./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.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_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/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_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/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_625ea0d0-83e4-4ba7-a556-895ee8681337/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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:25,995 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:26,096 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:01:26,102 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:26,102 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:26,126 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:26,127 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:26,128 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:26,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:26,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:26,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:26,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:26,131 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:26,132 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:26,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:01:26,133 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:26,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:26,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:26,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:26,134 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:01:26,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:26,135 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:01:26,136 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:26,136 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:01:26,137 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:26,137 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:26,137 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:26,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:26,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:26,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:26,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:26,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:01:26,140 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:26,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:26,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:26,140 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:01:26,141 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:26,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:26,141 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:26,141 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_625ea0d0-83e4-4ba7-a556-895ee8681337/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2023-11-06 23:01:26,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:26,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:26,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:26,454 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:26,455 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:26,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-06 23:01:29,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:01:29,851 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:01:29,854 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-06 23:01:29,863 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/data/94a2a9341/b1d58ea2216840d7a4cac58b2ae2d5db/FLAGba02f7996 [2023-11-06 23:01:29,878 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/data/94a2a9341/b1d58ea2216840d7a4cac58b2ae2d5db [2023-11-06 23:01:29,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:01:29,883 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:01:29,884 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:29,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:01:29,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:01:29,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168b37bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29, skipping insertion in model container [2023-11-06 23:01:29,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,931 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:01:30,201 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_625ea0d0-83e4-4ba7-a556-895ee8681337/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-11-06 23:01:30,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:30,234 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:01:30,276 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_625ea0d0-83e4-4ba7-a556-895ee8681337/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-11-06 23:01:30,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:30,305 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:01:30,308 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:01:30,317 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:01:30,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30 WrapperNode [2023-11-06 23:01:30,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:30,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:30,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:01:30,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:01:30,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,382 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 267 [2023-11-06 23:01:30,383 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:30,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:01:30,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:01:30,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:01:30,394 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,425 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:01:30,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:01:30,426 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:01:30,426 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:01:30,427 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (1/1) ... [2023-11-06 23:01:30,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:30,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:30,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:01:30,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:01:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:01:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:01:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:01:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:01:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:01:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:01:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:01:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:01:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:01:30,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:01:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:01:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:01:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:01:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:01:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:01:30,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:01:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:01:30,505 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:01:30,657 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:01:30,680 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:01:31,104 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:01:31,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:01:31,322 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 23:01:31,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:31 BoogieIcfgContainer [2023-11-06 23:01:31,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:01:31,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:01:31,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:01:31,333 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:01:31,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:29" (1/3) ... [2023-11-06 23:01:31,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18849df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:31, skipping insertion in model container [2023-11-06 23:01:31,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:30" (2/3) ... [2023-11-06 23:01:31,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18849df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:31, skipping insertion in model container [2023-11-06 23:01:31,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:31" (3/3) ... [2023-11-06 23:01:31,338 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-11-06 23:01:31,348 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:01:31,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:01:31,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:01:31,361 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:01:31,496 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:01:31,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 230 transitions, 481 flow [2023-11-06 23:01:31,719 INFO L124 PetriNetUnfolderBase]: 18/227 cut-off events. [2023-11-06 23:01:31,719 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:01:31,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 227 events. 18/227 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 130 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 187. Up to 3 conditions per place. [2023-11-06 23:01:31,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 230 transitions, 481 flow [2023-11-06 23:01:31,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 216 transitions, 450 flow [2023-11-06 23:01:31,741 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:01:31,765 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 216 transitions, 450 flow [2023-11-06 23:01:31,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 216 transitions, 450 flow [2023-11-06 23:01:31,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 216 transitions, 450 flow [2023-11-06 23:01:31,926 INFO L124 PetriNetUnfolderBase]: 18/216 cut-off events. [2023-11-06 23:01:31,930 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:01:31,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 216 events. 18/216 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 129 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 187. Up to 3 conditions per place. [2023-11-06 23:01:31,937 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-11-06 23:01:42,077 INFO L134 LiptonReduction]: Checked pairs total: 2817 [2023-11-06 23:01:42,077 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-11-06 23:01:42,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:01:42,122 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;@1565a659, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:01:42,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 23:01:42,135 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:01:42,135 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-06 23:01:42,136 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:01:42,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:42,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:42,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:42,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1528527863, now seen corresponding path program 1 times [2023-11-06 23:01:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:42,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347051746] [2023-11-06 23:01:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:42,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347051746] [2023-11-06 23:01:42,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347051746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:42,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:42,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:42,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61589747] [2023-11-06 23:01:42,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:42,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:01:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:42,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:01:42,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:01:42,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 460 [2023-11-06 23:01:42,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 215.0) internal successors, (430), 2 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:42,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:42,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 460 [2023-11-06 