 21:55:46,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2076664341, now seen corresponding path program 8 times [2023-11-06 21:55:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:46,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838403181] [2023-11-06 21:55:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:46,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838403181] [2023-11-06 21:55:47,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838403181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:47,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930206326] [2023-11-06 21:55:47,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:47,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:47,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:47,043 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:47,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:55:47,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:47,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:55:47,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:47,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:47,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930206326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:47,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2023-11-06 21:55:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118876936] [2023-11-06 21:55:47,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:47,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:55:47,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:55:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:55:47,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-11-06 21:55:47,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 293 transitions, 4865 flow. Second operand has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:47,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:47,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-11-06 21:55:47,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:48,253 INFO L124 PetriNetUnfolderBase]: 1117/2185 cut-off events. [2023-11-06 21:55:48,253 INFO L125 PetriNetUnfolderBase]: For 40356/40358 co-relation queries the response was YES. [2023-11-06 21:55:48,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18563 conditions, 2185 events. 1117/2185 cut-off events. For 40356/40358 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13903 event pairs, 88 based on Foata normal form. 64/2246 useless extension candidates. Maximal degree in co-relation 18110. Up to 1123 conditions per place. [2023-11-06 21:55:48,290 INFO L140 encePairwiseOnDemand]: 267/272 looper letters, 154 selfloop transitions, 180 changer transitions 30/371 dead transitions. [2023-11-06 21:55:48,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 371 transitions, 6854 flow [2023-11-06 21:55:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:55:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:55:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 638 transitions. [2023-11-06 21:55:48,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46911764705882353 [2023-11-06 21:55:48,298 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 638 transitions. [2023-11-06 21:55:48,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 638 transitions. [2023-11-06 21:55:48,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:48,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 638 transitions. [2023-11-06 21:55:48,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:48,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:48,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:48,303 INFO L175 Difference]: Start difference. First operand has 186 places, 293 transitions, 4865 flow. Second operand 5 states and 638 transitions. [2023-11-06 21:55:48,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 371 transitions, 6854 flow [2023-11-06 21:55:48,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 371 transitions, 5610 flow, removed 557 selfloop flow, removed 7 redundant places. [2023-11-06 21:55:48,701 INFO L231 Difference]: Finished difference. Result has 186 places, 321 transitions, 5042 flow [2023-11-06 21:55:48,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5042, PETRI_PLACES=186, PETRI_TRANSITIONS=321} [2023-11-06 21:55:48,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2023-11-06 21:55:48,706 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 321 transitions, 5042 flow [2023-11-06 21:55:48,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:48,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:48,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:48,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:55:48,913 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 21:55:48,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash -561375292, now seen corresponding path program 9 times [2023-11-06 21:55:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:48,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497476034] [2023-11-06 21:55:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:49,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:49,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497476034] [2023-11-06 21:55:49,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497476034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:49,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328399307] [2023-11-06 21:55:49,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:55:49,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:49,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:49,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:49,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:55:50,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:55:50,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:50,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:55:50,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:50,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:55:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:50,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:50,732 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:50,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-06 21:55:50,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-06 21:55:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:55:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328399307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:51,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:51,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-11-06 21:55:51,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814509483] [2023-11-06 21:55:51,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:51,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:55:51,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:51,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:55:51,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:55:52,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 272 [2023-11-06 21:55:52,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 321 transitions, 5042 flow. Second operand has 24 states, 24 states have (on average 101.66666666666667) internal successors, (2440), 24 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:52,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:52,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 272 [2023-11-06 21:55:52,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:56,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:55:58,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:56:00,074 INFO L124 PetriNetUnfolderBase]: 1525/2734 cut-off events. [2023-11-06 21:56:00,074 INFO L125 PetriNetUnfolderBase]: For 42052/42054 co-relation queries the response was YES. [2023-11-06 21:56:00,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21360 conditions, 2734 events. 1525/2734 cut-off events. For 42052/42054 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16261 event pairs, 66 based on Foata normal form. 138/2869 useless extension candidates. Maximal degree in co-relation 21284. Up to 1211 conditions per place. [2023-11-06 21:56:00,119 INFO L140 encePairwiseOnDemand]: 264/272 looper letters, 233 selfloop transitions, 395 changer transitions 6/641 dead transitions. [2023-11-06 21:56:00,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 641 transitions, 10507 flow [2023-11-06 21:56:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:56:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 21:56:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3795 transitions. [2023-11-06 21:56:00,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38756127450980393 [2023-11-06 21:56:00,207 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3795 transitions. [2023-11-06 21:56:00,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3795 transitions. [2023-11-06 21:56:00,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:00,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3795 transitions. [2023-11-06 21:56:00,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 105.41666666666667) internal successors, (3795), 36 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:00,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 272.0) internal successors, (10064), 37 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:00,236 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 272.0) internal successors, (10064), 37 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:00,237 INFO L175 Difference]: Start difference. First operand has 186 places, 321 transitions, 5042 flow. Second operand 36 states and 3795 transitions. [2023-11-06 21:56:00,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 641 transitions, 10507 flow [2023-11-06 21:56:00,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 641 transitions, 9701 flow, removed 385 selfloop flow, removed 6 redundant places. [2023-11-06 21:56:00,709 INFO L231 Difference]: Finished difference. Result has 222 places, 510 transitions, 8963 flow [2023-11-06 21:56:00,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8963, PETRI_PLACES=222, PETRI_TRANSITIONS=510} [2023-11-06 21:56:00,711 