23:01:42,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:42,774 INFO L124 PetriNetUnfolderBase]: 323/460 cut-off events. [2023-11-06 23:01:42,775 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 23:01:42,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1334 event pairs, 190 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2023-11-06 23:01:42,781 INFO L140 encePairwiseOnDemand]: 459/460 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-11-06 23:01:42,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2023-11-06 23:01:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:01:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 23:01:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 437 transitions. [2023-11-06 23:01:42,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-06 23:01:42,801 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 437 transitions. [2023-11-06 23:01:42,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 437 transitions. [2023-11-06 23:01:42,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:42,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 437 transitions. [2023-11-06 23:01:42,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:42,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 460.0) internal successors, (1380), 3 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:42,822 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 460.0) internal successors, (1380), 3 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:42,824 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 437 transitions. [2023-11-06 23:01:42,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 124 flow [2023-11-06 23:01:42,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:01:42,831 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-11-06 23:01:42,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-06 23:01:42,837 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-11-06 23:01:42,838 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-11-06 23:01:42,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.0) internal successors, (430), 2 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:42,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:42,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:42,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:01:42,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:42,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:42,840 INFO L85 PathProgramCache]: Analyzing trace with hash 242698053, now seen corresponding path program 1 times [2023-11-06 23:01:42,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:42,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048612164] [2023-11-06 23:01:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:42,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:43,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048612164] [2023-11-06 23:01:43,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048612164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:43,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:43,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:43,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228098609] [2023-11-06 23:01:43,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:43,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:43,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:43,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:43,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:43,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 460 [2023-11-06 23:01:43,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:43,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:43,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 460 [2023-11-06 23:01:43,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:43,531 INFO L124 PetriNetUnfolderBase]: 339/498 cut-off events. [2023-11-06 23:01:43,531 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 23:01:43,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 498 events. 339/498 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1503 event pairs, 201 based on Foata normal form. 25/384 useless extension candidates. Maximal degree in co-relation 1014. Up to 460 conditions per place. [2023-11-06 23:01:43,537 INFO L140 encePairwiseOnDemand]: 454/460 looper letters, 25 selfloop transitions, 2 changer transitions 13/41 dead transitions. [2023-11-06 23:01:43,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 171 flow [2023-11-06 23:01:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:01:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 807 transitions. [2023-11-06 23:01:43,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385869565217391 [2023-11-06 23:01:43,544 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 807 transitions. [2023-11-06 23:01:43,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 807 transitions. [2023-11-06 23:01:43,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:43,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 807 transitions. [2023-11-06 23:01:43,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.75) internal successors, (807), 4 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:43,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:43,559 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:43,559 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 807 transitions. [2023-11-06 23:01:43,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 171 flow [2023-11-06 23:01:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 171 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:01:43,561 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-11-06 23:01:43,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-06 23:01:43,562 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-06 23:01:43,563 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-11-06 23:01:43,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:43,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:43,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:43,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:01:43,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:43,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1014218908, now seen corresponding path program 1 times [2023-11-06 23:01:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760165402] [2023-11-06 23:01:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:43,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:43,743 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 23:01:43,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760165402] [2023-11-06 23:01:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760165402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:43,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:43,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411656284] [2023-11-06 23:01:43,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:43,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:43,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:43,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:43,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 460 [2023-11-06 23:01:43,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:43,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:43,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 460 [2023-11-06 23:01:43,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:44,057 INFO L124 PetriNetUnfolderBase]: 452/664 cut-off events. [2023-11-06 23:01:44,057 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-11-06 23:01:44,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 664 events. 452/664 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2329 event pairs, 280 based on Foata normal form. 46/536 useless extension candidates. Maximal degree in co-relation 1624. Up to 461 conditions per place. [2023-11-06 23:01:44,064 INFO L140 encePairwiseOnDemand]: 453/460 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2023-11-06 23:01:44,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 202 flow [2023-11-06 23:01:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:01:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 809 transitions. [2023-11-06 23:01:44,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43967391304347825 [2023-11-06 23:01:44,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 809 transitions. [2023-11-06 23:01:44,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 809 transitions. [2023-11-06 23:01:44,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:44,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 809 transitions. [2023-11-06 23:01:44,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,079 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,079 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 4 states and 809 transitions. [2023-11-06 23:01:44,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 202 flow [2023-11-06 23:01:44,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 198 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:44,082 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-11-06 23:01:44,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-06 23:01:44,084 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-06 23:01:44,088 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-11-06 23:01:44,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:44,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:44,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:44,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:01:44,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:44,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1993986766, now seen corresponding path program 1 times [2023-11-06 23:01:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300440675] [2023-11-06 23:01:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:45,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300440675] [2023-11-06 23:01:45,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300440675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:45,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:45,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:01:45,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175499693] [2023-11-06 23:01:45,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:45,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:01:45,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:01:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:01:45,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 460 [2023-11-06 23:01:45,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 190.66666666666666) internal successors, (1716), 9 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:45,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:45,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 460 [2023-11-06 23:01:45,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:46,025 INFO L124 PetriNetUnfolderBase]: 594/862 cut-off events. [2023-11-06 23:01:46,026 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-06 23:01:46,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 862 events. 