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 201 predicate places. [2023-11-06 21:56:00,711 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 510 transitions, 8963 flow [2023-11-06 21:56:00,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.66666666666667) internal successors, (2440), 24 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:00,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:56:00,919 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 21:56:00,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 606710858, now seen corresponding path program 10 times [2023-11-06 21:56:00,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:00,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741425598] [2023-11-06 21:56:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:00,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:01,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:01,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741425598] [2023-11-06 21:56:01,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741425598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:01,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352731796] [2023-11-06 21:56:01,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:56:01,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:01,748 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:01,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:56:01,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:56:01,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:01,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:56:01,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:01,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 21:56:02,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:56:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:02,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:02,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:02,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-11-06 21:56:02,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-06 21:56:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352731796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:03,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:03,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 21:56:03,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500882900] [2023-11-06 21:56:03,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:03,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 21:56:03,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 21:56:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=865, Unknown=1, NotChecked=0, Total=992 [2023-11-06 21:56:05,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 272 [2023-11-06 21:56:05,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 510 transitions, 8963 flow. Second operand has 32 states, 32 states have (on average 88.5625) internal successors, (2834), 32 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:05,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:05,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 272 [2023-11-06 21:56:05,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:08,875 INFO L124 PetriNetUnfolderBase]: 1692/3024 cut-off events. [2023-11-06 21:56:08,875 INFO L125 PetriNetUnfolderBase]: For 45569/45571 co-relation queries the response was YES. [2023-11-06 21:56:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25160 conditions, 3024 events. 1692/3024 cut-off events. For 45569/45571 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18241 event pairs, 124 based on Foata normal form. 68/3091 useless extension candidates. Maximal degree in co-relation 24817. Up to 1343 conditions per place. [2023-11-06 21:56:08,926 INFO L140 encePairwiseOnDemand]: 265/272 looper letters, 261 selfloop transitions, 401 changer transitions 1/670 dead transitions. [2023-11-06 21:56:08,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 670 transitions, 12762 flow [2023-11-06 21:56:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:56:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 21:56:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1768 transitions. [2023-11-06 21:56:08,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34210526315789475 [2023-11-06 21:56:08,933 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1768 transitions. [2023-11-06 21:56:08,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1768 transitions. [2023-11-06 21:56:08,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:08,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1768 transitions. [2023-11-06 21:56:08,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.05263157894737) internal successors, (1768), 19 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:08,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 272.0) internal successors, (5440), 20 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:08,948 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 272.0) internal successors, (5440), 20 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:08,949 INFO L175 Difference]: Start difference. First operand has 222 places, 510 transitions, 8963 flow. Second operand 19 states and 1768 transitions. [2023-11-06 21:56:08,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 670 transitions, 12762 flow [2023-11-06 21:56:09,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 670 transitions, 10749 flow, removed 933 selfloop flow, removed 11 redundant places. [2023-11-06 21:56:09,508 INFO L231 Difference]: Finished difference. Result has 234 places, 603 transitions, 10273 flow [2023-11-06 21:56:09,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=7646, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10273, PETRI_PLACES=234, PETRI_TRANSITIONS=603} [2023-11-06 21:56:09,509 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-11-06 21:56:09,510 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 603 transitions, 10273 flow [2023-11-06 21:56:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 88.5625) internal successors, (2834), 32 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:09,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:09,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:09,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 21:56:09,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:09,716 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 21:56:09,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1200890505, now seen corresponding path program 11 times [2023-11-06 21:56:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:09,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243273773] [2023-11-06 21:56:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:09,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:12,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:12,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243273773] [2023-11-06 21:56:12,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243273773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:12,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116235298] [2023-11-06 21:56:12,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:56:12,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:12,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:12,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:12,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:56:12,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:56:12,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:12,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 21:56:12,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:12,799 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 21:56:12,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:13,108 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:13,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-06 21:56:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:13,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116235298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:13,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:13,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-11-06 21:56:13,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91800575] [2023-11-06 21:56:13,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:13,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:56:13,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:13,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:56:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:56:17,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 272 [2023-11-06 21:56:17,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 603 transitions, 10273 flow. Second operand has 29 states, 29 states have (on average 90.82758620689656) internal successors, (2634), 29 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:17,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:17,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 272 [2023-11-06 21:56:17,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:23,079 INFO L124 PetriNetUnfolderBase]: 2251/4017 cut-off events. [2023-11-06 21:56:23,079 INFO L125 PetriNetUnfolderBase]: For 50658/50658 co-relation queries the response was YES. [2023-11-06 21:56:23,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31094 conditions, 4017 events. 