594/862 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2883 event pairs, 13 based on Foata normal form. 1/652 useless extension candidates. Maximal degree in co-relation 2251. Up to 576 conditions per place. [2023-11-06 23:01:46,035 INFO L140 encePairwiseOnDemand]: 449/460 looper letters, 71 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2023-11-06 23:01:46,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 102 transitions, 519 flow [2023-11-06 23:01:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:01:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:01:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1793 transitions. [2023-11-06 23:01:46,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330917874396135 [2023-11-06 23:01:46,045 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1793 transitions. [2023-11-06 23:01:46,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1793 transitions. [2023-11-06 23:01:46,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:46,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1793 transitions. [2023-11-06 23:01:46,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 199.22222222222223) internal successors, (1793), 9 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,069 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,069 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 9 states and 1793 transitions. [2023-11-06 23:01:46,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 102 transitions, 519 flow [2023-11-06 23:01:46,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 102 transitions, 515 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:46,077 INFO L231 Difference]: Finished difference. Result has 45 places, 55 transitions, 287 flow [2023-11-06 23:01:46,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=45, PETRI_TRANSITIONS=55} [2023-11-06 23:01:46,080 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-11-06 23:01:46,080 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 55 transitions, 287 flow [2023-11-06 23:01:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 190.66666666666666) internal successors, (1716), 9 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:46,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:46,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:01:46,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:46,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:46,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1137748220, now seen corresponding path program 2 times [2023-11-06 23:01:46,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:46,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857081216] [2023-11-06 23:01:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:46,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:46,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:46,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857081216] [2023-11-06 23:01:46,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857081216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:46,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:46,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:46,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705172087] [2023-11-06 23:01:46,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:46,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:46,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 460 [2023-11-06 23:01:46,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 55 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:46,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 460 [2023-11-06 23:01:46,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:46,416 INFO L124 PetriNetUnfolderBase]: 485/716 cut-off events. [2023-11-06 23:01:46,416 INFO L125 PetriNetUnfolderBase]: For 483/496 co-relation queries the response was YES. [2023-11-06 23:01:46,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 716 events. 485/716 cut-off events. For 483/496 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2229 event pairs, 99 based on Foata normal form. 27/569 useless extension candidates. Maximal degree in co-relation 2435. Up to 632 conditions per place. [2023-11-06 23:01:46,425 INFO L140 encePairwiseOnDemand]: 456/460 looper letters, 55 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-11-06 23:01:46,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 421 flow [2023-11-06 23:01:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-11-06 23:01:46,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644927536231884 [2023-11-06 23:01:46,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-11-06 23:01:46,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-11-06 23:01:46,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:46,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-11-06 23:01:46,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,439 INFO L175 Difference]: Start difference. First operand has 45 places, 55 transitions, 287 flow. Second operand 3 states and 641 transitions. [2023-11-06 23:01:46,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 421 flow [2023-11-06 23:01:46,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 363 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:46,452 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 238 flow [2023-11-06 23:01:46,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2023-11-06 23:01:46,454 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-11-06 23:01:46,454 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 238 flow [2023-11-06 23:01:46,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:46,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:01:46,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:46,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1159230998, now seen corresponding path program 3 times [2023-11-06 23:01:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:46,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278513709] [2023-11-06 23:01:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:46,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278513709] [2023-11-06 23:01:46,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278513709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:46,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:46,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:46,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901592386] [2023-11-06 23:01:46,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:46,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:46,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 460 [2023-11-06 23:01:46,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:46,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 460 [2023-11-06 23:01:46,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:46,742 INFO L124 PetriNetUnfolderBase]: 461/702 cut-off events. [2023-11-06 23:01:46,743 INFO L125 PetriNetUnfolderBase]: For 585/598 co-relation queries the response was YES. [2023-11-06 23:01:46,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2298 conditions, 702 events. 461/702 cut-off events. For 585/598 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2345 event pairs, 139 based on Foata normal form. 51/609 useless extension candidates. Maximal degree in co-relation 2285. Up to 458 conditions per place. [2023-11-06 23:01:46,750 INFO L140 encePairwiseOnDemand]: 455/460 looper letters, 49 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-11-06 23:01:46,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 342 flow [2023-11-06 23:01:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-11-06 23:01:46,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652173913043478 [2023-11-06 23:01:46,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-11-06 23:01:46,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-11-06 23:01:46,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:46,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-11-06 23:01:46,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,761 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 238 flow. Second operand 3 states and 642 transitions. [2023-11-06 23:01:46,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 342 flow [2023-11-06 23:01:46,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 309 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-06 23:01:46,766 INFO L231 Difference]: Finished difference. Result has 43 places, 46 transitions, 196 flow [2023-11-06 23:01:46,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=43, PETRI_TRANSITIONS=46} [2023-11-06 23:01:46,769 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2023-11-06 23:01:46,769 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 46 transitions, 196 flow [2023-11-06 23:01:46,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:46,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:46,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:01:46,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:46,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1270704650, now seen corresponding path program 4 times [2023-11-06 23:01:46,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:46,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996568026] [2023-11-06 23:01:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:46,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996568026] [2023-11-06 23:01:47,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996568026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:47,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:47,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:01:47,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836229060] [2023-11-06 23:01:47,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:47,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:01:47,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:01:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:01:47,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 460 [2023-11-06 23:01:47,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 46 transitions, 196 flow. Second operand has 9 states, 9 states have (on average 190.66666666666666) internal successors, (1716), 9 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:47,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:47,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 460 [2023-11-06 23:01:47,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:48,439 INFO L124 PetriNetUnfolderBase]: 540/835 cut-off events. [2023-11-06 23:01:48,439 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-11-06 23:01:48,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 835 events. 540/835 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3019 event pairs, 71 based on Foata normal form. 1/665 useless extension candidates. Maximal degree in co-relation 2584. Up to 632 conditions per place. [2023-11-06 23:01:48,448 INFO L140 encePairwiseOnDemand]: 449/460 looper letters, 77 selfloop transitions, 16 changer transitions 3/96 dead transitions. [2023-11-06 23:01:48,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 96 transitions, 547 flow [2023-11-06 23:01:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:01:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:01:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1774 transitions. [2023-11-06 23:01:48,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4285024154589372 [2023-11-06 23:01:48,459 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1774 transitions. [2023-11-06 23:01:48,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1774 transitions. [2023-11-06 23:01:48,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:48,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1774 transitions. [2023-11-06 23:01:48,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.11111111111111) internal successors, (1774), 9 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:48,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:48,478 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:48,479 INFO L175 Difference]: Start difference. First operand has 43 places, 46 transitions, 196 flow. Second operand 9 states and 1774 transitions. [2023-11-06 23:01:48,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 96 transitions, 547 flow [2023-11-06 23:01:48,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 96 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:48,485 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 302 flow [2023-11-06 23:01:48,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=302, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-11-06 23:01:48,486 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-11-06 23:01:48,486 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 302 flow [2023-11-06 23:01:48,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 190.66666666666666) internal successors, (1716), 9 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:48,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:48,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:01:48,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:48,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash -668842460, now seen corresponding path program 5 times [2023-11-06 23:01:48,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:48,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297598438] [2023-11-06 23:01:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:49,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:49,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297598438] [2023-11-06 23:01:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297598438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:49,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:01:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150062548] [2023-11-06 23:01:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:01:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:01:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:01:49,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 460 [2023-11-06 23:01:49,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 302 flow. Second operand has 9 states, 9 states have (on average 189.66666666666666) internal successors, (1707), 9 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:49,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:49,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 460 [2023-11-06 23:01:49,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:50,130 INFO L124 PetriNetUnfolderBase]: 607/947 cut-off events. [2023-11-06 23:01:50,130 INFO L125 PetriNetUnfolderBase]: For 857/857 co-relation queries the response was YES. [2023-11-06 23:01:50,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 947 events. 