2251/4017 cut-off events. For 50658/50658 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25638 event pairs, 84 based on Foata normal form. 28/4045 useless extension candidates. Maximal degree in co-relation 30805. Up to 1827 conditions per place. [2023-11-06 21:56:23,125 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 210 selfloop transitions, 136 changer transitions 637/984 dead transitions. [2023-11-06 21:56:23,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 984 transitions, 17612 flow [2023-11-06 21:56:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 21:56:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 21:56:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3661 transitions. [2023-11-06 21:56:23,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34511689291101055 [2023-11-06 21:56:23,133 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3661 transitions. [2023-11-06 21:56:23,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3661 transitions. [2023-11-06 21:56:23,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:23,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3661 transitions. [2023-11-06 21:56:23,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 93.87179487179488) internal successors, (3661), 39 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 272.0) internal successors, (10880), 40 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,155 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 272.0) internal successors, (10880), 40 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,155 INFO L175 Difference]: Start difference. First operand has 234 places, 603 transitions, 10273 flow. Second operand 39 states and 3661 transitions. [2023-11-06 21:56:23,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 984 transitions, 17612 flow [2023-11-06 21:56:23,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 984 transitions, 16770 flow, removed 394 selfloop flow, removed 9 redundant places. [2023-11-06 21:56:23,989 INFO L231 Difference]: Finished difference. Result has 275 places, 275 transitions, 4631 flow [2023-11-06 21:56:23,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=9798, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4631, PETRI_PLACES=275, PETRI_TRANSITIONS=275} [2023-11-06 21:56:23,990 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-11-06 21:56:23,991 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 275 transitions, 4631 flow [2023-11-06 21:56:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.82758620689656) internal successors, (2634), 29 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:23,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:23,992 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:24,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:24,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:24,198 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 21:56:24,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2039633113, now seen corresponding path program 12 times [2023-11-06 21:56:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:24,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718664294] [2023-11-06 21:56:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:24,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:25,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718664294] [2023-11-06 21:56:25,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718664294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:25,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749625519] [2023-11-06 21:56:25,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:56:25,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:25,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:25,959 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:25,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:56:26,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:56:26,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:26,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 21:56:26,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:26,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-11-06 21:56:27,182 INFO L322 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-11-06 21:56:27,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 42 [2023-11-06 21:56:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:27,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:28,086 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 21:56:28,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 83 [2023-11-06 21:56:28,190 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:28,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 8 [2023-11-06 21:56:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:29,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749625519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:29,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:29,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-11-06 21:56:29,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359984786] [2023-11-06 21:56:29,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:29,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 21:56:29,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 21:56:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1216, Unknown=1, NotChecked=0, Total=1406 [2023-11-06 21:56:30,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:56:30,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 275 transitions, 4631 flow. Second operand has 38 states, 38 states have (on average 76.52631578947368) internal successors, (2908), 38 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:30,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:30,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:56:30,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:34,477 INFO L124 PetriNetUnfolderBase]: 631/1262 cut-off events. [2023-11-06 21:56:34,477 INFO L125 PetriNetUnfolderBase]: For 15144/15145 co-relation queries the response was YES. [2023-11-06 21:56:34,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9597 conditions, 1262 events. 631/1262 cut-off events. For 15144/15145 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7177 event pairs, 161 based on Foata normal form. 18/1280 useless extension candidates. Maximal degree in co-relation 9499. Up to 726 conditions per place. [2023-11-06 21:56:34,497 INFO L140 encePairwiseOnDemand]: 263/272 looper letters, 231 selfloop transitions, 68 changer transitions 33/333 dead transitions. [2023-11-06 21:56:34,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 333 transitions, 5545 flow [2023-11-06 21:56:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:56:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:56:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2068 transitions. [2023-11-06 21:56:34,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.292420814479638 [2023-11-06 21:56:34,503 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2068 transitions. [2023-11-06 21:56:34,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2068 transitions. [2023-11-06 21:56:34,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:34,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2068 transitions. [2023-11-06 21:56:34,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 79.53846153846153) internal successors, (2068), 26 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:34,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 272.0) internal successors, (7344), 27 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:34,515 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 272.0) internal successors, (7344), 27 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:34,515 INFO L175 Difference]: Start difference. First operand has 275 places, 275 transitions, 4631 flow. Second operand 26 states and 2068 transitions. [2023-11-06 21:56:34,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 333 transitions, 5545 flow [2023-11-06 21:56:34,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 333 transitions, 4706 flow, removed 280 selfloop flow, removed 46 redundant places. [2023-11-06 21:56:34,672 INFO L231 Difference]: Finished difference. Result has 220 places, 255 transitions, 3715 flow [2023-11-06 21:56:34,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3715, PETRI_PLACES=220, PETRI_TRANSITIONS=255} [2023-11-06 21:56:34,673 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2023-11-06 21:56:34,673 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 255 transitions, 3715 flow [2023-11-06 21:56:34,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.52631578947368) internal successors, (2908), 38 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:34,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:34,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:34,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:34,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 21:56:34,874 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 21:56:34,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1218128757, now seen corresponding path program 13 times [2023-11-06 21:56:34,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:34,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462396604] [2023-11-06 21:56:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:34,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:36,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462396604] [2023-11-06 21:56:36,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462396604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392967667] [2023-11-06 21:56:36,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:56:36,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:36,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:36,154 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:36,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:56:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:36,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:56:36,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:36,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:36,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-06 21:56:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:56:36,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:36,811 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:36,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-11-06 21:56:36,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-06 21:56:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 21:56:37,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392967667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:37,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:37,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-11-06 21:56:37,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599532326] [2023-11-06 21:56:37,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:37,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 21:56:37,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:37,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 21:56:37,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=673, Unknown=3, NotChecked=0, Total=756 [2023-11-06 21:56:38,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 272 [2023-11-06 21:56:38,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 255 transitions, 3715 flow. Second operand has 28 states, 28 states have (on average 88.78571428571429) internal successors, (2486), 28 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:38,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:38,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 272 [2023-11-06 21:56:38,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:40,597 INFO L124 PetriNetUnfolderBase]: 828/1567 cut-off events. [2023-11-06 21:56:40,597 INFO L125 PetriNetUnfolderBase]: For 14514/14514 co-relation queries the response was YES. [2023-11-06 21:56:40,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11156 conditions, 1567 events. 