607/947 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3500 event pairs, 173 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3287. Up to 808 conditions per place. [2023-11-06 23:01:50,142 INFO L140 encePairwiseOnDemand]: 449/460 looper letters, 76 selfloop transitions, 18 changer transitions 3/97 dead transitions. [2023-11-06 23:01:50,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 667 flow [2023-11-06 23:01:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:01:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:01:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1755 transitions. [2023-11-06 23:01:50,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2023-11-06 23:01:50,151 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1755 transitions. [2023-11-06 23:01:50,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1755 transitions. [2023-11-06 23:01:50,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:50,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1755 transitions. [2023-11-06 23:01:50,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:50,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:50,170 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:50,170 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 302 flow. Second operand 9 states and 1755 transitions. [2023-11-06 23:01:50,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 667 flow [2023-11-06 23:01:50,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 620 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-06 23:01:50,182 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 434 flow [2023-11-06 23:01:50,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=434, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-11-06 23:01:50,183 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2023-11-06 23:01:50,183 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 434 flow [2023-11-06 23:01:50,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.66666666666666) internal successors, (1707), 9 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:50,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:50,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:50,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:01:50,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:50,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1037108026, now seen corresponding path program 6 times [2023-11-06 23:01:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68755497] [2023-11-06 23:01:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68755497] [2023-11-06 23:01:51,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68755497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:51,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:51,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:01:51,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664287176] [2023-11-06 23:01:51,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:51,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:01:51,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:01:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:01:51,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 460 [2023-11-06 23:01:51,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 434 flow. Second operand has 9 states, 9 states have (on average 189.66666666666666) internal successors, (1707), 9 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:51,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:51,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 460 [2023-11-06 23:01:51,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:51,931 INFO L124 PetriNetUnfolderBase]: 616/971 cut-off events. [2023-11-06 23:01:51,932 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-11-06 23:01:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 971 events. 616/971 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3716 event pairs, 163 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3574. Up to 832 conditions per place. [2023-11-06 23:01:51,944 INFO L140 encePairwiseOnDemand]: 449/460 looper letters, 86 selfloop transitions, 19 changer transitions 3/108 dead transitions. [2023-11-06 23:01:51,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 108 transitions, 798 flow [2023-11-06 23:01:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:01:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:01:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1757 transitions. [2023-11-06 23:01:51,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42439613526570047 [2023-11-06 23:01:51,953 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1757 transitions. [2023-11-06 23:01:51,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1757 transitions. [2023-11-06 23:01:51,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:51,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1757 transitions. [2023-11-06 23:01:51,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:51,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:51,973 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 460.0) internal successors, (4600), 10 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:51,973 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 434 flow. Second operand 9 states and 1757 transitions. [2023-11-06 23:01:51,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 108 transitions, 798 flow [2023-11-06 23:01:51,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 755 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:51,993 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 532 flow [2023-11-06 23:01:51,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-11-06 23:01:51,994 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2023-11-06 23:01:51,995 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 532 flow [2023-11-06 23:01:51,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.66666666666666) internal successors, (1707), 9 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:51,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:51,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:51,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:01:51,997 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:51,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1272732418, now seen corresponding path program 1 times [2023-11-06 23:01:51,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:51,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796018878] [2023-11-06 23:01:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:51,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:52,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796018878] [2023-11-06 23:01:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796018878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:52,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:52,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150003692] [2023-11-06 23:01:52,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:52,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:52,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 460 [2023-11-06 23:01:52,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:52,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:52,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 460 [2023-11-06 23:01:52,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:52,489 INFO L124 PetriNetUnfolderBase]: 804/1266 cut-off events. [2023-11-06 23:01:52,490 INFO L125 PetriNetUnfolderBase]: For 2133/2141 co-relation queries the response was YES. [2023-11-06 23:01:52,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1266 events. 804/1266 cut-off events. For 2133/2141 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5269 event pairs, 219 based on Foata normal form. 20/1038 useless extension candidates. Maximal degree in co-relation 4841. Up to 576 conditions per place. [2023-11-06 23:01:52,506 INFO L140 encePairwiseOnDemand]: 455/460 looper letters, 63 selfloop transitions, 39 changer transitions 4/108 dead transitions. [2023-11-06 23:01:52,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 904 flow [2023-11-06 23:01:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:01:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 864 transitions. [2023-11-06 23:01:52,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46956521739130436 [2023-11-06 23:01:52,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 864 transitions. [2023-11-06 23:01:52,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 864 transitions. [2023-11-06 23:01:52,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:52,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 864 transitions. [2023-11-06 23:01:52,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:52,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:52,532 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:52,532 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 532 flow. Second operand 4 states and 864 transitions. [2023-11-06 23:01:52,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 904 flow [2023-11-06 23:01:52,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 842 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-11-06 23:01:52,569 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 640 flow [2023-11-06 23:01:52,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=640, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-11-06 23:01:52,571 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2023-11-06 23:01:52,571 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 640 flow [2023-11-06 23:01:52,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:52,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:52,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:52,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:01:52,572 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:52,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1898475117, now seen corresponding path program 1 times [2023-11-06 23:01:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:52,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097740317] [2023-11-06 23:01:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:52,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097740317] [2023-11-06 23:01:52,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097740317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873447799] [2023-11-06 23:01:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:52,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:52,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:52,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:52,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:01:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:53,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:01:53,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:53,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873447799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:53,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:53,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 23:01:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22968266] [2023-11-06 23:01:53,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:53,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:01:53,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:01:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:01:53,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 460 [2023-11-06 23:01:53,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 640 flow. Second operand has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:53,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 460 [2023-11-06 23:01:53,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:54,084 INFO L124 PetriNetUnfolderBase]: 1246/1997 cut-off events. [2023-11-06 23:01:54,084 INFO L125 PetriNetUnfolderBase]: For 4990/5006 co-relation queries the response was YES. [2023-11-06 23:01:54,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8843 conditions, 1997 events. 