828/1567 cut-off events. For 14514/14514 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8908 event pairs, 52 based on Foata normal form. 20/1586 useless extension candidates. Maximal degree in co-relation 11081. Up to 478 conditions per place. [2023-11-06 21:56:40,622 INFO L140 encePairwiseOnDemand]: 264/272 looper letters, 225 selfloop transitions, 157 changer transitions 0/388 dead transitions. [2023-11-06 21:56:40,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 388 transitions, 6229 flow [2023-11-06 21:56:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:56:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 21:56:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1561 transitions. [2023-11-06 21:56:40,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3375865051903114 [2023-11-06 21:56:40,626 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1561 transitions. [2023-11-06 21:56:40,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1561 transitions. [2023-11-06 21:56:40,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:40,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1561 transitions. [2023-11-06 21:56:40,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.82352941176471) internal successors, (1561), 17 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:40,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 272.0) internal successors, (4896), 18 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:40,636 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 272.0) internal successors, (4896), 18 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:40,637 INFO L175 Difference]: Start difference. First operand has 220 places, 255 transitions, 3715 flow. Second operand 17 states and 1561 transitions. [2023-11-06 21:56:40,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 388 transitions, 6229 flow [2023-11-06 21:56:40,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 388 transitions, 5754 flow, removed 113 selfloop flow, removed 26 redundant places. [2023-11-06 21:56:40,778 INFO L231 Difference]: Finished difference. Result has 207 places, 292 transitions, 4399 flow [2023-11-06 21:56:40,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4399, PETRI_PLACES=207, PETRI_TRANSITIONS=292} [2023-11-06 21:56:40,779 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-11-06 21:56:40,779 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 292 transitions, 4399 flow [2023-11-06 21:56:40,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 88.78571428571429) internal successors, (2486), 28 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:40,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:40,780 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:40,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:40,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 21:56:40,981 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 21:56:40,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash -299610701, now seen corresponding path program 14 times [2023-11-06 21:56:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:40,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479431632] [2023-11-06 21:56:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:42,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:42,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479431632] [2023-11-06 21:56:42,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479431632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:42,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755716923] [2023-11-06 21:56:42,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:56:42,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:42,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:42,225 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:42,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:56:42,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:56:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:42,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 21:56:42,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:43,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:43,645 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:43,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-06 21:56:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:44,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755716923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:44,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:44,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-11-06 21:56:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473277232] [2023-11-06 21:56:44,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:44,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 21:56:44,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:44,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 21:56:44,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:56:47,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 272 [2023-11-06 21:56:47,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 292 transitions, 4399 flow. Second operand has 35 states, 35 states have (on average 94.62857142857143) internal successors, (3312), 35 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:47,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:47,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 272 [2023-11-06 21:56:47,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:49,876 INFO L124 PetriNetUnfolderBase]: 875/1676 cut-off events. [2023-11-06 21:56:49,876 INFO L125 PetriNetUnfolderBase]: For 14974/14975 co-relation queries the response was YES. [2023-11-06 21:56:49,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11575 conditions, 1676 events. 875/1676 cut-off events. For 14974/14975 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9912 event pairs, 166 based on Foata normal form. 5/1681 useless extension candidates. Maximal degree in co-relation 11506. Up to 1227 conditions per place. [2023-11-06 21:56:49,897 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 209 selfloop transitions, 113 changer transitions 36/359 dead transitions. [2023-11-06 21:56:49,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 359 transitions, 5516 flow [2023-11-06 21:56:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:56:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 21:56:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2622 transitions. [2023-11-06 21:56:49,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570261437908497 [2023-11-06 21:56:49,902 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2622 transitions. [2023-11-06 21:56:49,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2622 transitions. [2023-11-06 21:56:49,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:49,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2622 transitions. [2023-11-06 21:56:49,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 97.11111111111111) internal successors, (2622), 27 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 272.0) internal successors, (7616), 28 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,914 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 272.0) internal successors, (7616), 28 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,915 INFO L175 Difference]: Start difference. First operand has 207 places, 292 transitions, 4399 flow. Second operand 27 states and 2622 transitions. [2023-11-06 21:56:49,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 359 transitions, 5516 flow [2023-11-06 21:56:50,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 359 transitions, 5432 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-11-06 21:56:50,031 INFO L231 Difference]: Finished difference. Result has 235 places, 293 transitions, 4685 flow [2023-11-06 21:56:50,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4685, PETRI_PLACES=235, PETRI_TRANSITIONS=293} [2023-11-06 21:56:50,032 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-11-06 21:56:50,033 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 293 transitions, 4685 flow [2023-11-06 21:56:50,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 94.62857142857143) internal successors, (3312), 35 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:50,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:50,034 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:50,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:50,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 21:56:50,240 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 21:56:50,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:50,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1485191115, now seen corresponding path program 15 times [2023-11-06 21:56:50,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:50,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358987834] [2023-11-06 21:56:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:50,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:51,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358987834] [2023-11-06 21:56:51,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358987834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757938278] [2023-11-06 21:56:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:56:51,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:51,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:51,602 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:51,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:56:51,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:56:51,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:51,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:56:51,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:52,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:52,549 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:52,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 59 [2023-11-06 21:56:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757938278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:52,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 24 [2023-11-06 21:56:52,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476027480] [2023-11-06 21:56:52,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:52,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:56:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:56:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:56:54,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 272 [2023-11-06 21:56:54,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 293 transitions, 4685 flow. Second operand has 26 states, 26 states have (on average 96.92307692307692) internal successors, (2520), 26 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:54,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:54,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 272 [2023-11-06 21:56:54,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:57,628 INFO L124 PetriNetUnfolderBase]: 876/1719 cut-off events. [2023-11-06 21:56:57,628 INFO L125 PetriNetUnfolderBase]: For 15714/15715 co-relation queries the response was YES. [2023-11-06 21:56:57,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12200 conditions, 1719 events. 876/1719 cut-off events. For 15714/15715 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10331 event pairs, 142 based on Foata normal form. 12/1731 useless extension candidates. Maximal degree in co-relation 12122. Up to 1272 conditions per place. [2023-11-06 21:56:57,654 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 259 selfloop transitions, 90 changer transitions 43/393 dead transitions. [2023-11-06 21:56:57,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 393 transitions, 6097 flow [2023-11-06 21:56:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 21:56:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 21:56:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3374 transitions. [2023-11-06 21:56:57,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3648356401384083 [2023-11-06 21:56:57,661 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3374 transitions. [2023-11-06 21:56:57,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3374 transitions. [2023-11-06 21:56:57,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:57,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3374 transitions. [2023-11-06 21:56:57,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 99.23529411764706) internal successors, (3374), 34 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 272.0) internal successors, (9520), 35 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,680 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 272.0) internal successors, (9520), 35 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,680 INFO L175 Difference]: Start difference. First operand has 235 places, 293 transitions, 4685 flow. Second operand 34 states and 3374 transitions. [2023-11-06 21:56:57,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 393 transitions, 6097 flow [2023-11-06 21:56:57,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 393 transitions, 5724 flow, removed 81 selfloop flow, removed 21 redundant places. [2023-11-06 21:56:57,858 INFO L231 Difference]: Finished difference. Result has 254 places, 302 transitions, 4785 flow [2023-11-06 21:56:57,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4785, PETRI_PLACES=254, PETRI_TRANSITIONS=302} [2023-11-06 21:56:57,859 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 233 predicate places. [2023-11-06 21:56:57,859 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 302 transitions, 4785 flow [2023-11-06 21:56:57,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 96.92307692307692) internal successors, (2520), 26 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:57,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:57,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:58,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:58,061 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 21:56:58,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:58,062 INFO L85 PathProgramCache]: Analyzing trace with hash -732448577, now seen corresponding path program 16 times [2023-11-06 21:56:58,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:58,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481634757] [2023-11-06 21:56:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:58,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:59,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481634757] [2023-11-06 21:56:59,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481634757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:59,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821661686] [2023-11-06 21:56:59,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:56:59,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:59,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:59,135 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:59,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 21:56:59,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:56:59,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:59,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 21:56:59,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:59,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:59,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-11-06 21:57:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:00,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:00,492 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:00,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-06 21:57:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:01,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821661686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:01,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:01,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-11-06 21:57:01,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133193634] [2023-11-06 21:57:01,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:01,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 21:57:01,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:01,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 21:57:01,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:57:03,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 272 [2023-11-06 21:57:03,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 302 transitions, 4785 flow. Second operand has 35 states, 35 states have (on average 94.65714285714286) internal successors, (3313), 35 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:03,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:03,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 272 [2023-11-06 21:57:03,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:07,197 INFO L124 PetriNetUnfolderBase]: 860/1698 cut-off events. [2023-11-06 21:57:07,197 INFO L125 PetriNetUnfolderBase]: For 15531/15532 co-relation queries the response was YES. [2023-11-06 21:57:07,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11867 conditions, 1698 events. 860/1698 cut-off events. For 15531/15532 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10234 event pairs, 155 based on Foata normal form. 3/1701 useless extension candidates. Maximal degree in co-relation 11782. Up to 1216 conditions per place. [2023-11-06 21:57:07,221 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 245 selfloop transitions, 115 changer transitions 18/379 dead transitions. [2023-11-06 21:57:07,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 379 transitions, 5897 flow [2023-11-06 21:57:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 21:57:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 21:57:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3585 transitions. [2023-11-06 21:57:07,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562201907790143 [2023-11-06 21:57:07,227 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3585 transitions. [2023-11-06 21:57:07,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3585 transitions. [2023-11-06 21:57:07,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:07,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3585 transitions. [2023-11-06 21:57:07,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.89189189189189) internal successors, (3585), 37 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:07,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 272.0) internal successors, (10336), 38 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:07,243 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 272.0) internal successors, (10336), 38 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:07,243 INFO L175 Difference]: Start difference. First operand has 254 places, 302 transitions, 4785 flow. Second operand 37 states and 3585 transitions. [2023-11-06 21:57:07,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 379 transitions, 5897 flow [2023-11-06 21:57:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 379 transitions, 5742 flow, removed 35 selfloop flow, removed 24 redundant places. [2023-11-06 21:57:07,399 INFO L231 Difference]: Finished difference. Result has 264 places, 306 transitions, 4986 flow [2023-11-06 