1246/1997 cut-off events. For 4990/5006 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9228 event pairs, 582 based on Foata normal form. 80/1713 useless extension candidates. Maximal degree in co-relation 8818. Up to 1138 conditions per place. [2023-11-06 23:01:54,112 INFO L140 encePairwiseOnDemand]: 455/460 looper letters, 142 selfloop transitions, 7 changer transitions 5/156 dead transitions. [2023-11-06 23:01:54,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 1568 flow [2023-11-06 23:01:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:01:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:01:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1171 transitions. [2023-11-06 23:01:54,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42427536231884055 [2023-11-06 23:01:54,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1171 transitions. [2023-11-06 23:01:54,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1171 transitions. [2023-11-06 23:01:54,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:54,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1171 transitions. [2023-11-06 23:01:54,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.16666666666666) internal successors, (1171), 6 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,129 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,130 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 640 flow. Second operand 6 states and 1171 transitions. [2023-11-06 23:01:54,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 1568 flow [2023-11-06 23:01:54,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 156 transitions, 1530 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:54,164 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 704 flow [2023-11-06 23:01:54,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=704, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-11-06 23:01:54,165 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2023-11-06 23:01:54,166 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 704 flow [2023-11-06 23:01:54,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:54,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:54,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:01:54,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:54,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:54,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash -390014859, now seen corresponding path program 1 times [2023-11-06 23:01:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078726395] [2023-11-06 23:01:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078726395] [2023-11-06 23:01:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078726395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707730489] [2023-11-06 23:01:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:54,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:54,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:54,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:54,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:01:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:54,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:01:54,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:01:54,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:54,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707730489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:54,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:01:54,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 23:01:54,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903285580] [2023-11-06 23:01:54,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:54,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:54,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:54,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:54,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:01:54,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 460 [2023-11-06 23:01:54,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 704 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:54,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 460 [2023-11-06 23:01:54,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:55,471 INFO L124 PetriNetUnfolderBase]: 1476/2367 cut-off events. [2023-11-06 23:01:55,471 INFO L125 PetriNetUnfolderBase]: For 6137/6153 co-relation queries the response was YES. [2023-11-06 23:01:55,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10493 conditions, 2367 events. 1476/2367 cut-off events. For 6137/6153 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11324 event pairs, 281 based on Foata normal form. 130/1945 useless extension candidates. Maximal degree in co-relation 10465. Up to 873 conditions per place. [2023-11-06 23:01:55,501 INFO L140 encePairwiseOnDemand]: 456/460 looper letters, 88 selfloop transitions, 9 changer transitions 22/121 dead transitions. [2023-11-06 23:01:55,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 1167 flow [2023-11-06 23:01:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:01:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:01:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 870 transitions. [2023-11-06 23:01:55,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2023-11-06 23:01:55,506 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 870 transitions. [2023-11-06 23:01:55,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 870 transitions. [2023-11-06 23:01:55,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:55,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 870 transitions. [2023-11-06 23:01:55,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:55,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:55,514 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:55,514 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 704 flow. Second operand 4 states and 870 transitions. [2023-11-06 23:01:55,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 1167 flow [2023-11-06 23:01:55,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 1022 flow, removed 63 selfloop flow, removed 9 redundant places. [2023-11-06 23:01:55,553 INFO L231 Difference]: Finished difference. Result has 75 places, 49 transitions, 314 flow [2023-11-06 23:01:55,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=75, PETRI_TRANSITIONS=49} [2023-11-06 23:01:55,554 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2023-11-06 23:01:55,554 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 49 transitions, 314 flow [2023-11-06 23:01:55,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:55,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:55,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:55,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:55,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:01:55,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:01:55,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:55,761 INFO L85 PathProgramCache]: Analyzing trace with hash 998506096, now seen corresponding path program 2 times [2023-11-06 23:01:55,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:55,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156874824] [2023-11-06 23:01:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:55,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:56,690 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 23:01:56,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:56,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156874824] [2023-11-06 23:01:56,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156874824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:56,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201837684] [2023-11-06 23:01:56,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:56,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:56,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:56,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:56,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:01:56,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:01:56,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:56,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:01:56,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:57,197 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 23:01:57,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:57,312 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:01:57,313 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 25 treesize of output 12 [2023-11-06 23:01:57,642 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 23:01:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201837684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:57,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:57,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-06 23:01:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030778056] [2023-11-06 23:01:57,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:57,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 23:01:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 23:01:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-11-06 23:01:59,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 460 [2023-11-06 23:01:59,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 49 transitions, 314 flow. Second operand has 22 states, 22 states have (on average 173.72727272727272) internal successors, (3822), 22 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:59,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:59,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 460 [2023-11-06 23:01:59,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:01,585 INFO L124 PetriNetUnfolderBase]: 3501/5214 cut-off events. [2023-11-06 23:02:01,586 INFO L125 PetriNetUnfolderBase]: For 10280/10296 co-relation queries the response was YES. [2023-11-06 23:02:01,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 5214 events. 3501/5214 cut-off events. For 10280/10296 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26133 event pairs, 215 based on Foata normal form. 0/3848 useless extension candidates. Maximal degree in co-relation 21990. Up to 1963 conditions per place. [2023-11-06 23:02:01,671 INFO L140 encePairwiseOnDemand]: 450/460 looper letters, 225 selfloop transitions, 93 changer transitions 0/320 dead transitions. [2023-11-06 23:02:01,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 320 transitions, 2510 flow [2023-11-06 23:02:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:02:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 23:02:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4002 transitions. [2023-11-06 23:02:01,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2023-11-06 23:02:01,692 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4002 transitions. [2023-11-06 23:02:01,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4002 transitions. [2023-11-06 23:02:01,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:01,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4002 transitions. [2023-11-06 23:02:01,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 181.9090909090909) internal successors, (4002), 22 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 460.0) internal successors, (10580), 23 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,738 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 460.0) internal successors, (10580), 23 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,738 INFO L175 Difference]: Start difference. First operand has 75 places, 49 transitions, 314 flow. Second operand 22 states and 4002 transitions. [2023-11-06 23:02:01,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 320 transitions, 2510 flow [2023-11-06 23:02:01,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 320 transitions, 2316 flow, removed 97 selfloop flow, removed 3 redundant places. [2023-11-06 23:02:01,767 INFO L231 Difference]: Finished difference. Result has 92 places, 150 transitions, 1331 flow [2023-11-06 23:02:01,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1331, PETRI_PLACES=92, PETRI_TRANSITIONS=150} [2023-11-06 23:02:01,768 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-11-06 23:02:01,769 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 150 transitions, 1331 flow [2023-11-06 23:02:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 173.72727272727272) internal