21:57:07,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4986, PETRI_PLACES=264, PETRI_TRANSITIONS=306} [2023-11-06 21:57:07,400 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2023-11-06 21:57:07,400 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 306 transitions, 4986 flow [2023-11-06 21:57:07,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 94.65714285714286) internal successors, (3313), 35 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:07,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:07,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:07,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:07,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 21:57:07,602 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 21:57:07,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1215296433, now seen corresponding path program 17 times [2023-11-06 21:57:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:07,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177514560] [2023-11-06 21:57:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:07,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:09,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:09,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177514560] [2023-11-06 21:57:09,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177514560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:09,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901432369] [2023-11-06 21:57:09,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:57:09,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:09,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:09,390 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:09,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 21:57:09,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:57:09,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:09,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 21:57:09,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:09,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-06 21:57:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:57:10,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:10,831 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:10,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 147 [2023-11-06 21:57:10,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:10,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 63 [2023-11-06 21:57:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901432369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:11,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-11-06 21:57:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840265051] [2023-11-06 21:57:11,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 21:57:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 21:57:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=960, Unknown=4, NotChecked=0, Total=1056 [2023-11-06 21:57:12,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:57:12,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 306 transitions, 4986 flow. Second operand has 33 states, 33 states have (on average 76.66666666666667) internal successors, (2530), 33 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:12,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:12,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:57:12,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:17,588 INFO L124 PetriNetUnfolderBase]: 899/1777 cut-off events. [2023-11-06 21:57:17,588 INFO L125 PetriNetUnfolderBase]: For 16529/16529 co-relation queries the response was YES. [2023-11-06 21:57:17,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12535 conditions, 1777 events. 899/1777 cut-off events. For 16529/16529 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10942 event pairs, 85 based on Foata normal form. 8/1785 useless extension candidates. Maximal degree in co-relation 12453. Up to 968 conditions per place. [2023-11-06 21:57:17,615 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 219 selfloop transitions, 135 changer transitions 72/427 dead transitions. [2023-11-06 21:57:17,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 427 transitions, 6506 flow [2023-11-06 21:57:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 21:57:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 21:57:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3181 transitions. [2023-11-06 21:57:17,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29237132352941175 [2023-11-06 21:57:17,621 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3181 transitions. [2023-11-06 21:57:17,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3181 transitions. [2023-11-06 21:57:17,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:17,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3181 transitions. [2023-11-06 21:57:17,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 79.525) internal successors, (3181), 40 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:17,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 272.0) internal successors, (11152), 41 states have internal predecessors, (11152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:17,638 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 272.0) internal successors, (11152), 41 states have internal predecessors, (11152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:17,638 INFO L175 Difference]: Start difference. First operand has 264 places, 306 transitions, 4986 flow. Second operand 40 states and 3181 transitions. [2023-11-06 21:57:17,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 427 transitions, 6506 flow [2023-11-06 21:57:17,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 427 transitions, 6268 flow, removed 27 selfloop flow, removed 23 redundant places. [2023-11-06 21:57:17,794 INFO L231 Difference]: Finished difference. Result has 284 places, 300 transitions, 5091 flow [2023-11-06 21:57:17,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5091, PETRI_PLACES=284, PETRI_TRANSITIONS=300} [2023-11-06 21:57:17,796 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 263 predicate places. [2023-11-06 21:57:17,796 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 300 transitions, 5091 flow [2023-11-06 21:57:17,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.66666666666667) internal successors, (2530), 33 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:17,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:17,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:17,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:17,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 21:57:17,998 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 21:57:17,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash -818461017, now seen corresponding path program 18 times [2023-11-06 21:57:17,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:17,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957472721] [2023-11-06 21:57:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:17,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:19,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957472721] [2023-11-06 21:57:19,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957472721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222943966] [2023-11-06 21:57:19,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:57:19,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:19,499 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:19,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 21:57:19,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:57:19,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:19,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 21:57:19,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:20,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:20,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:57:20,440 INFO L322 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-06 21:57:20,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-11-06 21:57:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:20,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:21,350 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 21:57:21,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 103 [2023-11-06 21:57:21,380 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-11-06 21:57:21,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 41 [2023-11-06 21:57:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:22,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222943966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:22,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:22,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-11-06 21:57:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631497997] [2023-11-06 21:57:22,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 21:57:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 21:57:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1187, Unknown=1, NotChecked=0, Total=1332 [2023-11-06 21:57:23,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:57:23,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 300 transitions, 5091 flow. Second operand has 37 states, 37 states have (on average 76.51351351351352) internal successors, (2831), 37 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:23,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:57:23,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:27,005 INFO L124 PetriNetUnfolderBase]: 793/1504 cut-off events. [2023-11-06 21:57:27,005 INFO L125 PetriNetUnfolderBase]: For 16352/16352 co-relation queries the response was YES. [2023-11-06 21:57:27,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11307 conditions, 1504 events. 793/1504 cut-off events. For 16352/16352 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8683 event pairs, 233 based on Foata normal form. 35/1539 useless extension candidates. Maximal degree in co-relation 11218. Up to 1169 conditions per place. [2023-11-06 21:57:27,092 INFO L140 encePairwiseOnDemand]: 263/272 looper letters, 200 selfloop transitions, 5 changer transitions 100/306 dead transitions. [2023-11-06 21:57:27,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 306 transitions, 5434 flow [2023-11-06 21:57:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:57:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 21:57:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1494 transitions. [2023-11-06 21:57:27,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28908668730650156 [2023-11-06 21:57:27,095 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1494 transitions. [2023-11-06 21:57:27,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1494 transitions. [2023-11-06 21:57:27,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:27,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1494 transitions. [2023-11-06 21:57:27,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.63157894736842) internal successors, (1494), 19 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:27,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 272.0) internal successors, (5440), 20 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:27,103 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 272.0) internal successors, (5440), 20 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:27,104 INFO L175 Difference]: Start difference. First operand has 284 places, 300 transitions, 5091 flow. Second operand 19 states and 1494 transitions. [2023-11-06 21:57:27,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 306 transitions, 5434 flow [2023-11-06 21:57:27,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 306 transitions, 5019 flow, removed 57 selfloop flow, removed 41 redundant places. [2023-11-06 21:57:27,240 INFO L231 Difference]: Finished difference. Result has 239 places, 206 transitions, 3257 flow [2023-11-06 21:57:27,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3257, PETRI_PLACES=239, PETRI_TRANSITIONS=206} [2023-11-06 21:57:27,241 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2023-11-06 21:57:27,241 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 206 transitions, 3257 flow [2023-11-06 21:57:27,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.51351351351352) internal successors, (2831), 37 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:27,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:27,242 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:27,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:27,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 21:57:27,442 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 21:57:27,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:27,443 INFO L85 PathProgramCache]: Analyzing trace with hash 601368504, now seen corresponding path program 19 times [2023-11-06 21:57:27,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:27,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439602927] [2023-11-06 21:57:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:27,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:29,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:29,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439602927] [2023-11-06 21:57:29,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439602927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:29,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32273693] [2023-11-06 21:57:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:57:29,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:29,747 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:29,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 21:57:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:29,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 21:57:29,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:57:30,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:30,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:30,752 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-06 21:57:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 21:57:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32273693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:30,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:30,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 28 [2023-11-06 21:57:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876585156] [2023-11-06 21:57:30,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:30,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:57:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:57:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:57:33,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 272 [2023-11-06 21:57:33,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 206 transitions, 3257 flow. Second operand has 30 states, 30 states have (on average 96.83333333333333) internal successors, (2905), 30 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:33,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:33,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 272 [2023-11-06 21:57:33,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:36,271 INFO L124 PetriNetUnfolderBase]: 686/1258 cut-off events. [2023-11-06 21:57:36,271 INFO L125 PetriNetUnfolderBase]: For 12873/12874 co-relation queries the response was YES. [2023-11-06 21:57:36,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9210 conditions, 1258 events. 686/1258 cut-off events. For 12873/12874 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6745 event pairs, 138 based on Foata normal form. 4/1262 useless extension candidates. Maximal degree in co-relation 9130. Up to 977 conditions per place. [2023-11-06 21:57:36,289 INFO L140 encePairwiseOnDemand]: 263/272 looper letters, 189 selfloop transitions, 72 changer transitions 24/286 dead transitions. [2023-11-06 21:57:36,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 286 transitions, 4285 flow [2023-11-06 21:57:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:57:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:57:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3074 transitions. [2023-11-06 21:57:36,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36456356736242884 [2023-11-06 21:57:36,295 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3074 transitions. [2023-11-06 21:57:36,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3074 transitions. [2023-11-06 21:57:36,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:36,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3074 transitions. [2023-11-06 21:57:36,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.16129032258064) internal successors, (3074), 31 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:36,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 272.0) internal successors, (8704), 32 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:36,307 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 272.0) internal successors, (8704), 32 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:36,307 INFO L175 Difference]: Start difference. First operand has 239 places, 206 transitions, 3257 flow. Second operand 31 states and 3074 transitions. [2023-11-06 21:57:36,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 286 transitions, 4285 flow [2023-11-06 21:57:36,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 286 transitions, 4096 flow, removed 26 selfloop flow, removed 22 redundant places. [2023-11-06 21:57:36,401 INFO L231 Difference]: Finished difference. Result has 189 places, 223 transitions, 3498 flow [2023-11-06 21:57:36,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3498, PETRI_PLACES=189, PETRI_TRANSITIONS=223} [2023-11-06 21:57:36,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2023-11-06 21:57:36,402 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 223 transitions, 3498 flow [2023-11-06 21:57:36,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 96.83333333333333) internal successors, (2905), 30 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:36,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:36,403 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:36,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:36,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 21:57:36,611 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 21:57:36,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash 235701090, now seen corresponding path program 20 times [2023-11-06 21:57:36,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:36,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738650949] [2023-11-06 21:57:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:36,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:39,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:39,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738650949] [2023-11-06 21:57:39,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738650949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:39,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872317744] [2023-11-06 21:57:39,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:57:39,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:39,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:39,081 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:39,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 21:57:39,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:57:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:39,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 21:57:39,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:39,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-06 21:57:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:57:40,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:40,485 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_852) c_~q~0.base)) (.cse2 (* c_~q_front~0 4))) (let ((.cse0 (select .cse1 (+ .cse2 c_~q~0.offset)))) (or (= .cse0 0) (= (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) (+ c_~s~0 .cse0 (select .cse1 (+ .cse2 c_~q~0.offset 4)))) (not (= (select .cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)))))) is different from false [2023-11-06 21:57:40,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:40,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 125 [2023-11-06 21:57:40,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:40,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 