successors, (3822), 22 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:01,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:01,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 23:02:01,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:02:01,978 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:01,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:01,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1849172564, now seen corresponding path program 3 times [2023-11-06 23:02:01,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249856] [2023-11-06 23:02:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:01,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:03,017 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 23:02:03,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:03,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249856] [2023-11-06 23:02:03,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:03,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240156532] [2023-11-06 23:02:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:02:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:03,019 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:03,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:02:03,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:02:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:03,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:02:03,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:03,738 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 16 treesize of output 11 [2023-11-06 23:02:03,810 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 23:02:03,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:03,860 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_359) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-06 23:02:03,995 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:02:03,996 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 23:02:04,003 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 23:02:04,426 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 23:02:04,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240156532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:04,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:04,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 23:02:04,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062545505] [2023-11-06 23:02:04,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:04,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:02:04,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:04,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:02:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2023-11-06 23:02:04,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 460 [2023-11-06 23:02:04,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 150 transitions, 1331 flow. Second operand has 25 states, 25 states have (on average 151.24) internal successors, (3781), 25 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:04,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 460 [2023-11-06 23:02:04,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:10,890 INFO L124 PetriNetUnfolderBase]: 6469/9678 cut-off events. [2023-11-06 23:02:10,890 INFO L125 PetriNetUnfolderBase]: For 67990/68014 co-relation queries the response was YES. [2023-11-06 23:02:10,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55145 conditions, 9678 events. 6469/9678 cut-off events. For 67990/68014 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55006 event pairs, 463 based on Foata normal form. 168/8314 useless extension candidates. Maximal degree in co-relation 55111. Up to 2981 conditions per place. [2023-11-06 23:02:11,015 INFO L140 encePairwiseOnDemand]: 442/460 looper letters, 292 selfloop transitions, 245 changer transitions 0/539 dead transitions. [2023-11-06 23:02:11,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 539 transitions, 5632 flow [2023-11-06 23:02:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 23:02:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 23:02:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5090 transitions. [2023-11-06 23:02:11,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34578804347826086 [2023-11-06 23:02:11,039 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5090 transitions. [2023-11-06 23:02:11,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5090 transitions. [2023-11-06 23:02:11,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:11,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5090 transitions. [2023-11-06 23:02:11,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 159.0625) internal successors, (5090), 32 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 460.0) internal successors, (15180), 33 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,094 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 460.0) internal successors, (15180), 33 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,094 INFO L175 Difference]: Start difference. First operand has 92 places, 150 transitions, 1331 flow. Second operand 32 states and 5090 transitions. [2023-11-06 23:02:11,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 539 transitions, 5632 flow [2023-11-06 23:02:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 539 transitions, 5294 flow, removed 167 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:11,462 INFO L231 Difference]: Finished difference. Result has 138 places, 340 transitions, 4258 flow [2023-11-06 23:02:11,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4258, PETRI_PLACES=138, PETRI_TRANSITIONS=340} [2023-11-06 23:02:11,463 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 106 predicate places. [2023-11-06 23:02:11,463 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 340 transitions, 4258 flow [2023-11-06 23:02:11,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 151.24) internal successors, (3781), 25 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:11,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:11,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:02:11,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:11,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1167037350, now seen corresponding path program 4 times [2023-11-06 23:02:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:11,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131493215] [2023-11-06 23:02:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:11,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:12,925 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 23:02:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131493215] [2023-11-06 23:02:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131493215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848088172] [2023-11-06 23:02:12,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:02:12,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:12,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:12,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:12,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:02:13,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:02:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:13,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 23:02:13,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:13,112 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 42 treesize of output 38 [2023-11-06 23:02:13,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:13,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:02:13,530 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 23:02:13,602 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 23:02:13,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:13,646 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_408 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_408) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-06 23:02:13,823 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:02:13,824 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 85 treesize of output 77 [2023-11-06 23:02:13,835 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 64 treesize of output 58 [2023-11-06 23:02:13,842 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 58 treesize of output 46 [2023-11-06 23:02:14,269 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 23:02:14,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848088172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:14,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:14,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-11-06 23:02:14,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514800007] [2023-11-06 23:02:14,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:02:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:02:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=4, NotChecked=48, Total=702 [2023-11-06 23:02:14,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 460 [2023-11-06 23:02:14,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 340 transitions, 4258 flow. Second operand has 27 states, 27 states have (on average 148.07407407407408) internal successors, (3998), 27 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 460 [2023-11-06 23:02:14,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:17,535 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 23:02:20,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:02:25,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:02:30,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:02:32,358 WARN L539 Checker$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 23:02:34,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:02:34,916 INFO L124 PetriNetUnfolderBase]: 9675/14500 cut-off events. [2023-11-06 23:02:34,916 INFO L125 PetriNetUnfolderBase]: For 211002/211026 co-relation queries the response was YES. [2023-11-06 23:02:35,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112773 conditions, 14500 events. 9675/14500 cut-off events. For 211002/211026 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 86797 event pairs, 817 based on Foata normal form. 269/13234 useless extension candidates. Maximal degree in co-relation 112722. Up to 6230 conditions per place. [2023-11-06 23:02:35,254 INFO L140 encePairwiseOnDemand]: 450/460 looper letters, 524 selfloop transitions, 301 changer transitions 0/827 dead transitions. [2023-11-06 23:02:35,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 827 transitions, 12076 flow [2023-11-06 23:02:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 23:02:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 23:02:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4379 transitions. [2023-11-06 23:02:35,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33998447204968946 [2023-11-06 23:02:35,266 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4379 transitions. [2023-11-06 23:02:35,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4379 transitions. [2023-11-06 23:02:35,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:35,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4379 transitions. [2023-11-06 23:02:35,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 156.39285714285714) internal successors, (4379), 28 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:35,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 460.0) internal successors, (13340), 29 states have internal predecessors, (13340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:35,297 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 460.0) internal successors, (13340), 29 states have internal predecessors, (13340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:35,297 INFO L175 Difference]: Start difference. First operand has 138 places, 340 transitions, 4258 flow. Second operand 28 states and 4379 transitions. [2023-11-06 23:02:35,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 827 transitions, 12076 flow [2023-11-06 23:02:37,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 827 transitions, 9838 flow, removed 1105 selfloop flow, removed 8 redundant places. [2023-11-06 23:02:37,479 INFO L231 Difference]: Finished difference. Result has 174 places, 462 transitions, 6137 flow [2023-11-06 23:02:37,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=3435, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6137, PETRI_PLACES=174, PETRI_TRANSITIONS=462} [2023-11-06 23:02:37,480 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 142 predicate places. [2023-11-06 23:02:37,480 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 462 transitions, 6137 flow [2023-11-06 23:02:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 148.07407407407408) internal successors, (3998), 27 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:37,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:37,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:37,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:37,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:37,688 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:37,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash -874766145, now seen corresponding path program 5 times [2023-11-06 23:02:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:37,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126795176] [2023-11-06 23:02:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:38,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:38,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126795176] [2023-11-06 23:02:38,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126795176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:38,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795058722] [2023-11-06 23:02:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:02:38,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:38,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:38,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:02:39,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:02:39,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:39,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:02:39,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:02:39,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:39,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795058722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:39,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:02:39,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2023-11-06 23:02:39,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009765527] [2023-11-06 23:02:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:39,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:02:39,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:39,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:02:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:02:39,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 460 [2023-11-06 23:02:39,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 462 transitions, 6137 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:39,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 460 [2023-11-06 23:02:39,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:44,384 INFO L124 PetriNetUnfolderBase]: 10976/16391 cut-off events. [2023-11-06 23:02:44,385 INFO L125 PetriNetUnfolderBase]: For 201948/201972 co-relation queries the response was YES. [2023-11-06 23:02:44,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120510 conditions, 16391 events. 10976/16391 cut-off events. For 201948/201972 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 99281 event pairs, 3141 based on Foata normal form. 212/14827 useless extension candidates. Maximal degree in co-relation 120446. Up to 14279 conditions per place. [2023-11-06 23:02:44,674 INFO L140 encePairwiseOnDemand]: 453/460 looper letters, 512 selfloop transitions, 62 changer transitions 0/576 dead transitions. [2023-11-06 23:02:44,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 576 transitions, 8754 flow [2023-11-06 23:02:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:02:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:02:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1623 transitions. [2023-11-06 23:02:44,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410326086956522 [2023-11-06 23:02:44,679 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1623 transitions. [2023-11-06 23:02:44,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1623 transitions. [2023-11-06 23:02:44,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:44,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1623 transitions. [2023-11-06 23:02:44,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.875) internal successors, (1623), 8 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:44,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 460.0) internal successors, (4140), 9 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:44,690 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 460.0) internal successors, (4140), 9 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:44,690 INFO L175 Difference]: Start difference. First operand has 174 places, 462 transitions, 6137 flow. Second operand 8 states and 1623 transitions. [2023-11-06 23:02:44,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 576 transitions, 8754 flow [2023-11-06 23:02:46,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 576 transitions, 8397 flow, removed 141 selfloop flow, removed 10 redundant places. [2023-11-06 23:02:46,974 INFO L231 Difference]: Finished difference. Result has 175 places, 492 transitions, 6425 flow [2023-11-06 23:02:46,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6425, PETRI_PLACES=175, PETRI_TRANSITIONS=492} [2023-11-06 23:02:46,975 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 143 predicate places. [2023-11-06 23:02:46,975 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 492 transitions, 6425 flow [2023-11-06 23:02:46,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:46,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:46,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:46,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:47,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:02:47,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:02:47,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:47,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1476919123, now seen corresponding path program 6 times [2023-11-06 23:02:47,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:47,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959361088] [2023-11-06 23:02:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:47,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:48,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:48,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959361088] [2023-11-06 23:02:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959361088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928315362] [2023-11-06 23:02:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:02:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:48,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:48,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:02:48,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:02:48,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:48,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:02:48,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:49,111 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 23:02:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:02:49,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:49,242 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_505 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_505) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-06 23:02:49,361 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:02:49,361 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 23:02:49,368 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 23:02:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:02:49,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928315362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:49,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:49,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2023-11-06 23:02:49,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344987033] [2023-11-06 23:02:49,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:49,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:02:49,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:02:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=327, Unknown=1, NotChecked=36, Total=420 [2023-11-06 23:02:49,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 460 [2023-11-06 23:02:49,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 492 transitions, 6425 flow. Second operand has 21 states, 21 states have (on average 151.85714285714286) internal successors, (3189), 21 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:49,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:49,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 460 [2023-11-06 23:02:49,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:56,819 INFO L124 PetriNetUnfolderBase]: 11756/17572 cut-off events. [2023-11-06 23:02:56,820 INFO L125 PetriNetUnfolderBase]: For 229105/229137 co-relation queries the response was YES. [2023-11-06 23:02:57,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132077 conditions, 17572 events. 11756/17572 cut-off events. For 229105/229137 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 107681 event pairs, 2065 based on Foata normal form. 33/15854 useless extension candidates. Maximal degree in co-relation 132011. Up to 8710 conditions per place. [2023-11-06 23:02:57,107 INFO L140 encePairwiseOnDemand]: 452/460 looper letters, 408 selfloop transitions, 216 changer transitions 0/626 dead transitions. [2023-11-06 23:02:57,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 626 transitions, 9367 flow [2023-11-06 23:02:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:02:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:02:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2035 transitions. [2023-11-06 23:02:57,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403010033444816 [2023-11-06 23:02:57,115 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2035 transitions. [2023-11-06 23:02:57,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2035 transitions. [2023-11-06 23:02:57,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:57,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2035 transitions. [2023-11-06 23:02:57,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 156.53846153846155) internal successors, (2035), 13 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:57,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 460.0) internal successors, (6440), 14 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:57,130 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 460.0) internal successors, (6440), 14 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:57,130 INFO L175 Difference]: Start difference. First operand has 175 places, 492 transitions, 6425 flow. Second operand 13 states and 2035 transitions. [2023-11-06 23:02:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 626 transitions, 9367 flow [2023-11-06 23:03:00,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 626 transitions, 9166 flow, removed 94 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:00,238 INFO L231 Difference]: Finished difference. Result has 188 places, 517 transitions, 7405 flow [2023-11-06 23:03:00,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7405, PETRI_PLACES=188, PETRI_TRANSITIONS=517} [2023-11-06 23:03:00,240 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 156 predicate places. [2023-11-06 23:03:00,240 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 517 transitions, 7405 flow [2023-11-06 23:03:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 151.85714285714286) internal successors, (3189), 21 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:00,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:00,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:00,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 23:03:00,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:03:00,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:00,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1316778425, now seen corresponding path program 7 times [2023-11-06 23:03:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909424631] [2023-11-06 23:03:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:02,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:02,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909424631] [2023-11-06 23:03:02,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909424631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459520564] [2023-11-06 23:03:02,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:03:02,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:02,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:02,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:03:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:02,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:03:02,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:02,567 