56 [2023-11-06 21:57:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 21:57:41,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872317744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:41,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:41,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-11-06 21:57:41,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213028169] [2023-11-06 21:57:41,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:41,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 21:57:41,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:41,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 21:57:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1100, Unknown=1, NotChecked=66, Total=1260 [2023-11-06 21:57:41,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:57:41,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 223 transitions, 3498 flow. Second operand has 36 states, 36 states have (on average 76.61111111111111) internal successors, (2758), 36 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:41,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:41,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:57:41,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:44,163 INFO L124 PetriNetUnfolderBase]: 704/1293 cut-off events. [2023-11-06 21:57:44,163 INFO L125 PetriNetUnfolderBase]: For 11007/11008 co-relation queries the response was YES. [2023-11-06 21:57:44,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9256 conditions, 1293 events. 704/1293 cut-off events. For 11007/11008 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6933 event pairs, 76 based on Foata normal form. 4/1297 useless extension candidates. Maximal degree in co-relation 9182. Up to 937 conditions per place. [2023-11-06 21:57:44,181 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 191 selfloop transitions, 98 changer transitions 6/296 dead transitions. [2023-11-06 21:57:44,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 296 transitions, 4548 flow [2023-11-06 21:57:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:57:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 21:57:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2296 transitions. [2023-11-06 21:57:44,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29107505070993916 [2023-11-06 21:57:44,186 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2296 transitions. [2023-11-06 21:57:44,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2296 transitions. [2023-11-06 21:57:44,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:44,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2296 transitions. [2023-11-06 21:57:44,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.17241379310344) internal successors, (2296), 29 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:44,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 272.0) internal successors, (8160), 30 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:44,201 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 272.0) internal successors, (8160), 30 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:44,202 INFO L175 Difference]: Start difference. First operand has 189 places, 223 transitions, 3498 flow. Second operand 29 states and 2296 transitions. [2023-11-06 21:57:44,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 296 transitions, 4548 flow [2023-11-06 21:57:44,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 296 transitions, 4435 flow, removed 7 selfloop flow, removed 17 redundant places. [2023-11-06 21:57:44,329 INFO L231 Difference]: Finished difference. Result has 202 places, 239 transitions, 3878 flow [2023-11-06 21:57:44,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3878, PETRI_PLACES=202, PETRI_TRANSITIONS=239} [2023-11-06 21:57:44,330 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2023-11-06 21:57:44,331 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 239 transitions, 3878 flow [2023-11-06 21:57:44,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.61111111111111) internal successors, (2758), 36 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:44,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:44,332 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:44,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:44,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 21:57:44,539 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 21:57:44,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash -689446743, now seen corresponding path program 21 times [2023-11-06 21:57:44,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:44,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096230695] [2023-11-06 21:57:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:44,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:46,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:46,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096230695] [2023-11-06 21:57:46,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096230695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:46,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404894668] [2023-11-06 21:57:46,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:57:46,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:46,216 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:46,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 21:57:46,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:57:46,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:46,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:57:46,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:57:46,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:57:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:57:46,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:47,060 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:57:47,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 63 [2023-11-06 21:57:47,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-06 21:57:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:57:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404894668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:47,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:47,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 27 [2023-11-06 21:57:47,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911973589] [2023-11-06 21:57:47,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:47,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:57:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:57:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=716, Unknown=4, NotChecked=0, Total=812 [2023-11-06 21:57:48,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 272 [2023-11-06 21:57:48,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 239 transitions, 3878 flow. Second operand has 29 states, 29 states have (on average 76.75862068965517) internal successors, (2226), 29 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:48,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:48,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 272 [2023-11-06 21:57:48,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:50,393 INFO L124 PetriNetUnfolderBase]: 704/1289 cut-off events. [2023-11-06 21:57:50,393 INFO L125 PetriNetUnfolderBase]: For 11372/11373 co-relation queries the response was YES. [2023-11-06 21:57:50,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 1289 events. 704/1289 cut-off events. For 11372/11373 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6925 event pairs, 106 based on Foata normal form. 2/1291 useless extension candidates. Maximal degree in co-relation 9571. Up to 1171 conditions per place. [2023-11-06 21:57:50,413 INFO L140 encePairwiseOnDemand]: 264/272 looper letters, 209 selfloop transitions, 32 changer transitions 12/254 dead transitions. [2023-11-06 21:57:50,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 254 transitions, 4443 flow [2023-11-06 21:57:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:57:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 21:57:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 945 transitions. [2023-11-06 21:57:50,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28952205882352944 [2023-11-06 21:57:50,416 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 945 transitions. [2023-11-06 21:57:50,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 945 transitions. [2023-11-06 21:57:50,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:50,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 945 transitions. [2023-11-06 21:57:50,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 78.75) internal successors, (945), 12 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 272.0) internal successors, (3536), 13 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,421 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 272.0) internal successors, (3536), 13 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,421 INFO L175 Difference]: Start difference. First operand has 202 places, 239 transitions, 3878 flow. Second operand 12 states and 945 transitions. [2023-11-06 21:57:50,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 254 transitions, 4443 flow [2023-11-06 21:57:50,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 254 transitions, 4253 flow, removed 26 selfloop flow, removed 17 redundant places. [2023-11-06 21:57:50,509 INFO L231 Difference]: Finished difference. Result has 195 places, 235 transitions, 3700 flow [2023-11-06 21:57:50,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3700, PETRI_PLACES=195, PETRI_TRANSITIONS=235} [2023-11-06 21:57:50,510 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-11-06 21:57:50,510 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 235 transitions, 3700 flow [2023-11-06 21:57:50,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.75862068965517) internal successors, (2226), 29 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:50,511 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:50,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6dc06da-ea4e-48eb-89ba-a98617703721/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0