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 23:03:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:02,643 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 23:03:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:03:02,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:02,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:02,960 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 85 treesize of output 77 [2023-11-06 23:03:02,971 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 64 treesize of output 52 [2023-11-06 23:03:02,977 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 52 treesize of output 46 [2023-11-06 23:03:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:03:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459520564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:03,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:03,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 24 [2023-11-06 23:03:03,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244759428] [2023-11-06 23:03:03,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:03,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=519, Unknown=6, NotChecked=0, Total=600 [2023-11-06 23:03:05,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 460 [2023-11-06 23:03:05,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 517 transitions, 7405 flow. Second operand has 25 states, 25 states have (on average 171.44) internal successors, (4286), 25 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:05,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:05,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 460 [2023-11-06 23:03:05,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:12,469 INFO L124 PetriNetUnfolderBase]: 11938/17855 cut-off events. [2023-11-06 23:03:12,469 INFO L125 PetriNetUnfolderBase]: For 249286/249318 co-relation queries the response was YES. [2023-11-06 23:03:12,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138146 conditions, 17855 events. 11938/17855 cut-off events. For 249286/249318 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 109778 event pairs, 1591 based on Foata normal form. 38/16132 useless extension candidates. Maximal degree in co-relation 138078. Up to 7429 conditions per place. [2023-11-06 23:03:12,834 INFO L140 encePairwiseOnDemand]: 452/460 looper letters, 438 selfloop transitions, 224 changer transitions 0/664 dead transitions. [2023-11-06 23:03:12,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 664 transitions, 10166 flow [2023-11-06 23:03:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:03:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:03:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2471 transitions. [2023-11-06 23:03:12,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38369565217391305 [2023-11-06 23:03:12,845 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2471 transitions. [2023-11-06 23:03:12,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2471 transitions. [2023-11-06 23:03:12,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:12,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2471 transitions. [2023-11-06 23:03:12,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 176.5) internal successors, (2471), 14 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:12,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 460.0) internal successors, (6900), 15 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:12,865 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 460.0) internal successors, (6900), 15 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:12,866 INFO L175 Difference]: Start difference. First operand has 188 places, 517 transitions, 7405 flow. Second operand 14 states and 2471 transitions. [2023-11-06 23:03:12,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 664 transitions, 10166 flow [2023-11-06 23:03:17,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 664 transitions, 9939 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-11-06 23:03:17,226 INFO L231 Difference]: Finished difference. Result has 191 places, 526 transitions, 7757 flow [2023-11-06 23:03:17,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=7130, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7757, PETRI_PLACES=191, PETRI_TRANSITIONS=526} [2023-11-06 23:03:17,227 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 159 predicate places. [2023-11-06 23:03:17,228 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 526 transitions, 7757 flow [2023-11-06 23:03:17,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 171.44) internal successors, (4286), 25 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:17,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:17,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:17,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:17,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:03:17,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:17,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:17,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1203155187, now seen corresponding path program 1 times [2023-11-06 23:03:17,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:17,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532766542] [2023-11-06 23:03:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:17,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:03:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:17,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532766542] [2023-11-06 23:03:17,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532766542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:17,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748798686] [2023-11-06 23:03:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:17,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:17,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:17,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:17,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:03:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:17,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:17,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:03:18,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:03:18,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748798686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:18,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:18,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 23:03:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567911016] [2023-11-06 23:03:18,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:18,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:03:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:03:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:03:18,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 460 [2023-11-06 23:03:18,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 526 transitions, 7757 flow. Second operand has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:18,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:18,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 460 [2023-11-06 23:03:18,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:27,266 INFO L124 PetriNetUnfolderBase]: 18569/28036 cut-off events. [2023-11-06 23:03:27,267 INFO L125 PetriNetUnfolderBase]: For 432093/432157 co-relation queries the response was YES. [2023-11-06 23:03:27,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216967 conditions, 28036 events. 18569/28036 cut-off events. For 432093/432157 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 186402 event pairs, 6324 based on Foata normal form. 978/26381 useless extension candidates. Maximal degree in co-relation 216904. Up to 17831 conditions per place. [2023-11-06 23:03:27,712 INFO L140 encePairwiseOnDemand]: 455/460 looper letters, 518 selfloop transitions, 7 changer transitions 457/984 dead transitions. [2023-11-06 23:03:27,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 984 transitions, 15905 flow [2023-11-06 23:03:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:03:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1166 transitions. [2023-11-06 23:03:27,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42246376811594205 [2023-11-06 23:03:27,716 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1166 transitions. [2023-11-06 23:03:27,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1166 transitions. [2023-11-06 23:03:27,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:27,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1166 transitions. [2023-11-06 23:03:27,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.33333333333334) internal successors, (1166), 6 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:27,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:27,722 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:27,722 INFO L175 Difference]: Start difference. First operand has 191 places, 526 transitions, 7757 flow. Second operand 6 states and 1166 transitions. [2023-11-06 23:03:27,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 984 transitions, 15905 flow [2023-11-06 23:03:35,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 984 transitions, 15834 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-06 23:03:35,129 INFO L231 Difference]: Finished difference. Result has 192 places, 527 transitions, 7886 flow [2023-11-06 23:03:35,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7886, PETRI_PLACES=192, PETRI_TRANSITIONS=527} [2023-11-06 23:03:35,130 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 160 predicate places. [2023-11-06 23:03:35,130 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 527 transitions, 7886 flow [2023-11-06 23:03:35,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:35,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:35,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 23:03:35,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:35,332 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:03:35,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1926948809, now seen corresponding path program 2 times [2023-11-06 23:03:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:35,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744451299] [2023-11-06 23:03:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:03:36,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:36,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744451299] [2023-11-06 23:03:36,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744451299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:36,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61288873] [2023-11-06 23:03:36,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:36,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:36,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:36,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625ea0d0-83e4-4ba7-a556-895ee8681337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:03:36,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:36,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:03:36,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:03:36,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:36,798 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:03:36,798 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 24 treesize of output 11 [2023-11-06 23:03:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:03:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61288873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:37,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 23:03:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264125671] [2023-11-06 23:03:37,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:03:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:03:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:03:38,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 460 [2023-11-06 23:03:38,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 527 transitions, 7886 flow. Second operand has 23 states, 23 states have (on average 177.17391304347825) internal successors, (4075), 23 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:38,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:38,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 460 [2023-11-06 23:03:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand